{"transactions":[{"id":1515920,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-15T20:29:09.000Z","date":"2024-05-13","kind":"sale","planned":false,"acquired":false,"shares":4000,"price":51.2841,"value":205136.4,"ownership":{"direct":true},"balance_after":29329,"source":{"system":"sec-edgar","filing":"0001628280-24-023581","document":"wk-form4_1715804931.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024023581/wk-form4_1715804931.xml","form_type":"4"}},{"id":1531943,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-01T20:19:38.000Z","date":"2024-04-29","kind":"gift","planned":false,"acquired":false,"shares":4000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents a bona fide gift of shares of the Company's common stock for which no payment or consideration was received by the Reporting Person."}],"balance_after":33329,"source":{"system":"sec-edgar","filing":"0001628280-24-019625","document":"wk-form4_1714594768.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024019625/wk-form4_1714594768.xml","form_type":"4"}},{"id":1692355,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-01-03T23:23:12.000Z","date":"2024-01-01","kind":"grant","planned":false,"acquired":true,"shares":1914,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025."}],"balance_after":1914,"derivative":{"underlying":"Common Stock","underlying_shares":1914},"source":{"system":"sec-edgar","filing":"0001628280-24-000297","document":"wk-form4_1704324183.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024000297/wk-form4_1704324183.xml","form_type":"4"}},{"id":1692354,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-01-03T23:23:12.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":false,"shares":6906,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":6906},"source":{"system":"sec-edgar","filing":"0001628280-24-000297","document":"wk-form4_1704324183.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024000297/wk-form4_1704324183.xml","form_type":"4"}},{"id":1692353,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2024-01-03T23:23:12.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":false,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date."}],"balance_after":6906,"derivative":{"underlying":"Common Stock","underlying_shares":1067},"source":{"system":"sec-edgar","filing":"0001628280-24-000297","document":"wk-form4_1704324183.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024000297/wk-form4_1704324183.xml","form_type":"4"}},{"id":1692352,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-01-03T23:23:12.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":true,"shares":6906,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":37329,"source":{"system":"sec-edgar","filing":"0001628280-24-000297","document":"wk-form4_1704324183.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024000297/wk-form4_1704324183.xml","form_type":"4"}},{"id":1692351,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-01-03T23:23:12.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":true,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":30423,"source":{"system":"sec-edgar","filing":"0001628280-24-000297","document":"wk-form4_1704324183.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024000297/wk-form4_1704324183.xml","form_type":"4"}},{"id":1775406,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-09-21T20:12:51.000Z","date":"2023-09-20","kind":"gift","planned":false,"acquired":false,"shares":8000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents a bona fide gift of shares of the Company's common stock for which no payment or consideration was received by the Reporting Person."}],"balance_after":29356,"source":{"system":"sec-edgar","filing":"0001628280-23-032775","document":"wk-form4_1695327162.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023032775/wk-form4_1695327162.xml","form_type":"4"}},{"id":1830927,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"$12.50 Merger Warrants","published_at":"2023-07-12T20:47:22.000Z","date":"2023-07-11","kind":"other","planned":false,"acquired":false,"shares":3308,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":12.5,"exercise_date":"2017-07-20","expiration_date":"2023-07-20","underlying":"Common Stock","underlying_shares":3308},"source":{"system":"sec-edgar","filing":"0001628280-23-024801","document":"wk-form4_1689194834.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023024801/wk-form4_1689194834.xml","form_type":"4"}},{"id":1830926,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-07-12T20:47:22.000Z","date":"2023-07-11","kind":"sale","planned":false,"acquired":false,"shares":1661,"price":24.908,"value":41372.188,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On July 11, 2023, the Reporting Person exercised a warrant to purchase 3,308 shares of the Limbach Holdings, Inc. (the \"Company\") Common Stock for $12.50 per share. The Reporting Person paid the exercise price on a cashless basis, resulting in the issuer's withholding of 1,661 of the warrant shares to pay the exercise price and issuing to the Reporting Person the remaining 1,647 shares."