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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 Zanganeh80.79%644,473,702$8.45BInsider
Robert W. Duggan76.47%610,015,809$8.00BInsider
Yu Xia4.02%32,057,147$420.27MInsider
Maky Zanganeh1.87%14,915,775$195.55MInsider
Manmeet Singh Soni0.39%3,123,603$40.95MInsider
Ankur Dhingra0.05%394,485$5.17MInsider
Bhaskar Anand0.02%159,751$2.09MInsider
Jeff Huber0.01%56,052$734.84kInsider
Baker Bros Advisors LP0.00%32,786$429.82kInstitution
Bakbro0.00%32,786$429.82kInstitution

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SMMT vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
SMMT0.01%99.99%Net BuyingNet Buying
KRYS0.10%24.37%Net SellingNet Selling
IONS0.11%3.34%Net SellingNet Selling
PTGX0.12%22.54%Net SellingNet Buying
KYMR0.12%31.95%Net SellingNet Selling
View Top Biotech Stocks

Summit Therapeutics Stock Ownership FAQ

Who owns Summit Therapeutics?

Summit Therapeutics (NASDAQ: SMMT) is owned by 0.02% institutional shareholders, 163.61% Summit Therapeutics insiders, and 0.00% retail investors. Mahkam Zanganeh is the largest individual Summit Therapeutics shareholder, owning 644.47M shares representing 80.79% of the company. Mahkam Zanganeh's Summit Therapeutics shares are currently valued at $8.01B.

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