{"transactions":[{"id":773522,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2026-05-19T19:37:54.000Z","date":"2026-05-19","kind":"sale","planned":false,"acquired":false,"shares":1672,"price":58.6496,"value":98062.1312,"ownership":{"direct":true},"balance_after":2288,"source":{"system":"sec-edgar","filing":"0000851520-26-000074","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152026000074/edgardoc.xml","form_type":"4"}},{"id":842870,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2026-03-16T20:20:21.000Z","date":"2026-03-13","kind":"grant","planned":false,"acquired":true,"shares":2970,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":2970,"derivative":{"exercise_date":"2030-03-13","expiration_date":"2030-03-13","underlying":"Common Stock","underlying_shares":2970},"source":{"system":"sec-edgar","filing":"0000851520-26-000049","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152026000049/edgardoc.xml","form_type":"4"}},{"id":844842,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2026-03-13T21:24:42.000Z","date":"2026-03-11","kind":"exercise","planned":false,"acquired":false,"shares":2120,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 11, 2022 into shares of Common Stock on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 11, 2022 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2026-03-11","expiration_date":"2026-03-11","underlying":"Common Stock","underlying_shares":2120},"source":{"system":"sec-edgar","filing":"0000851520-26-000034","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152026000034/edgardoc.xml","form_type":"4"}},{"id":844841,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2026-03-13T21:24:42.000Z","date":"2026-03-11","kind":"tax_withholding","planned":false,"acquired":false,"shares":958,"price":70.03,"value":67088.74,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":3960,"source":{"system":"sec-edgar","filing":"0000851520-26-000034","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152026000034/edgardoc.xml","form_type":"4"}},{"id":844840,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2026-03-13T21:24:42.000Z","date":"2026-03-11","kind":"exercise","planned":false,"acquired":true,"shares":2120,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 11, 2022 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":4918,"source":{"system":"sec-edgar","filing":"0000851520-26-000034","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152026000034/edgardoc.xml","form_type":"4"}},{"id":1204989,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2025-03-18T01:14:55.000Z","date":"2025-03-14","kind":"grant","planned":false,"acquired":true,"shares":2032,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":2032,"derivative":{"exercise_date":"2029-03-14","expiration_date":"2029-03-14","underlying":"Common Stock","underlying_shares":2032},"source":{"system":"sec-edgar","filing":"0000851520-25-000042","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152025000042/edgardoc.xml","form_type":"4"}},{"id":1206894,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2025-03-15T00:55:50.000Z","date":"2025-03-12","kind":"exercise","planned":false,"acquired":false,"shares":1822,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 12, 2021 into shares of Common Stock on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 12, 2021 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2025-03-12","expiration_date":"2025-03-12","underlying":"Common Stock","underlying_shares":1822},"source":{"system":"sec-edgar","filing":"0000851520-25-000024","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152025000024/edgardoc.xml","form_type":"4"}},{"id":1206893,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2025-03-15T00:55:50.000Z","date":"2025-03-12","kind":"tax_withholding","planned":false,"acquired":false,"shares":824,"price":82.33,"value":67839.92,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":2798,"source":{"system":"sec-edgar","filing":"0000851520-25-000024","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152025000024/edgardoc.xml","form_type":"4"}},{"id":1206892,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2025-03-15T00:55:50.000Z","date":"2025-03-12","kind":"exercise","planned":false,"acquired":true,"shares":1822,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 12, 2021 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":3622,"source":{"system":"sec-edgar","filing":"0000851520-25-000024","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152025000024/edgardoc.xml","form_type":"4"}},{"id":1241857,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2025-02-27T15:54:51.000Z","date":"2025-02-26","kind":"sale","planned":false,"acquired":false,"shares":1736,"price":85.9303,"value":149175.0008,"ownership":{"direct":true},"balance_after":1800,"source":{"system":"sec-edgar","filing":"0000851520-25-000015","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152025000015/edgardoc.xml","form_type":"4"}},{"id":1444741,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2024-08-01T14:54:33.000Z","date":"2024-07-31","kind":"sale","planned":false,"acquired":false,"shares":2206,"price":107.4585,"value":237053.451,"ownership":{"direct":true},"balance_after":3536,"source":{"system":"sec-edgar","filing":"0000851520-24-000110","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152024000110/edgardoc.xml","form_type":"4"}},{"id":1571006,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2024-03-20T00:27:32.000Z","date":"2024-03-15","kind":"grant","planned":false,"acquired":true,"shares":2376,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":2376,"derivative":{"exercise_date":"2028-03-15","expiration_date":"2028-03-15","underlying":"Common