OS Therapies Inc: which funds bought and sold
Institutions that bought and sold OS Therapies shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 21 institutions that filed 13F reports for both quarters added to or opened positions in OS Therapies, and 9 cut or closed them. Together they sold a net 1,629 shares, −0.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 140K shares (+273.1%); index fund managers were net buyers of 599K shares (+55.0%). 6 opened a new position and 6 sold out entirely.
Bought, Q2 2026 21 institutions, 6 of them new holders Sold, Q2 2026 9 institutions, 6 of them sold out
Net change, all compared −1,629 shares (−0.1%)
Net change, active managers +140K shares (+273.1%), 4 bought, 1 sold
Buyers versus sellers
21 bought 5 9 sold
Active managers and hedge funds 4 bought · 1 sold · +140K
Index fund managers 6 bought · 0 sold · +599K
Other institutions 11 bought · 8 sold · −741K
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Vanguard Capital Management LLC Index funds | +308K +65.6% | 778K | $1.5M |
| Blackrock, Inc. Index funds | +178K +274.4% | 242K | $460,710 |
| Marshall Wace, LLP Hedge fund | +101K New position | 101K | $191,216 |
| Hightower Advisors, LLC | +70K +462.8% | 86K | $162,545 |
| Vanguard Fiduciary Trust Co Index funds | +57K +49.3% | 174K | $330,851 |
| State Street Corp Index funds | +29K +31.7% | 120K | $228,190 |
| Axq Capital, LP | +25K New position | 25K | $46,784 |
| Geode Capital Management, LLC Index funds | +22K +7.8% | 302K | $573,408 |
| Bridgeway Capital Management, LLC Active manager | +20K +80.0% | 45K | $85,500 |
| Quadrature Capital Ltd Hedge fund | +16K New position | 16K | $29,758 |
| Stifel Financial Corp | +13K +86.0% | 28K | $53,010 |
| Rockefeller Capital Management L.P. | +7,500 New position | 7,500 | $14,250 |
| Steward Partners Investment Advisory, LLC | +5,681 New position | 5,681 | $10,794 |
| Stratos Wealth Advisors, LLC | +5,497 +39.8% | 19K | $36,698 |
| Northern Trust Corp Index funds | +4,763 +7.2% | 71K | $134,552 |
| Two Sigma Investments, LP Hedge fund | +4,034 +15.3% | 30K | $57,787 |
| Morgan Stanley | +3,510 +37.0% | 13K | $24,700 |
| Howard Financial Services, Ltd. | +2,565 +1.0% | 248K | $471,202 |
| Jones Financial Companies LLLP | +1,580 +12.2% | 15K | $27,262 |
| Barclays PLC | +1,534 New position | 1,534 | $2,915 |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Marshall Wace, LLP Hedge fund | +101K New position | 101K | $191,216 |
| Bridgeway Capital Management, LLC Active manager | +20K +80.0% | 45K | $85,500 |
| Quadrature Capital Ltd Hedge fund | +16K New position | 16K | $29,758 |
| Two Sigma Investments, LP Hedge fund | +4,034 +15.3% | 30K | $57,787 |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Susquehanna International Group, LLP | −435K −97.0% | 14K | $25,711 |
| UBS Group AG | −340K −97.5% | 8,813 | $16,745 |
| Sanders Morris Harris LLC | −32K Sold out | 0 | — |
| Xtx Topco Ltd | −32K Sold out | 0 | — |
| Jane Street Group, LLC | −13K −33.0% | 27K | $51,298 |
| Mercer Global Advisors Inc | −10K Sold out | 0 | — |
| LPL Financial LLC | −10K Sold out | 0 | — |
| Tower Research Capital LLC (TRC) | −4,179 Sold out | 0 | — |
| FMR LLC Active manager | −2 Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | −2 Sold out | 0 | — |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Marshall Wace, LLPHedge fund | 101K | $191,216 |
| Axq Capital, LP | 25K | $46,784 |
| Quadrature Capital LtdHedge fund | 16K | $29,758 |
| Rockefeller Capital Management L.P. | 7,500 | $14,250 |
| Steward Partners Investment Advisory, LLC | 5,681 | $10,794 |
| Barclays PLC | 1,534 | $2,915 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Sanders Morris Harris LLC | 32K | $45,120 |
| Xtx Topco Ltd | 32K | $44,587 |
| Mercer Global Advisors Inc | 10K | $14,410 |
| LPL Financial LLC | 10K | $14,259 |
| Tower Research Capital LLC (TRC) | 4,179 | $5,892 |
| FMR LLCActive manager | 2 | $2 |
Who holds the shares
- Institutions reporting
- 29
- Ten largest holders
- 87.1% of 13F-reported shares
- Index fund managers
- 58.3% of 13F-reported shares
- Active managers and hedge funds
- 6.6% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 4 | 1 | 2 | 1 | +140K | +273.1% |
| Index fund managers | 6 | 0 | 0 | 0 | +599K | +55.0% |
| Other institutions | 11 | 8 | 4 | 5 | −741K | −42.1% |