SANDBROOK WILLIAM J (CIK 1527678) reported 11 SEC Form 4 insider transactions across 3 companies over the past 18 months (most recent 2026-09-09). Recent activity: Buy POLE (5.7M shares), Buy KNF (2,040 shares), Buy FIX (105 shares), Sell FIX (1,500 shares), Sell FIX (2,500 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-09 | Andretti Acquisition Corp. II (POLE) | Executive Chairman | Buy | 5.7M | $0 |
| 2026-05-21 | Knife River Corp (KNF) | Director | Buy | 2,040 | $0 |
| 2026-05-19 | COMFORT SYSTEMS USA INC (FIX) | Director | Buy | 105 | $0 |
| 2026-04-30 | COMFORT SYSTEMS USA INC (FIX) | Director | Sell | 1,500 | $2.6M |
| 2026-02-26 | COMFORT SYSTEMS USA INC (FIX) | Director | Sell | 2,500 | $3.6M |
| 2025-09-10 | COMFORT SYSTEMS USA INC (FIX) | Director | Sell | 600 | $425,382 |
| 2025-09-10 | COMFORT SYSTEMS USA INC (FIX) | Director | Sell | 100 | $70,600 |
| 2025-09-10 | COMFORT SYSTEMS USA INC (FIX) | Director | Sell | 800 | $586,848 |
| 2025-08-27 | COMFORT SYSTEMS USA INC (FIX) | Director | Sell | 700 | $482,706 |
| 2025-05-27 | Knife River Corp (KNF) | Director | Buy | 1,551 | $0 |
| 2025-05-20 | COMFORT SYSTEMS USA INC (FIX) | Director | Buy | 342 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-09-09