Who owns POST (POST)
Which tracked institutional funds hold POST, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See POST company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
88 tracked funds added or opened POST while 85 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
POST’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes POST more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in POST divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 425 tracked filers holding POST, 202 increased or opened the position and 212 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in POST between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 25
- VANGUARD PORTFOLIO MANAGEMENT LLC$240M
- VANGUARD CAPITAL MANAGEMENT LLC$185M
- Junto Capital Management LP$40M
- VANGUARD FIDUCIARY TRUST CO$26M
- Cambria Investment Management, L.P.$9M
- Trexquant Investment LP$8M
Full exits 19
- VANGUARD GROUP INC$503M
- TWO SIGMA ADVISERS, LP$78M
- SCHRODER INVESTMENT MANAGEMENT GROUP$19M
- ADAMS DIVERSIFIED EQUITY FUND, INC.$10M
- KNIGHTSBRIDGE ASSET MANAGEMENT, LLC$8M
- CIBC Private Wealth Group LLC$4M
Largest adds
- TWO SIGMA INVESTMENTS, LP$66M
- Holocene Advisors, LP$60M
- UBS Group AG$42M
- T. Rowe Price Investment Management, Inc.$39M
- Point72 Asset Management, L.P.$34M
- Fisher Asset Management, LLC$21M
Largest trims
- BlackRock, Inc.$189M
- Clarkston Capital Partners, LLC$166M
- JPMORGAN CHASE & CO$35M
- THOMPSON SIEGEL & WALMSLEY LLC$27M
- Route One Investment Company, L.P.$19M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$16M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP added | 3,071,875 | $304M | 6.1% | 2026-Q1 |
| Route One Investment Company, L.P. trimmed | 2,950,568 | $292M | 5.8% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 2,668,814 | $259M | 5.2% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,431,497 | $240M | 4.8% | 2026-Q1 |
| BlackRock, Inc. trimmed | 2,304,596 | $228M | 4.5% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,874,037 | $185M | 3.7% | 2026-Q1 |
| Holocene Advisors, LP added | 1,766,642 | $175M | 3.5% | 2026-Q1 |
| LONDON CO OF VIRGINIA trimmed | 1,476,638 | $146M | 2.9% | 2026-Q1 |
| STATE STREET CORP trimmed | 1,422,219 | $141M | 2.8% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,392,048 | $138M | 2.7% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 1,263,594 | $125M | 2.5% | 2026-Q1 |
| NORGES BANK trimmed | 1,069,446 | $124M | 2.5% | 2026-Q1 |
| Clarkston Capital Partners, LLC trimmed | 1,193,067 | $118M | 2.4% | 2026-Q1 |
| UBS Group AG added | 1,044,362 | $103M | 2.1% | 2026-Q1 |
| DIAMOND HILL CAPITAL MANAGEMENT INC trimmed | 816,143 | $81M | 1.6% | 2026-Q1 |
| FMR LLC trimmed | 807,289 | $80M | 1.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 806,826 | $80M | 1.6% | 2026-Q1 |
| MORGAN STANLEY trimmed | 795,423 | $79M | 1.6% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 688,419 | $68M | 1.4% | 2026-Q1 |
| Invesco Ltd. trimmed | 511,766 | $51M | 1.0% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 466,298 | $46M | 0.9% | 2026-Q1 |
| Quantinno Capital Management LP added | 462,631 | $46M | 0.9% | 2026-Q1 |
| Fisher Asset Management, LLC added | 458,453 | $45M | 0.9% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 427,198 | $42M | 0.8% | 2026-Q1 |
| Junto Capital Management LP new | 407,608 | $40M | 0.8% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 388,707 | $38M | 0.8% | 2026-Q1 |
| NOMURA HOLDINGS INC added | 358,633 | $35M | 0.7% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 348,909 | $34M | 0.7% | 2026-Q1 |
| PYA Waltman Capital, LLC added | 329,210 | $33M | 0.6% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 325,780 | $32M | 0.6% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 300,794 | $30M | 0.6% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 300,648 | $30M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 261,266 | $26M | 0.5% | 2026-Q1 |
| LOOMIS SAYLES & CO L P added | 258,688 | $26M | 0.5% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 257,566 | $25M | 0.5% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 256,950 | $25M | 0.5% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 252,108 | $25M | 0.5% | 2026-Q1 |
| GAMCO INVESTORS, INC. ET AL trimmed | 229,966 | $23M | 0.5% | 2026-Q1 |
