Summit Therapeutics PLC
Ownership
Ownership Structure
Who owns Summit Therapeutics PLC (SMMT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 19.1% of the shares are freely tradable; institutional investors hold 15.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Baker Bros Advisors LP | 4.56 | 36,391,063 | +0.0 | 03/31/2026 |
| FMR Inc | 1.36 | 10,853,199 | -18.8 | 03/31/2026 |
| BlackRock Inc | 1.21 | 9,653,758 | +3.1 | 03/31/2026 |
| T. Rowe Price Associates, Inc. | 1.04 | 8,277,859 | -11.7 | 03/31/2026 |
| State Street Corp | 0.88 | 7,028,160 | +5.9 | 03/31/2026 |
| Vanguard Capital Management, LLC | 0.72 | 5,711,802 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 0.66 | 5,233,252 | +0.0 | 03/31/2026 |
| UBS Group AG | 0.46 | 3,680,315 | +322.7 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| State Street® SPDR® S&P® Biotech ETF | 0.98 | 7,851,939 | -1.1 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 0.47 | 3,726,667 | +0.5 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.