Who
William J. Sandbrook
Director
Company insider
Files Form 4 as: Director, Knife Riv Holding Co; Director, Comfort Systems USA; Chairman and CEO, U.S. Concrete.
In numbers
- Trades disclosed
- 194
- Buys
- 11
- Sells
- 41
- Bought
- $1.3M
- Sold
- $31.3M
- Companies
- 3
- Companies where not an officer
- 2
- First trade
- 22 Aug 2011
- Last trade
- 20 May 2026
- Last filed
- 21 May 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 20 May 2026filed 21 May 2026 | KNF Knife Riv Holding CoDiversified & Base Metal Miners | SEC FORM 4 Code A | —2,040 at $0.00 | filing |
| 20 May 2026filed 21 May 2026 | KNF Knife Riv Holding CoDiversified & Base Metal Miners | SEC FORM 4 Code A | —2,040 at $0.00 | filing |
| 18 May 2026filed 19 May 2026 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Code A | —105 at $0.00 | filing |
| 18 May 2026filed 19 May 2026 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Code A | —105 at $0.00 | filing |
| 29 Apr 2026filed 30 Apr 2026 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $2.6M1,500 at $1,732.67 | filing |
| 29 Apr 2026filed 30 Apr 2026 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $2.6M1,500 at $1,732.67 | filing |
| 24 Feb 2026filed 26 Feb 2026 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $3.6M2,500 at $1,443.32 | filing |
| 24 Feb 2026filed 26 Feb 2026 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $3.6M2,500 at $1,443.32 | filing |
| 10 Sep 2025filed 10 Sep 2025 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $587K800 at $733.56 | filing |
| 9 Sep 2025filed 10 Sep 2025 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $425K600 at $708.97 | filing |
| 9 Sep 2025filed 10 Sep 2025 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $71K100 at $706.00 | filing |
| 25 Aug 2025filed 27 Aug 2025 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $483K700 at $689.58 | filing |
| 22 May 2025filed 27 May 2025 | KNF Knife Riv Holding CoDiversified & Base Metal Miners | SEC FORM 4 Code A | —1,551 at $0.00 | filing |
| 16 May 2025filed 20 May 2025 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Code A | —342 at $0.00 | filing |
| 17 May 2024filed 21 May 2024 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Code A | —498 at $0.00 | filing |
| 15 May 2024filed 16 May 2024 | KNF Knife Riv Holding CoDiversified & Base Metal Miners | SEC FORM 4 Code A | —1,905 at $0.00 | filing |
| 15 May 2024filed 16 May 2024 | KNF Knife Riv Holding CoDiversified & Base Metal Miners | SEC FORM 4 Code A | $56K720 at $77.19 | filing |
| 15 Nov 2023filed 16 Nov 2023 | KNF Knife Riv Holding CoDiversified & Base Metal Miners | SEC FORM 4 Code A | $87K1,519 at $57.57 | filing |
| 9 Nov 2023filed 13 Nov 2023 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $926K5,000 at $185.19 | filing |
| 12 Sep 2023filed 14 Sep 2023 | FIX Comfort Systems USAEngineering & Construction | SEC FORM 4 Sold | $1.4M7,500 at $187.52 | filing |
News
Comfort Systems USA (FIX) Set to Announce Quarterly Earnings on ThursdayFIX · dailypolitical.com · 20 Oct 2026
0 headlines in the last 90 days name William J. Sandbrook; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.