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(the \"Company\") common stock issued to the reporting person on March 2, 2026 upon vesting of 34,672 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. 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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":"F8","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":"F7","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":"F6","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 award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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 17, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, subject to continued employment through the applicable vesting date. 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The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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 4, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, subject to continued employment through the applicable vesting date. 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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":"F8","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":"F7","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":11034,"derivative":{"underlying":"Common Stock","underlying_shares":2627},"source":{"system":"sec-edgar","filing":"0001628280-25-000368","document":"wk-form4_1735942055.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828025000368/wk-form4_1735942055.xml","form_type":"4"}},{"id":1314985,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2025-01-03T17:07:42.000Z","date":"2025-01-01","kind":"exercise","planned":false,"acquired":false,"shares":1080,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. 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 17, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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 17, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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":13661,"derivative":{"underlying":"Common Stock","underlying_shares":1080},"source":{"system":"sec-edgar","filing":"0001628280-25-000368","document":"wk-form4_1735942055.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828025000368/wk-form4_1735942055.xml","form_type":"4"}},{"id":1314984,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2025-01-03T17:07:42.000Z","date":"2025-01-01","kind":"exercise","planned":false,"acquired":false,"shares":4699,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. 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 4, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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 4, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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, 2023, January 1, 2024 and January 1, 2025, 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, 2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, 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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These shares were purchased in multiple transactions at prices ranging from $47.30 to $48.06 per share. The Reporting Person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares held by The McCann Family Revocable Living Trust. The Reporting Person and his spouse are trustees of The McCann Family Revocable Living Trust. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report will not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes."}],"balance_after":44233,"source":{"system":"sec-edgar","filing":"0001628280-24-024389","document":"wk-form4_1716238774.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024024389/wk-form4_1716238774.xml","form_type":"4"}},{"id":1574836,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-03-15T17:21:39.000Z","date":"2024-03-13","kind":"tax_withholding","planned":false,"acquired":false,"shares":12333,"price":49.76,"value":613690.08,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Reflects the withholding of 12,333 shares by the Company to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."}],"balance_after":88567,"source":{"system":"sec-edgar","filing":"0001628280-24-011537","document":"wk-form4_1710537683.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024011537/wk-form4_1710537683.xml","form_type":"4"}},{"id":1574835,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-03-15T17:21:39.000Z","date":"2024-03-13","kind":"grant","planned":false,"acquired":true,"shares":31340,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents 31,340 shares of Limbach Holdings, Inc. (the \"Company\") common stock issued to the reporting person on March 13, 2024 upon vesting of 23,333 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."}],"balance_after":100900,"source":{"system":"sec-edgar","filing":"0001628280-24-011537","document":"wk-form4_1710537683.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024011537/wk-form4_1710537683.xml","form_type":"4"}},{"id":1692788,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"grant","planned":false,"acquired":true,"shares":7882,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"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":"F8","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":"F8","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":24930,"derivative":{"underlying":"Common Stock","underlying_shares":7882},"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692787,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":false,"shares":1080,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"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":"F7","text":"This award of RSUs was granted on January 17, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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":"F7","text":"This award of RSUs was granted on January 17, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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":17048,"derivative":{"underlying":"Common Stock","underlying_shares":1080},"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692786,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":false,"shares":4698,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"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 4, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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 4, 2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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":18128,"derivative":{"underlying":"Common