X0609 4 2026-09-11 0 0001606163 Limbach Holdings, Inc. LMB 0001612424 Horowitz Joshua false C/O PALM MANAGEMENT (US) LLC 19 WEST ELM STREET GREENWICH CT 06830 1 0 0 0 0001726444 Palm Global Small Cap Master Fund LP false C/O PALM MANAGEMENT (US) LLC 19 WEST ELM STREET GREENWICH CT 06830 0 0 0 1 Director Affiliate 0 Common Stock 2026-09-11 4 P 0 1000 49.59 A 43785 D Common Stock 2026-09-11 4 P 0 2600 49.0097 A 167200 I Palm Global Small Cap Master Fund LP Common Stock 2026-09-15 4 P 0 212 50.66 A 43997 D Common Stock 2026-09-15 4 P 0 3346 50.6069 A 170546 I Palm Global Small Cap Master Fund LP Common Stock 2026-09-15 4 P 0 662 51.25 A 171208 I Palm Global Small Cap Master Fund LP Palm Management (US) LLC, as the investment manager of Palm Global Small Cap Master Fund LP ("Palm Global"), may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by Palm Global. Due to his positions as a portfolio manager and special limited partner of Palm Global and as an employee of Palm Management (US) LLC, Mr. Horowitz may be deemed to be a beneficial owner of the shares of common stock disclosed as directly owned by Palm Global. Palm Management (US) LLC and Mr. Horowitz expressly disclaim such beneficial ownership except to the extent of their pecuniary interest therein. The price reported represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $48.88 to $49.745 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. The price reported represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $50.21 to $51.17 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. /s/ Joshua Horowitz 2026-09-15 PALM GLOBAL SMALL CAP MASTER FUND LP, by Palm Global Small Cap Fund GP, Ltd., its general partner, by Palm Management (US) LLC, its investment manager, /s/ Joshua S. Horowitz, Director 2026-09-15