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II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-16T21:49:49.000Z","date":"2018-08-15","kind":"other","acquired":false,"shares":498500,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owned more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Represents a pro rata in-kind distribution for no consideration to the limited partners in Legion Partners I."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Represents a pro rata in-kind distribution for no consideration to the limited partners in Legion Partners I."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents securities beneficially owned by Legion Partners I. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":610733,"source":{"system":"sec-edgar","filing":"0000921895-18-002369","document":"form409050008_08162018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002369/form409050008_08162018.xml","form_type":"4"}},{"id":3845588,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-14T21:33:13.000Z","date":"2018-08-10","kind":"sale","acquired":false,"shares":528,"price":24.02,"value":12682.56,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents securities beneficially owned by Legion Partners Special II. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":324114,"source":{"system":"sec-edgar","filing":"0000921895-18-002348","document":"form409050008_08142018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002348/form409050008_08142018.xml","form_type":"4"}},{"id":3845587,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-14T21:33:13.000Z","date":"2018-08-10","kind":"sale","acquired":false,"shares":172,"price":24.02,"value":4131.44,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents securities beneficially owned by Legion Partners II. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships,General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":105757,"source":{"system":"sec-edgar","filing":"0000921895-18-002348","document":"form409050008_08142018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002348/form409050008_08142018.xml","form_type":"4"}},{"id":3845586,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-14T21:33:13.000Z","date":"2018-08-10","kind":"sale","acquired":false,"shares":1806,"price":24.02,"value":43380.12,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents securities beneficially owned by Legion Partners I. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1109233,"source":{"system":"sec-edgar","filing":"0000921895-18-002348","document":"form409050008_08142018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002348/form409050008_08142018.xml","form_type":"4"}},{"id":3849094,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-09","kind":"sale","acquired":false,"shares":1053,"price":24.08,"value":25356.24,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents securities beneficially owned by Legion Partners Special II. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":324642,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3849093,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-08","kind":"sale","acquired":false,"shares":1158,"price":24.1,"value":27907.8,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents securities beneficially owned by Legion Partners Special II. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":325695,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3849092,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-07","kind":"sale","acquired":false,"shares":484,"price":24.37,"value":11795.08,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Represents securities beneficially owned by Legion Partners Special II. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":326853,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3849091,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-09","kind":"sale","acquired":false,"shares":343,"price":24.08,"value":8259.44,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents securities beneficially owned by Legion Partners II. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships,General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":105929,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3849090,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-08","kind":"sale","acquired":false,"shares":378,"price":24.1,"value":9109.8,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents securities beneficially owned by Legion Partners II. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships,General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":106272,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3849089,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-07","kind":"sale","acquired":false,"shares":158,"price":24.37,"value":3850.46,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents securities beneficially owned by Legion Partners II. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships,General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":106650,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3849088,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-09","kind":"sale","acquired":false,"shares":3604,"price":24.08,"value":86784.32,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents securities beneficially owned by Legion Partners I.  General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1111039,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3849087,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-08","kind":"sale","acquired":false,"shares":3962,"price":24.1,"value":95484.2,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents securities beneficially owned by Legion Partners I.  General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1114643,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3849086,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-08-09T23:39:05.000Z","date":"2018-08-07","kind":"sale","acquired":false,"shares":1658,"price":24.37,"value":40405.46,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Represents securities beneficially owned by Legion Partners I.  General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1118605,"source":{"system":"sec-edgar","filing":"0000921895-18-002254","document":"form409050008_08092018.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000092189518002254/form409050008_08092018.xml","form_type":"4"}},{"id":3860417,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Call Option","published_at":"2018-07-27T20:43:47.000Z","date":"2018-07-26","kind":"purchase","acquired":true,"shares":31,"price":0.2815,"value":8.7265,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II bought to cover these call options that were previously sold short.  