As of November 6, 2026, Post Holdings, Inc. is a publicly traded company (NYSE: POST). The largest holder reporting an active stake on Schedule 13D is William P. Stiritz, at 10.3%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Passive holders reporting on Schedule 13G include Route One Investment Company, L.P. (6.5%), Dimensional (6.4%), JPMorgan Chase (5.1%) (Schedule 13D/A, March 5, 2026).
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Is Post Holdings, Inc. a real, registered company?
- Post Holdings Inc files with the SEC under CIK 1530950 (its SEC filings).
- Its shares are listed under the ticker POST on NYSE (SEC company record).
- Incorporated in Missouri; business address in St. Louis, Missouri, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Post Holdings Inc in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Nicolas Catoggio, President and Chief Executive Officer (Form 8-K filed 2026-05-07). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Vanguard (filed 2026-10-30).
Who are Post Holdings, Inc.'s owners and officers?
Post Holdings, Inc.: incorporated in Missouri; business address in St. Louis, Missouri; industry Grain Mill Products (Schedule 13G, 2026-10-30).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-10-30 | Vanguard Portfolio Management | 5.09% |
| Schedule 13G/A, 2026-07-31 | Vanguard Portfolio Management | 4.87% |
| Schedule 13G/A, 2026-05-14 | Clarkston Capital Partners, LLC | 2.63% |
| Schedule 13G/A, 2026-05-14 | Route One Investment Company, L.P. | 6.5% |
| Schedule 13G, 2026-04-29 | Vanguard Portfolio Management | 5.12% |
| Schedule 13G/A, 2026-04-09 | Dimensional Fund Advisors LP | 6.4% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13D/A, 2026-03-05 | William P. Stiritz | 10.3% |
| Schedule 13G, 2025-10-31 | Jpmorgan Chase & Co. | 5.1% |
| Schedule 13D/A, 2025-10-15 | William P. Stiritz | 9.3% |
| Schedule 13G, 2025-10-09 | Dimensional Fund Advisors LP | 5.2% |
| Schedule 13G/A, 2025-09-08 | The Vanguard Group | 10.3% |
Questions about who owns Post Holdings, Inc.
Who owns Post Holdings, Inc.?
On this page, 5 holders' latest ownership filings report 5% or more of Post Holdings, Inc.: William P. Stiritz (10.3%, Schedule 13D/A, filed 2026-03-05), Route One Investment Company, L.P. (6.5%, Schedule 13G/A, filed 2026-05-14), Dimensional Fund Advisors LP (6.4%, Schedule 13G/A, filed 2026-04-09), Jpmorgan Chase & Co. (5.1%, Schedule 13G, filed 2025-10-31) and Vanguard Portfolio Management (5.09%, Schedule 13G, filed 2026-10-30).
Who are the largest shareholders of Post Holdings, Inc.?
By the share each holder's latest filing reports, the largest holders of Post Holdings, Inc. on this page are William P. Stiritz (10.3%), Route One Investment Company, L.P. (6.5%) and Dimensional Fund Advisors LP (6.4%).
When did William P. Stiritz buy into Post Holdings, Inc.?
The filings give report dates, not purchase dates. The earliest filing from William P. Stiritz on this page is the Schedule 13D/A, filed 2025-10-15, reporting 9.3%; its latest, Schedule 13D/A filed 2026-03-05, reports 10.3%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-05-07 | Nicolas Catoggio | President and Chief Executive Officer | appointed |
Which insiders own Post Holdings, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- William P. Stiritz: 4,504,036 shares (10.2% of shares outstanding), 4,334,667 held directly and 169,369 indirectly (Form 4, 2026-09-03).
- , the chairman and a director: 1,279,993 shares (2.9% of shares outstanding), 1,053,873 held directly and 226,120 indirectly (Form 4, 2026-10-26).
- , the general counsel and executive vice president: 266,322 shares (0.61% of shares outstanding), 55,580 held directly and 210,742 indirectly (Form 4, 2026-10-26).
- , the president and foodservice: 236,110.826 shares (0.54% of shares outstanding), 218,667 held directly and 17,443.826 indirectly (Form 4, 2026-10-26).
- , a director: 222,363 shares (0.51% of shares outstanding), 24,577 held directly and 197,786 indirectly (Form 4, 2026-10-26).
Shares outstanding: 43,956,805 as of 2026-08-03, from the company's latest SEC cover page.
How much has Post Holdings, Inc. raised?
No fundraising or offering filing from Post Holdings, Inc. is on file with us.
Keep reading
More on Post Holdings Inc and the records around it.
Post Holdings Inc elsewhere on the record
- 5%+ stake filings Oct 2026
- Leadership changes Aug 2026
Companies that share a holder
- Route One Investment Company, L.P. also filed stake reports on 1 other company: Herbalife Ltd. (Oct 2025)
- Clarkston Capital Partners, LLC also filed stake reports on 8 other companies: CLARIVATE PLC (May 2026), ENERGIZER HOLDINGS, INC. (May 2026), JOHN WILEY & SONS, INC. (May 2026)
- JPMORGAN CHASE & CO. also filed stake reports on 116 other companies: LEVI STRAUSS & CO (Nov 2026), Warner Music Group Corp. (Nov 2026), Andersen Group Inc. (Oct 2026)
Related pages
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https://mentionfox.com/who-owns/post