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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
Robert W. DugganCo-Chief Executive Officer2026-06-123,810,000$13.12
$49.99MBuy
Mahkam ZanganehCo-Chief Executive Officer2026-06-123,810,000$13.12
$49.99MBuy
Manmeet Singh SoniCOO and CFO2026-06-0425,000$14.46
$361.50kBuy
Robert W. DugganCo-Chief Executive Officer2026-06-04100,000$14.60
$1.46MBuy
Manmeet Singh SoniCOO and CFO2026-06-0425,000$14.43
$360.75kBuy
Mahkam ZanganehCo-Chief Executive Officer2026-06-04100,000$14.60
$1.46MBuy
Mahkam ZanganehCo-Chief Executive Officer2025-10-2113,980,789$18.74
$262.00MBuy
Mahkam ZanganehCo-Chief Executive 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

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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 Zanganeh83.03%644,473,702$9.94BInsider
Robert W. Duggan78.59%610,015,809$9.41BInsider
Baker Bros Advisors LP4.69%36,391,063$561.15MInstitution
Yu Xia4.13%32,057,147$494.32MInsider
Maky Zanganeh1.92%14,915,775$230.00MInsider
Fmr LLC1.40%10,853,199$167.36MInstitution
Blackrock Inc1.24%9,653,758$148.86MInstitution
Price T Rowe Associates Inc1.07%8,277,859$127.64MInstitution
State Street Corp0.91%7,028,160$108.37MInstitution
Vanguard Capital Management LLC0.74%5,711,802$88.08MInstitution

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SMMT vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SMMT8.35%91.65%Net BuyingNet Buying
AXSM62.19%37.81%Net SellingNet Selling
MDGL26.32%73.68%Net BuyingNet Selling
ARWR85.83%9.77%Net SellingNet Selling
IONS96.90%3.10%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, 168.16% Summit Therapeutics insiders, and 0.00% retail investors. Mahkam Zanganeh is the largest individual Summit Therapeutics shareholder, owning 644.47M shares representing 83.03% of the company. Mahkam Zanganeh's Summit Therapeutics shares are currently valued at $10.27B.

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