The balance of the short call options that Legion Partners Special II continues to hold create the obligation to sell shares of common stock of LB Foster Company subject to the option. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":187,"derivative":{"exercise_price":25,"exercise_date":"2018-07-26","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":3100},"source":{"system":"sec-edgar","filing":"0001560207-18-000029","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000029/primary_doc.xml","form_type":"4"}},{"id":3860416,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Call Option","published_at":"2018-07-27T20:43:47.000Z","date":"2018-07-26","kind":"purchase","acquired":true,"shares":10,"price":0.2815,"value":2.815,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II bought to cover these call options that were previously sold short.  The balance of the short call options that Legion Partners II continues to hold create the obligation to sell shares of common stock of LB Foster Company subject to the option. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships,General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":61,"derivative":{"exercise_price":25,"exercise_date":"2018-07-26","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":1000},"source":{"system":"sec-edgar","filing":"0001560207-18-000029","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000029/primary_doc.xml","form_type":"4"}},{"id":3860415,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Call Option","published_at":"2018-07-27T20:43:47.000Z","date":"2018-07-26","kind":"purchase","acquired":true,"shares":108,"price":0.2815,"value":30.402,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I bought to cover these call options that were previously sold short.  The balance of the short call options that Legion Partners I continues to hold create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":639,"derivative":{"exercise_price":25,"exercise_date":"2018-07-26","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":10800},"source":{"system":"sec-edgar","filing":"0001560207-18-000029","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000029/primary_doc.xml","form_type":"4"}},{"id":3900958,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Call Option","published_at":"2018-06-08T20:01:33.000Z","date":"2018-06-06","kind":"sale","acquired":false,"shares":26,"price":1.5605,"value":40.573,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II sold short these call options which create the obligation to sell shares of common stock of LB Foster Company subject to the option. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":218,"derivative":{"exercise_price":25,"exercise_date":"2018-06-06","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":2600},"source":{"system":"sec-edgar","filing":"0001560207-18-000023","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000023/primary_doc.xml","form_type":"4"}},{"id":3900957,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Call Option","published_at":"2018-06-08T20:01:33.000Z","date":"2018-06-06","kind":"sale","acquired":false,"shares":8,"price":1.5605,"value":12.484,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II sold short these call options which create the obligation to sell shares of common stock of LB Foster Company subject to the option. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships,General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":71,"derivative":{"exercise_price":25,"exercise_date":"2018-06-06","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":800},"source":{"system":"sec-edgar","filing":"0001560207-18-000023","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000023/primary_doc.xml","form_type":"4"}},{"id":3900956,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Call Option","published_at":"2018-06-08T20:01:33.000Z","date":"2018-06-06","kind":"sale","acquired":false,"shares":86,"price":1.5605,"value":134.203,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":747,"derivative":{"exercise_price":25,"exercise_date":"2018-06-06","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":8600},"source":{"system":"sec-edgar","filing":"0001560207-18-000023","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000023/primary_doc.xml","form_type":"4"}},{"id":3911702,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-06-01T20:17:48.000Z","date":"2018-05-30","kind":"sale","acquired":false,"shares":23,"price":1.7779,"value":40.8917,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC\n(\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II sold short these call options which create the obligation to sell shares of common stock of LB Foster Company subject to the option. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":192,"derivative":{"exercise_price":25,"exercise_date":"2018-05-30","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":2300},"source":{"system":"sec-edgar","filing":"0001560207-18-000020","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000020/primary_doc.xml","form_type":"4"}},{"id":3911701,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-06-01T20:17:48.000Z","date":"2018-05-30","kind":"sale","acquired":false,"shares":8,"price":1.7779,"value":14.2232,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC\n(\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II sold short these call options which create the obligation to sell shares of common stock of LB Foster Company subject to the option. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships,General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":63,"derivative":{"exercise_price":25,"exercise_date":"2018-05-30","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":800},"source":{"system":"sec-edgar","filing":"0001560207-18-000020","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000020/primary_doc.xml","form_type":"4"}},{"id":3911700,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-06-01T20:17:48.000Z","date":"2018-05-30","kind":"sale","acquired":false,"shares":80,"price":1.7779,"value":142.232,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC\n(\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":661,"derivative":{"exercise_price":25,"exercise_date":"2018-05-30","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":8000},"source":{"system":"sec-edgar","filing":"0001560207-18-000020","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000020/primary_doc.xml","form_type":"4"}},{"id":3917909,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-25T20:31:55.000Z","date":"2018-05-24","kind":"sale","acquired":false,"shares":46,"price":1.5129,"value":69.5934,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":169,"derivative":{"exercise_price":25,"exercise_date":"2018-05-24","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":4600},"source":{"system":"sec-edgar","filing":"0001560207-18-000019","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000019/primary_doc.xml","form_type":"4"}},{"id":3917908,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-25T20:31:55.000Z","date":"2018-05-23","kind":"sale","acquired":false,"shares":28,"price":1.4679,"value":41.1012,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":123,"derivative":{"exercise_price":25,"exercise_date":"2018-05-23","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":2800},"source":{"system":"sec-edgar","filing":"0001560207-18-000019","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000019/primary_doc.xml","form_type":"4"}},{"id":3917907,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-25T20:31:55.000Z","date":"2018-05-24","kind":"sale","acquired":false,"shares":15,"price":1.5129,"value":22.6935,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II