10 institutions reported holding $71.3M of POST HLDGS INC (PSTUB) in SEC 13F filings for 2026-06-30. Largest institutional holders: MACKAY SHIELDS LLC ($41.7M), Calamos Advisors LLC ($15.6M), ABSOLUTE INVESTMENT ADVISERS, LLC ($7.7M), Alken Asset Management Ltd ($2.5M), Walleye Capital LLC ($2.0M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | MACKAY SHIELDS LLC | $41.7M | 0 | Trimmed |
| 2 | Calamos Advisors LLC | $15.6M | 0 | Hold |
| 3 | ABSOLUTE INVESTMENT ADVISERS, LLC | $7.7M | 7.5M | Hold |
| 4 | Alken Asset Management Ltd | $2.5M | 0 | Added |
| 5 | Walleye Capital LLC | $2.0M | 0 | Trimmed |
| 6 | Police & Firemen's Retirement System of New Jersey | $876,949 | 845,000 | Hold |
| 7 | MIZUHO SECURITIES USA LLC | $580,452 | 536,000 | Hold |
| 8 | CITIGROUP INC | $216,315 | 0 | Trimmed |
| 9 | OPPENHEIMER ASSET MANAGEMENT INC. | $158,355 | 153,000 | Trimmed |
| 10 | STEPHENS INC /AR/ | $47,610 | 46,000 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30