Stock","underlying_shares":2376},"source":{"system":"sec-edgar","filing":"0000851520-24-000051","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152024000051/edgardoc.xml","form_type":"4"}},{"id":1575675,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2024-03-16T00:11:13.000Z","date":"2024-03-13","kind":"exercise","planned":false,"acquired":false,"shares":2660,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 13, 2020 into shares of Common Stock on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 13, 2020 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2024-03-13","expiration_date":"2024-03-13","underlying":"Common Stock","underlying_shares":2660},"source":{"system":"sec-edgar","filing":"0000851520-24-000033","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152024000033/edgardoc.xml","form_type":"4"}},{"id":1575674,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2024-03-16T00:11:13.000Z","date":"2024-03-13","kind":"tax_withholding","planned":false,"acquired":false,"shares":1320,"price":78.79,"value":104002.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":5742,"source":{"system":"sec-edgar","filing":"0000851520-24-000033","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152024000033/edgardoc.xml","form_type":"4"}},{"id":1575673,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2024-03-16T00:11:13.000Z","date":"2024-03-13","kind":"exercise","planned":false,"acquired":true,"shares":2660,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 13, 2020 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":7062,"source":{"system":"sec-edgar","filing":"0000851520-24-000033","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152024000033/edgardoc.xml","form_type":"4"}},{"id":1802452,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2023-08-18T20:45:09.000Z","date":"2023-08-18","kind":"sale","planned":false,"acquired":false,"shares":856,"price":89.07,"value":76243.92,"ownership":{"direct":true},"balance_after":4402,"source":{"system":"sec-edgar","filing":"0000851520-23-000101","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152023000101/edgardoc.xml","form_type":"4"}},{"id":1880425,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2023-05-24T22:54:42.000Z","date":"2023-05-24","kind":"sale","planned":false,"acquired":false,"shares":2841,"price":89.4798,"value":254212.1118,"ownership":{"direct":true},"balance_after":5258,"source":{"system":"sec-edgar","filing":"0000851520-23-000085","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152023000085/edgardoc.xml","form_type":"4"}},{"id":1948690,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2023-03-17T23:12:34.000Z","date":"2023-03-15","kind":"exercise","acquired":false,"shares":3158,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 15, 2019 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2023-03-15","expiration_date":"2023-03-15","underlying":"Common Stock","underlying_shares":3158},"source":{"system":"sec-edgar","filing":"0000851520-23-000070","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152023000070/edgardoc.xml","form_type":"4"}},{"id":1948689,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2023-03-17T23:12:34.000Z","date":"2023-03-15","kind":"tax_withholding","acquired":false,"shares":1388,"price":103.41,"value":143533.08,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":8099,"source":{"system":"sec-edgar","filing":"0000851520-23-000070","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152023000070/edgardoc.xml","form_type":"4"}},{"id":1948688,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2023-03-17T23:12:34.000Z","date":"2023-03-15","kind":"exercise","acquired":true,"shares":3158,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 15, 2019 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":9487,"source":{"system":"sec-edgar","filing":"0000851520-23-000070","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152023000070/edgardoc.xml","form_type":"4"}},{"id":1955526,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2023-03-14T17:55:55.000Z","date":"2023-03-10","kind":"grant","acquired":true,"shares":2000,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":2000,"derivative":{"exercise_date":"2027-03-10","expiration_date":"2027-03-10","underlying":"Common