Stock","underlying_shares":4698},"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692785,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":false,"shares":5490,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"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, 2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, 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, 2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, 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":22826,"derivative":{"underlying":"Common Stock","underlying_shares":5490},"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692784,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":false,"shares":3889,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"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":"F4","text":"This award of RSUs was granted on January 1, 2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued 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, 2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued 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":28316,"derivative":{"underlying":"Common Stock","underlying_shares":3889},"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692783,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"tax_withholding","planned":false,"acquired":false,"shares":3882,"price":45.47,"value":176514.54,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects the withholding of 3,882 shares by Limbach Holdings, Inc. (the \"Company\") to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."}],"balance_after":69560,"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692782,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":true,"shares":1080,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":73442,"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692781,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":true,"shares":4698,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":72362,"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692780,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":true,"shares":5490,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":67664,"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1692779,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-01-03T18:27:43.000Z","date":"2024-01-01","kind":"exercise","planned":false,"acquired":true,"shares":3889,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":62174,"source":{"system":"sec-edgar","filing":"0001628280-24-000313","document":"wk-form4_1704324447.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828024000313/wk-form4_1704324447.xml","form_type":"4"}},{"id":1798746,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2023-08-23T18:35:24.000Z","date":"2023-08-21","kind":"purchase","planned":false,"acquired":true,"shares":2866,"price":35.4723,"value":101663.6118,"ownership":{"direct":false,"nature":"The McCann Family Revocable Living Trust"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $35.13 to $35.70 per share. The Reporting Person undertakes\nto provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased\nat each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes an adjustment to correct prior beneficial ownership reports that incorrectly reported shares as directly owned by the Reporting Person, and to correctly reflect the indirect ownership of\nshares through The McCann Family Revocable Living Trust."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Shares held by The McCann Family Revocable Living Trust. The Reporting Person and his spouse are trustees of The McCann Family Revocable Living Trust. The Reporting Person\ndisclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report will not be deemed an admission of\nbeneficial ownership of the reported securities for purposes of Section 16 or for any other purposes."}],"balance_after":42134,"source":{"system":"sec-edgar","filing":"0001628280-23-030441","document":"wk-form4_1692830114.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023030441/wk-form4_1692830114.xml","form_type":"4"}},{"id":1958887,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-03-10T16:21:33.000Z","date":"2023-03-08","kind":"tax_withholding","acquired":false,"shares":5801,"price":13.61,"value":78951.61,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Reflects the withholding of 5,801 shares by Limbach Holdings, Inc. (the \"Company\") to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."}],"balance_after":97453,"source":{"system":"sec-edgar","filing":"0001628280-23-007537","document":"wf-form4_167848328190126.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023007537/wf-form4_167848328190126.xml","form_type":"4"}},{"id":1958886,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-03-10T16:21:33.000Z","date":"2023-03-08","kind":"grant","acquired":true,"shares":10209,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents 10,209 shares of Limbach Holdings, Inc. common stock issued to the reporting person on March 8, 2023 upon vesting of 7,500 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, 2020 through December 31, 2022. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."}],"balance_after":103254,"source":{"system":"sec-edgar","filing":"0001628280-23-007537","document":"wf-form4_167848328190126.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023007537/wf-form4_167848328190126.xml","form_type":"4"}},{"id":1958885,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2023-03-10T16:21:33.000Z","date":"2023-03-08","kind":"grant","acquired":true,"shares":13613,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents 13,613 shares of Limbach Holdings, Inc. common stock issued to the reporting person on March 8, 2023 upon vesting of 10,000 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, 2020 through December 31, 2022. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3."}],"balance_after":93045,"source":{"system":"sec-edgar","filing":"0001628280-23-007537","document":"wf-form4_167848328190126.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023007537/wf-form4_167848328190126.xml","form_type":"4"}},{"id":2052559,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2023-01-18T15:38:52.000Z","date":"2023-01-17","kind":"grant","acquired":true,"shares":3240,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. common stock, exempt under Rule 16b-3(d)(1) and (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 01/17/2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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":"F2","text":"This award of RSUs was granted on 01/17/2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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":32205,"derivative":{"underlying":"Common Stock","underlying_shares":3240},"source":{"system":"sec-edgar","filing":"0001628280-23-001178","document":"wf-form4_167407431877158.