Post Holdings, Inc. (POST)
NYSE: POST · Grain Mill Products · St. Louis, MO · filing with the SEC since 2011
Grade5.3
◀ Past 5.2● Present 5.7▶ Future 5.0
Who owns Post Holdings, Inc.
As filed with the SECHolders of 5% or more
4
William P. Stiritz holds 10.3% of Common Stock, $0.01 par value, as its SCHEDULE 13D/A filed Mar 5, 2026 says.
Directors and officers
16
report now, of 24 people on the record since 2012. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
William P. Stiritz
SCHEDULE 13D/A · filed Mar 5, 2026 · Common Stock, $0.01 par value · 9.3% in Oct 15, 2025
Route One Investment Company, L.P.
SCHEDULE 13G/A · filed May 14, 2026 · Common Stock · 6.1% in Aug 13, 2025
Dimensional Fund Advisors LP
SCHEDULE 13G/A · filed Apr 9, 2026 · Common Stock · 5.2% in Oct 9, 2025
JPMorgan Chase & Co.
SCHEDULE 13G · filed Oct 31, 2025 · Common Stock, $0.01 par value per share
Vanguard Portfolio Management
SCHEDULE 13G/A · filed Jul 31, 2026 · Common Stock · reported falling below 5%, from 5.12% in Apr 29, 2026
Clarkston Capital Partners, LLC
SCHEDULE 13G/A · filed May 14, 2026 · Common Stock · reported falling below 5%
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%, from 10.3% in Sep 8, 2025
What POST reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
8th Avenue
A company bought · acquisition · Jun 2025 · owns, named in the 10-K filed Nov 21, 2025
Ppi
A company bought · acquisition · Feb 2025 · owns, named in the 10-K filed Nov 21, 2025
Pet Food
A company bought · acquisition · owns, named in the 10-K filed Nov 21, 2025
74 subsidiaries in 9 countries, from the list filed with the 10-K filed Nov 21, 2025.
Insider tradesForm 4
8sales
1purchases
0sales on a scheduled plan
4people selling
$34.9Msold, in dollars
$200,000bought, in dollars
Open-market trades on Form 4 from Nov 3, 2025 to Nov 3, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 3, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window5 of 24 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Stiritz William P | Chairman and CEO | 4 | $32.3M | 0 | 0 | $0 |
| Curl Gregory L | director | 2 | $1.4M | 0 | 0 | $0 |
| Catoggio Nicolas | PRES & CEO | 1 | $1.0M | 0 | 0 | $0 |
| Harper Bradly A | SVP, CHIEF ACCTING OFFICER | 1 | $200,000 | 0 | 0 | $0 |
| Kemper David W | director | 0 | $0 | 0 | 1 | $200,000 |