Who owns OS Therapies Inc?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of OSTX from SEC Form 13F filings across 30 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 30 institutions disclosed 2.9M shares of OS Therapies Inc worth $5.4M — about 6.6% of shares outstanding; the largest disclosed holder is VANGUARD CAPITAL MANAGEMENT LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
30
13F holders
$5.4M
value, 2026 filers
6.6%
of shares outstanding (2.9M sh)
6
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of OSTX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT LLC | 777,651 | $1.5M | 0.0% | 1.8% | +65.6% |
| 2 | CM Management, LLC | 400,000 | $760,000 | 0.5% | 0.9% | 0.0% |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | 301,794 | $573,408 | 0.0% | 0.7% | +7.8% |
| 4 | HOWARD FINANCIAL SERVICES, LTD. | 248,001 | $471,202 | 0.0% | 0.6% | +1.0% |
| 5 | BlackRock, Inc. | 242,479 | $460,710 | 0.0% | 0.6% | +274.4% |
| 6 | VANGUARD FIDUCIARY TRUST CO | 174,132 | $330,851 | 0.0% | 0.4% | +49.3% |
| 7 | STATE STREET CORP | 120,100 | $228,190 | 0.0% | 0.3% | +31.7% |
| 8 | MARSHALL WACE, LLPNEW | 100,640 | $191,216 | 0.0% | 0.2% | new |
| 9 | HighTower Advisors, LLC | 85,550 | $162,545 | 0.0% | 0.2% | +462.8% |
| 10 | NORTHERN TRUST CORP | 70,817 | $134,552 | 0.0% | 0.2% | +7.2% |
| 11 | Beacon Pointe Advisors, LLC | 62,507 | $118,764 | 0.0% | 0.1% | 0.0% |
| 12 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 45,000 | $85,500 | 0.0% | 0.1% | +80.0% |
| 13 | INGALLS & SNYDER LLC | 36,676 | $70 | 0.0% | 0.1% | 0.0% |
| 14 | TWO SIGMA INVESTMENTS, LP | 30,414 | $57,787 | 0.0% | 0.1% | +15.3% |
| 15 | STIFEL FINANCIAL CORP | 27,900 | $53,010 | 0.0% | 0.1% | +86.0% |
| 16 | JANE STREET GROUP, LLC | 26,999 | $51,298 | 0.0% | 0.1% | -33.0% |
| 17 | AXQ CAPITAL, LPNEW | 24,623 | $46,784 | 0.0% | 0.1% | new |
| 18 | Vanguard Global Advisers, LLC | 20,958 | $39,820 | 0.0% | 0% | 0.0% |
| 19 | Stratos Wealth Advisors, LLC | 19,314 | $36,698 | 0.0% | 0% | +39.8% |
| 20 | Quadrature Capital LtdNEW | 15,662 | $29,758 | 0.0% | 0% | new |
| 21 | JONES FINANCIAL COMPANIES LLLP | 14,501 | $27,262 | 0.0% | 0% | +12.2% |
| 22 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 13,532 | $25,711 | 0.0% | 0% | -97.0% |
| 23 | MORGAN STANLEY | 13,000 | $24,700 | 0.0% | 0% | +37.0% |
| 24 | UBS Group AG | 8,813 | $16,745 | 0.0% | 0% | -97.5% |
| 25 | Rockefeller Capital Management L.P.NEW | 7,500 | $14,250 | 0.0% | 0% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.