Summit Therapeutics Ownership | Who Owns Summit Therapeutics?
Summit Therapeutics Ownership Summary
Summit Therapeutics is owned by 3.19% institutional investors, 82.64% insiders, and 14.17% retail investors. Baker bros. advisors lp is the largest institutional shareholder, holding 4.87% of SMMT shares. State Street® SPDR® S&P® Biotech ETF is the top mutual fund, with 0.96% of its assets in Summit Therapeutics shares.
SMMT Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Summit Therapeutics | 3.19% | 82.64% | 14.17% |
| Sector | Healthcare Stocks | 35.64% | 12.08% | 52.28% |
| Industry | Biotech Stocks | 35.26% | 12.00% | 52.74% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Baker bros. advisors lp | 36.39M | 4.87% | $689.97M |
| Vanguard group | 11.18M | 1.50% | $195.49M |
| Fmr | 10.85M | 1.45% | $205.78M |
| Blackrock funding, inc. /de | 9.65M | 1.29% | $183.04M |
| Blackrock | 7.90M | 1.13% | $61.61M |
| Price t rowe associates inc /md/ | 8.28M | 1.11% | $156.95M |
| State street | 7.03M | 0.94% | $133.25M |
| Ubs group | 3.68M | 0.49% | $69.78M |
| Geode capital management | 3.32M | 0.44% | $62.89M |
| D. e. shaw | 2.24M | 0.30% | $42.51M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Apeiron capital | 1.31M | 23.21% | $24.82B |
| Superstring capital management lp | 892.87K | 12.09% | $16.93M |
| Baker bros. advisors lp | 36.39M | 3.96% | $689.97M |
| Cutter capital management, lp | 400.00K | 3.36% | $7.72M |
| Sectoral asset management | 69.61K | 1.16% | $1.40M |
| Rock springs capital management lp | 710.00K | 0.79% | $13.46M |
| Qvt financial lp | 360.52K | 0.50% | $6.84M |
| Tang capital management | 550.00K | 0.44% | $11.36M |
| Wealth management partners | 89.27K | 0.31% | $1.30M |
| Griffin asset management | 193.58K | 0.30% | $2.82M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Ubs group | 3.68M | 0.01% | 2.81M |
| D. e. shaw | 2.24M | 0.03% | 1.83M |
| Norges bank | 1.37M | 0.00% | 1.37M |
| Vanguard fiduciary trust | 934.39K | 0.00% | 934.39K |
| Superstring capital management lp | 892.87K | 12.09% | 892.87K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Fmr | 10.85M | 0.01% | -2.51M |
| Citadel advisors | 441.74K | 0.00% | -2.03M |
| Blackrock | 7.90M | 0.00% | -1.92M |
| Polymer capital management (hk) | 133.03K | 0.22% | -1.29M |
| Price t rowe associates inc /md/ | 8.28M | 0.02% | -1.09M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 1.37M | 0.00% | 1.37M | $24.03M |
| Vanguard fiduciary trust | 934.39K | 0.00% | 934.39K | $17.72M |
| Point72 asset management | 784.19K | 0.02% | 784.19K | $14.87M |
| Marshall wace, llp | 475.24K | 0.01% | 475.24K | $9.01M |
| Cutter capital management, lp | 400.00K | 3.36% | 400.00K | $7.72M |
Sold Out
| Holder | Change |
|---|---|
| Bay harbor wealth management | -2.00 |
| Clearstead advisors | -2.00 |
| Hfm investment advisors | -2.00 |
| Activest wealth management | -3.00 |
| Massmutual trust co fsb/adv | -5.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 104 | -53.15% | 23,850,252 | -79.75% | 3 | 1.27% | 60 | -46.43% | 21 | -69.12% |
| Dec 31, 2025 | 64 | -75.00% | 16,745,961 | -83.72% | 2 | 1.17% | 29 | -78.52% | 20 | -70.59% |
| Sep 30, 2025 | 101 | -58.09% | 20,268,240 | -79.02% | 2 | 1.61% | 47 | -63.85% | 28 | -59.42% |
| Jun 30, 2025 | 248 | 8.30% | 97,673,633 | -0.07% | 13 | 7.50% | 133 | 17.70% | 70 | -4.11% |
| Mar 31, 2025 | 14 | -93.83% | 26,286,219 | -71.60% | 3 | 2.20% | 7 | -95.17% | 2 | -94.74% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| State Street® SPDR® S&P® Biotech ETF | 7.43M | 0.96% | -164.94K |
| Vanguard Total Stock Mkt Idx Inv | 3.71M | 0.48% | -23.84K |
| Vanguard US Total Market Shares ETF | 3.43M | 0.46% | -167.64K |
| Fidelity Growth Compy Commingled Pl S | 3.53M | 0.45% | 2.55K |
| Vanguard Small Cap Index | 2.67M | 0.34% | -4.79K |
| Fidelity Growth Company Fund | 2.65M | 0.34% | 1.70K |
| SPDR® S&P Biotech ETF | 2.43M | 0.33% | 5.41K |
| T. Rowe Price Health Sciences | 2.53M | 0.33% | -979.27K |
| iShares Russell 2000 ETF | 2.31M | 0.31% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 1.78M | 0.23% | 31.48K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Jun 12, 2026 | Zanganeh Mahkam | Co-Chief Executive Officer | Buy | $49.99M |
| Jun 12, 2026 | DUGGAN ROBERT W | Co-Chief Executive Officer | Buy | $49.99M |
| Jun 04, 2026 | DUGGAN ROBERT W | Co-Chief Executive Officer | Buy | $1.46M |
| Jun 04, 2026 | Zanganeh Mahkam | Co-Chief Executive Officer | Buy | $1.46M |
| Jun 04, 2026 | Soni Manmeet Singh | COO and CFO | Buy | $360.75K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | 6 | - |
| 2026 Q1 | - | - |
| 2025 Q4 | 3 | - |
| 2025 Q3 | 4 | - |
| 2025 Q2 | - | - |
SMMT Ownership FAQ
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