sold short these call options which create the obligation to sell shares of common stock (Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":55,"derivative":{"exercise_price":25,"exercise_date":"2018-05-24","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":1500},"source":{"system":"sec-edgar","filing":"0001560207-18-000019","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000019/primary_doc.xml","form_type":"4"}},{"id":3917906,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-25T20:31:55.000Z","date":"2018-05-23","kind":"sale","acquired":false,"shares":9,"price":1.4679,"value":13.2111,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II sold short these call options which create the obligation to sell shares of common stock (Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":40,"derivative":{"exercise_price":25,"exercise_date":"2018-05-23","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":900},"source":{"system":"sec-edgar","filing":"0001560207-18-000019","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000019/primary_doc.xml","form_type":"4"}},{"id":3917905,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-25T20:31:55.000Z","date":"2018-05-24","kind":"sale","acquired":false,"shares":156,"price":1.5129,"value":236.0124,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":581,"derivative":{"exercise_price":25,"exercise_date":"2018-05-24","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":15600},"source":{"system":"sec-edgar","filing":"0001560207-18-000019","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000019/primary_doc.xml","form_type":"4"}},{"id":3917904,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-25T20:31:55.000Z","date":"2018-05-23","kind":"sale","acquired":false,"shares":97,"price":1.4679,"value":142.3863,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":425,"derivative":{"exercise_price":25,"exercise_date":"2018-05-23","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":9700},"source":{"system":"sec-edgar","filing":"0001560207-18-000019","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000019/primary_doc.xml","form_type":"4"}},{"id":3923048,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-22","kind":"sale","acquired":false,"shares":36,"price":1.3847,"value":49.8492,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II sold short these call options which create the obligation to sell shares of common stock of the Issuer subject to the option. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":95,"derivative":{"exercise_price":25,"exercise_date":"2018-05-22","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":3600},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3923047,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-22","kind":"sale","acquired":false,"shares":12,"price":1.3847,"value":16.6164,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II sold short these call options which create the obligation to sell shares of common stock of the Issuer subject to the option. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":31,"derivative":{"exercise_price":25,"exercise_date":"2018-05-22","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":1200},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3923046,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-22","kind":"sale","acquired":false,"shares":125,"price":1.3847,"value":173.0875,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":328,"derivative":{"exercise_price":25,"exercise_date":"2018-05-22","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":12500},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3923045,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-21","kind":"sale","acquired":false,"shares":54,"price":1.3183,"value":71.1882,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II sold short these call options which create the obligation to sell shares of common stock of the Issuer subject to the option. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":59,"derivative":{"exercise_price":25,"exercise_date":"2018-05-21","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":5400},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3923044,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-18","kind":"sale","acquired":false,"shares":5,"price":1.3205,"value":6.6025,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II sold short these call options which create the obligation to sell shares of common stock of the Issuer subject to the option. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":5,"derivative":{"exercise_price":25,"exercise_date":"2018-05-18","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":500},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3923043,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-21","kind":"sale","acquired":false,"shares":18,"price":1.3183,"value":23.7294,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II sold short these call options which create the obligation to sell shares of common stock of the Issuer subject to the option. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":19,"derivative":{"exercise_price":25,"exercise_date":"2018-05-21","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":1800},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3923042,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-18","kind":"sale","acquired":false,"shares":1,"price":1.3205,"value":1.3205,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II sold short these call options which create the obligation to sell shares of common stock of the Issuer subject to the option. