144 0001726444 XXXXXXXX LIVE 0001606163 Limbach Holdings, Inc. 001-36541 797 Commonwealth Drive Warrendale PA 15086 412-359-2100 Palm Global Small Cap Master Fund LP (1) Shareholder (1) Common Stock BTIG, LLC

600 Montgomery Street, 6th Floor San Francisco CA 94111

25400 1861820.00 11353379 03/14/2025 NASDAQ Common Stock 12/31/2018 See Remark 2 See Remark 2 N 25400 12/31/2018 See Remark 2 Y (1) Joshua Horowitz, who serves as portfolio manager and special limited partner of Palm Global Small Cap Master Fund LP, is a member of the board of directors of the Issuer. (2) The shares reported herein to be sold were originally acquired through open market purchases on dates ranging from December 31, 2018 to November 22, 2022. 03/14/2025 Palm Global Small Cap Master Fund LP, By: Palm Global Small Cap Fund GP, Ltd., its general partner, /s/ Joshua S. Horowitz, Director