Summit Therapeutics Inc. (SMMT)

Latest Insider Confidence Score

2026Q1

57.3
Bullish

Company insider confidence (by quarter)

2020Q3 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Xia Yu Director 32,057,147 Oct 23, 2025
Duggan Robert W CEO 10,230,776 Oct 23, 2025
Zanganeh Mahkam CEO 10,230,776 Oct 23, 2025
Soni Manmeet Singh COO 3,073,603 Oct 23, 2025
Dhingra Ankur CFO 354,958 Mar 27, 2024

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Jan 8, 2026 Jan 12, 2026 Anand Bhaskar Chief Accounting Officer Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Zanganeh Mahkam CEO Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 DUGGAN ROBERT W CEO Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Booth Robert F. Director Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Xia Yu Director Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Huber Jeff Director Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Ronaghi Mostafa Director Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Clark Kenneth A Director Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Cesano Alessandra Director Neutral 52.5 - 0.00% -
Oct 21, 2025 Oct 23, 2025 Xia Yu Director Buy 88.8 +533,617 1.69% $10M
Oct 21, 2025 Oct 23, 2025 Anand Bhaskar Chief Accounting Officer Neutral 90.0 +26,680 20.05% -
Oct 21, 2025 Oct 23, 2025 Soni Manmeet Singh CFO Neutral 77.5 +53,361 1.77% -
Oct 21, 2025 Oct 23, 2025 DUGGAN ROBERT W CEO Buy 85.0 +14,274,277 2.41% $500K
Oct 21, 2025 Oct 23, 2025 Zanganeh Mahkam CEO Buy 85.0 +14,274,277 2.41% $500K
Sep 18, 2025 Sep 19, 2025 Anand Bhaskar Chief Accounting Officer Neutral 52.5 - 0.00% -
Sep 10, 2025 Sep 11, 2025 Zanganeh Mahkam CEO Buy 66.3 +338,394 0.06% $6M
Sep 10, 2025 Sep 11, 2025 DUGGAN ROBERT W CEO Buy 66.3 +338,394 0.06% $6M
May 30, 2025 Jun 2, 2025 Zanganeh Mahkam CEO Neutral 52.5 - 0.00% -
May 30, 2025 Jun 2, 2025 DUGGAN ROBERT W CEO Neutral 52.5 - 0.00% -
Apr 29, 2025 May 1, 2025 Anand Bhaskar Chief Accounting Officer Neutral 52.5 - 0.00% -
Apr 29, 2025 May 1, 2025 Soni Manmeet Singh CFO Neutral 52.5 - 0.00% -
Apr 29, 2025 May 1, 2025 DUGGAN ROBERT W CEO Neutral 52.5 - 0.00% -
Apr 29, 2025 May 1, 2025 Zanganeh Mahkam CEO Neutral 52.5 - 0.00% -
Apr 8, 2025 Apr 9, 2025 Zanganeh Mahkam CEO Neutral 52.5 - 0.00% -
Apr 8, 2025 Apr 9, 2025 DUGGAN ROBERT W CEO Neutral 52.5 - 0.00% -
Jan 12, 2025 Jan 14, 2025 Anand Bhaskar Chief Accounting Officer Neutral 52.5 - 0.00% -
Jan 2, 2025 Jan 6, 2025 DUGGAN ROBERT W CEO Neutral 52.5 - 0.00% -
Jan 2, 2025 Jan 6, 2025 Zanganeh Mahkam CEO Neutral 52.5 - 0.00% -
Jan 2, 2025 Jan 6, 2025 Huber Jeff Director Neutral 52.5 - 0.00% -
Jan 2, 2025 Jan 6, 2025 Xia Yu Director Neutral 52.5 - 0.00% -
Jan 2, 2025 Jan 6, 2025 Cesano Alessandra Director Neutral 52.5 - 0.00% -
Jan 2, 2025 Jan 6, 2025 Ronaghi Mostafa Director Neutral 52.5 - 0.00% -
Jan 2, 2025 Jan 6, 2025 Clark Kenneth A Director Neutral 52.5 - 0.00% -
Jan 2, 2025 Jan 6, 2025 Booth Robert F. Director Neutral 52.5 - 0.00% -
Oct 11, 2024 Oct 15, 2024 Clark Kenneth A Director Neutral 52.5 - 0.00% -
Oct 3, 2024 Oct 3, 2024 Zanganeh Mahkam CEO Neutral 52.5 - 0.00% -
Sep 11, 2024 Sep 13, 2024 Zanganeh Mahkam CEO Neutral 55.0 +44,052 0.12% -
Sep 11, 2024 Sep 13, 2024 DUGGAN ROBERT W CEO Neutral 67.5 +3,325,991 0.61% -
Sep 11, 2024 Sep 13, 2024 Huber Jeff Director Neutral 90.0 +44,052 734.20% -
Sep 11, 2024 Sep 13, 2024 Soni Manmeet Singh CFO Neutral 77.5 +44,052 1.48% -
Sep 11, 2024 Sep 13, 2024 Anand Bhaskar Chief Accounting Officer Neutral 90.0 +22,026 20.13% -
Aug 23, 2024 Aug 23, 2024 Soni Manmeet Singh CFO Neutral 52.5 - 0.00% -