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":1,"derivative":{"exercise_price":25,"exercise_date":"2018-05-18","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":100},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3923041,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-21","kind":"sale","acquired":false,"shares":187,"price":1.3183,"value":246.5221,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":203,"derivative":{"exercise_price":25,"exercise_date":"2018-05-21","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":18700},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3923040,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Fund Managed by IA"}}],"security":"Call Option","published_at":"2018-05-22T20:42:18.000Z","date":"2018-05-18","kind":"sale","acquired":false,"shares":16,"price":1.3205,"value":21.128,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F5","text":"Represents an Obligation to sell the equity securities subject to the option."},{"field":"derivative.underlying","element":"underlyingSecurityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I sold short these call options which create the obligation to sell shares of common stock (\"Common Stock\") of LB Foster Company (the \"Issuer\") subject to the option. General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":16,"derivative":{"exercise_price":25,"exercise_date":"2018-05-18","expiration_date":"2018-08-17","underlying":"Common Stock","underlying_shares":1600},"source":{"system":"sec-edgar","filing":"0001560207-18-000018","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000018/primary_doc.xml","form_type":"4"}},{"id":3955569,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-27T20:07:23.000Z","date":"2018-04-26","kind":"purchase","acquired":false,"shares":126,"price":25.02,"value":3152.52,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":327337,"source":{"system":"sec-edgar","filing":"0001560207-18-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000013/primary_doc.xml","form_type":"4"}},{"id":3955568,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-27T20:07:23.000Z","date":"2018-04-25","kind":"purchase","acquired":false,"shares":906,"price":25.3,"value":22921.8,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":327463,"source":{"system":"sec-edgar","filing":"0001560207-18-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000013/primary_doc.xml","form_type":"4"}},{"id":3955567,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-27T20:07:23.000Z","date":"2018-04-26","kind":"purchase","acquired":false,"shares":41,"price":25.02,"value":1025.82,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":106808,"source":{"system":"sec-edgar","filing":"0001560207-18-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000013/primary_doc.xml","form_type":"4"}},{"id":3955566,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-27T20:07:23.000Z","date":"2018-04-25","kind":"purchase","acquired":false,"shares":295,"price":25.3,"value":7463.5,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":106849,"source":{"system":"sec-edgar","filing":"0001560207-18-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000013/primary_doc.xml","form_type":"4"}},{"id":3955565,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-27T20:07:23.000Z","date":"2018-04-26","kind":"purchase","acquired":false,"shares":433,"price":25.02,"value":10833.66,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1120263,"source":{"system":"sec-edgar","filing":"0001560207-18-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000013/primary_doc.xml","form_type":"4"}},{"id":3955564,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-27T20:07:23.000Z","date":"2018-04-25","kind":"purchase","acquired":false,"shares":3099,"price":25.3,"value":78404.7,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1120696,"source":{"system":"sec-edgar","filing":"0001560207-18-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000013/primary_doc.xml","form_type":"4"}},{"id":3959725,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-20","kind":"purchase","acquired":false,"shares":644,"price":25.7,"value":16550.8,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":328369,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3959724,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-19","kind":"purchase","acquired":false,"shares":1059,"price":25.83,"value":27353.97,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":329013,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3959723,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-18","kind":"purchase","acquired":false,"shares":1348,"price":25.63,"value":34549.24,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":330072,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3959722,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-20","kind":"purchase","acquired":false,"shares":210,"price":25.7,"value":5397.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common\nStock owned by Legion Partners II."}],"balance_after":107144,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3959721,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-19","kind":"purchase","acquired":false,"shares":346,"price":25.83,"value":8937.18,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common\nStock owned by Legion Partners II."}],"balance_after":107354,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3959720,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-18","kind":"purchase","acquired":false,"shares":440,"price":25.63,"value":11277.2,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common\nStock owned by Legion Partners II."}],"balance_after":107700,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3959719,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-20","kind":"purchase","acquired":false,"shares":2202,"price":25.7,"value":56591.4,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1123795,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3959718,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-19","kind":"purchase","acquired":false,"shares":3625,"price":25.83,"value":93633.75,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1125997,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3959717,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-20T20:46:29.000Z","date":"2018-04-18","kind":"purchase","acquired":false,"shares":4612,"price":25.63,"value":118205.56,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1129622,"source":{"system":"sec-edgar","filing":"0001560207-18-000011","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000011/primary_doc.xml","form_type":"4"}},{"id":3964404,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-13T21:10:02.000Z","date":"2018-04-13","kind":"purchase","acquired":false,"shares":232,"price":25.08,"value":5818.56,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":331420,"source":{"system":"sec-edgar","filing":"0001560207-18-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000010/primary_doc.xml","form_type":"4"}},{"id":3964403,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-13T21:10:02.000Z","date":"2018-04-12","kind":"purchase","acquired":false,"shares":1965,"price":25.13,"value":49380.45,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":331652,"source":{"system":"sec-edgar","filing":"0001560207-18-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000010/primary_doc.xml","form_type":"4"}},{"id":3964402,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-13T21:10:02.000Z","date":"2018-04-13","kind":"purchase","acquired":false,"shares":75,"price":25.08,"value":1881.