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William R Thomas III

CIK 1369011 · Vice President · last filed 2026-08-12

William R Thomas III is a Vice President who has filed 55 SEC Form 4 insider transactions across 3 companies since 2008. The most recent filing, for CSWC, was dated Aug 12, 2026. Across all open-market trades the lifetime net is −$10.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $14.6M across reported positions. 52 SEC filings were submitted jointly with CAPITAL SOUTHWEST CORP.

"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

$14.57M

Companies

3

Total Filings

55

Lifetime Open-Market Net

-$10.53M

Filer Profile

Reported Address
12900 PRESTON ROAD
SUITE 700
DALLAS, TX 75230
Related Filers
CAPITAL SOUTHWEST CORP — 52 joint filings, latest 2026-08-12
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
CSWC Director 592,611 $24.58 $14.57M -$10.93M 39 2026-08-12
CAPITAL SOUTHWEST CORP (CSWCZ) Delisted Director 590,283 $25.37 $14.98M $243.1K 4 2025-08-13
ENCORE WIRE CORP (WIRE) Delisted Director 1,250 $289.84 $362.3K $156.1K 11 2024-07-02

Recent Filings

55 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
2026-08-12 CSWC Grant (A) +1,989 $0 EDGAR
2026-06-05 CSWC Notice (144) −4,661 -$108.6K EDGAR
2026-06-05 CSWC Mixed +339 $8.4K EDGAR
2025-08-13 CAPITAL SOUTHWEST CORP (CSWCZ) Delisted Grant (A) +2,193 $0 EDGAR
2024-08-13 CAPITAL SOUTHWEST CORP (CSWCZ) Delisted Grant (A) +2,090 $0 EDGAR
2024-07-02 ENCORE WIRE CORP (WIRE) Delisted Mixed −13,600 -$362.5K EDGAR
2024-06-04 CAPITAL SOUTHWEST CORP (CSWCZ) Delisted Mixed +1,183 $243.1K EDGAR
2024-05-08 ENCORE WIRE CORP (WIRE) Delisted Grant (A) +1,250 $0 EDGAR
2023-08-11 CAPITAL SOUTHWEST CORP (CSWCZ) Delisted Grant (A) +2,240 $0 EDGAR
2023-05-04 ENCORE WIRE CORP (WIRE) Delisted Grant (A) +1,250 $0 EDGAR
Showing 1–10 of 55
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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.