}],"balance_after":37356,"source":{"system":"sec-edgar","filing":"0001628280-23-024801","document":"wk-form4_1689194834.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023024801/wk-form4_1689194834.xml","form_type":"4"}},{"id":1830925,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-07-12T20:47:22.000Z","date":"2023-07-11","kind":"other","planned":false,"acquired":true,"shares":3308,"price":12.5,"value":41350.0,"ownership":{"direct":true},"balance_after":39017,"source":{"system":"sec-edgar","filing":"0001628280-23-024801","document":"wk-form4_1689194834.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023024801/wk-form4_1689194834.xml","form_type":"4"}},{"id":2067571,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-01-04T23:15:46.000Z","date":"2023-01-04","kind":"grant","acquired":true,"shares":6906,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This award of RSUs was granted on 01/04/2023. The RSUs are scheduled to cliff vest on January 1, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This award of RSUs was granted on 01/04/2023. The RSUs are scheduled to cliff vest on January 1, 2024."}],"balance_after":7973,"derivative":{"underlying":"Common Stock","underlying_shares":6906},"source":{"system":"sec-edgar","filing":"0001628280-23-000308","document":"wf-form4_167287410616422.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023000308/wf-form4_167287410616422.xml","form_type":"4"}},{"id":2067570,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-01-04T23:15:46.000Z","date":"2023-01-01","kind":"exercise","acquired":false,"shares":8876,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023."}],"balance_after":1067,"derivative":{"underlying":"Common Stock","underlying_shares":8876},"source":{"system":"sec-edgar","filing":"0001628280-23-000308","document":"wf-form4_167287410616422.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023000308/wf-form4_167287410616422.xml","form_type":"4"}},{"id":2067569,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-01-04T23:15:46.000Z","date":"2023-01-01","kind":"exercise","acquired":false,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date."}],"balance_after":9943,"derivative":{"underlying":"Common Stock","underlying_shares":1067},"source":{"system":"sec-edgar","filing":"0001628280-23-000308","document":"wf-form4_167287410616422.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023000308/wf-form4_167287410616422.xml","form_type":"4"}},{"id":2067568,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2023-01-04T23:15:46.000Z","date":"2023-01-01","kind":"exercise","acquired":false,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date."}],"balance_after":11010,"derivative":{"underlying":"Common Stock","underlying_shares":1067},"source":{"system":"sec-edgar","filing":"0001628280-23-000308","document":"wf-form4_167287410616422.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023000308/wf-form4_167287410616422.xml","form_type":"4"}},{"id":2067567,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-01-04T23:15:46.000Z","date":"2023-01-01","kind":"exercise","acquired":true,"shares":8876,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":35709,"source":{"system":"sec-edgar","filing":"0001628280-23-000308","document":"wf-form4_167287410616422.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023000308/wf-form4_167287410616422.xml","form_type":"4"}},{"id":2067566,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-01-04T23:15:46.000Z","date":"2023-01-01","kind":"exercise","acquired":true,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":26833,"source":{"system":"sec-edgar","filing":"0001628280-23-000308","document":"wf-form4_167287410616422.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023000308/wf-form4_167287410616422.xml","form_type":"4"}},{"id":2067565,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-01-04T23:15:46.000Z","date":"2023-01-01","kind":"exercise","acquired":true,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":25766,"source":{"system":"sec-edgar","filing":"0001628280-23-000308","document":"wf-form4_167287410616422.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828023000308/wf-form4_167287410616422.xml","form_type":"4"}},{"id":2314188,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-03-30T18:44:36.000Z","date":"2022-03-29","kind":"purchase","acquired":true,"shares":1000,"price":7.02,"value":7020.0,"ownership":{"direct":true},"balance_after":24699,"source":{"system":"sec-edgar","filing":"0001628280-22-007841","document":"wf-form4_164866586061199.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828022007841/wf-form4_164866586061199.xml","form_type":"4"}},{"id":2449169,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2022-01-04T22:54:55.000Z","date":"2022-01-01","kind":"grant","acquired":true,"shares":8876,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023."