Os TherapiesOSTX
13F holders, Q3 2025 (September 30)25holders +12
13new positions
1sold out
1famous investor
$1.96avg. 13F price*
At the end of Q3 2025, 25 institutions reported holding Os Therapies Inc. (OSTX) in their 13F filings, up 12 from Q2 2025. 13 opened new positions and 1 sold out. The largest holders were CM Management, LLC ($784K), Marshall Wace, LLP ($389K) and Vanguard Group Inc. ($369K). One famous investor held it Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Os Therapies Inc.
- CUSIP
- 68764Y207
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 13 | $1.9M |
| Exits | 1 | $63K |
All 13F filers, Q2 2025 → Q3 2025: 1,045,882 shares bought and 86,388 shares sold, net +959,494 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 25 holders
| CM Management, LLC | 0.65% | Add +6.7% | 400,000 | $784K |
| Marshall Wace, LLP | 0.00% | New | 198,552 | $389K |
| Vanguard Group Inc. | 0.00% | New | 188,263 | $369K |
| Geode Capital Management, LLC | 0.00% | New | 187,688 | $368K |
| Millennium Management | 0.00% | New | 93,574 | $183K |
| Two Sigma Investments, LP | 0.00% | New | 86,247 | $169K |
| Virtu Financial LLC | 0.01% | Add +252.0% | 75,801 | $149K |
| Northern Trust Corp. | 0.00% | New | 56,263 | $110K |
| State Street Corp. | 0.00% | New | 50,300 | $99K |
| BlackRock, Inc. | 0.00% | Add +59.0% | 48,163 | $94K |
| Ingalls & Snyder LLC | 0.00% | No change | 36,676 | $72K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 25,000 | $49K |
| Ground Swell Capital, LLC | 0.09% | New | 20,462 | $40K |
| Mercer Global Advisors Inc. | 0.00% | New | 20,440 | $40K |
| Stifel Financial Corp. | 0.00% | No change | 15,000 | $29K |
| Susquehanna International Group, LLP | 0.00% | New | 14,961 | $29K |
| Sanders Morris Harris LLC | 0.00% | New | 12,000 | $24K |
| Two Sigma Securities, LLC | 0.00% | New | 10,237 | $20K |
| Full Sail Capital, LLC | 0.00% | No change | 10,220 | $20K |
| Jones Financial Companies LLLP | 0.00% | New | 7,867 | $16K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +63.4% | 4,167 | $8K |
| Morgan Stanley | 0.00% | Add +35.1% | 1,000 | $2K |
| UBS Group AG | 0.00% | Reduce -99.6% | 227 | $445 |
| Armstrong Advisory Group, Inc. | 0.00% | No change | 100 | $196 |
| JPMorgan Chase & Co. | 0.00% | Reduce -96.0% | 13 | $25 |
"% of holder's portfolio" is OSTX's weight in each manager's 13F, not the share of Os Therapies Inc. the manager owns.