Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
410 institutional managers reported holding POST for the quarter ended Mar 31, 2026. Together they hold about 79% of shares outstanding; the top 10 hold 43%. 62 opened new positions; 54 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 4.66M | 8.62% | $461.0M | trimmed -10% | ≤2013 |
| BlackRock | 3.98M | 7.36% | $393.4M | trimmed -5.3% | ≤2013 |
| Dimensional Fund Advisors | 3.07M | 5.68% | $303.7M | added +3.9% | ≤2013 |
| Route One Investment Company, L.p. (focused) | 2.95M | 5.45% | $291.7M | trimmed -5.9% | 2013 Q4 |
| Holocene Advisors | 1.77M | 3.27% | $174.6M | added +52.6% | 2023 Q3 |
| London CO OF Virginia | 1.48M | 2.73% | $146.0M | trimmed -6.9% | 2016 Q4 |
| State Street | 1.42M | 2.63% | $140.6M | trimmed -4% | ≤2013 |
| Two Sigma | 1.39M | 2.57% | $137.6M | added +91.7% | 2022 Q4 |
| Manufacturers Life Insurance Company, THE | 1.26M | 2.34% | $124.9M | trimmed -5.5% | ≤2013 |
| Clarkston Capital Partners, LLC | 1.19M | 2.21% | $117.9M | trimmed -58.4% | 2013 Q4 |
| UBS | 1.19M | 2.20% | $117.6M | added +54.8% | ≤2013 |
| FMR (Fidelity) | 831.2k | 1.54% | $82.2M | trimmed -9.6% | ≤2013 |
| Diamond Hill Capital Management INC | 816.1k | 1.51% | $80.7M | trimmed -8.6% | 2013 Q4 |
| Geode Capital | 806.8k | 1.49% | $79.8M | trimmed -8.4% | ≤2013 |
| Morgan Stanley | 795.4k | 1.47% | $78.6M | trimmed -12.6% | ≤2013 |
| T. Rowe Price Investment Management, INC. | 688.4k | 1.27% | $68.1M | added +134.2% | 2022 Q3 |
| Invesco | 560.1k | 1.03% | $55.4M | trimmed -4.7% | ≤2013 |
| Charles Schwab Investment Management | 466.3k | 0.86% | $46.1M | trimmed -6.5% | ≤2013 |
| Quantinno Capital Management LP | 462.6k | 0.85% | $45.7M | added +41.3% | 2022 Q3 |
| Fisher Investments | 458.5k | 0.85% | $45.3M | added +89.4% | 2025 Q1 |
| Point72 | 427.2k | 0.79% | $42.2M | added +416.8% | 2020 Q4 |
| Junto Capital Management LP | 407.6k | 0.75% | $40.3M | opened | 2026 Q1 |
| Northern Trust | 388.7k | 0.72% | $38.4M | trimmed -4.2% | ≤2013 |
| AQR Capital | 350.0k | 0.65% | $34.6M | added +21.5% | 2018 Q4 |
| PYA Waltman Capital, LLC | 329.2k | 0.61% | $32.5M | added +20.8% | 2019 Q4 |
| D. E. Shaw | 325.8k | 0.60% | $32.2M | added +2.5% | ≤2013 |
| Bank OF America CORP /DE/ | 300.8k | 0.56% | $29.7M | added +2.1% | ≤2013 |
| BNY Mellon | 300.6k | 0.56% | $29.7M | trimmed -6.8% | ≤2013 |
| Loomis Sayles & CO L P | 258.7k | 0.48% | $25.6M | added +2.2% | 2014 Q2 |
| Arrowstreet Capital | 257.6k | 0.48% | $25.5M | trimmed -38% | 2024 Q3 |
| Raymond James Financial INC | 256.9k | 0.47% | $25.4M | trimmed -9.7% | 2014 Q3 |
| Victory Capital Management INC | 252.1k | 0.47% | $24.9M | trimmed -8.1% | 2016 Q3 |
| Gamco Investors, INC. et al | 230.0k | 0.42% | $22.7M | trimmed -1.2% | ≤2013 |
| Eulav Asset Management | 225.0k | 0.42% | $22.2M | unchanged | 2024 Q1 |
| Wells Fargo & COMPANY/MN | 222.7k | 0.41% | $22.0M | unchanged | ≤2013 |
| Citadel Advisors | 218.7k | 0.40% | $21.6M | trimmed -12.2% | ≤2013 |
| ExodusPoint | 205.9k | 0.38% | $20.4M | added +76% | 2023 Q2 |
| Natixis Advisors, LLC | 204.2k | 0.38% | $20.2M | added +22.4% | 2015 Q4 |
| Braun Stacey Associates INC | 200.4k | 0.37% | $19.8M | added +5.6% | 2024 Q3 |
| H Squared Management LP (focused) | 200.4k | 0.37% | $19.8M | added +3.8% | 2025 Q4 |
| BNP Paribas Financial Markets | 197.0k | 0.36% | $19.5M | added +3290.7% | ≤2013 |
| Jones Financial Companies Lllp | 187.9k | 0.35% | $18.6M | added +37859.8% | 2024 Q2 |
| GAMCO (Gabelli) | 186.1k | 0.34% | $18.4M | trimmed -3.7% | ≤2013 |
| Artemis Investment Management LLP | 183.8k | 0.34% | $18.2M | added +2.8% | 2025 Q2 |
| Iridian Asset Management LLC/CT (focused) | 182.0k | 0.34% | $18.0M | added +7.6% | 2016 Q3 |
| Millennium Management | 178.9k | 0.33% | $17.7M | added +380.4% | ≤2013 |
| Envestnet Asset Management INC | 171.7k | 0.32% | $17.0M | trimmed -2.9% | 2015 Q4 |
| Goldman Sachs | 155.0k | 0.29% | $15.3M | trimmed -17.3% | ≤2013 |
| Deutsche Bank AG\ | 152.2k | 0.28% | $15.0M | unchanged | 2013 Q3 |
| Hancock Whitney CORP | 149.4k | 0.28% | $14.8M | added +59.5% | 2025 Q1 |
Largest 50 of 410 shown; the full ranked, searchable register is at boothcheck.com/holders/POST. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.