}],"balance_after":12077,"derivative":{"underlying":"Common Stock","underlying_shares":8876},"source":{"system":"sec-edgar","filing":"0001628280-22-000227","document":"wf-form4_164133685655968.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828022000227/wf-form4_164133685655968.xml","form_type":"4"}},{"id":2449168,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2022-01-04T22:54:55.000Z","date":"2022-01-01","kind":"exercise","acquired":false,"shares":1066,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date."}],"balance_after":3201,"derivative":{"underlying":"Common Stock","underlying_shares":1066},"source":{"system":"sec-edgar","filing":"0001628280-22-000227","document":"wf-form4_164133685655968.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828022000227/wf-form4_164133685655968.xml","form_type":"4"}},{"id":2449167,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2022-01-04T22:54:55.000Z","date":"2022-01-01","kind":"exercise","acquired":false,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date."}],"balance_after":4267,"derivative":{"underlying":"Common Stock","underlying_shares":1067},"source":{"system":"sec-edgar","filing":"0001628280-22-000227","document":"wf-form4_164133685655968.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828022000227/wf-form4_164133685655968.xml","form_type":"4"}},{"id":2449166,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2022-01-04T22:54:55.000Z","date":"2022-01-01","kind":"exercise","acquired":false,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."}],"balance_after":5334,"derivative":{"underlying":"Common Stock","underlying_shares":1067},"source":{"system":"sec-edgar","filing":"0001628280-22-000227","document":"wf-form4_164133685655968.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828022000227/wf-form4_164133685655968.xml","form_type":"4"}},{"id":2449165,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-01-04T22:54:55.000Z","date":"2022-01-01","kind":"exercise","acquired":true,"shares":1066,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":23699,"source":{"system":"sec-edgar","filing":"0001628280-22-000227","document":"wf-form4_164133685655968.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828022000227/wf-form4_164133685655968.xml","form_type":"4"}},{"id":2449164,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-01-04T22:54:55.000Z","date":"2022-01-01","kind":"exercise","acquired":true,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":22633,"source":{"system":"sec-edgar","filing":"0001628280-22-000227","document":"wf-form4_164133685655968.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828022000227/wf-form4_164133685655968.xml","form_type":"4"}},{"id":2449163,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-01-04T22:54:55.000Z","date":"2022-01-01","kind":"exercise","acquired":true,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":21566,"source":{"system":"sec-edgar","filing":"0001628280-22-000227","document":"wf-form4_164133685655968.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828022000227/wf-form4_164133685655968.xml","form_type":"4"}},{"id":2920494,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2021-01-05T21:46:05.000Z","date":"2021-01-01","kind":"grant","acquired":true,"shares":3200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date."}],"balance_after":6401,"derivative":{"underlying":"Common Stock","underlying_shares":3200},"source":{"system":"sec-edgar","filing":"0001628280-21-000073","document":"wf-form4_160988315033803.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828021000073/wf-form4_160988315033803.xml","form_type":"4"}},{"id":2920493,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2021-01-05T21:46:05.000Z","date":"2021-01-01","kind":"exercise","acquired":false,"shares":1066,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date."}],"balance_after":3201,"derivative":{"underlying":"Common Stock","underlying_shares":1066},"source":{"system":"sec-edgar","filing":"0001628280-21-000073","document":"wf-form4_160988315033803.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828021000073/wf-form4_160988315033803.xml","form_type":"4"}},{"id":2920492,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2021-01-05T21:46:05.000Z","date":"2021-01-01","kind":"exercise","acquired":false,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."}],"balance_after":4267,"derivative":{"underlying":"Common Stock","underlying_shares":1067},"source":{"system":"sec-edgar","filing":"0001628280-21-000073","document":"wf-form4_160988315033803.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828021000073/wf-form4_160988315033803.xml","form_type":"4"}},{"id":2920491,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2021-01-05T21:46:05.000Z","date":"2021-01-01","kind":"exercise","acquired":false,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date."