LMB

SEC source: 0001628280-23-000326 · wf-form4_167287507651203.xml · nonDerivative · entry 1

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,566

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: 0001628280-23-000310 · wf-form4_167287417872453.xml · derivative · entry 7

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,067

Underlying: Common Stock · 8,876 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.

F5 · derivative.exercise_date: This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023.

F5 · derivative.expiration_date: This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023.

SEC source: 0001628280-23-000310 · wf-form4_167287417872453.xml · derivative · entry 6

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,943

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.

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: 0001628280-23-000310 · wf-form4_167287417872453.xml · derivative · entry 5

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,010

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 RSU's was granted on 04/03/2020. The award is subject to service-based vesting conditions and vests 27.241732% on January 1, 2021 and 36.379134% on each of January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date.

F3 · derivative.expiration_date: This award of RSU's was granted on 04/03/2020. The award is subject to service-based vesting conditions and vests 27.241732% on January 1, 2021 and 36.379134% on each of January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date.

SEC source: 0001628280-23-000310 · wf-form4_167287417872453.xml · nonDerivative · entry 3

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,942

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: 0001628280-23-000310 · wf-form4_167287417872453.xml · nonDerivative · entry 2

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,066

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: 0001628280-23-000310 · wf-form4_167287417872453.xml · nonDerivative · entry 1

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,999

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: 0001628280-23-000314 · wf-form4_167287429077121.xml · derivative · entry 11

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,596

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.

F8 · derivative.exercise_date: This award of RSUs was granted on 01/01/2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

F8 · derivative.expiration_date: This award of RSUs was granted on 01/01/2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-23-000314 · wf-form4_167287429077121.xml · derivative · entry 10

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,227

Underlying: Common Stock · 3,333 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.

F7 · derivative.exercise_date: This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

F7 · derivative.expiration_date: This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-23-000314 · wf-form4_167287429077121.xml · derivative · entry 9

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,560

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.

F6 · derivative.exercise_date: This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSUs will be reported on a Form 4 within two business days of the date of such determination.

F6 · derivative.expiration_date: This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSUs will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-23-000314 · wf-form4_167287429077121.xml · nonDerivative · entry 6

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,185

F1 · shares: Reflects the withholding of 5,140 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: 0001628280-23-000314 · wf-form4_167287429077121.xml · nonDerivative · entry 5

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,578

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: 0001628280-23-000314 · wf-form4_167287429077121.xml · nonDerivative · entry 4

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,947

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: 0001628280-23-000314 · wf-form4_167287429077121.xml · nonDerivative · entry 3

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,614

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: 0001628280-23-000312 · wf-form4_167287423005254.xml · derivative · entry 6

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,067

Underlying: Common Stock · 8,876 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.

F4 · derivative.exercise_date: This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023.

F4 · derivative.expiration_date: This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023.

SEC source: 0001628280-23-000312 · wf-form4_167287423005254.xml · derivative · entry 5

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,943

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.

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: 0001628280-23-000312 · wf-form4_167287423005254.xml · derivative · entry 4

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,010

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 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date.

F2 · derivative.expiration_date: This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date.

SEC source: 0001628280-23-000312 · wf-form4_167287423005254.xml · nonDerivative · entry 3

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,609

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: 0001628280-23-000312 · wf-form4_167287423005254.xml · nonDerivative · entry 2

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,733

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: 0001628280-23-000312 · wf-form4_167287423005254.xml · nonDerivative · entry 1

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,666

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: 0001628280-23-000308 · wf-form4_167287410616422.xml · derivative · entry 6

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,067

Underlying: Common Stock · 8,876 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.

F4 · derivative.exercise_date: This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023.

F4 · derivative.expiration_date: This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023.

SEC source: 0001628280-23-000308 · wf-form4_167287410616422.xml · derivative · entry 5

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,943

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.

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: 0001628280-23-000308 · wf-form4_167287410616422.xml · derivative · entry 4

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,010

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 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date.

F2 · derivative.expiration_date: This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date.

SEC source: 0001628280-23-000308 · wf-form4_167287410616422.xml · nonDerivative · entry 3

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,709

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: 0001628280-23-000308 · wf-form4_167287410616422.xml · nonDerivative · entry 2

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,833

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: 0001628280-23-000308 · wf-form4_167287410616422.xml · nonDerivative · entry 1

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,766

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: 0001628280-23-000309 · wf-form4_167287415645311.xml · derivative · entry 7

Bacon Charles A. III · CIK 0001679798 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,983

Underlying: Common Stock · 8,547 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 the Company's common stock, exempt under Rule 16b-3.

