LMB

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: 0001628280-26-000535 · wk-form4_1767649771.xml · derivative · entry 3

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,498

Underlying: Common Stock · 1,498 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.

F3 · derivative.exercise_date: This award of RSUs was granted on January 1, 2026. The RSUs are scheduled to cliff vest on January 1, 2027.

F3 · derivative.expiration_date: This award of RSUs was granted on January 1, 2026. The RSUs are scheduled to cliff vest on January 1, 2027.

SEC source: 0001628280-26-000535 · wk-form4_1767649771.xml · derivative · entry 2

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 956 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 January 1, 2025. The RSUs cliff vested on January 1, 2026.

F2 · derivative.expiration_date: This award of RSUs was granted on January 1, 2025. The RSUs cliff vested on January 1, 2026.

SEC source: 0001628280-26-000535 · wk-form4_1767649771.xml · nonDerivative · entry 1

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,379

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: 0001628280-26-000533 · wk-form4_1767649759.xml · derivative · entry 4

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,498

Underlying: Common Stock · 1,498 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.

F4 · derivative.exercise_date: This award of RSUs was granted on January 1, 2026. The RSUs are scheduled to cliff vest on January 1, 2027.

F4 · derivative.expiration_date: This award of RSUs was granted on January 1, 2026. The RSUs are scheduled to cliff vest on January 1, 2027.

SEC source: 0001628280-26-000533 · wk-form4_1767649759.xml · derivative · entry 3

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 956 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 January 1, 2025. The RSUs cliff vested on January 1, 2026.

F3 · derivative.expiration_date: This award of RSUs was granted on January 1, 2025. The RSUs cliff vested on January 1, 2026.

SEC source: 0001628280-26-000533 · wk-form4_1767649759.xml · nonDerivative · entry 1

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,785

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: 0001628280-26-000543 · wk-form4_1767649794.xml · derivative · entry 7

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,581

Underlying: Common Stock · 1,678 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).

F6 · 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.

F6 · 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: 0001628280-26-000543 · wk-form4_1767649794.xml · derivative · entry 6

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,903

Underlying: Common Stock · 487 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 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.

F5 · 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: 0001628280-26-000543 · wk-form4_1767649794.xml · derivative · entry 5

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,390

Underlying: Common Stock · 929 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 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.

F4 · 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: 0001628280-26-000543 · wk-form4_1767649794.xml · nonDerivative · entry 4

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,639

F2 · shares: Reflects the withholding of 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: 0001628280-26-000543 · wk-form4_1767649794.xml · nonDerivative · entry 3

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,395

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: 0001628280-26-000543 · wk-form4_1767649794.xml · nonDerivative · entry 2

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,908

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: 0001628280-26-000531 · wk-form4_1767649742.xml · derivative · entry 11

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,857

Underlying: Common Stock · 2,276 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, 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: 0001628280-26-000531 · wk-form4_1767649742.xml · derivative · entry 10

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,581

Underlying: Common Stock · 657 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 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: 0001628280-26-000531 · wk-form4_1767649742.xml · derivative · entry 9

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,238

Underlying: Common Stock · 1,266 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 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: 0001628280-26-000531 · wk-form4_1767649742.xml · derivative · entry 8

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,504

Underlying: Common Stock · 98 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 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.

F5 · 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: 0001628280-26-000531 · wk-form4_1767649742.xml · derivative · entry 7

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,602

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).

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: 0001628280-26-000531 · wk-form4_1767649742.xml · nonDerivative · entry 5

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,895

F1 · shares: Reflects the withholding of 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: 0001628280-26-000531 · wk-form4_1767649742.xml · nonDerivative · entry 4

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 128,563

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: 0001628280-26-000531 · wk-form4_1767649742.xml · nonDerivative · entry 3

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 127,906

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: 0001628280-26-000531 · wk-form4_1767649742.xml · nonDerivative · entry 2

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 126,640

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: 0001628280-26-000531 · wk-form4_1767649742.xml · nonDerivative · entry 1

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 126,542

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: 0001628280-26-000529 · wk-form4_1767649733.xml · derivative · entry 7

Angerosa Nicholas · CIK 0001965575 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,043

Underlying: Common Stock · 1,440 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).

F6 · 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.

F6 · 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: 0001628280-26-000529 · wk-form4_1767649733.xml · derivative · entry 6

Angerosa Nicholas · CIK 0001965575 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,603

Underlying: Common Stock · 416 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 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.

F5 · 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: 0001628280-26-000529 · wk-form4_1767649733.xml · derivative · entry 5

Angerosa Nicholas · CIK 0001965575 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,019

Underlying: Common Stock · 771 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 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.

F4 · 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: 0001628280-26-000529 · wk-form4_1767649733.xml · nonDerivative · entry 4

Angerosa Nicholas · CIK 0001965575 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,958

F2 · shares: Reflects the withholding of 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: 0001628280-26-000529 · wk-form4_1767649733.xml · nonDerivative · entry 3

Angerosa Nicholas · CIK 0001965575 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,537

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: 0001628280-26-000529 · wk-form4_1767649733.xml · nonDerivative · entry 2

Angerosa Nicholas · CIK 0001965575 · Regional President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,121

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: 0001628280-26-000526 · wk-form4_1767649725.xml · derivative · entry 3

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,498

Underlying: Common Stock · 1,498 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.

F3 · derivative.exercise_date: This award of RSUs was granted on January 1, 2026. The RSUs are scheduled to cliff vest on January 1, 2027.

