{"transactions":[{"id":1860277,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-06-09T18:08:40.000Z","date":"2023-06-07","kind":"grant","planned":false,"acquired":true,"shares":3585,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of restricted stock awarded to the Reporting Person by the Issuer on June 7, 2023, which vest in two substantially equal installments on each of June 7, 2024 and June 7, 2025."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 1,295 shares of restricted stock that vest on June 9, 2024."}],"balance_after":61320,"source":{"system":"sec-edgar","filing":"0001415889-23-009535","document":"form4-06092023_100636.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000141588923009535/form4-06092023_100636.xml","form_type":"4"}},{"id":2049504,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-01-20T18:30:49.000Z","date":"2022-06-09","kind":"grant","acquired":true,"shares":2589,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares of restricted stock vest in two substantially equal installments on each of June 9, 2023 and June 9, 2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 892 shares of restricted stock that vest on each of June 9, 2023 and (ii) 1,527 shares of restricted stock that vest on June 11, 2022."}],"balance_after":57735,"source":{"system":"sec-edgar","filing":"0001415889-23-001282","document":"form4a-01202023_110139.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000141588923001282/form4a-01202023_110139.xml","form_type":"4/A","original_submission_date":"2022-06-10"}},{"id":2671523,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2021-06-11T18:39:52.000Z","date":"2021-06-09","kind":"grant","acquired":true,"shares":1783,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares of restricted stock vest in two substantially equal installments on each of June 9, 2022 and June 9, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 829 shares of restricted stock that vest on June 13, 2021, (ii) 1,084 shares of restricted stock that vest on June 13, 2021, (iii) 1,526 shares of restricted stock that vest on June 11, 2021 and (iv) 1,527 shares of restricted stock that vest on June 11, 2022."}],"balance_after":55146,"source":{"system":"sec-edgar","filing":"0001179110-21-006625","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911021006625/edgar.xml","form_type":"4"}},{"id":3110224,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-06-15T20:53:37.000Z","date":"2020-06-11","kind":"grant","acquired":true,"shares":3053,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares of restricted stock vest in two substantially equal installments on each of June 11, 2021 and June 11, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 829 shares of restricted stock that vest June 13, 2021 and (ii) 1,084 shares of restricted stock that vest on June 13, 2021."}],"balance_after":53363,"source":{"system":"sec-edgar","filing":"0001179110-20-007385","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911020007385/edgar.xml","form_type":"4"}},{"id":3478580,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2019-06-25T13:25:43.000Z","date":"2019-06-24","kind":"exercise","acquired":false,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":4.01,"exercise_date":"2013-06-06","expiration_date":"2021-06-06","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001179110-19-008070","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911019008070/edgar.xml","form_type":"4"}},{"id":3478579,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-06-25T13:25:43.000Z","date":"2019-06-24","kind":"exercise","acquired":true,"shares":5000,"price":4.01,"value":20050.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (i) 491 shares of restricted stock that vest on June 8, 2020, (ii) 1,657 shares of restricted stock that vest in two substantially equal installments on each of June 13, 2020 and June 13, 2021 and (iii) 2,168 shares of restricted stock that vest in two substantially equal installments on each of June 13, 2020 and June 13, 2021."}],"balance_after":50310,"source":{"system":"sec-edgar","filing":"0001179110-19-008070","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911019008070/edgar.xml","form_type":"4"}},{"id":3487458,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-06-17T16:50:35.000Z","date":"2019-06-13","kind":"grant","acquired":true,"shares":2168,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares of restricted stock vest in two equal installments  on each of June 13, 2020 and June 13, 2021"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 491 shares of restricted stock that vest on June 8, 2020 and (ii) 1,657 shares of restricted stock that vest in two substantially equal installments on each of June 13, 2020 and June 13, 2021."}],"balance_after":45310,"source":{"system":"sec-edgar","filing":"0001179110-19-007763","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911019007763/edgar.xml","form_type":"4"}},{"id":3892216,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-06-15T17:02:48.000Z","date":"2018-06-13","kind":"grant","acquired":true,"shares":2485,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares vest in three substantially equal installments  on each of June 13, 2019, June 13, 2020 and June 13, 2021"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes (i) 983 shares of restricted stock that vest in two substantially equal installments on each of June 8, 2019 and June 8, 2020 and (ii) 1,528 shares of restricted stock that vest on June 9, 2019."