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":108140,"source":{"system":"sec-edgar","filing":"0001560207-18-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000010/primary_doc.xml","form_type":"4"}},{"id":3964401,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-13T21:10:02.000Z","date":"2018-04-12","kind":"purchase","acquired":false,"shares":641,"price":25.13,"value":16108.33,"ownership":{"direct":false,"nature":"Legion Partners, L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Legion Partners II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners II, Legion Partners Asset Management is the investment advisor of Legion Partners II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners II."}],"balance_after":108215,"source":{"system":"sec-edgar","filing":"0001560207-18-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000010/primary_doc.xml","form_type":"4"}},{"id":3964400,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-13T21:10:02.000Z","date":"2018-04-13","kind":"purchase","acquired":false,"shares":793,"price":25.08,"value":19888.44,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1134234,"source":{"system":"sec-edgar","filing":"0001560207-18-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000010/primary_doc.xml","form_type":"4"}},{"id":3964399,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":1,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":6,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":7,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":8,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2018-04-13T21:10:02.000Z","date":"2018-04-12","kind":"purchase","acquired":false,"shares":6723,"price":25.13,"value":168948.99,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2018. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1135027,"source":{"system":"sec-edgar","filing":"0001560207-18-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020718000010/primary_doc.xml","form_type":"4"}},{"id":4191516,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-10-05T16:38:42.000Z","date":"2017-09-30","kind":"grant","acquired":true,"shares":549,"price":22.75,"value":12489.75,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\")."},{"field":"security","element":"securityTitle","label":"F2","text":"As of the transaction date set forth above, each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F8","text":"This reflects deferred stock units acquired as a result of an election to receive quarterly director cash fees in equity."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F8","text":"This reflects deferred stock units acquired as a result of an election to receive quarterly director cash fees in equity."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001556313-17-000014","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000014/primary_doc.xml","form_type":"4/A","original_submission_date":"2017-10-04"}},{"id":4193160,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-10-04T13:19:39.000Z","date":"2017-09-29","kind":"grant","acquired":true,"shares":549,"price":22.75,"value":12489.75,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\")."},{"field":"security","element":"securityTitle","label":"F2","text":"As of the transaction date set forth above, each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F8","text":"2017 Director Equity Award; Includes 549 shares of deferred stock units."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F8","text":"2017 Director Equity Award; Includes 549 shares of deferred stock units."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001556313-17-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000013/primary_doc.xml","form_type":"4"}},{"id":4269748,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. 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I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"2017 Director Equity Award; Includes 582 shares of deferred stock units."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"2017 Director Equity Award; Includes 582 shares of deferred stock units."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001556313-17-000012","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000012/primary_doc.xml","form_type":"4"}},{"id":4304023,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. 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I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"2017 Director Equity Award; Includes 4,035 shares of deferred stock units."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"2017 Director Equity Award; Includes 4,035 shares of deferred stock units."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001556313-17-000010","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000010/primary_doc.xml","form_type":"4"}},{"id":4327385,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. 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I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Represents a transfer of shares of common stock to an affiliated entity."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001556313-17-000009","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000009/primary_doc.xml","form_type":"4"}},{"id":4327384,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. 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I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Represents a transfer of shares of common stock to an affiliated entity."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Legion Partners Asset Management directly owns these shares of Common Stock. Legion Partners Holdings is the sole member of Legion Partners Asset Management and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Asset Management."}],"balance_after":11398,"source":{"system":"sec-edgar","filing":"0001556313-17-000009","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000009/primary_doc.xml","form_type":"4"}},{"id":4356469,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. 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II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":333617,"source":{"system":"sec-edgar","filing":"0001556313-17-000008","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000008/primary_doc.xml","form_type":"4"}},{"id":4356468,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. 