Stock","underlying_shares":2000},"source":{"system":"sec-edgar","filing":"0000851520-23-000050","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152023000050/edgardoc.xml","form_type":"4"}},{"id":2176513,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2022-08-23T18:54:09.000Z","date":"2022-08-22","kind":"sale","acquired":false,"shares":2509,"price":101.9151,"value":255704.9859,"ownership":{"direct":true},"balance_after":6329,"source":{"system":"sec-edgar","filing":"0000851520-22-000098","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152022000098/edgardoc.xml","form_type":"4"}},{"id":2334363,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2022-03-16T00:41:38.000Z","date":"2022-03-11","kind":"grant","acquired":true,"shares":2120,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":2120,"derivative":{"exercise_date":"2026-03-11","expiration_date":"2026-03-11","underlying":"Common Stock","underlying_shares":2120},"source":{"system":"sec-edgar","filing":"0000851520-22-000051","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152022000051/edgardoc.xml","form_type":"4"}},{"id":2338694,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2022-03-12T02:38:07.000Z","date":"2022-03-09","kind":"exercise","acquired":false,"shares":2992,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 9, 2018 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2022-03-09","expiration_date":"2022-03-09","underlying":"Common Stock","underlying_shares":2992},"source":{"system":"sec-edgar","filing":"0000851520-22-000030","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152022000030/edgardoc.xml","form_type":"4"}},{"id":2338693,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2022-03-12T02:38:07.000Z","date":"2022-03-09","kind":"tax_withholding","acquired":false,"shares":1315,"price":96.44,"value":126818.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":8838,"source":{"system":"sec-edgar","filing":"0000851520-22-000030","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152022000030/edgardoc.xml","form_type":"4"}},{"id":2338692,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2022-03-12T02:38:07.000Z","date":"2022-03-09","kind":"exercise","acquired":true,"shares":2992,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 9, 2018 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":10153,"source":{"system":"sec-edgar","filing":"0000851520-22-000030","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152022000030/edgardoc.xml","form_type":"4"}},{"id":2516484,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2021-11-12T18:26:50.000Z","date":"2021-11-09","kind":"sale","acquired":false,"shares":2076,"price":119.88,"value":248870.88,"ownership":{"direct":true},"balance_after":7161,"source":{"system":"sec-edgar","filing":"0000851520-21-000108","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152021000108/edgardoc.xml","form_type":"4"}},{"id":2787909,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2021-03-16T19:53:37.000Z","date":"2021-03-12","kind":"grant","acquired":true,"shares":1822,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":1822,"derivative":{"exercise_date":"2025-03-12","expiration_date":"2025-03-12","underlying":"Common Stock","underlying_shares":1822},"source":{"system":"sec-edgar","filing":"0000851520-21-000054","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152021000054/edgardoc.xml","form_type":"4"}},{"id":2790344,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2021-03-15T19:04:44.000Z","date":"2021-03-10","kind":"exercise","acquired":false,"shares":5452,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 10, 2017 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2021-03-10","expiration_date":"2021-03-10","underlying":"Common Stock","underlying_shares":5452},"source":{"system":"sec-edgar","filing":"0000851520-21-000038","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152021000038/edgardoc.xml","form_type":"4"}},{"id":2790343,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2021-03-15T19:04:44.000Z","date":"2021-03-10","kind":"tax_withholding","acquired":false,"shares":2013,"price":98.65,"value":198582.45,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":9237,"source":{"system":"sec-edgar","filing":"0000851520-21-000038","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152021000038/edgardoc.xml","form_type":"4"}},{"id":2790342,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2021-03-15T19:04:44.000Z","date":"2021-03-10","kind":"exercise","acquired":true,"shares":5452,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 10, 2017 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":11250,"source":{"system":"sec-edgar","filing":"0000851520-21-000038","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152021000038/edgardoc.xml","form_type":"4"}},{"id":3046976,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2020-08-27T01:48:39.000Z","date":"2020-08-25","kind":"sale","acquired":false,"shares":3209,"price":82.5,"value":264742.5,"ownership":{"direct":true},"balance_after":5798,"source":{"system":"sec-edgar","filing":"0000851520-20-000127","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000127/edgardoc.xml","form_type":"4"}},{"id":3207306,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2020-03-17T14:31:23.000Z","date":"2020-03-13","kind":"grant","acquired":true,"shares":2660,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":2660,"derivative":{"exercise_date":"2024-03-13","expiration_date":"2024-03-13","underlying":"Common