Summit Therapeutics Inc. ($SMMT) Insider Transactions

Last updated: 2026-03-16 13:03 UTC | Total transactions: 121

In the last 12 months, insiders at Summit Therapeutics Inc. ($SMMT) filed 121 transactions with the SEC: 27 open-market purchases totaling $521,473,766 and 0 sales totaling $0. Net insider sentiment: net buying.

Summit Therapeutics Inc. operates in the Pharmaceutical preparations industry (Life sciences sector).

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Recent Insider Transactions

Transaction Date Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Jan. 8, 2026 Anand Bhaskar Chief Accounting Officer A Stock Option (right to buy) 30000 $0.00 30,000.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Ronaghi Mostafa Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Clark Kenneth A Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Clark Kenneth A Director A Stock Option (right to buy) 17796 $8.76 17,796.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Cesano Alessandra Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Cesano Alessandra Director A Stock Option (right to buy) 3219 $8.76 3,219.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Huber Jeff Director A Stock Option (right to buy) 9885 $8.76 9,885.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Zanganeh Mahkam Co-Chief Executive Officer A Stock Option (right to buy) 11232 $8.76 11,232.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 DUGGAN ROBERT W Co-Chief Executive Officer A Stock Option (right to buy) 11232 $8.76 11,232.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Booth Robert F. Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Booth Robert F. Director A Stock Option (right to buy) 7180 $8.76 7,180.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Xia Yu Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 744,442,538 9999.99% 0.00%
Jan. 2, 2026 Huber Jeff Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 744,442,538 9999.99% 0.00%
Oct. 21, 2025 Zanganeh Mahkam Co-Chief Executive Officer A Common Stock 266808 $18.74 606,105,809.0000 744,442,538 0.04% 0.04%
Oct. 21, 2025 Zanganeh Mahkam Co-Chief Executive Officer A Common Stock 13980789 $18.74 606,105,809.0000 744,442,538 2.36% 1.88%
Oct. 21, 2025 Xia Yu Director P Common Stock 533617 $18.74 32,057,147.0000 744,442,538 1.69% 0.07%
Oct. 21, 2025 Anand Bhaskar Chief Accounting Officer A Common Stock 26680 $18.74 159,751.0000 744,442,538 20.05% 0.00%
Oct. 21, 2025 Soni Manmeet Singh COO and CFO A Common Stock 53361 $18.74 3,073,603.0000 744,442,538 1.77% 0.01%
Oct. 21, 2025 DUGGAN ROBERT W Co-Chief Executive Officer A Common Stock 13980789 $18.74 606,105,809.0000 744,442,538 2.36% 1.88%
Oct. 21, 2025 DUGGAN ROBERT W Co-Chief Executive Officer A Common Stock 266808 $18.74 606,105,809.0000 744,442,538 0.04% 0.04%
Oct. 21, 2025 DUGGAN ROBERT W Co-Chief Executive Officer P Common Stock 26680 $18.74 606,105,809.0000 744,442,538 0.00% 0.00%
Oct. 21, 2025 Zanganeh Mahkam Co-Chief Executive Officer P Common Stock 26680 $18.74 606,105,809.0000 744,442,538 0.00% 0.00%
Sept. 18, 2025 Anand Bhaskar Chief Accounting Officer A Stock Option (right to buy) 50000 $0.00 50,000.0000 737,679,704 9999.99% 0.01%
Sept. 11, 2025 DUGGAN ROBERT W Co-Chief Executive Officer P Common Stock 5000 $18.07 591,831,532.0000 737,679,704 0.00% 0.00%
Sept. 10, 2025 DUGGAN ROBERT W Co-Chief Executive Officer P Common Stock 333394 $17.68 591,826,532.0000 737,679,704 0.06% 0.05%
