OSTX — OS THERAPIES INCORPORATED
As of Q2 2026, 7 SEC-registered investment managers reported holding OSTX (OS THERAPIES INCORPORATED) in their latest 13F filings, with a combined reported value of $1.46M across 767.96K shares. That is -3.5% by share count (-27.46K shares) versus the previous quarter, while reported value moved +30.1%. Ownership is concentrated: the five largest holders account for 97.2% of reported value and the top ten for 100.0%.
Compared with the prior quarter, 1 opened new positions, 5 added to existing stakes, 1 trimmed, 1 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
OSTX is classified in the Health Care sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
Q2 2026 — 7 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Geode Capital Management history | 301.79K | $573.41K | 0.00% | Add |
| BlackRock Inc history | 242.48K | $460.71K | 0.00% | Add |
| Marshall Wace history | 100.64K | $191.22K | 0.00% | New |
| Northern Trust Corp history | 70.82K | $134.55K | 0.00% | Add |
| Two Sigma Investments history | 30.41K | $57.79K | 0.00% | Add |
| Morgan Stanley history | 13.00K | $24.70K | 0.00% | Add |
| UBS Group AG history | 8.81K | $16.75K | 0.00% | Reduce |
Q1 2026 — 7 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| UBS Group AG history | 348.68K | $491.64K | 0.00% | Add |
| Geode Capital Management history | 280.05K | $394.86K | 0.00% | Add |
| Northern Trust Corp history | 66.05K | $93.14K | 0.00% | Reduce |
| BlackRock Inc history | 64.77K | $91.33K | 0.00% | Add |
| Two Sigma Investments history | 26.38K | $37.20K | 0.00% | Reduce |
| Morgan Stanley history | 9.49K | $13.38K | 0.00% | Add |
| Fidelity Management & Research (FMR) history | 2 | $2 | 0.00% | New |
Q4 2025 — 10 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 540.42K | $756.59K | 0.00% | Add |
| Geode Capital Management history | 246.04K | $344.45K | 0.00% | Add |
| Marshall Wace history | 109.95K | $153.93K | 0.00% | Reduce |
| Two Sigma Investments history | 87.54K | $122.55K | 0.00% | Add |
| Northern Trust Corp history | 71.31K | $99.83K | 0.00% | Add |
| BlackRock Inc history | 61.42K | $86.00K | 0.00% | Add |
| Millennium Management history | 30.79K | $43.10K | 0.00% | Reduce |
| UBS Group AG history | 18.16K | $25.42K | 0.00% | Add |
| Morgan Stanley history | 1.00K | $1.40K | 0.00% | Hold |
| Bank of America Corp history | 23 | $32 | 0.00% | New |
Q3 2025 — 10 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Marshall Wace history | 198.55K | $389.16K | 0.00% | New |
| Vanguard Group history | 188.26K | $369.00K | 0.00% | New |
| Geode Capital Management history | 187.69K | $367.87K | 0.00% | New |
| Millennium Management history | 93.57K | $183.41K | 0.00% | New |
| Two Sigma Investments history | 86.25K | $169.04K | 0.00% | New |
| Northern Trust Corp history | 56.26K | $110.28K | 0.00% | New |
| BlackRock Inc history | 48.16K | $94.40K | 0.00% | Add |
| Morgan Stanley history | 1.00K | $1.96K | 0.00% | Add |
| UBS Group AG history | 227 | $445 | 0.00% | Reduce |
| JPMorgan Chase & Co history | 13 | $25 | 0.00% | Reduce |
Q2 2025 — 7 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| UBS Group AG history | 52.82K | $99.30K | 0.00% | New |
| BlackRock Inc history | 30.28K | $56.93K | 0.00% | Reduce |
| BlackRock Inc history | 30.28K | $56.93K | 0.00% | Reduce |
| Morgan Stanley history | 740 | $1.39K | 0.00% | Add |
| Morgan Stanley history | 740 | $1.39K | 0.00% | Add |
| JPMorgan Chase & Co history | 322 | $605 | 0.00% | New |
| JPMorgan Chase & Co history | 322 | $605 | 0.00% | New |
Q1 2025 — 4 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| BlackRock Inc history | 37.51K | $57.76K | 0.00% | Add |
| BlackRock Inc history | 37.51K | $57.76K | 0.00% | Add |
| Morgan Stanley history | 3 | $5 | 0.00% | Reduce |
| Morgan Stanley history | 3 | $5 | 0.00% | Reduce |
New Positions (Q2 2026)
- Marshall Wace 100.64K sh · $191.22K
Fully Exited (vs previous quarter)
- Fidelity Management & Research (FMR) sold 2 sh · $2
Fund Position History — shares by quarter (top 12 funds)
| Fund | Q2 2026 | Q1 2026 | Q4 2025 | Q3 2025 | Q2 2025 | Q1 2025 | Q4 2024 | Q3 2024 |
|---|---|---|---|---|---|---|---|---|
| Geode Capital Management | 301.79K | 280.05K | 246.04K | 187.69K | — | — | — | — |
| BlackRock Inc | 242.48K | 64.77K | 61.42K | 48.16K | 30.28K | 37.51K | 3.14K | — |
| Marshall Wace | 100.64K | — | 109.95K | 198.55K | — | — | — | — |
| Northern Trust Corp | 70.82K | 66.05K | 71.31K | 56.26K | — | — | — | — |
| Two Sigma Investments | 30.41K | 26.38K | 87.54K | 86.25K | — | — | — | — |
| Morgan Stanley | 13.00K | 9.49K | 1.00K | 1.00K | 740 | 3 | 1.88K | — |
| UBS Group AG | 8.81K | 348.68K | 18.16K | 227 | 52.82K | — | — | 3.81K |
| Fidelity Management & Research (FMR) | — | 2 | — | — | — | — | — | — |
| JPMorgan Chase & Co | — | — | — | 13 | 322 | — | — | — |
| Bank of America Corp | — | — | 23 | — | — | — | — | — |
| Millennium Management | — | — | 30.79K | 93.57K | — | — | 29.84K | 60.44K |
| Vanguard Group | — | — | 540.42K | 188.26K | — | — | — | — |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details