X0508 4 2026-03-02 0 0001606163 Limbach Holdings, Inc. LMB 0001447591 Brooks Jayme L. 797 COMMONWEALTH DRIVE WARRENDALE PA 15086 0 1 0 0 Chief Financial Officer 0 Common Stock 2026-03-02 4 A 0 40835 0 A 166730 D Common Stock 2026-03-02 4 F 0 16070 89.17 D 150660 D Common Stock 3897 I By Brooks Family Trust Represents 40,835 shares of Limbach Holdings, Inc. (the "Company") common stock issued to the reporting person on March 2, 2026 upon vesting of 27,224 performance-based restricted stock units, based on the achievement of certain pre-established performance goals at above-target levels for the performance period commencing on January 1, 2023 through December 31, 2025. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3. Reflects the withholding of 16,070 shares by the Company to satisfy tax withholding requirements. Such transaction was exempt from Section 16(b) pursuant to Rule 16b-3. Shares held by the Brooks Family Trust. The reporting person and her spouse are trustees of the Brooks Family Trust. The Reporting Person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein, and the inclusion of these securities in this report will not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. /s/ Jeremiah G. Garvey, Attorney-in-Fact for Jayme L. Brooks 2026-03-04