Time on boards
- Boards served
- 3
- Current seats
- 3
- Board service
- 9 years
- Director since
- 2023
9 years of board service in total across 3 boards, counting each seat separately. Longest: Comfort Systems USA Inc., 3 years.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
Knife Riv Holding Co. May 22, 202592.7%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| May 20, 2026 | Knife Riv Holding Co. | Grant or award | +2,040 | — | — |
| May 18, 2026 | Comfort Systems USA Inc. | Grant or award | +105 | — | — |
| Apr 29, 2026 | Comfort Systems USA Inc. | Open-market sale | −1,500 | $1,732.67 | $2,599,005 |
| Feb 24, 2026 | Comfort Systems USA Inc. | Open-market sale | −2,500 | $1,443.32 | $3,608,300 |
| Sep 10, 2025 | Comfort Systems USA Inc. | Open-market sale | −800 | $733.56 | $586,848 |
| Sep 9, 2025 | Comfort Systems USA Inc. | Open-market sale | −600 | $708.97 | $425,382 |
| Sep 9, 2025 | Comfort Systems USA Inc. | Open-market sale | −100 | $706.00 | $70,600 |
| Aug 25, 2025 | Comfort Systems USA Inc. | Open-market sale | −700 | $689.58 | $482,706 |
| May 22, 2025 | Knife Riv Holding Co. | Grant or award | +1,551 | — | — |
| May 16, 2025 | Comfort Systems USA Inc. | Grant or award | +342 | — | — |
| May 17, 2024 | Comfort Systems USA Inc. | Grant or award | +498 | — | — |
| May 15, 2024 | Knife Riv Holding Co. | Grant or award | +1,905 | — | — |
| May 15, 2024 | Knife Riv Holding Co. | Grant or award | +720 | $77.19 | $55,577 |
| Nov 15, 2023 | Knife Riv Holding Co. | Grant or award | +1,519 | $57.57 | $87,449 |
| Nov 9, 2023 | Comfort Systems USA Inc. | Open-market sale | −5,000 | $185.19 | $925,950 |
Questions about William J. Sandbrook
What boards is William J. Sandbrook on?
William J. Sandbrook sits on the boards of Andretti Acquisition Corp. II, Comfort Systems USA Inc. and Knife Riv Holding Co.
How long has William J. Sandbrook served on boards?
Our records show at least 9 years of board service across 3 boards, the earliest from 2023.
Reviews (0)
Sign in to write a review.
No reviews yet. Be the first to write one.