LMB

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: 0001628280-24-000298 · wk-form4_1704324193.xml · derivative · entry 5

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,914

Underlying: Common Stock · 1,914 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. (the "Company") common stock, exempt under Rule 16b-3.

F4 · derivative.exercise_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

F4 · derivative.expiration_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

SEC source: 0001628280-24-000298 · wk-form4_1704324193.xml · derivative · entry 4

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,906 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.

F1 · 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.

F3 · derivative.exercise_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

F3 · derivative.expiration_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

SEC source: 0001628280-24-000298 · wk-form4_1704324193.xml · derivative · entry 3

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,906

Underlying: Common Stock · 1,067 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.

F1 · 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.

F2 · 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 service through the applicable vesting date.

F2 · 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 service through the applicable vesting date.

SEC source: 0001628280-24-000298 · wk-form4_1704324193.xml · nonDerivative · entry 2

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,482

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: 0001628280-24-000298 · wk-form4_1704324193.xml · nonDerivative · entry 1

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,576

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: 0001628280-24-000300 · wk-form4_1704324203.xml · derivative · entry 6

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,914

Underlying: Common Stock · 1,914 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.

F5 · derivative.exercise_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

F5 · derivative.expiration_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

SEC source: 0001628280-24-000300 · wk-form4_1704324203.xml · derivative · entry 5

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,906 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.

F4 · derivative.exercise_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

F4 · derivative.expiration_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

SEC source: 0001628280-24-000300 · wk-form4_1704324203.xml · derivative · entry 4

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,906

Underlying: Common Stock · 1,067 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.

F3 · 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 service through the applicable vesting date.

F3 · 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 service through the applicable vesting date.

SEC source: 0001628280-24-000300 · wk-form4_1704324203.xml · nonDerivative · entry 2

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,915

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: 0001628280-24-000300 · wk-form4_1704324203.xml · nonDerivative · entry 1

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,009

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: 0001628280-24-000317 · wk-form4_1704324515.xml · derivative · entry 3

Sharp Jay · CIK 0001965562 · President of Limbach

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,786

Underlying: Common Stock · 2,786 shares

Expires not disclosed

F4 · 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 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.

F5 · 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: 0001628280-24-000317 · wk-form4_1704324515.xml · nonDerivative · entry 2

Sharp Jay · CIK 0001965562 · President of Limbach

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,407

F3 · shares: Reflects the withholding of 3,159 shares by the Company to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3.

SEC source: 0001628280-24-000316 · wk-form4_1704324490.xml · derivative · entry 11

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,504

Underlying: Common Stock · 3,798 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: 0001628280-24-000316 · wk-form4_1704324490.xml · derivative · entry 10

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,706

Underlying: Common Stock · 97 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 June 30, 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.

F7 · derivative.expiration_date: This award of RSUs was granted on June 30, 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.

SEC source: 0001628280-24-000316 · wk-form4_1704324490.xml · derivative · entry 9

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,803

Underlying: Common Stock · 4,440 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: 0001628280-24-000316 · wk-form4_1704324490.xml · derivative · entry 8

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,243

Underlying: Common Stock · 3,631 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: 0001628280-24-000316 · wk-form4_1704324490.xml · derivative · entry 7

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,874

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.

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: 0001628280-24-000316 · wk-form4_1704324490.xml · nonDerivative · entry 5

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,367

F1 · shares: Reflects the withholding of 4,489 shares by Limbach Holdings, Inc. (the "Company") to satisfy tax withholding requirements. Such transactions were exempt from Section 16(b) pursuant to Rule 16b-3.

SEC source: 0001628280-24-000316 · wk-form4_1704324490.xml · nonDerivative · entry 4

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,856

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: 0001628280-24-000316 · wk-form4_1704324490.xml · nonDerivative · entry 3

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,759

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: 0001628280-24-000316 · wk-form4_1704324490.xml · nonDerivative · entry 2

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,319

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: 0001628280-24-000316 · wk-form4_1704324490.xml · nonDerivative · entry 1

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 76,688

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: 0001628280-24-000315 · wk-form4_1704324468.xml · derivative · entry 3

Angerosa Nicholas · CIK 0001965575 · President of Harper

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,312

Underlying: Common Stock · 2,312 shares

Expires not disclosed

F4 · 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 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.

