Comfort Systems USA SVP & CHRO Terrence Reed Forfeits RSU Shares

This Form 4 filing reports that Terrence Reed, Senior Vice President & Chief Human Resources Officer of Comfort Systems USA Inc., forfeited 273 shares of common stock on April 1, 2026. The forfeitures relate to restricted stock units (RSUs) that vested on that date. Specifically, Reed forfeited 98 shares from RSUs granted on March 19, 2025, 82 shares from RSUs granted on March 20, 2024, and 93 shares from RSUs granted on March 21, 2023. All forfeitures were priced at $1,429.595 per share, based on the average of the high and low stock price on April 1, 2026. Following these transactions, Reed's direct ownership decreased to 2,968 shares. The filing was signed by Rachel R. Eslicker as Attorney-in-Fact on April 3, 2026.