Os TherapiesOSTX
13F holders, Q1 2026 (March 31)29holders +4
8new positions
6sold out
$1.41avg. 13F price*
At the end of Q1 2026, 29 institutions reported holding Os Therapies Inc. (OSTX) in their 13F filings, up 4 from Q4 2025. 8 opened new positions and 6 sold out. The largest holders were Vanguard Capital Management LLC ($662K), Susquehanna International Group, LLP ($633K) and CM Management, LLC ($564K).
- Company
- Os Therapies Inc.
- CUSIP
- 68764Y207
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 8 | $1.2M |
| Exits | 6 | $198K |
All 13F filers, Q4 2025 → Q1 2026: 1,263,308 shares bought and 207,774 shares sold, net +1,055,534 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 29 holders
| Vanguard Capital Management LLC | 0.00% | — | 469,467 | $662K |
| Susquehanna International Group, LLP | 0.00% | New | 448,737 | $633K |
| CM Management, LLC | 0.47% | No change | 400,000 | $564K |
| UBS Group AG | 0.00% | Add +1820.5% | 348,678 | $492K |
| Geode Capital Management, LLC | 0.00% | Add +13.8% | 280,045 | $395K |
| Howard Financial Services, LTD. | 0.04% | New | 245,436 | $346K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 116,663 | $164K |
| State Street Corp. | 0.00% | Add +55.9% | 91,200 | $129K |
| Northern Trust Corp. | 0.00% | Reduce -7.4% | 66,054 | $93K |
| BlackRock, Inc. | 0.00% | Add +5.5% | 64,772 | $91K |
| Beacon Pointe Advisors, LLC | 0.00% | New | 62,507 | $88K |
| Jane Street Group, LLC | 0.00% | Add +45.3% | 40,316 | $57K |
| Ingalls & Snyder LLC | 0.00% | No change | 36,676 | $52K |
| Sanders Morris Harris LLC | 0.01% | New | 32,000 | $45K |
| XTX Topco Ltd | 0.00% | New | 31,622 | $45K |
| Two Sigma Investments, LP | 0.00% | Reduce -69.9% | 26,380 | $37K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 25,000 | $35K |
| Vanguard Global Advisers, LLC | 0.00% | — | 20,958 | $30K |
| HighTower Advisors, LLC | 0.00% | New | 15,200 | $21K |
| Stifel Financial Corp. | 0.00% | No change | 15,000 | $21K |
| Stratos Wealth Advisors, LLC | 0.00% | No change | 13,817 | $19K |
| Jones Financial Companies LLLP | 0.00% | Add +18.9% | 12,921 | $18K |
| Mercer Global Advisors Inc. | 0.00% | No change | 10,220 | $14K |
| LPL Financial LLC | 0.00% | No change | 10,113 | $14K |
| Morgan Stanley | 0.00% | Add +849.0% | 9,490 | $13K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +4648.9% | 4,179 | $6K |
| Armstrong Advisory Group, Inc. | 0.00% | No change | 100 | $141 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 17 | $24 |
| FMR LLC | 0.00% | New | 2 | $2 |
"% of holder's portfolio" is OSTX's weight in each manager's 13F, not the share of Os Therapies Inc. the manager owns.