Summit Therapeutics Ownership | Who Owns Summit Therapeutics?
Summit Therapeutics Ownership Summary
Summit Therapeutics is owned by 2.73% institutional investors, 86.05% insiders, and 11.22% retail investors. Baker bros. advisors lp is the largest institutional shareholder, holding 4.54% of SMMT shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 0.46% of its assets in Summit Therapeutics shares.
SMMT Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Summit Therapeutics | 2.73% | 86.05% | 11.22% |
| Sector | Healthcare Stocks | 42.54% | 10.83% | 46.63% |
| Industry | Biotech Stocks | 45.22% | 10.75% | 44.04% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Baker bros. advisors lp | 33.72M | 4.54% | $696.72M |
| Vanguard group | 11.38M | 1.53% | $235.11M |
| Fmr | 8.92M | 1.20% | $184.24M |
| Blackrock | 7.90M | 1.13% | $61.61M |
| Blackrock funding, inc. /de | 7.36M | 0.99% | $152.14M |
| State street | 6.36M | 0.86% | $131.44M |
| Price t rowe associates inc /md/ | 4.54M | 0.61% | $93.77M |
| Geode capital management | 3.13M | 0.42% | $64.74M |
| Pictet asset management sa | 2.16M | 0.29% | $45.55M |
| Morgan stanley | 1.93M | 0.26% | $39.81M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Apeiron capital | 1.31M | 12.87% | $27.08M |
| Baker bros. advisors lp | 33.72M | 5.03% | $696.72M |
| Superstring capital management lp | 197.25K | 4.01% | $4.08M |
| Capricorn fund managers | 496.27K | 3.44% | $10.25M |
| Cutter capital management, lp | 400.00K | 3.36% | $7.72M |
| Polymer capital management (hk) | 817.28K | 2.33% | $16.88M |
| Sectoral asset management | 74.07K | 0.94% | $1.53M |
| Rock springs capital management lp | 710.00K | 0.86% | $14.67M |
| Healthinvest partners ab | 92.74K | 0.75% | $203.40K |
| Polianta | 74.70K | 0.64% | $1.54M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Vanguard group | 11.38M | 0.00% | 2.71M |
| State street | 6.36M | 0.00% | 2.34M |
| Morgan stanley | 1.93M | 0.00% | 1.28M |
| Price t rowe associates inc /md/ | 4.54M | 0.01% | 633.67K |
| Blackrock funding, inc. /de | 7.36M | 0.00% | 517.13K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 7.90M | 0.00% | -1.92M |
| Balyasny asset management | - | - | -1.70M |
| Millennium management | 887.01K | 0.01% | -1.16M |
| Darwin global management | - | - | -1.08M |
| Anson funds management lp | - | - | -941.91K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Capricorn fund managers | 496.27K | 3.44% | 496.27K | $10.25M |
| Cutter capital management, lp | 400.00K | 3.36% | 400.00K | $7.72M |
| Tudor investment corp et al | 347.24K | 0.01% | 347.24K | $7.17M |
| First trust advisors lp | 171.52K | 0.00% | 171.52K | $3.54M |
| Simplex trading | 114.65K | 0.00% | 114.65K | $894.00K |
Sold Out
| Holder | Change |
|---|---|
| Citadel advisors | -5.00 |
| Geowealth management | -14.00 |
| Stephens consulting | -20.00 |
| Rialto wealth management | -20.00 |
| Capital performance advisors llp | -36.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| 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% |
| Dec 31, 2024 | 208 | 9.47% | 86,084,916 | 1.94% | 11 | 8.77% | 131 | 12.93% | 39 | 11.43% |
| Sep 30, 2024 | 189 | 43.18% | 84,448,625 | 17.02% | 11 | 11.18% | 115 | 79.69% | 35 | -23.91% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 3.43M | 0.46% | -167.64K |
| T. Rowe Price Health Sciences | 3.11M | 0.42% | 365.22K |
| Fidelity Growth Compy Commingled Pl S | 2.72M | 0.37% | 26.86K |
| SPDR® S&P Biotech ETF | 2.43M | 0.33% | 5.41K |
| Vanguard Total Stock Mkt Idx Inv | 2.37M | 0.32% | -50.74K |
| iShares Russell 2000 ETF | 2.31M | 0.31% | - |
| Fidelity Growth Company Fund | 2.09M | 0.28% | 6.27K |
| Vanguard Small Cap Index | 1.80M | 0.24% | -12.15K |
| Fidelity Select Biotechnology | 1.63M | 0.22% | -55.10K |
| Vanguard Institutional Extnd Mkt Idx Tr | 1.52M | 0.20% | -660.32K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Oct 21, 2025 | Xia Yu | - | Buy | $10.00M |
| Oct 21, 2025 | DUGGAN ROBERT W | Co-Chief Executive Officer | Buy | $499.98K |
| Oct 21, 2025 | Zanganeh Mahkam | Co-Chief Executive Officer | Buy | $499.98K |
| Sep 11, 2025 | Zanganeh Mahkam | Co-Chief Executive Officer | Buy | $90.35K |
| Sep 10, 2025 | Zanganeh Mahkam | Co-Chief Executive Officer | Buy | $5.89M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q4 | 3 | - |
| 2025 Q3 | 4 | - |
| 2025 Q2 | - | - |
| 2025 Q1 | - | - |
| 2024 Q4 | - | - |
SMMT Ownership FAQ
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