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023001178/wf-form4_167407431877158.xml","form_type":"4"}},{"id":2068142,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2023-01-04T18:18:05.000Z","date":"2023-01-04","kind":"grant","acquired":true,"shares":14096,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3(d)(1) and (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This award of RSUs was granted on 01/04/2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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":"F7","text":"This award of RSUs was granted on 01/04/2023. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2024, January 1, 2025 and January 1, 2026, 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":28965,"derivative":{"underlying":"Common Stock","underlying_shares":14096},"source":{"system":"sec-edgar","filing":"0001628280-23-000313","document":"wf-form4_167287426761516.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023000313/wf-form4_167287426761516.xml","form_type":"4"}},{"id":2068141,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2023-01-04T18:18:05.000Z","date":"2023-01-01","kind":"exercise","acquired":false,"shares":5489,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3(d)(1) and (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"This award of RSUs was granted on 01/01/2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, 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 01/01/2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, 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":14869,"derivative":{"underlying":"Common Stock","underlying_shares":5489},"source":{"system":"sec-edgar","filing":"0001628280-23-000313","document":"wf-form4_167287426761516.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023000313/wf-form4_167287426761516.xml","form_type":"4"}},{"id":2068140,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2023-01-04T18:18:05.000Z","date":"2023-01-01","kind":"exercise","acquired":false,"shares":3889,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3(d)(1) and (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued 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 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued 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":20358,"derivative":{"underlying":"Common Stock","underlying_shares":3889},"source":{"system":"sec-edgar","filing":"0001628280-23-000313","document":"wf-form4_167287426761516.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023000313/wf-form4_167287426761516.xml","form_type":"4"}},{"id":2068139,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2023-01-04T18:18:05.000Z","date":"2023-01-01","kind":"exercise","acquired":false,"shares":2500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3(d)(1) and (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This award of RSUs was granted on 05/11/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued employment through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"This award of RSUs was granted on 05/11/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued employment through the applicable vesting date."}],"balance_after":24247,"derivative":{"underlying":"Common Stock","underlying_shares":2500},"source":{"system":"sec-edgar","filing":"0001628280-23-000313","document":"wf-form4_167287426761516.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828023000313/wf-form4_167287426761516.xml","form_type":"4"}},{"id":2068138,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2023-01-04T18:18:05.000Z","date":"2023-01-01","kind":"exercise","acquired":false,"shares":3334,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. 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The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued 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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These shares were purchased in multiple transactions at prices ranging from $5.87 to $6.31 per share. 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These shares were purchased in multiple transactions at prices ranging from $5.82 to $5.86 per share. 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These shares were purchased in multiple transactions at prices ranging from $7.08 to $7.21 per share. 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The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, 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":"F7","text":"This award of RSUs was granted on 1/1/2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, subject to continued employment through the applicable vesting date. 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The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued 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, 2021, January 1, 2022 and January 1, 2023, 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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These shares were purchased in multiple transactions at prices ranging from $7.20 to $7.56, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote."}],"balance_after":45661,"source":{"system":"sec-edgar","filing":"0001628280-20-013502","document":"wf-form4_159985672153919.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828020013502/wf-form4_159985672153919.xml","form_type":"4"}},{"id":3033310,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2020-09-11T16:38:57.000Z","date":"2020-09-10","kind":"purchase","acquired":true,"shares":11468,"price":7.5305,"value":86359.774,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.50 to $7.61, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote."}],"balance_after":41186,"source":{"system":"sec-edgar","filing":"0001628280-20-013502","document":"wf-form4_159985672153919.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828020013502/wf-form4_159985672153919.xml","form_type":"4"}},{"id":3033309,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2020-09-11T16:38:57.000Z","date":"2020-09-09","kind":"purchase","acquired":true,"shares":17992,"price":7.385,"value":132870.92,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.10 to $7.61, inclusive. The reporting person undertakes to provide to Limbach Holdings, Inc. (the \"Company\"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote."