Summit Therapeutics Inc. (SMMT) Insider Trading -- Recent Executive & Director Transactions

5 insiders reported 19 Form 4 transactions for Summit Therapeutics Inc. (SMMT) over the past 18 months (most recent 2026-06-12). Recent activity: DUGGAN ROBERT W (Co-Chief Executive Officer) Buy 3.8M shares, Zanganeh Mahkam (Co-Chief Executive Officer) Buy 3.8M shares, Xia Yu (Director) Buy 533,617 shares, Anand Bhaskar (Chief Accounting Officer) Buy 26,680 shares, Soni Manmeet Singh (COO and CFO) Buy 53,361 shares. Source: SEC Form 4.

DateInsiderTitleTypeSharesValue
2026-06-12DUGGAN ROBERT WCo-Chief Executive OfficerBuy3.8M$50.0M
2026-06-12Zanganeh MahkamCo-Chief Executive OfficerBuy3.8M$50.0M
2025-10-23Xia YuDirectorBuy533,617$10.0M
2025-10-23Anand BhaskarChief Accounting OfficerBuy26,680$499,983
2025-10-23Soni Manmeet SinghCOO and CFOBuy53,361$999,985
2025-10-23DUGGAN ROBERT WCo-Chief Executive OfficerBuy14.0M$262.0M
2025-10-23DUGGAN ROBERT WCo-Chief Executive OfficerBuy266,808$5.0M
2025-10-23DUGGAN ROBERT WCo-Chief Executive OfficerBuy26,680$499,983
2025-10-23Zanganeh MahkamCo-Chief Executive OfficerBuy266,808$5.0M
2025-10-23Zanganeh MahkamCo-Chief Executive OfficerBuy26,680$499,983
2025-10-23Zanganeh MahkamCo-Chief Executive OfficerBuy14.0M$262.0M
2025-09-11Zanganeh MahkamCo-Chief Executive OfficerBuy333,394$5.9M
2025-09-11Zanganeh MahkamCo-Chief Executive OfficerBuy5,000$90,350
2025-09-11DUGGAN ROBERT WCo-Chief Executive OfficerBuy333,394$5.9M
2025-09-11DUGGAN ROBERT WCo-Chief Executive OfficerBuy5,000$90,350
2025-06-02Zanganeh MahkamCo-Chief Executive OfficerBuy74,545$196,799
2025-06-02DUGGAN ROBERT WCo-Chief Executive OfficerBuy74,545$196,799
2025-04-09Zanganeh MahkamCo-Chief Executive OfficerBuy4.0M$6.3M
2025-04-09DUGGAN ROBERT WCo-Chief Executive OfficerBuy4.0M$6.3M

Source: SEC Form 4 filings · as of 2026-06-12