144 0001205073 XXXXXXXX LIVE 0001035983 COMFORT SYSTEMS USA INC 001-13011 9753 KATY FREEWAY SUITE 700 HOUSTON MA 77024 7138309600 GEORGE WILLIAM III Officer COMMON Raymond James & Associates

880 Carillon Parkway St. Petersburg FL 33716

1000 2020964.64 35100000 05/11/2026 NYSE COMMON 11/05/2021 RSU Issuer N 1000 05/11/2026 N/A N William George

347 Westminster Dr. Houston TX 77024

Common 02/23/2026 9000 12914749.00 William George

347 Westminster Dr Houston TX 77024

4000 05/08/2026 4000 7792682.00 05/11/2026 Rashida Mitchell, as duly authorized representative of Raymond James & Associates, Inc., as attorney-in-fact for William George