F5 · derivative.exercise_date: This award of RSUs was granted on 01/01/2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

F5 · derivative.expiration_date: This award of RSUs was granted on 01/01/2022. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2023, January 1, 2024 and January 1, 2025, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-23-000309 · wf-form4_167287415645311.xml · derivative · entry 6

Bacon Charles A. III · CIK 0001679798 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,530

Underlying: Common Stock · 3,889 shares

Expires not disclosed

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

F2 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Company's 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 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 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-23-000309 · wf-form4_167287415645311.xml · derivative · entry 5

Bacon Charles A. III · CIK 0001679798 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,419

Underlying: Common Stock · 5,834 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 the Company's common stock, exempt under Rule 16b-3.

F3 · derivative.exercise_date: This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSUs will be reported on a Form 4 within two business days of the date of such determination.

F3 · derivative.expiration_date: This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSUs will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-23-000309 · wf-form4_167287415645311.xml · nonDerivative · entry 4

Bacon Charles A. III · CIK 0001679798 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 455,313

F1 · shares: Reflects the withholding of 7,616 shares by Limbach Holdings, Inc. (the "Company") to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3.

SEC source: 0001628280-23-000309 · wf-form4_167287415645311.xml · nonDerivative · entry 3

Bacon Charles A. III · CIK 0001679798 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 462,929

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: 0001628280-23-000309 · wf-form4_167287415645311.xml · nonDerivative · entry 2

Bacon Charles A. III · CIK 0001679798 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 454,382

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: 0001628280-23-000309 · wf-form4_167287415645311.xml · nonDerivative · entry 1

Bacon Charles A. III · CIK 0001679798 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 450,493

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: 0001628280-23-000307 · wf-form4_167287408156910.xml · derivative · entry 8

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,067

Underlying: Common Stock · 8,876 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.

F6 · derivative.exercise_date: This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023.

F6 · derivative.expiration_date: This award of RSUs was granted on 01/01/2022. The RSUs are scheduled to cliff vest on January 1, 2023.

SEC source: 0001628280-23-000307 · wf-form4_167287408156910.xml · derivative · entry 7

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,943

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.

F5 · derivative.exercise_date: This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date.

F5 · derivative.expiration_date: This award of RSUs was granted on 01/01/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date.

SEC source: 0001628280-23-000307 · wf-form4_167287408156910.xml · derivative · entry 6

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,010

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 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date.

F4 · derivative.expiration_date: This award of RSUs was granted on 01/01/2020. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2021, January 1, 2022 and January 1, 2023, subject to continued service through the applicable vesting date.

SEC source: 0001628280-23-000307 · wf-form4_167287408156910.xml · nonDerivative · entry 3

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,809

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: 0001628280-23-000307 · wf-form4_167287408156910.xml · nonDerivative · entry 2

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,933

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: 0001628280-23-000307 · wf-form4_167287408156910.xml · nonDerivative · entry 1

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,866

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: 0001628280-23-000314 · wf-form4_167287429077121.xml · derivative · entry 8

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,894

Underlying: Common Stock · 2,000 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.

F4 · derivative.exercise_date: This award of RSUs was granted on October 1, 2019. 42,215 shares of common stock subject to this award are subject to service-based vesting conditions and vest on the one-year anniversary of the grant date, subject to continued service through such vesting date. 6,000 shares of common stock subject to this award are subject to service-based vesting conditions and vest in equal annual installments on each of December 31, 2020, 2021 and 2022, subject to continued service through such vesting date.

F4 · derivative.expiration_date: This award of RSUs was granted on October 1, 2019. 42,215 shares of common stock subject to this award are subject to service-based vesting conditions and vest on the one-year anniversary of the grant date, subject to continued service through such vesting date. 6,000 shares of common stock subject to this award are subject to service-based vesting conditions and vest in equal annual installments on each of December 31, 2020, 2021 and 2022, subject to continued service through such vesting date.

F5 · balance_after: Reflects the cancellation of 6,000 RSUs subject to vesting upon the achievement of certain performance milestones.