}],"balance_after":43142,"source":{"system":"sec-edgar","filing":"0001179110-18-008638","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911018008638/edgar.xml","form_type":"4"}},{"id":3963901,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2018-04-13T17:32:50.000Z","date":"2018-04-11","kind":"exercise","acquired":false,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option became exercisable in two substantially equal installments on each of June 10, 2009 and June 10, 2010."}],"balance_after":0,"derivative":{"exercise_price":5.21,"expiration_date":"2018-06-10","underlying":"Common Stock","underlying_shares":2000},"source":{"system":"sec-edgar","filing":"0001179110-18-005636","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911018005636/edgar.xml","form_type":"4"}},{"id":3963900,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2018-04-13T17:32:50.000Z","date":"2018-04-11","kind":"exercise","acquired":true,"shares":2000,"price":5.21,"value":10420.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes (i) 1,200 shares of restricted stock that vest on June 5, 2018, (ii) 1,474 shares of restricted stock that vest in three substantially equal installments on each of June 8, 2018, June 8, 2019 and June 8, 2020 and (iii) 3,056 shares of restricted stock that vest in two substantially equal installments on each of June 9, 2018 and June 9, 2019."}],"balance_after":40657,"source":{"system":"sec-edgar","filing":"0001179110-18-005636","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911018005636/edgar.xml","form_type":"4"}},{"id":4285379,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-06-12T13:30:05.000Z","date":"2017-06-08","kind":"grant","acquired":true,"shares":1474,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares vest in three substantially equal installments on each of June 8, 2018, June 8, 2019 and June 8, 2020."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 4,583 shares of restricted stock that vest in three substantially equal installments on each of June 9, 2017, June 9, 2018 and June 9, 2019 and includes 1,200 shares of restricted stock that vest on June 5, 2018."}],"balance_after":38657,"source":{"system":"sec-edgar","filing":"0001179110-17-008868","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911017008868/edgar.xml","form_type":"4"}},{"id":4351977,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2017-04-14T13:57:09.000Z","date":"2017-04-12","kind":"exercise","acquired":false,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option became exercisable in two equal installments on each of June 12, 2008 and June 12, 2009."}],"balance_after":0,"derivative":{"exercise_price":9.28,"expiration_date":"2017-06-12","underlying":"Common Stock","underlying_shares":2000},"source":{"system":"sec-edgar","filing":"0001179110-17-005997","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911017005997/edgar.xml","form_type":"4"}},{"id":4351976,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-04-14T13:57:09.000Z","date":"2017-04-12","kind":"exercise","acquired":true,"shares":2000,"price":9.28,"value":18560.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes 4,583 shares that vest in three substantially equal installments on each of June 9, 2017, June 9, 2018 and June 9, 2019 and includes 2,400 shares that vest in two equal installments on each of June 5, 2017 and June 5, 2018."}],"balance_after":37183,"source":{"system":"sec-edgar","filing":"0001179110-17-005997","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911017005997/edgar.xml","form_type":"4"}},{"id":4489739,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2017-01-17T19:44:36.000Z","date":"2015-06-05","kind":"grant","acquired":true,"shares":3600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The shares vest in three equal installments on each of June 5, 2016, June 5, 2017 and June 5, 2018."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The original Form 4 had omitted 2,500 shares from the total amount of securities beneficially owned following the reported transaction due to an inadvertent miscalculation. These 2,500 shares were also omitted from four Forms 4 filed by the reporting person after his original Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The original Form 4 had also reported all of the shares as held directly by the reporting person whereas only 13,600 shares are held directly."}],"balance_after":13600,"source":{"system":"sec-edgar","filing":"0001179110-17-000977","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911017000977/edgar.xml","form_type":"4/A","original_submission_date":"2015-06-09"}},{"id":4577463,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (Right to Buy)","published_at":"2016-10-19T20:16:28.000Z","date":"2016-10-19","kind":"exercise","acquired":false,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":10.64,"exercise_date":"2007-05-22","expiration_date":"2016-11-22","underlying":"Common Stock","underlying_shares":2000},"source":{"system":"sec-edgar","filing":"0001179110-16-030829","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911016030829/edgar.xml","form_type":"4"}},{"id":4577462,"issuer":{"id":4758,"kind":"organization","name":"Willdan Group, Inc.","symbol":"WLDN"},"owners":[{"id":112508,"kind":"person","name":"RENKEN KEITH","position":1,"cik":"0001251079","reported_name":"RENKEN KEITH","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2016-10-19T20:16:28.000Z","date":"2016-10-19","kind":"exercise","acquired":true,"shares":2000,"price":10.64,"value":21280.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes 4,583 shares that vest in three equal installments on each of June 9, 2017, June 9, 2018 and June 9, 2019 and includes 2,400 shares that vest in two equal installments on each of June 5, 2017 and June 5, 2018."}],"balance_after":35183,"source":{"system":"sec-edgar","filing":"0001179110-16-030829","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1251079/000117911016030829/edgar.xml","form_type":"4"}}]}