William J. Sandbrook
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
Award(A)Direct2K shares- - May 18, 2026FIX
COMFORT SYSTEMS USA INC
Award(A)Direct105 shares- - Apr 29, 2026FIX
COMFORT SYSTEMS USA INC
Sale(S)Direct1.5K shares at avg. $1732.67$2.6M - Feb 24, 2026FIX
COMFORT SYSTEMS USA INC
Sale(S)Direct2.5K shares at avg. $1443.32$3.6M - Sep 10, 2025FIX
COMFORT SYSTEMS USA INC
Sale(S)Direct800 shares at avg. $733.56$587K - Sep 9, 2025FIX
COMFORT SYSTEMS USA INC
Sale(S)Direct600 shares at avg. $708.97$425K - Sep 9, 2025FIX
COMFORT SYSTEMS USA INC
Sale(S)Direct100 shares at avg. $706.00$71K - Aug 25, 2025FIX
COMFORT SYSTEMS USA INC
Sale(S)Direct700 shares at avg. $689.58$483K - May 22, 2025KNF
Knife River Corp
Award(A)Direct1.6K shares- - May 16, 2025FIX
COMFORT SYSTEMS USA INC
Award(A)Direct342 shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 20, 2026 |  KNF Knife River Corp | Award(A) | 2,040 | - | $0 | Direct |
| May 18, 2026 |  FIX COMFORT SYSTEMS USA INC | Award(A) | 105 | - | $0 | Direct |
| Apr 29, 2026 | FIX COMFORT SYSTEMS USA INC | Sale(S) | 1,500 | $1732.67 | $2,599,000 | Direct |
| Feb 24, 2026 | FIX COMFORT SYSTEMS USA INC | Sale(S) | 2,500 | $1443.32 | $3,608,294 | Direct |
| Sep 10, 2025 | FIX COMFORT SYSTEMS USA INC | Sale(S) | 800 | $733.56 | $586,847 | Direct |
| Sep 9, 2025 | FIX COMFORT SYSTEMS USA INC | Sale(S) | 600 | $708.97 | $425,382 | Direct |
| Sep 9, 2025 | FIX COMFORT SYSTEMS USA INC | Sale(S) | 100 | $706.00 | $70,600 | Direct |
| Aug 25, 2025 | FIX COMFORT SYSTEMS USA INC | Sale(S) | 700 | $689.58 | $482,703 | Direct |
| May 22, 2025 | KNF Knife River Corp | Award(A) | 1,551 | - | - | Direct |
| May 16, 2025 | FIX COMFORT SYSTEMS USA INC | Award(A) | 342 | - | - | Direct |
1-10 of 10 transactions
About SANDBROOK WILLIAM J
SANDBROOK WILLIAM J (SEC CIK 0001527678) files insider reports with the SEC as Director of Knife River Corp (KNF) and Director of COMFORT SYSTEMS USA INC (FIX).
Signal8 holds 8 ownership filings by SANDBROOK WILLIAM J, all Form 4s, filed between May 20, 2025 and May 21, 2026. Those filings report 10 transactions, from May 16, 2025 to May 20, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on SANDBROOK WILLIAM J's filings is in HOUSTON, TX.
Recent filings by SANDBROOK WILLIAM J
- May 20, 2026: Grant or award of KNF shares (Form 4, code A).
- May 18, 2026: Grant or award of FIX shares (Form 4, code A).
- Apr 29, 2026: Open-market sale of FIX shares (Form 4, code S).
- Feb 24, 2026: Open-market sale of FIX shares (Form 4, code S).
- Sep 10, 2025: Open-market sale of FIX shares (Form 4, code S).
Other insiders filing for Knife River Corp (KNF)
- Fagg Karen B, Director
- MOSS PATRICIA L, Director
- Hill Thomas W., Director
- Chiodo Patricia, Director
- Carmona-Alvarez German, Director
- Rebstock Peggy S., VP, CAO and Controller