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WILLIAM P STIRITZ

CIK 1052058 · Chairman and CEO · last filed 2026-09-03

WILLIAM P STIRITZ is a Chairman and CEO who has filed 199 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing shows the insider sold $32.3M of POST on Sep 3, 2026. Across all open-market trades the lifetime net is +$51.1M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $441.5M across reported positions. 116 SEC filings were submitted jointly with Post Holdings, Inc.

"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

$441.52M

Companies

4

Total Filings

199

Lifetime Open-Market Net

$51.12M

Filer Profile

Reported Address
C/O POST HOLDINGS, INC.
2503 S. HANLEY ROAD
ST LOUIS, MO 63144
Related Filers
Post Holdings, Inc. — 116 joint filings, latest 2026-08-31
PERSONAL CARE Co EDGEWELL — 45 joint filings, latest 2009-02-13
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
POST Director 4,504,036 $84.64 $381.22M $59.73M 108 2026-09-03
RALCORP HOLDINGS INC /MO (RAH) Delisted Director 742,010 — — -$23.44M 74 2012-02-02
MTN Director 11,338 $134.96 $1.53M $0 6 2009-09-24
ENR Director 2,768,307 $21.23 $58.77M $14.83M 8 2008-04-23

Recent Filings

199 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
2026-09-03 POST Sell (S) −384,132 -$32.29M EDGAR
2026-08-31 POST Notice (144) −384,132 -$32.79M EDGAR
2025-12-19 POST Mixed — -$18.39M EDGAR
2025-12-18 POST Grant (A) — $0 EDGAR
2025-12-02 POST Grant (A) — $0 EDGAR
2025-11-04 POST Grant (A) — $0 EDGAR
2025-10-02 POST Grant (A) — $0 EDGAR
2025-09-03 POST Grant (A) — $0 EDGAR
2025-08-21 POST Buy (P) +36,000 $3.94M EDGAR
2025-08-04 POST Grant (A) — $0 EDGAR
Showing 1–10 of 199
Page 1 of 20
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.