SEC source: 0001628280-23-000314 · wf-form4_167287429077121.xml · nonDerivative · entry 2

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,280

F1 · shares: Reflects the withholding of 5,140 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: 0001628280-23-000314 · wf-form4_167287429077121.xml · nonDerivative · entry 1

Brooks Jayme L. · CIK 0001447591 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,027

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: 0001104659-22-121330 · tm2231218-1_4seq1.xml · nonDerivative · entry 3

Horowitz Joshua · CIK 0001612424 · Director

Palm Management (US) LLC · CIK 0001726497 · Director

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

Palmer Bradley C · CIK 0001726523 · Director

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Palm Global Small Cap Master Fund LP

Disclosed balance after: 256,672

F7 · price: The price reported represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $10.41 to $10.50 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 purchased at each separate price.

F1 · balance_after: The reported shares are owned directly by Palm Global Small Cap Master Fund LP (the "Fund"). Palm Management (US) LLC ("Palm Management"), as the investment manager of the Fund, may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Due to his positions with the Fund and Palm Management, Mr. Joshua S. Horowitz may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Due to his position with Palm Management, Mr. Bradley C. Palmer may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Messrs. Palmer and Horowitz disclaim beneficial ownership of these shares except to the extent of their respective pecuniary interest therein.

SEC source: 0001104659-22-121330 · tm2231218-1_4seq1.xml · nonDerivative · entry 2

Horowitz Joshua · CIK 0001612424 · Director

Palm Management (US) LLC · CIK 0001726497 · Director

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

Palmer Bradley C · CIK 0001726523 · Director

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Palm Global Small Cap Master Fund LP

Disclosed balance after: 254,545

F6 · price: The price reported represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $9.25 to $9.55 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 purchased at each separate price.

F1 · balance_after: The reported shares are owned directly by Palm Global Small Cap Master Fund LP (the "Fund"). Palm Management (US) LLC ("Palm Management"), as the investment manager of the Fund, may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Due to his positions with the Fund and Palm Management, Mr. Joshua S. Horowitz may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Due to his position with Palm Management, Mr. Bradley C. Palmer may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Messrs. Palmer and Horowitz disclaim beneficial ownership of these shares except to the extent of their respective pecuniary interest therein.

SEC source: 0001104659-22-121330 · tm2231218-1_4seq1.xml · nonDerivative · entry 1

Horowitz Joshua · CIK 0001612424 · Director

Palm Management (US) LLC · CIK 0001726497 · Director

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

Palmer Bradley C · CIK 0001726523 · Director

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Palm Global Small Cap Master Fund LP

Disclosed balance after: 253,835

F5 · price: The price reported represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $9.17 to $9.25 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 purchased at each separate price.

F1 · balance_after: The reported shares are owned directly by Palm Global Small Cap Master Fund LP (the "Fund"). Palm Management (US) LLC ("Palm Management"), as the investment manager of the Fund, may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Due to his positions with the Fund and Palm Management, Mr. Joshua S. Horowitz may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Due to his position with Palm Management, Mr. Bradley C. Palmer may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Messrs. Palmer and Horowitz disclaim beneficial ownership of these shares except to the extent of their respective pecuniary interest therein.

SEC source: 0001104659-22-067227 · tm2217524-1_4seq1.xml · nonDerivative · entry 1

Horowitz Joshua · CIK 0001612424 · Director

Palm Management (US) LLC · CIK 0001726497 · Director

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

Palmer Bradley C · CIK 0001726523 · Director by Deputization

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Palm Global Small Cap Master Fund LP

Disclosed balance after: 249,835

F5 · price: The price reported represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.85 to $5.95 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 purchased at each separate price.

F1 · balance_after: The reported shares are owned directly by Palm Global Small Cap Master Fund LP (the "Fund"). Palm Management (US) LLC ("Palm Management"), as the investment manager of the Fund, may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Due to his positions with the Fund and Palm Management, Mr. Joshua S. Horowitz may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Due to his position with Palm Management, Mr. Bradley C. Palmer may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by the Fund. Messrs. Palmer and Horowitz disclaim beneficial ownership of these shares except to the extent of their respective pecuniary interest therein.

SEC source: 0001628280-22-015748 · wf-form4_165402918618530.xml · nonDerivative · entry 1

Bacon Charles A. III · CIK 0001679798 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 444,659

SEC source: 0001628280-22-015365 · wf-form4_165351094970277.xml · nonDerivative · entry 2

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,932

SEC source: 0001628280-22-015478 · wf-form4_165359714930428.xml · nonDerivative · entry 1

ALVARADO LINDA G · CIK 0001122788 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,473

SEC source: 0001628280-22-015365 · wf-form4_165351094970277.xml · nonDerivative · entry 1

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,932