}],"balance_after":5334,"derivative":{"underlying":"Common Stock","underlying_shares":1067},"source":{"system":"sec-edgar","filing":"0001628280-21-000073","document":"wf-form4_160988315033803.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828021000073/wf-form4_160988315033803.xml","form_type":"4"}},{"id":2920490,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-01-05T21:46:05.000Z","date":"2021-01-01","kind":"exercise","acquired":true,"shares":1066,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":20499,"source":{"system":"sec-edgar","filing":"0001628280-21-000073","document":"wf-form4_160988315033803.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828021000073/wf-form4_160988315033803.xml","form_type":"4"}},{"id":2920489,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-01-05T21:46:05.000Z","date":"2021-01-01","kind":"exercise","acquired":true,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":19433,"source":{"system":"sec-edgar","filing":"0001628280-21-000073","document":"wf-form4_160988315033803.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828021000073/wf-form4_160988315033803.xml","form_type":"4"}},{"id":2920488,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-01-05T21:46:05.000Z","date":"2021-01-01","kind":"exercise","acquired":true,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":18366,"source":{"system":"sec-edgar","filing":"0001628280-21-000073","document":"wf-form4_160988315033803.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828021000073/wf-form4_160988315033803.xml","form_type":"4"}},{"id":3323143,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2020-01-03T22:23:49.000Z","date":"2020-01-01","kind":"grant","acquired":true,"shares":3200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date."}],"balance_after":6401,"derivative":{"underlying":"Common Stock","underlying_shares":3200},"source":{"system":"sec-edgar","filing":"0001104659-20-000985","document":"tm1928451d4_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000110465920000985/tm1928451d4_4.xml","form_type":"4"}},{"id":3323142,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2020-01-03T22:23:49.000Z","date":"2020-01-01","kind":"exercise","acquired":false,"shares":1066,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."}],"balance_after":3201,"derivative":{"underlying":"Common Stock","underlying_shares":1066},"source":{"system":"sec-edgar","filing":"0001104659-20-000985","document":"tm1928451d4_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000110465920000985/tm1928451d4_4.xml","form_type":"4"}},{"id":3323141,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2020-01-03T22:23:49.000Z","date":"2020-01-01","kind":"exercise","acquired":false,"shares":1067,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date."}],"balance_after":4267,"derivative":{"underlying":"Common Stock","underlying_shares":1067},"source":{"system":"sec-edgar","filing":"0001104659-20-000985","document":"tm1928451d4_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000110465920000985/tm1928451d4_4.xml","form_type":"4"}},{"id":3323140,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2020-01-03T22:23:49.000Z","date":"2020-01-01","kind":"exercise","acquired":false,"shares":1068,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 08/30/2017. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2018, January 1, 2019 and January 1, 2020, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 08/30/2017. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2018, January 1, 2019 and January 1, 2020, subject to continued service through the applicable vesting date."}],"balance_after":5334,"derivative":{"underlying":"Common Stock","underlying_shares":1068},"source":{"system":"sec-edgar","filing":"0001104659-20-000985","document":"tm1928451d4_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000110465920000985/tm1928451d4_4.xml","form_type":"4"}},{"id":3323139,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-01-03T22:23:49.000Z","date":"2020-01-01","kind":"exercise","acquired":true,"shares":1066,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."}],"balance_after":17299,"source":{"system":"sec-edgar","filing":"0001104659-20-000985","document":"tm1928451d4_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000110465920000985/tm1928451d4_4.xml","form_type":"4"}},{"id":3323138,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-01-03T22:23:49.000Z","date":"2020-01-01","kind":"exercise","acquired":true,"shares":1067,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."}],"balance_after":16233,"source":{"system":"sec-edgar","filing":"0001104659-20-000985","document":"tm1928451d4_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000110465920000985/tm1928451d4_4.xml","form_type":"4"}},{"id":3323137,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-01-03T22:23:49.000Z","date":"2020-01-01","kind":"exercise","acquired":true,"shares":1068,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."