Key facts
- This page summarizes William P. Stiritz's Form 4 filing for Post Holdings, Inc. (POST).
- 4 reported transactions and 0 derivative rows are listed below.
- Accepted by SEC: 03 Sep 2026, 17:12.
William P. Stiritz - 01 Sep 2026 Form 4 Insider Report for Post Holdings, Inc. (POST)
- Reporting relationship
- Chairman Emeritus
- Issuer ticker
- POST
- Reported as of
- 01 Sep 2026
- Net transaction value
- -$32,289,106
- SEC form
- 4
- Accepted by SEC
- 03 Sep 2026, 17:12:06 UTC
- Prior SEC filing
- 19 Dec 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ Diedre J. Gray, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
William P. Stiritz filed Form 4 for Post Holdings, Inc. (POST) on 03 Sep 2026.
Change
- Previous filing in this sequence was filed on 19 Dec 2025.
- Current net transaction value: -$32,289,106.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001052058
Primary reporting owner
STIRITZ WILLIAM P
- Relationship
- Chairman Emeritus
- Address
- C/O POST HOLDINGS, INC., 2503 S. HANLEY ROAD, ST. LOUIS
- Signature
- /s/ Diedre J. Gray, Attorney-in-Fact
- Signature date
- 03 Sep 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
POST
transaction
Common Stock
Sale
- Transaction value
- $8,353,165
- Shares
- -99,990
- Change %
- -26%
- Price
- $83.54
- Shares after
- 284,142
- Date
- 01 Sep 2026
- Ownership
- By Spouse
- Footnotes
- F1
POST
transaction
Common Stock
Sale
- Transaction value
- $525,298
- Shares
- -6,207
- Change %
- -2.2%
- Price
- $84.63
- Shares after
- 277,935
- Date
- 01 Sep 2026
- Ownership
- By Spouse
- Footnotes
- F2
POST
transaction
Common Stock
Sale
- Transaction value
- $23,391,261
- Shares
- -277,707
- Change %
- -100%
- Price
- $84.23
- Shares after
- 228
- Date
- 02 Sep 2026
- Ownership
- By Spouse
- Footnotes
- F3
POST
transaction
Common Stock
Sale
- Transaction value
- $19,382
- Shares
- -228
- Change %
- -100%
- Price
- $85.01
- Shares after
- 0
- Date
- 02 Sep 2026
- Ownership
- By Spouse
POST
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 4,334,667
- Date
- 01 Sep 2026
- Ownership
- Direct
POST
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 169,369
- Date
- 01 Sep 2026
- Ownership
- By Trust
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 3 footnotes
Footnote F1
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.26 to $84.17 per share. The Reporting Person undertakes to provide to Post Holdings, Inc. (the "Issuer"), any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes (1), (2) and (3) of this Form 4.
Footnote F2
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.29 to $84.795 per share.
Footnote F3
The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.64 to $84.635 per share.