GEORGE WILLIAM III 4

What Happened
George William III, Chief Financial Officer of Comfort Systems USA, exercised 9,000 stock options on Feb 23, 2026 at an exercise price of $42.50 per share (cost $382,500) and sold 9,000 shares in an open‑market sale that day at an average price of $1,434.97 per share, generating proceeds of approximately $12,914,748. The Form 4 lists a related derivative disposition of 9,000 option units at $0, which reflects the underlying option instrument being surrendered/converted upon exercise.

Key Details

• Transaction date: 2026-02-23; Form 4 filed 2026-02-24 (timely).
• Open‑market sale (S): 9,000 shares at average $1,434.97 — proceeds ≈ $12,914,748. (Footnote F1: average price reported; detailed per‑share prices available on request.)
• Option exercise (M): 9,000 shares acquired at $42.50 each — total exercise cost $382,500.
• Derivative entry (M, disposed): 9,000 option units listed at $0, indicating surrender/conversion of the options on exercise.
• Shares owned after the transactions: not specified in the filing.
• Footnote F2: Options were granted 03/07/2018, vested ratably over three years and were fully vested as of 04/01/2021.

Context
This was an exercise of long‑vested options (granted in 2018, fully vested by 2021) accompanied by an immediate market sale of the resulting shares. Exercises followed by same‑day sales are common ways for insiders to realize gains; the filing shows both the acquisition via exercise and the subsequent sale on the same date. The sale of 9,000 shares for roughly $12.9M is a significant disposition but the filing does not provide post‑transaction share ownership, so readers cannot infer remaining insider holdings from this report alone.