McCann Michael M

SEC source: 0001628280-26-014724 · wk-form4_1772662453.xml · nonDerivative · entry 2

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 167,514

F2 · shares: Reflects the withholding of 20,466 shares by the Company to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3.

SEC source: 0001628280-26-014724 · wk-form4_1772662453.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 187,980

F1 · shares: Represents 52,008 shares of Limbach Holdings, Inc. (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. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · derivative · entry 11

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,887

Underlying: Common Stock · 6,260 shares

Expires not disclosed

F3 · derivative.exercise_price: 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).

F8 · derivative.exercise_date: 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.

F8 · derivative.expiration_date: 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.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · derivative · entry 10

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,627

Underlying: Common Stock · 1,499 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F7 · derivative.exercise_date: 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.

F7 · derivative.expiration_date: 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.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · derivative · entry 9

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,126

Underlying: Common Stock · 2,627 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F6 · derivative.exercise_date: 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.

F6 · derivative.expiration_date: 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.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · derivative · entry 8

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,753

Underlying: Common Stock · 1,080 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · derivative · entry 7

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,833

Underlying: Common Stock · 4,699 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · nonDerivative · entry 5

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 135,972

F1 · shares: Reflects the withholding of 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.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · nonDerivative · entry 4

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,510

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · nonDerivative · entry 3

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,011

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · nonDerivative · entry 2

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,384

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-26-000541 · wk-form4_1767649789.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,304

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-012404 · wk-form4_1741814027.xml · nonDerivative · entry 2

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 128,605

F2 · shares: Reflects the withholding of 19,443 shares by the Company to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3.

SEC source: 0001628280-25-012404 · wk-form4_1741814027.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 148,048

F1 · shares: Represents 49,408 shares of Limbach Holdings, Inc. (the "Company") common stock issued to the reporting person on March 10, 2025 upon vesting of 32,939 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.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · derivative · entry 11

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,532

Underlying: Common Stock · 4,498 shares

Expires not disclosed

F3 · derivative.exercise_price: 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).

F8 · derivative.exercise_date: 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.

F8 · derivative.expiration_date: 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.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · derivative · entry 10

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,034

Underlying: Common Stock · 2,627 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F7 · derivative.exercise_date: 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.

F7 · derivative.expiration_date: 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.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · derivative · entry 9

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,661

Underlying: Common Stock · 1,080 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F6 · derivative.exercise_date: 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.

F6 · derivative.expiration_date: 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.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · derivative · entry 8

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,741

Underlying: Common Stock · 4,699 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · derivative · entry 7

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,440

Underlying: Common Stock · 5,490 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · nonDerivative · entry 5

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,640

F1 · shares: Reflects the withholding of 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.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · nonDerivative · entry 4

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,463

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · nonDerivative · entry 3

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,836

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · nonDerivative · entry 2

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,756

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-000368 · wk-form4_1735942055.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 94,057

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-24-024389 · wk-form4_1716238774.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · The McCann Family Revocable Living Trust

Disclosed balance after: 44,233

F1 · price: The price reported represents a weighted average price. 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.

F2 · ownership.nature: 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.

SEC source: 0001628280-24-011537 · wk-form4_1710537683.xml · nonDerivative · entry 2

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,567

F2 · shares: 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.

SEC source: 0001628280-24-011537 · wk-form4_1710537683.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,900

F1 · shares: 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.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · derivative · entry 11

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,930

Underlying: Common Stock · 7,882 shares

Expires not disclosed

F3 · derivative.exercise_price: 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).

F8 · derivative.exercise_date: 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.

F8 · derivative.expiration_date: 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.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · derivative · entry 10

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,048

Underlying: Common Stock · 1,080 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F7 · derivative.exercise_date: 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.

F7 · derivative.expiration_date: 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.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · derivative · entry 9

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,128

Underlying: Common Stock · 4,698 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F6 · derivative.exercise_date: 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.

F6 · derivative.expiration_date: 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.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · derivative · entry 8

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,826

Underlying: Common Stock · 5,490 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · derivative · entry 7

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,316

Underlying: Common Stock · 3,889 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: 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).

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · nonDerivative · entry 5

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,560

F1 · shares: 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.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · nonDerivative · entry 4

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,442

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · nonDerivative · entry 3

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,362

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · nonDerivative · entry 2

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,664

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-24-000313 · wk-form4_1704324447.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,174

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-23-030441 · wk-form4_1692830114.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · The McCann Family Revocable Living Trust

Disclosed balance after: 42,134

F1 · price: 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 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.

F2 · balance_after: 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 shares through The McCann Family Revocable Living Trust.

F3 · ownership.nature: 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.

SEC source: 0001628280-23-007537 · wf-form4_167848328190126.xml · nonDerivative · entry 3

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 97,453

F3 · shares: 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.

SEC source: 0001628280-23-007537 · wf-form4_167848328190126.xml · nonDerivative · entry 2

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 103,254

F2 · shares: 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.

SEC source: 0001628280-23-007537 · wf-form4_167848328190126.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,045

F1 · shares: 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.

SEC source: 0001628280-23-001178 · wf-form4_167407431877158.xml · derivative · entry 1

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,205

Underlying: Common Stock · 3,240 shares

Expires not disclosed

F1 · derivative.exercise_price: 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).

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

SEC source: 0001628280-23-000313 · wf-form4_167287426761516.xml · derivative · entry 10

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,965

Underlying: Common Stock · 14,096 shares

Expires not disclosed

F2 · derivative.exercise_price: 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).

F7 · derivative.exercise_date: 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.

F7 · derivative.expiration_date: 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.

SEC source: 0001628280-23-000313 · wf-form4_167287426761516.xml · derivative · entry 9

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,869

Underlying: Common Stock · 5,489 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: 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).

F6 · derivative.exercise_date: 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.

F6 · derivative.expiration_date: 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.

SEC source: 0001628280-23-000313 · wf-form4_167287426761516.xml · derivative · entry 8

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,358

Underlying: Common Stock · 3,889 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: 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).

F5 · derivative.exercise_date: 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.

F5 · derivative.expiration_date: 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.

SEC source: 0001628280-23-000313 · wf-form4_167287426761516.xml · derivative · entry 7

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,247

Underlying: Common Stock · 2,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: 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).

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001628280-23-000313 · wf-form4_167287426761516.xml · derivative · entry 6

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,747

Underlying: Common Stock · 3,334 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: 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).

F3 · derivative.exercise_date: 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.

F3 · derivative.expiration_date: 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.

SEC source: 0001628280-23-000313 · wf-form4_167287426761516.xml · nonDerivative · entry 5

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 79,432

F1 · shares: Reflects the withholding of 4,513 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.

SEC source: 0001628280-23-000313 · wf-form4_167287426761516.xml · nonDerivative · entry 4

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,945

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-23-000313 · wf-form4_167287426761516.xml · nonDerivative · entry 3

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 78,456

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.