}],"balance_after":29718,"source":{"system":"sec-edgar","filing":"0001628280-20-013502","document":"wf-form4_159985672153919.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000162828020013502/wf-form4_159985672153919.xml","form_type":"4"}},{"id":3152899,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2020-05-12T16:55:18.000Z","date":"2020-05-11","kind":"grant","acquired":true,"shares":7500,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock,exempt under Rule 16b-3."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock,exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 05/11/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued 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 RSUs will be reported on a Form 4 within two business days of the date of such determination."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 05/11/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued 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, exempt under Rule 16b-3."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued 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 RSUs 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 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued 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, exempt under Rule 16b-3."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."}],"balance_after":13668,"derivative":{"underlying":"Common Stock","underlying_shares":4000},"source":{"system":"sec-edgar","filing":"0001104659-20-000988","document":"tm1928451-7_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000110465920000988/tm1928451-7_4.xml","form_type":"4"}},{"id":3323571,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2020-01-03T17:25:56.000Z","date":"2020-01-01","kind":"exercise","acquired":false,"shares":333,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This award of RSUs was granted on 08/03/2018. The award is subject to service-based vesting conditions and vests in equal installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued employment through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"This award of RSUs was granted on 08/03/2018. The award is subject to service-based vesting conditions and vests in equal installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued employment through the applicable vesting date."}],"balance_after":17668,"derivative":{"underlying":"Common Stock","underlying_shares":333},"source":{"system":"sec-edgar","filing":"0001104659-20-000988","document":"tm1928451-7_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000110465920000988/tm1928451-7_4.xml","form_type":"4"}},{"id":3323570,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2020-01-03T17:25:56.000Z","date":"2020-01-01","kind":"exercise","acquired":false,"shares":1333,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. 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The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued employment through the applicable vesting date."}],"balance_after":18001,"derivative":{"underlying":"Common Stock","underlying_shares":1333},"source":{"system":"sec-edgar","filing":"0001104659-20-000988","document":"tm1928451-7_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000110465920000988/tm1928451-7_4.xml","form_type":"4"}},{"id":3323569,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2020-01-03T17:25:56.000Z","date":"2020-01-01","kind":"exercise","acquired":false,"shares":834,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. 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The remaining 50% of the award will vest upon the achievement of a specified target share price of the Company's common stock on the Nasdaq Capital Market or other applicable principal securities exchange on which the Company's shares are then listed between August 1, 2018 and August 1, 2021, subject to continued employment from August 1, 2017 through the later of July 31, 2019 and the date on which the Compensation Committee of the Board of Directors certifies the achievement of the performance goal."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on August 30, 2017. 50% of the award is subject to service-based vesting conditions and vests in equal installments on each of August 30, 2017, August 1, 2018 and August 1, 2019, subject to continued employment through the applicable vesting date. The remaining 50% of the award will vest upon the achievement of a specified target share price of the Company's common stock on the Nasdaq Capital Market or other applicable principal securities exchange on which the Company's shares are then listed between August 1, 2018 and August 1, 2021, subject to continued employment from August 1, 2017 through the later of July 31, 2019 and the date on which the Compensation Committee of the Board of Directors certifies the achievement of the performance goal."}],"balance_after":20168,"derivative":{"underlying":"Common Stock","underlying_shares":1333},"source":{"system":"sec-edgar","filing":"0001144204-19-037644","document":"tv526485_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000114420419037644/tv526485_4.xml","form_type":"4"}},{"id":3447330,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Chief Operating Officer"}}],"security":"Common Stock","published_at":"2019-08-05T16:15:21.000Z","date":"2019-08-01","kind":"exercise","acquired":true,"shares":1333,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. (the \"Company\") common stock, exempt under Rule 16b-3."}],"balance_after":5802,"source":{"system":"sec-edgar","filing":"0001144204-19-037644","document":"tv526485_4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000114420419037644/tv526485_4.xml","form_type":"4"}},{"id":3623432,"issuer":{"id":5430,"kind":"organization","name":"Limbach Holdings, Inc.","symbol":"LMB"},"owners":[{"id":62829,"kind":"person","name":"McCann Michael M","position":1,"cik":"0001760470","reported_name":"McCann Michael M","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Chief Operating Officer"}}],"security":"Restricted Stock Units","published_at":"2019-03-01T21:34:56.000Z","date":"2019-02-27","kind":"grant","acquired":true,"shares":12000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Limbach Holdings, Inc. common stock, exempt under Rule 16b-3(d)(1) & (3)."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date."}],"balance_after":21501,"derivative":{"underlying":"Common Stock","underlying_shares":12000},"source":{"system":"sec-edgar","filing":"0001144204-19-011769","document":"tv515304_4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1760470/000114420419011769/tv515304_4.xml","form_type":"4"}}]}