Stock","underlying_shares":2660},"source":{"system":"sec-edgar","filing":"0000851520-20-000076","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000076/edgardoc.xml","form_type":"4"}},{"id":3212212,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2020-03-13T11:29:05.000Z","date":"2020-03-11","kind":"exercise","acquired":false,"shares":6704,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 11, 2016 into shares of Common Stock on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 11, 2016 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2020-03-11","expiration_date":"2020-03-11","underlying":"Common Stock","underlying_shares":6704},"source":{"system":"sec-edgar","filing":"0000851520-20-000054","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000054/edgardoc.xml","form_type":"4"}},{"id":3212211,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2020-03-13T11:29:05.000Z","date":"2020-03-11","kind":"exercise","acquired":false,"shares":302,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2020-03-11","expiration_date":"2020-03-11","underlying":"Common Stock","underlying_shares":302},"source":{"system":"sec-edgar","filing":"0000851520-20-000054","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000054/edgardoc.xml","form_type":"4"}},{"id":3212210,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2020-03-13T11:29:05.000Z","date":"2020-03-11","kind":"grant","acquired":true,"shares":2,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F6","text":"Dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2016-2019 not previously reported."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":302,"derivative":{"exercise_date":"2020-03-11","expiration_date":"2020-03-11","underlying":"Common Stock","underlying_shares":2},"source":{"system":"sec-edgar","filing":"0000851520-20-000054","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000054/edgardoc.xml","form_type":"4"}},{"id":3212209,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2020-03-13T11:29:05.000Z","date":"2020-03-11","kind":"tax_withholding","acquired":false,"shares":2590,"price":75.99,"value":196814.1,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":9007,"source":{"system":"sec-edgar","filing":"0000851520-20-000054","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000054/edgardoc.xml","form_type":"4"}},{"id":3212208,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2020-03-13T11:29:05.000Z","date":"2020-03-11","kind":"exercise","acquired":true,"shares":6704,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 11, 2016 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":11597,"source":{"system":"sec-edgar","filing":"0000851520-20-000054","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000054/edgardoc.xml","form_type":"4"}},{"id":3212207,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2020-03-13T11:29:05.000Z","date":"2020-03-11","kind":"exercise","acquired":true,"shares":302,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":4893,"source":{"system":"sec-edgar","filing":"0000851520-20-000054","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000054/edgardoc.xml","form_type":"4"}},{"id":3244996,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2020-02-27T15:37:24.000Z","date":"2020-02-25","kind":"sale","acquired":false,"shares":1716,"price":77.5559,"value":133085.9244,"ownership":{"direct":true},"balance_after":4591,"source":{"system":"sec-edgar","filing":"0000851520-20-000036","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000036/edgardoc.xml","form_type":"4"}},{"id":3272257,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2020-02-15T00:08:47.000Z","date":"2020-01-03","kind":"grant","acquired":true,"shares":72,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2019."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":300,"derivative":{"exercise_date":"2020-03-11","expiration_date":"2020-03-11","underlying":"Common Stock","underlying_shares":72},"source":{"system":"sec-edgar","filing":"0000851520-20-000023","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152020000023/edgardoc.xml","form_type":"5"}},{"id":3591690,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2019-03-18T21:53:44.000Z","date":"2019-03-15","kind":"grant","acquired":true,"shares":3158,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":3158,"derivative":{"exercise_date":"2023-03-15","expiration_date":"2023-03-15","underlying":"Common Stock","underlying_shares":3158},"source":{"system":"sec-edgar","filing":"0000851520-19-000071","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000071/edgardoc.xml","form_type":"4"}},{"id":3594382,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2019-03-15T17:51:05.000Z","date":"2019-03-13","kind":"exercise","acquired":false,"shares":3016,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 13, 2015 into shares of Common Stock on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 13, 2015 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2019-03-13","expiration_date":"2029-03-13","underlying":"Common Stock","underlying_shares":3016},"source":{"system":"sec-edgar","filing":"0000851520-19-000049","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000049/edgardoc.xml","form_type":"4"}},{"id":3594381,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2019-03-15T17:51:05.000Z","date":"2019-03-13","kind":"exercise","acquired":false,"shares":155,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2019-03-13","expiration_date":"2019-03-13","underlying":"Common Stock","underlying_shares":155},"source":{"system":"sec-edgar","filing":"0000851520-19-000049","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000049/edgardoc.xml","form_type":"4"}},{"id":3594380,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2019-03-15T17:51:05.000Z","date":"2019-03-13","kind":"grant","acquired":true,"shares":9,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F6","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in Q1 2019."