{"transactions":[{"id":861431,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62814,"kind":"person","name":"Angerosa Nicholas","position":1,"cik":"0001965575","reported_name":"Angerosa Nicholas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2026-03-04T22:14:10.000Z","date":"2026-03-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":8878,"price":89.17,"value":791651.26,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the withholding of 8,878 shares by the Company to satisfy tax withholding requirements. 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(the \"Company\") common stock issued to the reporting person on March 2, 2026 upon vesting of 15,040 performance-based restricted stock units, based on the achievement of certain pre-established performance goals at above-target levels for the performance period commencing on January 1, 2023 through December 31, 2025. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."}],"balance_after":76517,"source":{"system":"sec-edgar","filing":"0001628280-26-014723","document":"wk-form4_1772662447.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828026014723/wk-form4_1772662447.xml","form_type":"4"}},{"id":951360,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62814,"kind":"person","name":"Angerosa Nicholas","position":1,"cik":"0001965575","reported_name":"Angerosa Nicholas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Regional President"}}],"security":"Restricted Stock Units","published_at":"2026-01-05T21:48:59.000Z","date":"2026-01-01","kind":"grant","planned":false,"acquired":true,"shares":1440,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each RSU represents a contingent right to receive one share of the \"Company's common stock, exempt under Rule 16b-3(d)(1) and (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"This award of RSUs was granted on January 1, 2026. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2027, January 1, 2028 and January 1, 2029, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"This award of RSUs was granted on January 1, 2026. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2027, January 1, 2028 and January 1, 2029, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. 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The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2026, January 1, 2027 and January 1, 2028, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This award of RSUs was granted on January 1, 2025. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2026, January 1, 2027 and January 1, 2028, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. 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The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2025, January 1, 2026 and January 1, 2027, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"This award of RSUs was granted on January 1, 2024. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2025, January 1, 2026 and January 1, 2027, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. 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(the \"Company\") common stock issued to the reporting person on March 10, 2025 upon vesting of 12,229 performance-based restricted stock units, based on the achievement of certain pre-established performance goals at above-target levels for the performance period commencing on January 1, 2022 through December 31, 2024. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The amount of common stock contains awards of restricted stock units (each, an \"RSU\") granted on January 4, 2023, and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 2,507 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. 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The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2026, January 1, 2027 and January 1, 2028, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"This award of RSUs was granted on January 1, 2025. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2026, January 1, 2027 and January 1, 2028, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination."}],"balance_after":2790,"derivative":{"underlying":"Common Stock","underlying_shares":1248},"source":{"system":"sec-edgar","filing":"0001628280-25-000371","document":"wk-form4_1735942076.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828025000371/wk-form4_1735942076.xml","form_type":"4"}},{"id":1314676,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62814,"kind":"person","name":"Angerosa Nicholas","position":1,"cik":"0001965575","reported_name":"Angerosa Nicholas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Regional President"}}],"security":"Restricted Stock Units","published_at":"2025-01-03T22:08:04.000Z","date":"2025-01-01","kind":"exercise","planned":false,"acquired":false,"shares":770,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This award of RSUs was granted on January 1, 2024. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2025, January 1, 2026 and January 1, 2027, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This award of RSUs was granted on January 1, 2024. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2025, January 1, 2026 and January 1, 2027, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. 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(the \"Company\") common stock issued to the reporting person on March 13, 2024 upon vesting of 5,333 performance-based restricted stock units, based on the achievement of certain pre-established performance goals at above-target levels for the performance period commencing on January 1, 2021 through December 31, 2023. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The amount of common stock contains awards of restricted stock units (each, an \"RSU\") granted on January 1, 2022, January 4, 2023, and January 17, 2023, respectively. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 4,545 shares on January 1, 2025, and 2,507 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination."}],"balance_after":45796,"source":{"system":"sec-edgar","filing":"0001628280-24-011535","document":"wk-form4_1710537661.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024011535/wk-form4_1710537661.xml","form_type":"4"}},{"id":1692367,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62814,"kind":"person","name":"Angerosa Nicholas","position":1,"cik":"0001965575","reported_name":"Angerosa Nicholas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President of Harper"}}],"security":"Restricted Stock Units","published_at":"2024-01-03T23:28:03.000Z","date":"2024-01-01","kind":"grant","planned":false,"acquired":true,"shares":2312,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This award of RSUs was granted on January 1, 2024. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2025, January 1, 2026 and January 1, 2027, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This award of RSUs was granted on January 1, 2024. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2025, January 1, 2026 and January 1, 2027, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination."}],"balance_after":2312,"derivative":{"underlying":"Common Stock","underlying_shares":2312},"source":{"system":"sec-edgar","filing":"0001628280-24-000315","document":"wk-form4_1704324468.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024000315/wk-form4_1704324468.xml","form_type":"4"}},{"id":1692366,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62814,"kind":"person","name":"Angerosa Nicholas","position":1,"cik":"0001965575","reported_name":"Angerosa Nicholas","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President of Harper"}}],"security":"Common Stock","published_at":"2024-01-03T23:28:03.000Z","date":"2024-01-01","kind":"tax_withholding","planned":false,"acquired":false,"shares":1515,"price":45.47,"value":68887.05,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Reflects the withholding of 1,515 shares by the Company to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."}],"balance_after":38633,"source":{"system":"sec-edgar","filing":"0001628280-24-000315","document":"wk-form4_1704324468.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1606163/000162828024000315/wk-form4_1704324468.xml","form_type":"4"}}]}