Sept. 11, 2025 Zanganeh Mahkam Co-Chief Executive Officer P Common Stock 5000 $18.07 591,831,532.0000 737,679,704 0.00% 0.00%
Sept. 10, 2025 Zanganeh Mahkam Co-Chief Executive Officer P Common Stock 333394 $17.68 591,826,532.0000 737,679,704 0.06% 0.05%
May 30, 2025 Zanganeh Mahkam Co-Chief Executive Officer M Stock Option (right to buy) 74545 $0.00 0.0000 737,679,704 100.00% 0.01%
May 30, 2025 DUGGAN ROBERT W Co-Chief Executive Officer M Stock Option (right to buy) 74545 $0.00 0.0000 737,679,704 100.00% 0.01%
May 30, 2025 Zanganeh Mahkam Co-Chief Executive Officer M Common Stock 74545 $2.64 591,493,138.0000 737,679,704 0.01% 0.01%
May 30, 2025 DUGGAN ROBERT W Co-Chief Executive Officer M Common Stock 74545 $2.64 591,493,138.0000 737,679,704 0.01% 0.01%
April 29, 2025 DUGGAN ROBERT W Co-Chief Executive Officer A Stock Option (right to buy) 400000 $0.00 400,000.0000 737,679,704 9999.99% 0.05%
April 29, 2025 Anand Bhaskar Chief Accounting Officer A Stock Option (right to buy) 600000 $0.00 600,000.0000 737,679,704 9999.99% 0.08%
April 29, 2025 Anand Bhaskar Chief Accounting Officer A Stock Option (right to buy) 75000 $0.00 75,000.0000 737,679,704 9999.99% 0.01%
April 29, 2025 Soni Manmeet Singh COO and CFO A Stock Option (right to buy) 11200000 $0.00 11,200,000.0000 737,679,704 9999.99% 1.52%
April 29, 2025 DUGGAN ROBERT W Co-Chief Executive Officer A Stock Option (right to buy) 1040000 $0.00 1,040,000.0000 737,679,704 9999.99% 0.14%
April 29, 2025 DUGGAN ROBERT W Co-Chief Executive Officer A Stock Option (right to buy) 9590558 $0.00 9,590,558.0000 737,679,704 9999.99% 1.30%
April 29, 2025 Zanganeh Mahkam Co-Chief Executive Officer A Stock Option (right to buy) 1040000 $0.00 1,040,000.0000 737,679,704 9999.99% 0.14%
April 29, 2025 Zanganeh Mahkam Co-Chief Executive Officer A Stock Option (right to buy) 400000 $0.00 400,000.0000 737,679,704 9999.99% 0.05%
April 29, 2025 Zanganeh Mahkam Co-Chief Executive Officer A Stock Option (right to buy) 9590558 $0.00 9,590,558.0000 737,679,704 9999.99% 1.30%
April 8, 2025 Zanganeh Mahkam Co-Chief Executive Officer X Common Stock 3985055 $1.58 591,418,593.0000 737,679,704 0.68% 0.54%
April 8, 2025 Zanganeh Mahkam Co-Chief Executive Officer X Warrant (right to buy) 3985055 $0.00 0.0000 737,679,704 0.00% 0.54%
April 8, 2025 DUGGAN ROBERT W Co-Chief Executive Officer X Common Stock 3985055 $1.58 591,418,593.0000 737,679,704 0.68% 0.54%
April 8, 2025 DUGGAN ROBERT W Co-Chief Executive Officer X Warrant (right to buy) 3985055 $0.00 0.0000 737,679,704 0.00% 0.54%
Jan. 12, 2025 Anand Bhaskar Chief Accounting Officer A Stock Option (right to buy) 75000 $0.00 75,000.0000 0 9999.99% 0.00%
Jan. 2, 2025 Booth Robert F. Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2025 Booth Robert F. Director A Stock Option (right to buy) 6855 $9.18 6,855.0000 0 9999.99% 0.00%
Jan. 2, 2025 Clark Kenneth A Director A Stock Option (right to buy) 16991 $9.18 16,991.0000 0 9999.99% 0.00%
Jan. 2, 2025 Clark Kenneth A Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2025 Ronaghi Mostafa Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2025 Cesano Alessandra Director A Stock Option (right to buy) 3073 $9.18 3,073.0000 0 9999.99% 0.00%
Jan. 2, 2025 Cesano Alessandra Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2025 Xia Yu Director A Stock Option (right to buy) 5438 $9.18 5,438.0000 0 9999.99% 0.00%
Jan. 2, 2025 Xia Yu Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2025 Huber Jeff Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2025 Zanganeh Mahkam Co-Chief Executive Officer A Stock Option (right to buy) 10724 $9.18 85,269.0000 0 14.39% 0.00%