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":155,"derivative":{"exercise_date":"2019-03-13","expiration_date":"2019-03-13","underlying":"Common Stock","underlying_shares":9},"source":{"system":"sec-edgar","filing":"0000851520-19-000049","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000049/edgardoc.xml","form_type":"4"}},{"id":3594379,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2019-03-15T17:51:05.000Z","date":"2019-03-13","kind":"tax_withholding","acquired":false,"shares":918,"price":56.92,"value":52252.56,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":6307,"source":{"system":"sec-edgar","filing":"0000851520-19-000049","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000049/edgardoc.xml","form_type":"4"}},{"id":3594378,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2019-03-15T17:51:05.000Z","date":"2019-03-13","kind":"exercise","acquired":true,"shares":155,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":7225,"source":{"system":"sec-edgar","filing":"0000851520-19-000049","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000049/edgardoc.xml","form_type":"4"}},{"id":3594377,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2019-03-15T17:51:05.000Z","date":"2019-03-13","kind":"exercise","acquired":true,"shares":3016,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 13, 2015 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":7070,"source":{"system":"sec-edgar","filing":"0000851520-19-000049","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000049/edgardoc.xml","form_type":"4"}},{"id":3666717,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2019-02-11T18:06:09.000Z","date":"2018-12-28","kind":"grant","acquired":true,"shares":76,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2018."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":228,"derivative":{"exercise_date":"2020-03-11","expiration_date":"2020-03-11","underlying":"Common Stock","underlying_shares":76},"source":{"system":"sec-edgar","filing":"0000851520-19-000021","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000021/edgardoc.xml","form_type":"5"}},{"id":3666716,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2019-02-11T18:06:09.000Z","date":"2018-12-28","kind":"grant","acquired":true,"shares":34,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2018."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":146,"derivative":{"exercise_date":"2019-03-13","expiration_date":"2019-03-13","underlying":"Common Stock","underlying_shares":34},"source":{"system":"sec-edgar","filing":"0000851520-19-000021","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152019000021/edgardoc.xml","form_type":"5"}},{"id":3855841,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2018-08-02T21:43:12.000Z","date":"2018-07-31","kind":"sale","acquired":false,"shares":2236,"price":49.4312,"value":110528.1632,"ownership":{"direct":true},"balance_after":4054,"source":{"system":"sec-edgar","filing":"0000851520-18-000099","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000099/edgardoc.xml","form_type":"4"}},{"id":3995504,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2018-03-15T22:30:26.000Z","date":"2018-03-14","kind":"exercise","acquired":false,"shares":912,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 14, 2014 into shares of Common Stock on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 14, 2014 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2018-03-14","expiration_date":"2018-03-14","underlying":"Common Stock","underlying_shares":912},"source":{"system":"sec-edgar","filing":"0000851520-18-000069","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000069/edgardoc.xml","form_type":"4"}},{"id":3995503,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2018-03-15T22:30:26.000Z","date":"2018-03-14","kind":"exercise","acquired":false,"shares":49,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2018-03-14","expiration_date":"2018-03-14","underlying":"Common Stock","underlying_shares":49},"source":{"system":"sec-edgar","filing":"0000851520-18-000069","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000069/edgardoc.xml","form_type":"4"}},{"id":3995502,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2018-03-15T22:30:26.000Z","date":"2018-03-14","kind":"grant","acquired":true,"shares":13,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2014 and Q1 2018."},{"field":"kind","element":"transactionCoding","label":"F5","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2014 and Q1 2018."