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II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":326738,"source":{"system":"sec-edgar","filing":"0001556313-17-000008","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000008/primary_doc.xml","form_type":"4"}},{"id":4356467,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-04-07T21:33:16.000Z","date":"2017-04-05","kind":"purchase","acquired":true,"shares":3956,"price":12.58,"value":49766.48,"ownership":{"direct":false,"nature":"Legion Partners Special Opportunities L.P. II"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"Legion Partners Special II directly owns these shares of Common Stock. General Partner is the general partner of Legion Partners Special II, Legion Partners Asset Management is the investment advisor of Legion Partners Special II, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Special II."}],"balance_after":322817,"source":{"system":"sec-edgar","filing":"0001556313-17-000008","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000008/primary_doc.xml","form_type":"4"}},{"id":4356466,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-04-07T21:33:16.000Z","date":"2017-04-07","kind":"purchase","acquired":true,"shares":26451,"price":13.33,"value":352591.83,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1141750,"source":{"system":"sec-edgar","filing":"0001556313-17-000008","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000008/primary_doc.xml","form_type":"4"}},{"id":4356465,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-04-07T21:33:16.000Z","date":"2017-04-06","kind":"purchase","acquired":true,"shares":15079,"price":12.93,"value":194971.47,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1115299,"source":{"system":"sec-edgar","filing":"0001556313-17-000008","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000008/primary_doc.xml","form_type":"4"}},{"id":4356464,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-04-07T21:33:16.000Z","date":"2017-04-05","kind":"purchase","acquired":true,"shares":15211,"price":12.58,"value":191354.38,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1100220,"source":{"system":"sec-edgar","filing":"0001556313-17-000008","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000008/primary_doc.xml","form_type":"4"}},{"id":4363641,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-04-04T17:55:48.000Z","date":"2017-03-31","kind":"grant","acquired":true,"shares":1063,"price":12.93,"value":13744.59,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Represents quarterly director cash retainer fees elected to be paid in stock."}],"balance_after":1063,"source":{"system":"sec-edgar","filing":"0001556313-17-000007","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000007/primary_doc.xml","form_type":"4"}},{"id":4367570,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-31T21:30:35.000Z","date":"2017-03-31","kind":"purchase","acquired":true,"shares":18000,"price":12.88,"value":231840.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1085009,"source":{"system":"sec-edgar","filing":"0001556313-17-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000006/primary_doc.xml","form_type":"4"}},{"id":4367569,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-31T21:30:35.000Z","date":"2017-03-30","kind":"purchase","acquired":true,"shares":25500,"price":13.07,"value":333285.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1067009,"source":{"system":"sec-edgar","filing":"0001556313-17-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000006/primary_doc.xml","form_type":"4"}},{"id":4367568,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-31T21:30:35.000Z","date":"2017-03-29","kind":"purchase","acquired":true,"shares":28801,"price":12.27,"value":353388.27,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1041509,"source":{"system":"sec-edgar","filing":"0001556313-17-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000006/primary_doc.xml","form_type":"4"}},{"id":4373154,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-24T20:57:14.000Z","date":"2017-03-24","kind":"purchase","acquired":true,"shares":9846,"price":12.67,"value":124748.82,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1012708,"source":{"system":"sec-edgar","filing":"0001556313-17-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000005/primary_doc.xml","form_type":"4"}},{"id":4373153,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-24T20:57:14.000Z","date":"2017-03-23","kind":"purchase","acquired":true,"shares":4323,"price":12.71,"value":54945.33,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":1002862,"source":{"system":"sec-edgar","filing":"0001556313-17-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000005/primary_doc.xml","form_type":"4"}},{"id":4373152,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-24T20:57:14.000Z","date":"2017-03-22","kind":"purchase","acquired":true,"shares":12747,"price":12.65,"value":161249.55,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":998539,"source":{"system":"sec-edgar","filing":"0001556313-17-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000005/primary_doc.xml","form_type":"4"}},{"id":4381330,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-17T21:15:25.000Z","date":"2017-03-17","kind":"purchase","acquired":true,"shares":34000,"price":13.06,"value":444040.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017.  Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":985792,"source":{"system":"sec-edgar","filing":"0001556313-17-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000004/primary_doc.xml","form_type":"4"}},{"id":4381329,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-17T21:15:25.000Z","date":"2017-03-16","kind":"purchase","acquired":true,"shares":22812,"price":13.21,"value":301346.52,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017.  Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":951792,"source":{"system":"sec-edgar","filing":"0001556313-17-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000004/primary_doc.xml","form_type":"4"}},{"id":4381328,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-17T21:15:25.000Z","date":"2017-03-15","kind":"purchase","acquired":true,"shares":4500,"price":13.38,"value":60210.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on March 14, 2017.  Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":928980,"source":{"system":"sec-edgar","filing":"0001556313-17-000004","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000004/primary_doc.xml","form_type":"4"}},{"id":4393756,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-09T22:56:14.000Z","date":"2017-03-09","kind":"other","acquired":false,"shares":1011,"price":13.6,"value":13749.6,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Represents a transfer of shares of common stock to an affiliated entity."