F5 · 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: 0001628280-24-000315 · wk-form4_1704324468.xml · nonDerivative · entry 2

Angerosa Nicholas · CIK 0001965575 · President of Harper

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,633

F3 · shares: Reflects the withholding of 1,515 shares by the Company to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3.

SEC source: 0001628280-24-000304 · wk-form4_1704324278.xml · derivative · entry 7

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,914

Underlying: Common Stock · 1,914 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. (the "Company") common stock, exempt under Rule 16b-3.

F6 · derivative.exercise_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

F6 · derivative.expiration_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

SEC source: 0001628280-24-000304 · wk-form4_1704324278.xml · derivative · entry 6

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,906 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. (the "Company") common stock, exempt under Rule 16b-3.

F5 · derivative.exercise_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

F5 · derivative.expiration_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

SEC source: 0001628280-24-000304 · wk-form4_1704324278.xml · derivative · entry 5

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,906

Underlying: Common Stock · 1,067 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. (the "Company") common stock, exempt under Rule 16b-3.

F4 · 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 service through the applicable vesting date.

F4 · 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 service through the applicable vesting date.

SEC source: 0001628280-24-000304 · wk-form4_1704324278.xml · nonDerivative · entry 2

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,782

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: 0001628280-24-000304 · wk-form4_1704324278.xml · nonDerivative · entry 1

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,876

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: 0001628280-24-000303 · wk-form4_1704324258.xml · derivative · entry 5

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,914

Underlying: Common Stock · 1,914 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. (the "Company") common stock, exempt under Rule 16b-3.

F4 · derivative.exercise_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

F4 · derivative.expiration_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

SEC source: 0001628280-24-000303 · wk-form4_1704324258.xml · derivative · entry 4

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,906 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.

F1 · 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.

F3 · derivative.exercise_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

F3 · derivative.expiration_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

SEC source: 0001628280-24-000303 · wk-form4_1704324258.xml · derivative · entry 3

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,906

Underlying: Common Stock · 1,067 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.

F1 · 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.

F2 · 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 service through the applicable vesting date

F2 · 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 service through the applicable vesting date

SEC source: 0001628280-24-000303 · wk-form4_1704324258.xml · nonDerivative · entry 2

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,582

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: 0001628280-24-000303 · wk-form4_1704324258.xml · nonDerivative · entry 1

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,676

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: 0001628280-24-000297 · wk-form4_1704324183.xml · derivative · entry 5

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,914

Underlying: Common Stock · 1,914 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. (the "Company") common stock, exempt under Rule 16b-3.

F4 · derivative.exercise_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

F4 · derivative.expiration_date: This award of RSUs was granted on 01/01/2024. The RSUs are scheduled to cliff vest on January 1, 2025.

SEC source: 0001628280-24-000297 · wk-form4_1704324183.xml · derivative · entry 4

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,906 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.

F1 · 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.

F3 · derivative.exercise_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

F3 · derivative.expiration_date: This award of RSUs was granted on 01/04/2023. The RSUs cliff vested on January 1, 2024.

SEC source: 0001628280-24-000297 · wk-form4_1704324183.xml · derivative · entry 3

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,906

Underlying: Common Stock · 1,067 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.

F1 · 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.

F2 · 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 service through the applicable vesting date.

F2 · 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 service through the applicable vesting date.

SEC source: 0001628280-24-000297 · wk-form4_1704324183.xml · nonDerivative · entry 2

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,329

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: 0001628280-24-000297 · wk-form4_1704324183.xml · nonDerivative · entry 1

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,423

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: 0001628280-23-032775 · wk-form4_1695327162.xml · nonDerivative · entry 1

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,356

F1 · kind: Represents a bona fide gift of shares of the Company's common stock for which no payment or consideration was received by the Reporting Person.

SEC source: 0001628280-23-030391 · wk-form4_1692822744.xml · nonDerivative · entry 1

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Brooks Family Trust

Disclosed balance after: 3,568

F1 · price: The price reported represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $34.42 to $35.10 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 Brooks Family Trust. The reporting person and her spouse are trustees of the Brooks Family Trust. The Reporting Person disclaims beneficial ownership of these securities except to the extent of her 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: 0001628280-23-030441 · 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.