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":49,"derivative":{"exercise_date":"2018-03-14","expiration_date":"2018-03-14","underlying":"Common Stock","underlying_shares":13},"source":{"system":"sec-edgar","filing":"0000851520-18-000069","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000069/edgardoc.xml","form_type":"4"}},{"id":3995501,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2018-03-15T22:30:26.000Z","date":"2018-03-14","kind":"tax_withholding","acquired":false,"shares":275,"price":79.45,"value":21848.75,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":3145,"source":{"system":"sec-edgar","filing":"0000851520-18-000069","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000069/edgardoc.xml","form_type":"4"}},{"id":3995500,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2018-03-15T22:30:26.000Z","date":"2018-03-14","kind":"exercise","acquired":true,"shares":49,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":3420,"source":{"system":"sec-edgar","filing":"0000851520-18-000069","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000069/edgardoc.xml","form_type":"4"}},{"id":3995499,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2018-03-15T22:30:26.000Z","date":"2018-03-14","kind":"exercise","acquired":true,"shares":912,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 14, 2014 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":3371,"source":{"system":"sec-edgar","filing":"0000851520-18-000069","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000069/edgardoc.xml","form_type":"4"}},{"id":4001931,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2018-03-12T23:35:30.000Z","date":"2018-03-09","kind":"grant","acquired":true,"shares":1496,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":1496,"derivative":{"exercise_date":"2022-03-09","expiration_date":"2022-03-09","underlying":"Common Stock","underlying_shares":1496},"source":{"system":"sec-edgar","filing":"0000851520-18-000051","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000051/edgardoc.xml","form_type":"4"}},{"id":4069346,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2018-02-09T22:54:31.000Z","date":"2017-12-29","kind":"grant","acquired":true,"shares":44,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":76,"derivative":{"exercise_date":"2020-03-11","expiration_date":"2020-03-11","underlying":"Common Stock","underlying_shares":44},"source":{"system":"sec-edgar","filing":"0000851520-18-000020","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000020/edgardoc.xml","form_type":"5"}},{"id":4069345,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2018-02-09T22:54:31.000Z","date":"2017-12-29","kind":"grant","acquired":true,"shares":20,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":56,"derivative":{"exercise_date":"2019-03-13","expiration_date":"2019-03-13","underlying":"Common Stock","underlying_shares":20},"source":{"system":"sec-edgar","filing":"0000851520-18-000020","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000020/edgardoc.xml","form_type":"5"}},{"id":4069344,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2018-02-09T22:54:31.000Z","date":"2017-12-29","kind":"grant","acquired":true,"shares":12,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2017."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":36,"derivative":{"exercise_date":"2018-03-14","expiration_date":"2018-03-14","underlying":"Common Stock","underlying_shares":12},"source":{"system":"sec-edgar","filing":"0000851520-18-000020","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152018000020/edgardoc.xml","form_type":"5"}},{"id":4381167,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2017-03-17T21:41:00.000Z","date":"2017-03-15","kind":"exercise","acquired":false,"shares":1044,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 15, 2013 into shares of Common Stock on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 15, 2013 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2017-03-13","expiration_date":"2017-03-13","underlying":"Common Stock","underlying_shares":1044},"source":{"system":"sec-edgar","filing":"0000851520-17-000079","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000079/edgardoc.xml","form_type":"4"}},{"id":4381166,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2017-03-17T21:41:00.000Z","date":"2017-03-15","kind":"exercise","acquired":false,"shares":54,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":0,"derivative":{"exercise_date":"2017-03-15","expiration_date":"2017-03-15","underlying":"Common Stock","underlying_shares":54},"source":{"system":"sec-edgar","filing":"0000851520-17-000079","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000079/edgardoc.xml","form_type":"4"}},{"id":4381165,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2017-03-17T21:41:00.000Z","date":"2017-03-15","kind":"grant","acquired":true,"shares":26,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2013, 2014, and Q1 2017."},{"field":"kind","element":"transactionCoding","label":"F5","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2013, 2014, and Q1 2017."