Jan. 2, 2025 DUGGAN ROBERT W Co-Chief Executive Officer A Stock Option (right to buy) 10724 $9.18 14,617,245.0000 0 0.07% 0.00%
Oct. 11, 2024 Clark Kenneth A Director A Stock Option (right to buy) 200000 $0.00 200,000.0000 0 9999.99% 0.00%
Oct. 3, 2024 Zanganeh Mahkam Co-Chief Executive Officer X Common Stock 315681 $1.58 35,738,442.0000 0 0.89% 0.00%
Oct. 3, 2024 Zanganeh Mahkam Co-Chief Executive Officer X Warrant (right to buy) 315681 $0.00 0.0000 0 100.00% 0.00%
Sept. 11, 2024 Huber Jeff Director A Common Stock 44052 $22.70 50,052.0000 0 734.20% 0.00%
Sept. 11, 2024 DUGGAN ROBERT W Co-Chief Executive Officer A Common Stock 3325991 $22.70 551,695,096.0000 0 0.61% 0.00%
Sept. 11, 2024 Zanganeh Mahkam Co-Chief Executive Officer A Common Stock 44052 $22.70 35,422,761.0000 0 0.12% 0.00%
Sept. 11, 2024 Anand Bhaskar Chief Accounting Officer A Common Stock 22026 $22.70 131,426.0000 0 20.13% 0.00%
Sept. 11, 2024 Soni Manmeet Singh COO and CFO A Common Stock 44052 $22.70 3,020,242.0000 0 1.48% 0.00%
Aug. 23, 2024 Soni Manmeet Singh COO and CFO A Performance Stock Option (right to buy) 2800000 $0.00 2,800,000.0000 0 9999.99% 0.00%
Aug. 23, 2024 Zanganeh Mahkam Chief Executive Officer A Performance Stock Option (right to buy) 100000 $0.00 100,000.0000 0 9999.99% 0.00%
Aug. 23, 2024 Zanganeh Mahkam Chief Executive Officer A Performance Stock Option (right to buy) 260000 $0.00 260,000.0000 0 9999.99% 0.00%
Aug. 23, 2024 Zanganeh Mahkam Chief Executive Officer A Performance Stock Option (right to buy) 2397640 $0.00 2,397,640.0000 0 9999.99% 0.00%
June 27, 2024 Huber Jeff Director A Stock Option (right to buy) 200000 $0.00 200,000.0000 0 9999.99% 0.00%
June 27, 2024 Huber Jeff Director A Stock Option (right to buy) 17883 $0.00 217,883.0000 0 8.94% 0.00%
April 11, 2024 Ronaghi Mostafa Director A Stock Option (right to buy) 25315 $0.00 225,315.0000 0 12.66% 0.00%
April 11, 2024 Ronaghi Mostafa Director A Stock Option (right to buy) 200000 $0.00 200,000.0000 0 9999.99% 0.00%
April 2, 2024 Anand Bhaskar Chief Accounting Officer A Stock Option (right to buy) 600000 $0.00 600,000.0000 0 9999.99% 0.00%
April 2, 2024 Soni Manmeet Singh Chief Operating Officer A Stock Option (right to buy) 1100000 $0.00 1,100,000.0000 0 9999.99% 0.00%
March 26, 2024 Zanganeh Mahkam Chief Executive Officer P Common Stock 30000 $3.75 25,474,614.0000 0 0.12% 0.00%
March 27, 2024 Zanganeh Mahkam Chief Executive Officer P Common Stock 20000 $3.71 25,494,614.0000 0 0.08% 0.00%
March 27, 2024 Zanganeh Mahkam Chief Executive Officer P Common Stock 26000 $3.72 25,494,614.0000 0 0.10% 0.00%
March 26, 2024 Dhingra Ankur Chief Financial Officer P Common Stock 100000 $3.75 354,958.0000 0 39.22% 0.00%
March 27, 2024 Zanganeh Mahkam Chief Executive Officer P Common Stock 34321 $3.72 25,494,614.0000 0 0.13% 0.00%
Jan. 17, 2023 Xia Yu Director P Common Stock 10000000 $2.51 10,000,000.0000 0 9999.99% 0.00%
March 7, 2023 Xia Yu Director P Common Stock 21523530 $1.05 21,523,530.0000 0 9999.99% 0.00%
Jan. 2, 2024 DUGGAN ROBERT W Co-Chief Executive Officer A Stock Option (right to buy) 74545 $1.32 74,545.0000 0 9999.99% 0.00%
Jan. 2, 2024 Xia Yu Director A Stock Option (right to buy) 200000 $0.00 235,000.0000 0 571.43% 0.00%
Jan. 2, 2024 Xia Yu Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2024 Mahatme Ujwala Director A Stock Option (right to buy) 52575 $1.32 87,575.0000 0 150.21% 0.00%
Jan. 2, 2024 Mahatme Ujwala Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2024 Clark Kenneth A Director A Stock Option (right to buy) 70492 $1.32 105,492.0000 0 201.41% 0.00%
