OSTX OS Therapies Incorporated
OS Therapies Incorporated (OSTX) Institutional Ownership
What the institutions did with OSTX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | 777.7K | 26.9% |
| CM Management, LLC | 400.0K | 13.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 301.8K | 10.4% |
| HOWARD FINANCIAL SERVICES, LTD. | 248.0K | 8.6% |
| BlackRock, Inc. | 242.5K | 8.4% |
| VANGUARD FIDUCIARY TRUST CO | 174.1K | 6.0% |
| STATE STREET CORP | 120.1K | 4.1% |
| MARSHALL WACE, LLP | 100.6K | 3.5% |
| HighTower Advisors, LLC | 85.6K | 3.0% |
| NORTHERN TRUST CORP | 70.8K | 2.4% |
| Beacon Pointe Advisors, LLC | 62.5K | 2.2% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 45.0K | 1.6% |
| INGALLS & SNYDER LLC | 36.7K | 1.3% |
| TWO SIGMA INVESTMENTS, LP | 30.4K | 1.1% |
| STIFEL FINANCIAL CORP | 27.9K | 1.0% |
| JANE STREET GROUP, LLC | 27.0K | 0.9% |
| AXQ CAPITAL, LP | 24.6K | 0.9% |
| Vanguard Global Advisers, LLC | 21.0K | 0.7% |
| Stratos Wealth Advisors, LLC | 19.3K | 0.7% |
| Quadrature Capital Ltd | 15.7K | 0.5% |
| JONES FINANCIAL COMPANIES LLLP | 14.5K | 0.5% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 13.5K | 0.5% |
| MORGAN STANLEY | 13.0K | 0.4% |
| UBS Group AG | 8.8K | 0.3% |
| Rockefeller Capital Management L.P. | 7.5K | 0.3% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 448.7K | 13.5K | -435.2K |
| UBS Group AG | Reduced | 348.7K | 8.8K | -339.9K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 469.5K | 777.7K | +308.2K |
| BlackRock, Inc. | Increased | 64.8K | 242.5K | +177.7K |
| MARSHALL WACE, LLP | New | 0 | 100.6K | +100.6K |
| HighTower Advisors, LLC | Increased | 15.2K | 85.6K | +70.4K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 116.7K | 174.1K | +57.5K |
| SANDERS MORRIS HARRIS LLC | Sold Out | 32.0K | 0 | -32.0K |
| XTX Topco Ltd | Sold Out | 31.6K | 0 | -31.6K |
| STATE STREET CORP | Increased | 91.2K | 120.1K | +28.9K |
| AXQ CAPITAL, LP | New | 0 | 24.6K | +24.6K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 280.0K | 301.8K | +21.7K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Increased | 25.0K | 45.0K | +20.0K |
| Quadrature Capital Ltd | New | 0 | 15.7K | +15.7K |
| JANE STREET GROUP, LLC | Reduced | 40.3K | 27.0K | -13.3K |
| STIFEL FINANCIAL CORP | Increased | 15.0K | 27.9K | +12.9K |
| MERCER GLOBAL ADVISORS INC /ADV | Sold Out | 10.2K | 0 | -10.2K |
| LPL Financial LLC | Sold Out | 10.1K | 0 | -10.1K |
| Rockefeller Capital Management L.P. | New | 0 | 7.5K | +7.5K |
| Steward Partners Investment Advisory, LLC | New | 0 | 5.7K | +5.7K |
| Stratos Wealth Advisors, LLC | Increased | 13.8K | 19.3K | +5.5K |
| NORTHERN TRUST CORP | Increased | 66.1K | 70.8K | +4.8K |
| Tower Research Capital LLC (TRC) | Sold Out | 4.2K | 0 | -4.2K |
| TWO SIGMA INVESTMENTS, LP | Increased | 26.4K | 30.4K | +4.0K |
| MORGAN STANLEY | Increased | 9.5K | 13.0K | +3.5K |
| HOWARD FINANCIAL SERVICES, LTD. | Increased | 245.4K | 248.0K | +2.6K |
| JONES FINANCIAL COMPANIES LLLP | Increased | 12.9K | 14.5K | +1.6K |
| BARCLAYS PLC | New | 0 | 1.5K | +1.5K |
| Caitong International Asset Management Co., Ltd | Increased | 17 | 63 | +46 |
| FMR LLC | Sold Out | 2 | 0 | -2 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.