Key facts
- This page summarizes William P. Stiritz's Form 4 filing for Post Holdings, Inc. (POST).
- 6 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 19 Dec 2025, 19:19.
William P. Stiritz - 17 Dec 2025 Form 4 Insider Report for Post Holdings, Inc. (POST)
- Reporting relationship
- Chairman Emeritus
- Issuer ticker
- POST
- Reported as of
- 17 Dec 2025
- Net transaction value
- -$18,390,840
- SEC form
- 4
- Accepted by SEC
- 19 Dec 2025, 19:19:39 UTC
- Prior SEC filing
- 18 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 19 Dec 2025.
Change
- Previous filing in this sequence was filed on 18 Dec 2025.
- Current net transaction value: -$18,390,840.
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
- 19 Dec 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
POST
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +10,703
- Change %
- +0.25%
- Price
- Shares after
- 4,345,370
- Date
- 17 Dec 2025
- Ownership
- Direct
- Footnotes
- F1
POST
transaction
Common Stock
Disposed to Issuer
- Transaction value
- $1,083,059
- Shares
- -10,703
- Change %
- -0.25%
- Price
- $101.19
- Shares after
- 4,334,667
- Date
- 17 Dec 2025
- Ownership
- Direct
- Footnotes
- F1
POST
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +170,001
- Change %
- +3.9%
- Price
- Shares after
- 4,504,668
- Date
- 18 Dec 2025
- Ownership
- Direct
- Footnotes
- F1
POST
transaction
Common Stock
Disposed to Issuer
- Transaction value
- $17,307,781
- Shares
- -170,001
- Change %
- -3.8%
- Price
- $101.81
- Shares after
- 4,334,667
- Date
- 18 Dec 2025
- Ownership
- Direct
- Footnotes
- F1
POST
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 169,369
- Date
- 17 Dec 2025
- Ownership
- By Trust
POST
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 384,132
- Date
- 17 Dec 2025
- Ownership
- By Spouse
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
POST
transaction
Derivative
Post Holdings, Inc. Stock Equivalents
Options Exercise
- Transaction value
- Shares
- -10,703
- Change %
- -5.9%
- Price
- Shares after
- 170,001
- Date
- 17 Dec 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 10,703
- Exercise price
- Footnotes
- F1
POST
transaction
Derivative
Post Holdings, Inc. Stock Equivalents
Options Exercise
- Transaction value
- Shares
- -170,001
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 18 Dec 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 170,001
- Exercise price
- Footnotes
- F1
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 1 footnote
Footnote F1
Upon Reporting Person's retirement from the Board of Directors of Post Holdings, Inc. ("Post") on December 16, 2025, the Reporting Person's earned retainers as a Director of Post that were deferred into Post stock equivalents under Post's Deferred Compensation Plan for Non-Management Directors (the "Plan") were converted into cash as soon as administratively practicable following his retirement pursuant to the terms of the Plan. Each stock equivalent was the economic equivalent of one share of Post common stock. The cash will be distributed to the Reporting Person in accordance with the applicable elections previously made by the Reporting Person, including lump sum payout at his retirement, in five annual installments following his retirement and in ten annual installments following his retirement.