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NASDAQ: SMMT
Summit Therapeutics Inc Stock Ownership - Who owns Summit Therapeutics?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Summit Therapeutics Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Mahkam ZanganehCo-Chief Executive Officer2025-10-2113,980,789$18.74
$262.00MBuy
Robert W. DugganCo-Chief Executive Officer2025-10-2113,980,789$18.74
$262.00MBuy
Robert W. DugganCo-Chief Executive Officer2025-10-21266,808$18.74
$5.00MBuy
Robert W. DugganCo-Chief Executive Officer2025-10-2126,680$18.74
$499.98kBuy
Manmeet Singh SoniCOO and CFO2025-10-2153,361$18.74
$999.99kBuy
Yu XiaDirector2025-10-21533,617$18.74
$10.00MBuy
Mahkam ZanganehCo-Chief Executive Officer2025-10-21266,808$18.74
$5.00MBuy
Mahkam ZanganehCo-Chief Executive Officer2025-10-2126,680$18.74
$499.98kBuy
Bhaskar AnandChief Accounting Officer2025-10-2126,680$18.74
$499.98kBuy
Mahkam ZanganehCo-Chief Executive Officer2025-09-115,000$18.07
$90.35kBuy

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Net Insider Buy/Sell (L12M) Ownership

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SMMT Shareholders

What type of owners hold Summit Therapeutics Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Mahkam Zanganeh86.05%640,563,702$12.11BInsider
Robert W. Duggan81.42%606,105,809$11.46BInsider
Baker Bros Advisors LP4.53%33,722,974$637.70MInstitution
Yu Xia4.31%32,057,147$606.20MInsider
Maky Zanganeh2.00%14,915,775$282.06MInsider
Fmr LLC1.24%9,226,376$174.47MInstitution
Vanguard Group Inc1.17%8,673,672$164.02MInstitution
Blackrock Inc0.92%6,846,667$129.47MInstitution
State Street Corp0.54%4,017,697$75.97MInstitution
Price T Rowe Associates Inc0.52%3,905,148$73.85MInstitution

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SMMT vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SMMT7.01%92.99%Net BuyingNet Buying
ROIV42.85%57.15%Net SellingNet Selling
ASND100.00%0.00%
BBIO63.84%36.16%Net SellingNet Selling
IONS96.84%3.16%Net SellingNet Selling
View Top Biotech Stocks

Summit Therapeutics Stock Ownership FAQ

Who owns Summit Therapeutics?

Summit Therapeutics (NASDAQ: SMMT) is owned by 13.14% institutional shareholders, 174.27% Summit Therapeutics insiders, and 0.00% retail investors. Mahkam Zanganeh is the largest individual Summit Therapeutics shareholder, owning 640.56M shares representing 86.05% of the company. Mahkam Zanganeh's Summit Therapeutics shares are currently valued at $12.11B.

If you're new to stock investing, here's how to buy Summit Therapeutics stock.
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