Os TherapiesOSTX
13F holders, Q4 2025 (December 31)25holders
7new positions
6sold out
1famous investor
$1.40avg. 13F price*
At the end of Q4 2025, 25 institutions reported holding Os Therapies Inc. (OSTX) in their 13F filings, unchanged from Q3 2025. 7 opened new positions and 6 sold out. The largest holders were Vanguard Group Inc. ($757K), CM Management, LLC ($560K) and Geode Capital Management, LLC ($344K). 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 Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 7 | $73K |
| Exits | 6 | $262K |
All 13F filers, Q3 2025 → Q4 2025: 521,533 shares bought and 299,165 shares sold, net +222,368 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 25 holders
| Vanguard Group Inc. | 0.00% | Add +187.1% | 540,421 | $757K |
| CM Management, LLC | 0.47% | No change | 400,000 | $560K |
| Geode Capital Management, LLC | 0.00% | Add +31.1% | 246,038 | $344K |
| Marshall Wace, LLP | 0.00% | Reduce -44.6% | 109,949 | $154K |
| Two Sigma Investments, LP | 0.00% | Add +1.5% | 87,537 | $123K |
| Northern Trust Corp. | 0.00% | Add +26.7% | 71,309 | $100K |
| BlackRock, Inc. | 0.00% | Add +27.5% | 61,425 | $86K |
| State Street Corp. | 0.00% | Add +16.3% | 58,500 | $82K |
| Ingalls & Snyder LLC | 0.00% | No change | 36,676 | $51K |
| Millennium Management | 0.00% | Reduce -67.1% | 30,785 | $43K |
| Jane Street Group, LLC | 0.00% | New | 27,740 | $39K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 25,000 | $35K |
| UBS Group AG | 0.00% | Add +7898.2% | 18,156 | $25K |
| Stifel Financial Corp. | 0.00% | No change | 15,000 | $21K |
| Stratos Wealth Advisors, LLC | 0.00% | New | 13,817 | $19K |
| Jones Financial Companies LLLP | 0.00% | Add +38.1% | 10,867 | $15K |
| Mercer Global Advisors Inc. | 0.00% | Reduce -50.0% | 10,220 | $14K |
| LPL Financial LLC | 0.00% | New | 10,113 | $14K |
| Morgan Stanley | 0.00% | No change | 1,000 | $1K |
| Royal Bank of Canada | 0.00% | New | 480 | $1K |
| Armstrong Advisory Group, Inc. | 0.00% | No change | 100 | $140 |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -97.9% | 88 | $123 |
| Northwestern Mutual Wealth Management Co. | 0.00% | New | 25 | $35 |
| Bank of America Corp. | 0.00% | New | 23 | $32 |
| FNY Investment Advisers, LLC | 0.00% | New | 100 | $0 |
"% of holder's portfolio" is OSTX's weight in each manager's 13F, not the share of Os Therapies Inc. the manager owns.