X0508 4 2026-03-05 0000105634 EMCOR Group, Inc. EME 0001306045 Guzzi Anthony 301 MERRITT SEVEN NORWALK CT 06851 1 1 0 0 Chairman, President and CEO 1 Common Stock 2026-03-05 4 S 0 36000 729.48 D 170299 D Common Stock 5790 I By the Guzzi Family Irrevocable Trust The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan dated as of December 2, 2025 and effective as of March 5, 2026. The price reported is the weighted average of all the shares sold on March 5, 2026. The shares were sold at an average price of $729.48, at varying prices in the range of $705.55 to $735.36. The Reporting person undertakes, upon request by the Staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price. Includes shares issuable in respect of restricted stock units. These securities were transferred by the reporting person as a gift to the Guzzi Family Irrevocable Trust (the "Trust") for the benefit of the reporting person's children. The reporting person's spouse is trustee of the Trust. Such transfer was reported on a previously filed Form 4. The reporting person disclaims beneficial ownership of such securities. Maxine L. Mauricio, Attorney-in-Fact 2026-03-09