Security key
737446104
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 45,495,124
- Total 13F value
- $4,493,148,687
- Share change
- -1,894,600
- Put/Call ratio
- 291%
- SEC-reported price per share
- $98.86
- Number of holders
- 426
- Value change
- -$187,605,396
- Number of buys
- 196
- Number of sells
- 203
- Shares outstanding
- 45,412,505
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
426
Top holders
10
POST full security history
Ownership snapshot
Full 13F holder table
Post Holdings, Inc. SEC filings
Post Holdings, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of POST - Post Holdings, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
William P. Stiritz
Disclosed value leader
William P. Stiritz
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
3/4/5
13F
Lead comparable stake: 10%
13D/G row: William P. Stiritz
Showing 1-6 of 15 holder rows.
Quick read
William P. Stiritz leads the comparable SEC ownership view at 10%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens William P. Stiritz's linked filing trail.
Comparable ownership
Top 5
William P. Stiritz
10%
Route One Investment Company, L.P.
6.5%
DIMENSIONAL FUND ADVISORS LP
6.4%
JPMORGAN CHASE & CO
5.1%
Clarkston Capital Partners, LLC
2.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| William P. Stiritz |
13D/G
3/4/5
Chairman Emeritus
|
10%
|
$539,404,522
4,885,468 shares
|
+$276,025 | 04 Mar 2026 |
| Route One Investment Company, L.P. |
13F
13D/G
Company
|
6.5%
from 13D/G
|
$310,667,155
3,136,468 shares
|
— | 31 Dec 2025 |
| DIMENSIONAL FUND ADVISORS LP |
13D/G
13F
Company
|
6.4%
|
$303,685,562
3,071,875 shares
|
+$25,649,425 | 31 Mar 2026 |
| JPMORGAN CHASE & CO |
13D/G
13F
Company
|
5.1%
|
$299,943,791
2,790,694 shares
|
$0 | 30 Sep 2025 |
| Clarkston Capital Partners, LLC |
13F
13D/G
Company
|
2.6%
from 13D/G
|
$284,111,751
2,868,367 shares
|
— | 31 Dec 2025 |
| Bradly A. Harper |
3/4/5
SVP, CHIEF ACCTING OFFICER
|
0.03%
|
$1,269,509
12,406 shares
mixed-class rows
|
-$160,304 | 09 Jan 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
426
Shares
45,495,124
Rows available
426
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
426
Q1 2026 holders
426
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|