144 0001563462 XXXXXXXX LIVE 0001035983 COMFORT SYSTEMS USA INC 001-13011 9753 KATY FREEWAY SUITE 700 HOUSTON TX 77024 7138309600 Constance E. Skidmore Director Common Merrill Lynch Wealth Management

One Bryant Park 46th Floor New York, NY 10036

1000 1425000 35174967 02/24/2026 NYSE Common 05/17/2024 Equity Compensation Issuer N 498 05/17/2024 Equity Compensation Common 05/15/2014 Equity Compensation Issuer N 502 05/15/2014 Equity Compensation Y 02/23/2026 /s/ Rachel Eslicker, Attorney-in-Fact