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":54,"derivative":{"exercise_date":"2017-03-15","expiration_date":"2017-03-15","underlying":"Common Stock","underlying_shares":26},"source":{"system":"sec-edgar","filing":"0000851520-17-000079","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000079/edgardoc.xml","form_type":"4"}},{"id":4381164,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2017-03-17T21:41:00.000Z","date":"2017-03-15","kind":"tax_withholding","acquired":false,"shares":348,"price":59.65,"value":20758.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Reflects shares of common stock withheld by the Company to satify the tax withholding obligations of the Reporting Person."}],"balance_after":2459,"source":{"system":"sec-edgar","filing":"0000851520-17-000079","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000079/edgardoc.xml","form_type":"4"}},{"id":4381163,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2017-03-17T21:41:00.000Z","date":"2017-03-15","kind":"exercise","acquired":true,"shares":1044,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"Reflects the conversion of shares of vested Restricted Stock Units granted on March 15, 2013 into shares of Common Stock on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":2807,"source":{"system":"sec-edgar","filing":"0000851520-17-000079","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000079/edgardoc.xml","form_type":"4"}},{"id":4381162,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Common Stock","published_at":"2017-03-17T21:41:00.000Z","date":"2017-03-15","kind":"exercise","acquired":true,"shares":54,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Settlement of dividend equivalent rights in connection with RSU release on a 1:1 basis."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":1763,"source":{"system":"sec-edgar","filing":"0000851520-17-000079","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000079/edgardoc.xml","form_type":"4"}},{"id":4387430,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Restricted Stock Units","published_at":"2017-03-14T22:36:04.000Z","date":"2017-03-10","kind":"grant","acquired":true,"shares":2726,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Not applicable."}],"balance_after":2726,"derivative":{"exercise_date":"2021-03-10","expiration_date":"2021-03-10","underlying":"Common Stock","underlying_shares":2726},"source":{"system":"sec-edgar","filing":"0000851520-17-000061","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000061/edgardoc.xml","form_type":"4"}},{"id":4455503,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2017-02-14T01:14:55.000Z","date":"2016-12-30","kind":"grant","acquired":true,"shares":32,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2016."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":32,"derivative":{"exercise_date":"2020-03-11","expiration_date":"2020-03-11","underlying":"Common Stock","underlying_shares":32},"source":{"system":"sec-edgar","filing":"0000851520-17-000024","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000024/edgardoc.xml","form_type":"5"}},{"id":4455502,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2017-02-14T01:14:55.000Z","date":"2016-12-30","kind":"grant","acquired":true,"shares":20,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2016."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":36,"derivative":{"exercise_date":"2019-03-13","expiration_date":"2019-03-13","underlying":"Common Stock","underlying_shares":20},"source":{"system":"sec-edgar","filing":"0000851520-17-000024","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000024/edgardoc.xml","form_type":"5"}},{"id":4455501,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2017-02-14T01:14:55.000Z","date":"2016-12-30","kind":"grant","acquired":true,"shares":12,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2016."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":24,"derivative":{"exercise_date":"2018-03-14","expiration_date":"2018-03-14","underlying":"Common Stock","underlying_shares":12},"source":{"system":"sec-edgar","filing":"0000851520-17-000024","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000024/edgardoc.xml","form_type":"5"}},{"id":4455500,"issuer":{"id":4154,"kind":"organization","name":"EXPONENT INC","symbol":"EXPO"},"owners":[{"id":46186,"kind":"person","name":"Reiss Richard","position":1,"cik":"0001633078","reported_name":"Reiss Richard","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Group Vice President"}}],"security":"Dividend Equivalent Rights","published_at":"2017-02-14T01:14:55.000Z","date":"2016-12-30","kind":"grant","acquired":true,"shares":14,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"1-for-1."},{"field":"kind","element":"transactionCoding","label":"F2","text":"The dividend equivalent rights accrued with respect to RSUs, pursuant to dividends earned in 2016."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Not applicable."}],"balance_after":28,"derivative":{"exercise_date":"2017-03-15","expiration_date":"2017-03-15","underlying":"Common Stock","underlying_shares":14},"source":{"system":"sec-edgar","filing":"0000851520-17-000024","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/851520/000085152017000024/edgardoc.xml","form_type":"5"}}]}