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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 Officer2025-10-2126,680$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
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 Officer2025-09-115,000$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 Zanganeh82.53%640,563,702$11.19BInsider
Robert W. Duggan78.09%606,105,809$10.59BInsider
Baker Bros Advisors LP4.69%36,391,063$635.75MInstitution
Yu Xia4.13%32,057,147$560.04MInsider
Maky Zanganeh1.92%14,915,775$260.58MInsider
Fmr LLC1.40%10,853,199$189.61MInstitution
Blackrock Inc1.24%9,653,758$168.65MInstitution
Price T Rowe Associates Inc1.07%8,277,859$144.61MInstitution
State Street Corp0.91%7,028,160$122.78MInstitution
Vanguard Capital Management LLC0.74%5,711,802$99.79MInstitution

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SMMT vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SMMT8.40%91.60%Net Buying
BBIO64.68%35.32%Net SellingNet Selling
IONS96.89%3.11%Net SellingNet Selling
EXEL94.82%5.18%Net SellingNet Selling
JAZZ29.88%70.12%Net SellingNet Selling
View Top Biotech Stocks

Summit Therapeutics Stock Ownership FAQ

Who owns Summit Therapeutics?

Summit Therapeutics (NASDAQ: SMMT) is owned by 15.32% institutional shareholders, 167.15% Summit Therapeutics insiders, and 0.00% retail investors. Mahkam Zanganeh is the largest individual Summit Therapeutics shareholder, owning 640.56M shares representing 82.53% of the company. Mahkam Zanganeh's Summit Therapeutics shares are currently valued at $11.19B.

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