Quick Takeaways
- William P. Stiritz filed SCHEDULE 13D/A for Post Holdings, Inc. Common Stock, $0.01 par value (POST).
- Disclosed ownership: 10%.
- Date of event: 04 Mar 2026.
William P. Stiritz - 04 Mar 2026 SCHEDULE 13D/A Report for Post Holdings, Inc. Common Stock, $0.01 par value (POST)
- Filing Manager
- William P. Stiritz
- Reporting Manager
- William P. Stiritz
- Symbol
- POST
- Shares outstanding
- 47,431,728 shares
- Disclosed Ownership
- 4,885,468 shares
- Ownership
- 10%
- Form type
- SCHEDULE 13D/A
- Filing time
- 05 Mar 2026, 16:41:06 UTC
- Date of event
- 04 Mar 2026
- Previous filing
- 15 Oct 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"William P. Stiritz disclosed 10% ownership in Post Holdings, Inc. Common Stock, $0.01 par value (POST) on 04 Mar 2026."
What Changed
- Previous schedule filing date: 15 Oct 2025.
- Current filing was accepted on 05 Mar 2026, 16:41.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Official SEC Source
Backed by Schedule 13D/13G
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
See Original FilingReporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| William P. Stiritz | 10% | 4,885,468 | 4,501,336 | 384,132 | /s/ William P. Stiritz | William P. Stiritz | 0001052058 |