LMB

SEC source: 0001628280-21-000071 · wf-form4_160988306794329.xml · derivative · entry 6

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,834

Underlying: Common Stock · 1,334 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.

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 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued employment through the applicable vesting date.

F2 · derivative.expiration_date: This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued employment through the applicable vesting date.

SEC source: 0001628280-21-000071 · wf-form4_160988306794329.xml · nonDerivative · entry 5

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,162

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 · 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.

SEC source: 0001628280-21-000071 · wf-form4_160988306794329.xml · nonDerivative · entry 4

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,662

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 · 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.

SEC source: 0001628280-21-000071 · wf-form4_160988306794329.xml · nonDerivative · entry 3

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,329

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

F1 · 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.

SEC source: 0001628280-21-000071 · wf-form4_160988306794329.xml · nonDerivative · entry 2

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,329

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

F1 · 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.

SEC source: 0001628280-21-000071 · wf-form4_160988306794329.xml · nonDerivative · entry 1

McCann Michael M · CIK 0001760470 · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,995

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 · 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.

SEC source: 0001628280-21-000072 · wf-form4_160988310765693.xml · derivative · entry 7

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,401

Underlying: Common Stock · 3,200 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.

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

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

SEC source: 0001628280-21-000072 · wf-form4_160988310765693.xml · derivative · entry 6

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,201

Underlying: Common Stock · 1,066 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 01/01/2020. 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: 0001628280-21-000072 · wf-form4_160988310765693.xml · derivative · entry 5

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,267

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 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

F3 · derivative.expiration_date: This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000072 · wf-form4_160988310765693.xml · derivative · entry 4

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,334

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 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date.

F2 · derivative.expiration_date: This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000072 · wf-form4_160988310765693.xml · nonDerivative · entry 3

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,299

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: 0001628280-21-000072 · wf-form4_160988310765693.xml · nonDerivative · entry 2

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,233

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: 0001628280-21-000072 · wf-form4_160988310765693.xml · nonDerivative · entry 1

McNally Michael F · CIK 0001667559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,166

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: 0001628280-21-000074 · wf-form4_160988318811296.xml · derivative · entry 4

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,334

Underlying: Common Stock · 3,200 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of Limbach Holdings, Inc. common stock, exempt under Rule 16b-3.

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: 0001628280-21-000074 · wf-form4_160988318811296.xml · derivative · entry 3

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,134

Underlying: Common Stock · 799 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. common stock, exempt under Rule 16b-3.

F2 · 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 nd January 1, 2023, subject to continued service through the applicable vesting date.

F2 · 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 nd January 1, 2023, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000074 · wf-form4_160988318811296.xml · nonDerivative · entry 1

Horowitz Joshua · CIK 0001612424 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,799

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: 0001628280-21-000077 · wf-form4_160988331509935.xml · derivative · entry 5

Brooks Jayme L. · CIK 0001447591 · EVP & Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,667

Underlying: Common Stock · 10,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of Limbach Holdings, Inc. common stock, exempt under Rule 16b-3.

F4 · derivative.exercise_date: This award of RSUs was granted on 1/1/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

F4 · derivative.expiration_date: This award of RSUs was granted on 1/1/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-21-000077 · wf-form4_160988331509935.xml · derivative · entry 4

Brooks Jayme L. · CIK 0001447591 · EVP & Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,667

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.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of Limbach Holdings, Inc. common stock, exempt under Rule 16b-3.

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: 0001628280-21-000077 · wf-form4_160988331509935.xml · nonDerivative · entry 2

Brooks Jayme L. · CIK 0001447591 · EVP & Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,863

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: 0001628280-21-000076 · wf-form4_160988327686808.xml · derivative · entry 7

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,001

Underlying: Common Stock · 11,667 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of Limbach Holdings, Inc. common stock, exempt under Rule 16b-3.

F5 · derivative.exercise_date: This award of RSUs was granted on 1/1/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

F5 · derivative.expiration_date: This award of RSUs was granted on 1/1/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued employment through the applicable vesting date. The amounts reported above (related to this grant) do not include performance-based RSUs, if any, that may be earned by the reporting person but for which the Compensation Committee has not yet determined the achievement of the applicable performance goals. Any such RSU's will be reported on a Form 4 within two business days of the date of such determination.

SEC source: 0001628280-21-000076 · wf-form4_160988327686808.xml · derivative · entry 6

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,334

Underlying: Common Stock · 5,833 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. 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 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.

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 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: 0001628280-21-000076 · wf-form4_160988327686808.xml · derivative · entry 5

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 79,167

Underlying: Common Stock · 11,667 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. common stock, exempt under Rule 16b-3.

F3 · derivative.exercise_date: This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

F3 · derivative.expiration_date: This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000076 · wf-form4_160988327686808.xml · derivative · entry 4

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,834

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.

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of Limbach Holdings, Inc. common stock, exempt under Rule 16b-3.

F2 · derivative.exercise_date: This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued employment through the applicable vesting date. 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.