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001556313-17-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000003/primary_doc.xml","form_type":"4"}},{"id":4393755,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-09T22:56:14.000Z","date":"2017-03-09","kind":"grant","acquired":true,"shares":1011,"price":13.6,"value":13749.6,"ownership":{"direct":false,"nature":"Legion Partners Asset Management, LLC"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Represents a transfer of shares of common stock to an affiliated entity."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Legion Partners Asset Management directly owns these shares of Common Stock. Legion Partners Holdings is the sole member of Legion Partners Asset Management and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Asset Management."}],"balance_after":10335,"source":{"system":"sec-edgar","filing":"0001556313-17-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000003/primary_doc.xml","form_type":"4"}},{"id":4393754,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-09T22:56:14.000Z","date":"2017-03-09","kind":"purchase","acquired":true,"shares":9553,"price":13.94,"value":133168.82,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":924480,"source":{"system":"sec-edgar","filing":"0001556313-17-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000003/primary_doc.xml","form_type":"4"}},{"id":4393753,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-09T22:56:14.000Z","date":"2017-03-08","kind":"purchase","acquired":true,"shares":16243,"price":13.78,"value":223828.54,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":914927,"source":{"system":"sec-edgar","filing":"0001556313-17-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000003/primary_doc.xml","form_type":"4"}},{"id":4393752,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-03-09T22:56:14.000Z","date":"2017-03-07","kind":"purchase","acquired":true,"shares":18312,"price":13.74,"value":251606.88,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":898684,"source":{"system":"sec-edgar","filing":"0001556313-17-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000003/primary_doc.xml","form_type":"4"}},{"id":4505741,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. 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II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-01-04T17:16:03.000Z","date":"2016-12-31","kind":"grant","acquired":true,"shares":1011,"price":13.6,"value":13749.6,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Represents quarterly director cash retainer fees elected to be paid in stock."}],"balance_after":1011,"source":{"system":"sec-edgar","filing":"0001556313-17-000001","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631317000001/primary_doc.xml","form_type":"4"}},{"id":4549595,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-11-18T21:45:25.000Z","date":"2016-11-18","kind":"purchase","acquired":true,"shares":6425,"price":11.97,"value":76907.25,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":880372,"source":{"system":"sec-edgar","filing":"0001556313-16-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631316000003/primary_doc.xml","form_type":"4"}},{"id":4549594,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":5,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":6,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-11-18T21:45:25.000Z","date":"2016-11-17","kind":"purchase","acquired":true,"shares":5900,"price":12,"value":70800.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":873947,"source":{"system":"sec-edgar","filing":"0001556313-16-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631316000003/primary_doc.xml","form_type":"4"}},{"id":4549593,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. 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I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F6","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":868047,"source":{"system":"sec-edgar","filing":"0001556313-16-000003","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000155631316000003/primary_doc.xml","form_type":"4"}},{"id":4556495,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. 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I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Represents a transfer of shares of Common Stock to an affiliated entity."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Represents a transfer of shares of Common Stock to an affiliated entity."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"Legion Partners Asset Management directly owns these shares of Common Stock. Legion Partners Holdings is the sole member of Legion Partners Asset Management and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners Asset Management."}],"balance_after":9324,"source":{"system":"sec-edgar","filing":"0001560207-16-000022","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020716000022/primary_doc.xml","form_type":"4"}},{"id":4556494,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-11-15T17:42:00.000Z","date":"2016-11-14","kind":"other","acquired":false,"shares":1145,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Represents a transfer of shares of Common Stock to an affiliated entity."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Represents a transfer of shares of Common Stock to an affiliated entity."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001560207-16-000022","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020716000022/primary_doc.xml","form_type":"4"}},{"id":4559480,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-11-14T17:59:06.000Z","date":"2016-11-11","kind":"purchase","acquired":true,"shares":9763,"price":11.18,"value":109150.34,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned\nby Legion Partners I."}],"balance_after":867147,"source":{"system":"sec-edgar","filing":"0001560207-16-000021","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020716000021/primary_doc.xml","form_type":"4"}},{"id":4559479,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-11-14T17:59:06.000Z","date":"2016-11-10","kind":"purchase","acquired":true,"shares":22563,"price":11.35,"value":256090.05,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned\nby Legion Partners I."}],"balance_after":857384,"source":{"system":"sec-edgar","filing":"0001560207-16-000021","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020716000021/primary_doc.xml","form_type":"4"}},{"id":4559478,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-11-14T17:59:06.000Z","date":"2016-11-09","kind":"purchase","acquired":true,"shares":20215,"price":10.81,"value":218524.15,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F7","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the\ntiming of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned\nby Legion Partners I."