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WILLIAM J SANDBROOK

CIK 1527678 · See Remarks · last filed 2026-05-21

WILLIAM J SANDBROOK is a corporate insider who has filed 104 SEC Form 4 insider transactions across 3 companies since 2018. The most recent filing, for KNF, was dated May 21, 2026. Across all open-market trades the lifetime net is −$9.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $13.8M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$13.82M

Companies

3

Total Filings

104

Lifetime Open-Market Net

-$9.64M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
KNF Director 7,735 $67.52 $522.3K $0 4 2026-05-21
FIX Director 7,941 $1674.84 $13.30M -$9.64M 17 2026-05-19
Zapata Quantum, Inc. (WNNR.U) Delisted See Remarks — $14.00 — $0 1 2022-01-20

Recent Filings

104 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-05-21 KNF Grant (A) +2,040 $0 EDGAR
2026-05-19 FIX Grant (A) +105 $0 EDGAR
2026-04-30 FIX Sell (S) −1,500 -$2.60M EDGAR
2026-04-29 FIX Notice (144) −1,500 -$2.60M EDGAR
2026-02-26 FIX Sell (S) −2,500 -$3.61M EDGAR
2026-02-24 FIX Notice (144) −2,500 -$3.61M EDGAR
2025-09-10 FIX Sell (S) −1,500 -$1.08M EDGAR
2025-09-10 FIX Notice (144) −800 -$586.8K EDGAR
2025-09-09 FIX Notice (144) −700 -$496.0K EDGAR
2025-08-27 FIX Sell (S) −700 -$482.7K EDGAR
Showing 1–10 of 104
Page 1 of 11
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.