F2 · derivative.expiration_date: This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued employment through the applicable vesting date. 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: 0001628280-21-000076 · wf-form4_160988327686808.xml · nonDerivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 426,261

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: 0001628280-21-000076 · wf-form4_160988327686808.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 420,428

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: 0001628280-21-000076 · wf-form4_160988327686808.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 408,761

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: 0001628280-21-000075 · wf-form4_160988323643043.xml · derivative · entry 7

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,401

Underlying: Common Stock · 3,200 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.

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

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

SEC source: 0001628280-21-000075 · wf-form4_160988323643043.xml · derivative · entry 6

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,201

Underlying: Common Stock · 1,066 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 01/01/2020. 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: 0001628280-21-000075 · wf-form4_160988323643043.xml · derivative · entry 5

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,267

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 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

F3 · derivative.expiration_date: This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000075 · wf-form4_160988323643043.xml · derivative · entry 4

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,334

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 06/01/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date.

F2 · derivative.expiration_date: This award of RSUs was granted on 06/01/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000075 · wf-form4_160988323643043.xml · nonDerivative · entry 3

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,399

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: 0001628280-21-000075 · wf-form4_160988323643043.xml · nonDerivative · entry 2

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,333

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: 0001628280-21-000075 · wf-form4_160988323643043.xml · nonDerivative · entry 1

Krzeminski Laurel J · CIK 0001493187 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,266

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: 0001628280-21-000073 · wf-form4_160988315033803.xml · derivative · entry 7

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,401

Underlying: Common Stock · 3,200 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.

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: 0001628280-21-000073 · wf-form4_160988315033803.xml · derivative · entry 6

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,201

Underlying: Common Stock · 1,066 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 01/01/2020. 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: 0001628280-21-000073 · wf-form4_160988315033803.xml · derivative · entry 5

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,267

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 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

F3 · derivative.expiration_date: This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000073 · wf-form4_160988315033803.xml · derivative · entry 4

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,334

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 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date.

F2 · derivative.expiration_date: This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000073 · wf-form4_160988315033803.xml · nonDerivative · entry 3

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,499

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: 0001628280-21-000073 · wf-form4_160988315033803.xml · nonDerivative · entry 2

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,433

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: 0001628280-21-000073 · wf-form4_160988315033803.xml · nonDerivative · entry 1

Young Norbert W. · CIK 0001679800 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,366

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: 0001628280-21-000068 · wf-form4_160988302158958.xml · derivative · entry 7

SWETS LARRY G JR · CIK 0001409891 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,401

Underlying: Common Stock · 3,200 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.

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

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

SEC source: 0001628280-21-000068 · wf-form4_160988302158958.xml · derivative · entry 6

SWETS LARRY G JR · CIK 0001409891 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,201

Underlying: Common Stock · 1,066 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 01/01/2020. 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: 0001628280-21-000068 · wf-form4_160988302158958.xml · derivative · entry 5

SWETS LARRY G JR · CIK 0001409891 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,267

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 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

F3 · derivative.expiration_date: This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000068 · wf-form4_160988302158958.xml · derivative · entry 4

SWETS LARRY G JR · CIK 0001409891 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,334

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 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date.

F2 · derivative.expiration_date: This award of RSUs was granted on 04/13/2018. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2019, January 1, 2020 and January 1, 2021, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000068 · wf-form4_160988302158958.xml · nonDerivative · entry 3

SWETS LARRY G JR · CIK 0001409891 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,599

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: 0001628280-21-000068 · wf-form4_160988302158958.xml · nonDerivative · entry 2

SWETS LARRY G JR · CIK 0001409891 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,533

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: 0001628280-21-000068 · wf-form4_160988302158958.xml · nonDerivative · entry 1

SWETS LARRY G JR · CIK 0001409891 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,466

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: 0001628280-21-000067 · wf-form4_160988295841215.xml · derivative · entry 9

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,401

Underlying: Common Stock · 3,200 shares

Expires not disclosed

F3 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of Limbach Holdings, Inc. (the "Company") common stock, exempt under Rule 16b-3.

F7 · derivative.exercise_date: This award of RSUs was granted on 01/1/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date.

F7 · derivative.expiration_date: This award of RSUs was granted on 01/1/2021. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2022, January 1, 2023 and January 1, 2024, subject to continued service through the applicable vesting date.

SEC source: 0001628280-21-000067 · wf-form4_160988295841215.xml · derivative · entry 8

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,201

Underlying: Common Stock · 1,066 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 01/01/2020. 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.

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 service through the applicable vesting date.

SEC source: 0001628280-21-000067 · wf-form4_160988295841215.xml · derivative · entry 7

PRATT GORDON G · CIK 0001409889 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,267

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 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.

F5 · derivative.expiration_date: This award of RSUs was granted on 02/27/2019. The award is subject to service-based vesting conditions and vests in equal annual installments on each of January 1, 2020, January 1, 2021 and January 1, 2022, subject to continued service through the applicable vesting date.