SANDBROOK WILLIAM J
SEC insider (Form 3/4/5 filer). CIK 0001527678. Director at Knife River Corp (KNF) and 1 other issuer. 10 reported Form 4/5 transactions since Sep 2024; latest on May 20, 2026. Located in HOUSTON, TX.
Companies SANDBROOK WILLIAM J has filed insider reports for
- Knife River Corp (KNF): Director
- COMFORT SYSTEMS USA INC (FIX): Director
SANDBROOK WILLIAM J
CIK: 0001527678
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (10 total)
- May 20, 2026KNF
Knife River Corp
AwardDirect2K shares- - May 18, 2026FIX
COMFORT SYSTEMS USA INC
AwardDirect105 shares- - Apr 29, 2026FIX
COMFORT SYSTEMS USA INC
SaleDirect1.5K shares at avg. $1732.67$2.6M - Feb 24, 2026FIX
COMFORT SYSTEMS USA INC
SaleDirect2.5K shares at avg. $1443.32$3.6M - Sep 10, 2025FIX
COMFORT SYSTEMS USA INC
SaleDirect800 shares at avg. $733.56$587K - Sep 9, 2025FIX
COMFORT SYSTEMS USA INC
SaleDirect600 shares at avg. $708.97$425K - Sep 9, 2025FIX
COMFORT SYSTEMS USA INC
SaleDirect100 shares at avg. $706.00$71K - Aug 25, 2025FIX
COMFORT SYSTEMS USA INC
SaleDirect700 shares at avg. $689.58$483K - May 22, 2025KNF
Knife River Corp
AwardDirect1.6K shares- - May 16, 2025FIX
COMFORT SYSTEMS USA INC
AwardDirect342 shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 20, 2026 |  KNF Knife River Corp | Award | 2,040 | - | $0 | Direct |
| May 18, 2026 |  FIX COMFORT SYSTEMS USA INC | Award | 105 | - | $0 | Direct |
| Apr 29, 2026 | FIX COMFORT SYSTEMS USA INC | Sale | 1,500 | $1732.67 | $2,599,000 | Direct |
| Feb 24, 2026 | FIX COMFORT SYSTEMS USA INC | Sale | 2,500 | $1443.32 | $3,608,294 | Direct |
| Sep 10, 2025 | FIX COMFORT SYSTEMS USA INC | Sale | 800 | $733.56 | $586,847 | Direct |
| Sep 9, 2025 | FIX COMFORT SYSTEMS USA INC | Sale | 600 | $708.97 | $425,382 | Direct |
| Sep 9, 2025 | FIX COMFORT SYSTEMS USA INC | Sale | 100 | $706.00 | $70,600 | Direct |
| Aug 25, 2025 | FIX COMFORT SYSTEMS USA INC | Sale | 700 | $689.58 | $482,703 | Direct |
| May 22, 2025 | KNF Knife River Corp | Award | 1,551 | - | - | Direct |
| May 16, 2025 | FIX COMFORT SYSTEMS USA INC | Award | 342 | - | - | Direct |
1-10 of 10 transactions