}],"balance_after":834821,"source":{"system":"sec-edgar","filing":"0001560207-16-000021","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020716000021/primary_doc.xml","form_type":"4"}},{"id":4577915,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-10-19T19:23:13.000Z","date":"2016-09-30","kind":"grant","acquired":true,"shares":1145,"price":12.01,"value":13751.45,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Represents quarterly director cash retainer fees elected to be paid in stock."}],"balance_after":1145,"source":{"system":"sec-edgar","filing":"0001595909-16-000007","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000159590916000007/primary_doc.xml","form_type":"4/A","original_submission_date":"2016-10-04"}},{"id":4579889,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-10-14T21:31:55.000Z","date":"2016-10-14","kind":"purchase","acquired":true,"shares":5339,"price":11.98,"value":63961.22,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F3","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":814606,"source":{"system":"sec-edgar","filing":"0001595909-16-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000159590916000006/primary_doc.xml","form_type":"4"}},{"id":4579888,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-10-14T21:31:55.000Z","date":"2016-10-13","kind":"purchase","acquired":true,"shares":7559,"price":11.99,"value":90632.41,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F3","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":809267,"source":{"system":"sec-edgar","filing":"0001595909-16-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/352825/000159590916000006/primary_doc.xml","form_type":"4"}},{"id":4579887,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-10-14T21:31:55.000Z","date":"2016-10-12","kind":"purchase","acquired":true,"shares":499,"price":12,"value":5988.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose."},{"field":"shares","element":"transactionShares","label":"F3","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":801708,"source":{"system":"sec-edgar","filing":"0001595909-16-000006","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000159590916000006/primary_doc.xml","form_type":"4"}},{"id":4588837,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-10-04T20:51:25.000Z","date":"2016-09-30","kind":"purchase","acquired":true,"shares":1145,"price":12.01,"value":13751.45,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Represents quarterly director cash retainer fees elected to be paid in stock."}],"balance_after":1145,"source":{"system":"sec-edgar","filing":"0001560207-16-000016","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020716000016/primary_doc.xml","form_type":"4"}},{"id":4592367,"issuer":{"id":5689,"kind":"organization","name":"FOSTER L B CO"},"owners":[{"id":22597,"kind":"person","name":"Vizi Bradley","position":1,"cik":"0001556313","reported_name":"Vizi Bradley","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37300,"kind":"person","name":"Legion Partners, L.P. I","position":2,"cik":"0001595909","reported_name":"Legion Partners, L.P. I","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37301,"kind":"person","name":"Legion Partners, L.P. II","position":3,"cik":"0001618783","reported_name":"Legion Partners, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":164295,"kind":"organization","name":"Legion Partners Special Opportunities, L.P. II","position":4,"cik":"0001661189","reported_name":"Legion Partners Special Opportunities, L.P. II","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37303,"kind":"person","name":"Legion Partners, LLC","position":5,"cik":"0001682390","reported_name":"Legion Partners, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37299,"kind":"person","name":"Legion Partners Asset Management, LLC","position":6,"cik":"0001560207","reported_name":"Legion Partners Asset Management, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37304,"kind":"person","name":"Legion Partners Holdings, LLC","position":7,"cik":"0001682389","reported_name":"Legion Partners Holdings, LLC","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37305,"kind":"person","name":"Kiper Christopher S","position":8,"cik":"0001432744","reported_name":"Kiper Christopher S","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37298,"kind":"person","name":"White Raymond T.","position":9,"cik":"0001682494","reported_name":"White Raymond T.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2016-09-30T21:21:55.000Z","date":"2016-09-30","kind":"purchase","acquired":true,"shares":14419,"price":12,"value":173028.0,"ownership":{"direct":false,"nature":"Legion Partners, L.P. I"},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"This Form 4 is filed jointly by Legion Partners, L.P. I (\"Legion Partners I\"), Legion Partners, L.P. II (\"Legion Partners II\"), Legion Partners Special Opportunities, L.P. II (\"Legion Partners Special II\"), Legion Partners, LLC (\"General Partner\"), Legion Partners Asset Management, LLC (\"Legion Partners Asset Management\"), Legion Partners Holdings, LLC (\"Legion Partners Holdings\"), Bradley S. Vizi, Christopher S. Kiper and Raymond T. White (collectively, the \"Reporting Persons\"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other\npurpose."},{"field":"shares","element":"transactionShares","label":"F3","text":"The transactions reported were effected pursuant to a Rule 10b5-1 plan adopted by the Reporting Persons on August 18, 2016. Accordingly, the Reporting Persons had no discretion with regard to the timing of the transactions."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Legion Partners I directly owns these shares of common stock (\"Common Stock\") of L.B. Foster Company (the \"Issuer\"). General Partner is the general partner of Legion Partners I, Legion Partners Asset Management is the investment advisor of Legion Partners I, Legion Partners Holdings is the sole member of Legion Partners Asset Management and managing member of General Partner, and each of Messrs. Vizi, Kiper and White are managing directors of Legion Partners Asset Management and managing members of Legion Partners Holdings. As a result of these relationships, General Partner, Legion Partners Asset Management, Legion Partners Holdings and Messrs. Vizi, Kiper and White may be deemed to have shared voting and dispositive power over the Common Stock owned by Legion Partners I."}],"balance_after":801209,"source":{"system":"sec-edgar","filing":"0001560207-16-000013","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/352825/000156020716000013/primary_doc.xml","form_type":"4"}}],"next_cursor":"2016-09-30T21:21:55.000000Z,4592367"}