}],"balance_after":15166,"source":{"system":"sec-edgar","filing":"0001104659-20-000985","document":"tm1928451d4_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000110465920000985/tm1928451d4_4.xml","form_type":"4"}},{"id":3623190,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2019-03-02T02:34:56.000Z","date":"2019-02-27","kind":"grant","acquired":true,"shares":3200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."}],"balance_after":6402,"derivative":{"underlying":"Common Stock","underlying_shares":3200},"source":{"system":"sec-edgar","filing":"0001144204-19-011771","document":"tv515306_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000114420419011771/tv515306_4.xml","form_type":"4"}},{"id":3708958,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2019-01-03T22:08:20.000Z","date":"2019-01-01","kind":"exercise","acquired":false,"shares":1066,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date."}],"balance_after":3200,"derivative":{"underlying":"Common Stock","underlying_shares":1066},"source":{"system":"sec-edgar","filing":"0001144204-19-000444","document":"tv510350_form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000114420419000444/tv510350_form4.xml","form_type":"4"}},{"id":3708957,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2019-01-03T22:08:20.000Z","date":"2019-01-01","kind":"exercise","acquired":false,"shares":1066,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 08/30/2017. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2018, January 1, 2019 and January 1, 2020, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 08/30/2017. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2018, January 1, 2019 and January 1, 2020, subject to continued service through the applicable vesting date."}],"balance_after":4268,"derivative":{"underlying":"Common Stock","underlying_shares":1066},"source":{"system":"sec-edgar","filing":"0001144204-19-000444","document":"tv510350_form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000114420419000444/tv510350_form4.xml","form_type":"4"}},{"id":3708956,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-01-03T22:08:20.000Z","date":"2019-01-01","kind":"exercise","acquired":true,"shares":1066,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."}],"balance_after":14098,"source":{"system":"sec-edgar","filing":"0001144204-19-000444","document":"tv510350_form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000114420419000444/tv510350_form4.xml","form_type":"4"}},{"id":3708955,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-01-03T22:08:20.000Z","date":"2019-01-01","kind":"exercise","acquired":true,"shares":1066,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."}],"balance_after":13032,"source":{"system":"sec-edgar","filing":"0001144204-19-000444","document":"tv510350_form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000114420419000444/tv510350_form4.xml","form_type":"4"}},{"id":3809843,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2018-09-21T22:32:32.000Z","date":"2018-04-13","kind":"grant","acquired":true,"shares":3200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date."}],"balance_after":3200,"derivative":{"underlying":"Common Stock","underlying_shares":3200},"source":{"system":"sec-edgar","filing":"0001144204-18-050423","document":"tv496105_form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000114420418050423/tv496105_form4.xml","form_type":"4"}},{"id":3910799,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2018-06-01T22:54:48.000Z","date":"2018-01-01","kind":"exercise","acquired":false,"shares":1066,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 08/30/2017. The remaining RSUs vest equally on January 1, 2019 and January 1, 2020, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 08/30/2017. The remaining RSUs vest equally on January 1, 2019 and January 1, 2020, subject to continued service through the applicable vesting date."}],"balance_after":2134,"derivative":{"underlying":"Common Stock","underlying_shares":1066},"source":{"system":"sec-edgar","filing":"0001144204-18-032501","document":"tv495736_form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000114420418032501/tv495736_form4.xml","form_type":"4"}},{"id":3910798,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":91036,"kind":"person","name":"Young Norbert W.","position":1,"cik":"0001679800","reported_name":"Young Norbert W.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-06-01T22:54:48.000Z","date":"2018-01-01","kind":"exercise","acquired":true,"shares":1066,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."}],"balance_after":11966,"source":{"system":"sec-edgar","filing":"0001144204-18-032501","document":"tv495736_form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000114420418032501/tv495736_form4.xml","form_type":"4"}}]}