F3 · derivative.expiration_date: This award of RSUs was granted on January 1, 2026. The RSUs are scheduled to cliff vest on January 1, 2027.

SEC source: 0001628280-26-000526 · wk-form4_1767649725.xml · derivative · entry 2

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 956 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 January 1, 2025. The RSUs cliff vested on January 1, 2026.

F2 · derivative.expiration_date: This award of RSUs was granted on January 1, 2025. The RSUs cliff vested on January 1, 2026.

SEC source: 0001628280-26-000526 · wk-form4_1767649725.xml · nonDerivative · entry 1

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,452

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: 0001628280-25-057960 · wk-form4_1766093065.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: 3,897

F1 · shares: Represents a bona fide gift of shares of Limbach Holdings, Inc's. common stock to a donor-advised charitable fund.

F2 · balance_after: 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: 0001628280-25-057476 · wk-form4_1765934456.xml · nonDerivative · entry 5

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 64,979

F2 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F4 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-25-057476 · wk-form4_1765934456.xml · nonDerivative · entry 4

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 65,079

F2 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F6 · price: This transaction was executed in multiple trades at prices ranging from $78.68 to $79.14. The price reported above reflects the weighted average price. The reporting person hereby 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 sold at each separate price.

F4 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-25-057476 · wk-form4_1765934456.xml · nonDerivative · entry 3

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 65,579

F2 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F5 · price: This transaction was executed in multiple trades at prices ranging from $77.67 to $78.16. The price reported above reflects the weighted average price. The reporting person hereby 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 sold at each separate price.

F4 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-25-057476 · wk-form4_1765934456.xml · nonDerivative · entry 2

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 66,079

F2 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $76.65 to $77.65. The price reported above reflects the weighted average price. The reporting person hereby 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 sold at each separate price.

F4 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-25-057476 · wk-form4_1765934456.xml · nonDerivative · entry 1

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 66,979

F1 · shares: Represents a bona fide gift of shares of Limbach Holdings, Inc's. common stock for which no payment or consideration was received by the reporting person.

SEC source: 0001965562-25-000003 · wk-form4_1758140081.xml · nonDerivative · entry 2

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 67,389

F2 · shares: Represents a bona fide gift of shares of Limbach Holdings, Inc's. common stock for which no payment or consideration was received by the reporting person.

SEC source: 0001965562-25-000003 · wk-form4_1758140081.xml · nonDerivative · entry 1

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 67,877

F1 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

SEC source: 0002026309-25-000003 · wk-form4_1755115947.xml · nonDerivative · entry 1

Gaboury David Richard · CIK 0002026309 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,297

SEC source: 0001628280-25-031889 · wk-form4_1750193923.xml · nonDerivative · entry 5

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,877

F1 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F6 · price: This transaction was executed in multiple trades at prices ranging from $139.11 to $139.27. The price reported above reflects the weighted average price. The reporting person hereby 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 sold at each separate price.

F2 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-25-031889 · wk-form4_1750193923.xml · nonDerivative · entry 4

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 70,177

F1 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F5 · price: This transaction was executed in multiple trades at prices ranging from $138.07 to $138.49. The price reported above reflects the weighted average price. The reporting person hereby 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 sold at each separate price.

F2 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-25-031889 · wk-form4_1750193923.xml · nonDerivative · entry 3

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 70,597

F1 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F4 · price: This transaction was executed in multiple trades at prices ranging from $136.96 to $137.95. The price reported above reflects the weighted average price. The reporting person hereby 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 sold at each separate price.

F2 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-25-031889 · wk-form4_1750193923.xml · nonDerivative · entry 2

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 71,477

F1 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $135.61 to $136.43. The price reported above reflects the weighted average price. The reporting person hereby 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 sold at each separate price.

F2 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-25-031889 · wk-form4_1750193923.xml · nonDerivative · entry 1

Sharp Jay · CIK 0001965562 · Regional President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 71,777

F1 · shares: This transaction is part of a 10b5-1 plan adopted on March 14, 2025 by the reporting person.

F2 · balance_after: The amount of common stock also contains awards of restricted stock units (each, an "RSU") granted on January 4, 2023 and January 17, 2023. Each RSU represents a contingent right to receive one share of the Company's common stock, exempt under Rule 16b-3(d)(1) and (3). Each award is subject to service-based vesting conditions. The awards vest, in the aggregate, in the amount of 3,194 shares on January 1, 2026. The amount of common stock does not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievements of the applicable performance goals. Any such performance-based RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001104659-25-024015 · tm259259-1_4seq1.xml · nonDerivative · entry 1

Horowitz Joshua · CIK 0001612424 · Director

Palm Global Small Cap Master Fund LP · CIK 0001726444 · Director Affiliate

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · Palm Global Small Cap Master Fund LP

Disclosed balance after: 164,600

F2 · price: The price reported represents a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.20 to $75.78 per share. The Reporting Persons undertake 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 sold at each separate price.

F1 · ownership.nature: Palm Management (US) LLC, as the investment manager of Palm Global Small Cap Master Fund LP ("Palm Global"), may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by Palm Global. Due to his positions as a portfolio manager and special limited partner of Palm Global and as an employee of Palm Management (US) LLC, Mr. Horowitz may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by Palm Global. Palm Management (US) LLC and Mr. Horowitz expressly disclaim such beneficial ownership except to the extent of their pecuniary interest therein.