Comfort Systems U (FIX)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-18 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: COMFORT SYSTEMS USA INC (FIX) CIK: 0001035983 --- Reporting Owner --- Name: MYERS FRANKLIN CIK: 0001207002 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-18 | Code: A (Grant or award) Shares: +105 | Price: $0.00 Shares Owned After: 69,088 | Ownership: D (Direct) Footnotes: [F1] Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $200,000, as rounded up to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] The shares held indirectly were transferred from direct to indirect beneficial ownership in a transaction exempt from Section 16 pursuant to Rule 16a-13. --- Footnotes (Complete Index) --- F1: Shares granted pursuant to the 2017 Omnibus Incentive Plan as approved by stockholders on May 23, 2017. Non-employee directors are given an annual grant of Comfort Systems USA Common Stock following election or reelection at the Company's annual stockholders' meeting. This year's grant is equal to $200,000, as rounded up to the nearest whole share, based on the average of the high and low price of the Company's Common Stock on the day of the annual stockholders' meeting. F2: The shares held indirectly were transferred from direct to indirect beneficial ownership in a transaction exempt from Section 16 pursuant to Rule 16a-13. --- Signature --- /s/ /s/ Rachel R. Eslicker, Attorney-in-Fact (2026-05-19)