Jan. 2, 2024 Clark Kenneth A Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2024 Booth Robert F. Director A Stock Option (right to buy) 47651 $1.32 82,651.0000 0 136.15% 0.00%
Jan. 2, 2024 Booth Robert F. Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 2, 2024 Cesano Alessandra Director A Stock Option (right to buy) 21363 $1.32 56,363.0000 0 61.04% 0.00%
Jan. 2, 2024 Cesano Alessandra Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Dec. 11, 2023 Zanganeh Mahkam Chief Executive Officer X Warrant (right to buy) 315681 $0.00 0.0000 0 100.00% 0.00%
Dec. 11, 2023 Zanganeh Mahkam Chief Executive Officer X Warrant (right to buy) 489814 $0.00 0.0000 0 100.00% 0.00%
Dec. 11, 2023 Zanganeh Mahkam Chief Executive Officer X Common Stock 315681 $1.58 25,384,293.0000 0 1.26% 0.00%
Dec. 12, 2023 Zanganeh Mahkam Chief Executive Officer P Common Stock 5000 $2.07 25,384,293.0000 0 0.02% 0.00%
Dec. 11, 2023 Zanganeh Mahkam Chief Executive Officer X Common Stock 489814 $1.44 25,379,293.0000 0 1.97% 0.00%
Dec. 13, 2023 Dhingra Ankur Chief Financial Officer P Common Stock 19700 $2.17 254,958.0000 0 8.37% 0.00%
Dec. 13, 2023 Dhingra Ankur Chief Financial Officer P Common Stock 700 $2.15 235,258.0000 0 0.30% 0.00%
Oct. 13, 2023 Soni Manmeet Singh Chief Operating Officer P Common Stock 2976190 $1.68 2,976,190.0000 0 9999.99% 0.00%
Oct. 13, 2023 Zanganeh Mahkam Chief Executive Officer A Stock Option (right to buy) 11988198 $0.00 11,988,198.0000 0 9999.99% 0.00%
Oct. 13, 2023 Soni Manmeet Singh Chief Operating Officer A Stock Option (right to buy) 14000000 $0.00 14,000,000.0000 0 9999.99% 0.00%
March 8, 2023 Zanganeh Mahkam Co-CEO & President P Common Stock 16778415 $1.05 34,457,893.0000 0 94.90% 0.00%
March 8, 2023 Zanganeh Mahkam Co-CEO & President P Common Stock 6748629 $1.05 34,457,893.0000 0 24.36% 0.00%
March 8, 2023 Zanganeh Mahkam Co-Chief Executive Officer P Common Stock 6748629 $1.05 34,457,893.0000 0 24.36% 0.00%
March 6, 2023 DUGGAN ROBERT W Chief Executive Officer P Common Stock 376489880 $1.05 552,354,161.0000 0 214.08% 0.00%
March 7, 2023 Dhingra Ankur Chief Financial Officer P Common Stock 196362 $1.05 274,085.0000 0 252.64% 0.00%
Aug. 16, 2022 Dhingra Ankur Chief Financial Officer P Common Stock 13027 $0.97 77,723.0000 0 20.14% 0.00%
Aug. 16, 2022 Dhingra Ankur Chief Financial Officer P Common Stock 24658 $0.97 77,723.0000 0 46.47% 0.00%
March 8, 2023 Zanganeh Mahkam Co-Chief Executive Officer P Common Stock 15973743 $1.05 34,457,893.0000 0 86.42% 0.00%
March 8, 2023 Zanganeh Mahkam Co-Chief Executive Officer P Common Stock 804672 $1.05 34,457,893.0000 0 2.39% 0.00%
Jan. 3, 2023 Booth Robert F. Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 3, 2023 Cesano Alessandra Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 3, 2023 Cesano Alessandra Director A Stock Option (right to buy) 16350 $1.67 51,350.0000 0 46.71% 0.00%
Jan. 3, 2023 Mahatme Ujwala Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 3, 2023 Mahatme Ujwala Director A Stock Option (right to buy) 40500 $1.67 75,500.0000 0 115.71% 0.00%
Jan. 3, 2023 Clark Kenneth A Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 3, 2023 Clark Kenneth A Director A Stock Option (right to buy) 44400 $1.67 79,400.0000 0 126.86% 0.00%
Jan. 3, 2023 Soni Manmeet Singh Director A Stock Option (right to buy) 35000 $0.00 35,000.0000 0 9999.99% 0.00%
Jan. 3, 2023 Booth Robert F. Director A Stock Option (right to buy) 32700 $1.67 67,700.0000 0 93.43% 0.00%