Summit Therapeutics Inc. (SMMT) ownership: Top institutional holder: BAKER BROS. ADVISORS LP ($689.97M). Insider activity: Net Seller (7 buys, 13 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BAKER BROS. ADVISORS LP | 36391063.00 | $689.97M | 2026-03-31 |
| FMR LLC | 10853199.00 | $205.78M | 2026-03-31 |
| VANGUARD GROUP INC | 11177220.00 | $195.49M | 2025-12-31 |
| BlackRock, Inc. | 9653758.00 | $183.04M | 2026-03-31 |
| STATE STREET CORP | 7028160.00 | $133.25M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 5711802.00 | $108.30M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5233252.00 | $99.22M | 2026-03-31 |
| UBS Group AG | 3680315.00 | $69.78M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Buy | null | 2026-06-12 | |
| Buy | null | 2026-06-12 | |
| Buy | null | 2026-06-04 | |
| Buy | null | 2026-06-04 | |
| Buy | null | 2026-06-04 | |
| Buy | null | 2026-06-04 | |
| Sell | null | 2026-01-08 | |
| Sell | null | 2026-01-02 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.