X0609 4 2026-04-24 0 0001606163 Limbach Holdings, Inc. LMB 0001447591 Brooks Jayme L. false 5102 W LAUREL STREET, SUITE 700 TAMPA FL 33607 0 1 0 0 Chief Financial Officer 1 Common Stock 2026-04-24 4 S 0 2173 100.0516 D 128667 D Common Stock 3897 I By Brooks Family Trust This transaction is part of a 10b5-1 plan adopted on December 16, 2025 by the reporting person. This transaction was executed in multiple trades at prices ranging from $100.00 to $100.50. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. 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 2026-04-28