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William S. Corey Jr.

CIK 1815639 · last filed 2026-05-08

William S. Corey Jr. is a corporate insider who has filed 12 SEC Form 4 insider transactions across 2 companies since 2020. The most recent filing, for STC, was dated May 8, 2026. Across all open-market trades the lifetime net is +$28.5K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $772.1K 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

$772.1K

Companies

2

Total Filings

12

Lifetime Open-Market Net

$28.5K

Filer Profile

Reported Address
C/O STEWART INFORMATION SERVICES CORP.
1360 POST OAK BLVD., SUITE 100 MC-14-1
HOUSTON, TX 77056
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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
STC Director 11,433 $67.53 $772.1K $0 7 2026-05-08
GSE SYSTEMS INC (GVP) Delisted Director 26,422 $4.59 $121.3K $28.5K 5 2023-06-14

Recent Filings

12 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
2026-05-08 STC Grant (A) +1,791 $0 EDGAR
2025-05-09 STC Grant (A) +1,706 $0 EDGAR
2024-05-09 STC Grant (A) +1,362 $0 EDGAR
2023-06-14 GSE SYSTEMS INC (GVP) Delisted Grant (A) +136,090 $0 EDGAR
2023-05-18 STC Grant (A) +1,948 $0 EDGAR
2022-06-16 GSE SYSTEMS INC (GVP) Delisted Grant (A) +46,560 $0 EDGAR
2022-05-27 STC Grant (A) +1,509 $0 EDGAR
2021-06-16 GSE SYSTEMS INC (GVP) Delisted Grant (A) +31,250 $0 EDGAR
2021-06-01 STC Grant (A) +1,415 $0 EDGAR
2020-12-10 GSE SYSTEMS INC (GVP) Delisted Buy (P) +25,000 $28.5K EDGAR
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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.