| EULAV Asset Management added | 225,042 | $22M | 0.4% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 222,748 | $22M | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 218,706 | $22M | 0.4% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 205,943 | $20M | 0.4% | 2026-Q1 |
| NATIXIS ADVISORS, LLC added | 204,240 | $20M | 0.4% | 2026-Q1 |
| BRAUN STACEY ASSOCIATES INC added | 200,398 | $20M | 0.4% | 2026-Q1 |
| H Squared Management LP added | 200,387 | $20M | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 196,177 | $19M | 0.4% | 2026-Q1 |
| GABELLI FUNDS LLC trimmed | 186,060 | $18M | 0.4% | 2026-Q1 |
| Artemis Investment Management LLP added | 183,815 | $18M | 0.4% | 2026-Q1 |
| IRIDIAN ASSET MANAGEMENT LLC/CT added | 181,969 | $18M | 0.4% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP added | 187,901 | $18M | 0.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 178,894 | $18M | 0.4% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 171,748 | $17M | 0.3% | 2026-Q1 |
| HANCOCK WHITNEY CORP added | 149,351 | $16M | 0.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 154,964 | $15M | 0.3% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 152,239 | $15M | 0.3% | 2026-Q1 |
| Carnegie Investment Counsel trimmed | 145,887 | $14M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 145,210 | $14M | 0.3% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 144,426 | $14M | 0.3% | 2026-Q1 |
| SEI INVESTMENTS CO added | 140,064 | $14M | 0.3% | 2026-Q1 |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 134,913 | $13M | 0.3% | 2026-Q1 |
| THOMPSON SIEGEL & WALMSLEY LLC trimmed | 127,087 | $13M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 120,115 | $12M | 0.2% | 2026-Q1 |
| Wallace Capital Management Inc. trimmed | 118,168 | $12M | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 116,283 | $11M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 102,443 | $10M | 0.2% | 2026-Q1 |
| HRT FINANCIAL LP added | 100,659 | $10M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 95,548 | $9M | 0.2% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 95,511 | $9M | 0.2% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 94,337 | $9M | 0.2% | 2026-Q1 |
| Cambria Investment Management, L.P. new | 94,029 | $9M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 86,000 | $9M | 0.2% | 2026-Q1 |
| Trexquant Investment LP added | 83,506 | $8M | 0.2% | 2026-Q1 |
| Cohen Capital Management, Inc. | 81,885 | $8M | 0.2% | 2026-Q1 |
| COMMERCE BANK trimmed | 79,529 | $8M | 0.2% | 2026-Q1 |
| XTX Topco Ltd added | 74,386 | $7M | 0.1% | 2026-Q1 |
| HENNESSY ADVISORS INC trimmed | 73,200 | $7M | 0.1% | 2026-Q1 |
| Epoch Investment Partners, Inc. trimmed | 71,189 | $7M | 0.1% | 2026-Q1 |
| BARCLAYS PLC added | 70,695 | $7M | 0.1% | 2026-Q1 |
| Man Group plc added | 65,454 | $6M | 0.1% | 2026-Q1 |
| LSV ASSET MANAGEMENT added | 64,600 | $6M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 62,551 | $6M | 0.1% | 2026-Q1 |
| LGT Fund Management Co Ltd. | 61,812 | $6M | 0.1% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. added | 59,027 | $6M | 0.1% | 2026-Q1 |
| Bridgewater Associates, LP trimmed | 58,852 | $6M | 0.1% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 58,085 | $6M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 5,081,217 | $503M | 10.0% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 785,615 | $78M | 1.6% | 2025-Q4 stale |
| FULLER & THALER ASSET MANAGEMENT, INC. trimmed | 562,284 | $60M | 1.2% | 2025-Q3 stale |
| WEDGE CAPITAL MANAGEMENT L L P/NC trimmed | 283,295 | $31M | 0.6% | 2025-Q2 stale |
| Qube Research & Technologies Ltd added | 219,673 | $24M | 0.5% | 2025-Q3 stale |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 192,517 | $19M | 0.4% | 2025-Q4 stale |
| Duquesne Family Office LLC trimmed | 176,400 | $19M | 0.4% | 2025-Q3 stale |
| RENAISSANCE TECHNOLOGIES LLC added | 143,300 | $15M | 0.3% | 2025-Q3 stale |
| ADAMS DIVERSIFIED EQUITY FUND, INC. trimmed | 105,300 | $10M | 0.2% | 2025-Q4 stale |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC trimmed | 70,152 | $8M | 0.2% | 2025-Q1 stale |
| KNIGHTSBRIDGE ASSET MANAGEMENT, LLC new | 78,486 | $8M | 0.2% | 2025-Q4 stale |
| Corebridge Financial, Inc. trimmed | 50,577 | $6M | 0.1% | 2025-Q1 stale |
| Hudson Bay Capital Management LP added | 53,582 | $6M | 0.1% | 2025-Q2 stale |
| TWINBEECH CAPITAL LP added | 52,873 | $6M | 0.1% | 2025-Q2 stale |
| MARSHALL WACE, LLP trimmed | 52,461 | $6M | 0.1% | 2025-Q2 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.