SANDBROOK WILLIAM J — SEC Form 4 filings
SEC reporting owner CIK 1527678. 12 Form 4 filings on record with FilingPulse; latest filed 2026-09-09.
Transaction summary — filings shown
Covers all 12 filings on record, filed 2024-04-01 to 2026-09-09. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 6 legs across 4 filings — 6,200 shares, $7,772,825 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 15.
- Largest priced transaction: sale of 2,500 shares @ $1,443.32 ($3,608,294) in COMFORT SYSTEMS USA INC, filed 2026-02-26.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| COMFORT SYSTEMS USA INC (FIX) | Director | 7 | — | 6 legs · 6,200 sh · $7,772,825 | 3 |
| Zapata Computing Holdings Inc. (ZPTA) | Director, 10% owner | 1 | — | — | 6 |
| Knife River Corp (KNF) | Director | 3 | — | — | 4 |
| Andretti Acquisition Corp. II (POLE) | Executive Chairman, Director, 10% owner | 1 | — | — | 2 |
Form 4 filings — SANDBROOK WILLIAM J
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-09 | 4 | Andretti Acquisition Corp. II (POLE) jointly with Andretti Sponsor II LLC, Andretti Mario, ANDRETTI MICHAEL, Brown William Matthew | Conversion (C): 5,749,999 · Conversion (C): 5,749,999 (derivative) @ $0 | EDGAR |
| 2026-05-21 | 4 | Knife River Corp (KNF) | Grant/award (A): 2,040 @ $0 | EDGAR |
| 2026-05-19 | 4 | COMFORT SYSTEMS USA INC (FIX) | Grant/award (A): 105 @ $0 | EDGAR |
| 2026-04-30 | 4 | COMFORT SYSTEMS USA INC (FIX) | Sale (S): 1,500 @ $1,732.67 | EDGAR |
| 2026-02-26 | 4 | COMFORT SYSTEMS USA INC (FIX) | Sale (S): 2,500 @ $1,443.32 | EDGAR |
| 2025-09-10 | 4 | COMFORT SYSTEMS USA INC (FIX) | Sale (S): 600 @ $708.97 · Sale (S): 100 @ $706 · Sale (S): 800 @ $733.56 | EDGAR |
| 2025-08-27 | 4 | COMFORT SYSTEMS USA INC (FIX) | Sale (S): 700 @ $689.58 | EDGAR |
| 2025-05-27 | 4 | Knife River Corp (KNF) | Grant/award (A): 1,551 @ $0 | EDGAR |
| 2025-05-20 | 4 | COMFORT SYSTEMS USA INC (FIX) | Grant/award (A): 342 @ $0 | EDGAR |
| 2024-05-21 | 4 | COMFORT SYSTEMS USA INC (FIX) | Grant/award (A): 498 @ $0 | EDGAR |
| 2024-05-16 | 4 | Knife River Corp (KNF) | Grant/award (A): 1,905 @ $0 · Grant/award (A): 720 @ $77.19 | EDGAR |
| 2024-04-01 | 4 | Zapata Computing Holdings Inc. (ZPTA) jointly with Andretti Sponsor LLC, ANDRETTI MICHAEL, Brown William Matthew | Other (J): 4,189,077 · Other (J): 652,214 · Grant/award (A): 34,744 · Other (J): 243,368 · Other (J): 370,923 · Other (J): 4,189,077 (derivative) | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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