Aug 23, 2024 Aug 23, 2024 Zanganeh Mahkam CEO Neutral 52.5 - 0.00% -
Jun 27, 2024 Jun 27, 2024 Huber Jeff Director Neutral 52.5 - 0.00% -
Jun 27, 2024 Huber Jeff Director Neutral 52.5 - 0.00% -
Apr 11, 2024 Apr 15, 2024 Ronaghi Mostafa Director Neutral 52.5 - 0.00% -
Apr 15, 2024 Ronaghi Mostafa Director Neutral 52.5 - 0.00% -
Apr 2, 2024 Apr 4, 2024 Soni Manmeet Singh COO Neutral 52.5 - 0.00% -
Apr 2, 2024 Apr 4, 2024 Anand Bhaskar Chief Accounting Officer Neutral 52.5 - 0.00% -
Apr 4, 2024 Anand Bhaskar Chief Accounting Officer Neutral 52.5 - 0.00% -
Mar 27, 2024 Mar 27, 2024 Zanganeh Mahkam CEO Buy 67.5 +110,321 0.43% $411.1K
Mar 26, 2024 Mar 27, 2024 Dhingra Ankur CFO Buy 97.5 +100,000 39.22% $375K
Mar 7, 2023 Feb 14, 2024 Xia Yu Director Buy 100.0 +31,523,530 100.00% $47.7M
Jan 2, 2024 Jan 4, 2024 Cesano Alessandra Director Neutral 52.5 - 0.00% -
Jan 2, 2024 Jan 4, 2024 Booth Robert F. Director Neutral 52.5 - 0.00% -
Jan 2, 2024 Jan 4, 2024 Clark Kenneth A Director Neutral 52.5 - 0.00% -
Jan 2, 2024 Jan 4, 2024 Mahatme Ujwala Director Neutral 52.5 - 0.00% -
Jan 2, 2024 Jan 4, 2024 Xia Yu Director Neutral 52.5 - 0.00% -
Jan 2, 2024 Jan 4, 2024 DUGGAN ROBERT W CEO Neutral 52.5 - 0.00% -
Dec 11, 2023 Dec 13, 2023 Zanganeh Mahkam CEO Buy 78.8 +5,000 1.02% $10.4K
Dec 13, 2023 Dec 13, 2023 Dhingra Ankur CFO Buy 86.3 +20,400 8.70% $44.3K
Oct 13, 2023 Oct 16, 2023 Zanganeh Mahkam CEO Neutral 52.5 - 0.00% -
Oct 13, 2023 Oct 16, 2023 Soni Manmeet Singh COO Buy 100.0 +2,976,190 100.00% $5M
Mar 8, 2023 Mar 13, 2023 Zanganeh Mahkam CEO Buy 100.0 +23,527,044 215.24% $24.7M
Mar 8, 2023 Mar 8, 2023 Zanganeh Mahkam CEO Buy 100.0 +23,527,044 215.24% $24.7M
Mar 7, 2023 Mar 8, 2023 Dhingra Ankur CFO Buy 95.0 +196,362 252.64% $206.2K
Aug 16, 2022 Mar 8, 2023 Dhingra Ankur CFO Buy 91.3 +37,685 94.12% $36.6K
Mar 6, 2023 Mar 8, 2023 DUGGAN ROBERT W CEO Buy 100.0 +376,489,880 214.08% $395.3M
Jan 26, 2023 Xia Yu Director Neutral 52.5 - 0.00% -
Jan 3, 2023 Jan 5, 2023 Booth Robert F. Director Neutral 52.5 - 0.00% -
Jan 3, 2023 Jan 5, 2023 Cesano Alessandra Director Neutral 52.5 - 0.00% -
Jan 3, 2023 Jan 5, 2023 Mahatme Ujwala Director Neutral 52.5 - 0.00% -
Jan 3, 2023 Jan 5, 2023 Clark Kenneth A Director Neutral 52.5 - 0.00% -
Jan 3, 2023 Jan 5, 2023 Soni Manmeet Singh Director Neutral 52.5 - 0.00% -
Dec 6, 2022 Dec 9, 2022 Zanganeh Mahkam CEO Neutral 82.5 +373,857 3.54% -
Dec 6, 2022 Dec 8, 2022 DUGGAN ROBERT W CEO Neutral 85.0 +9,346,434 5.75% -
Nov 15, 2022 Nov 17, 2022 Cesano Alessandra Director Neutral 52.5 - 0.00% -
Nov 17, 2022 Cesano Alessandra Director Neutral 52.5 - 0.00% -
Oct 3, 2022 Booth Robert F. Director Neutral 52.5 - 0.00% -
Sep 28, 2022 Oct 3, 2022 Booth Robert F. Director Neutral 52.5 - 0.00% -
Aug 16, 2022 Aug 18, 2022 DUGGAN ROBERT W CEO Buy 100.0 +94,849,203 140.14% $92M
Aug 16, 2022 Aug 18, 2022 Zanganeh Maky CEO Buy 100.0 +5,809,132 122.35% $5.6M
Aug 16, 2022 Aug 17, 2022 Dhingra Ankur CFO Buy 91.3 +36,215 90.45% $35.1K
Jun 2, 2022 Dhingra Ankur CFO Neutral 52.5 - 0.00% -
May 31, 2022 Jun 2, 2022 Dhingra Ankur CFO Neutral 52.5 - 0.00% -
May 23, 2022 May 25, 2022 DUGGAN ROBERT W CEO Neutral 47.5 +21,135 0.03% -
Apr 25, 2022 Apr 26, 2022 Gayko Urte Director Neutral 52.5 - 0.00% -
Jan 3, 2022 Jan 5, 2022 Gayko Urte Director Neutral 52.5 - 0.00% -
Jan 3, 2022 Jan 5, 2022 Mahatme Ujwala Director Neutral 52.5 - 0.00% -
Jan 3, 2022 Jan 5, 2022 Soni Manmeet Singh Director Neutral 52.5 - 0.00% -
Jan 3, 2022 Jan 5, 2022 Clark Kenneth A Director Neutral 52.5 - 0.00% -
Dec 15, 2021 Dec 17, 2021 Zanganeh Maky COO Neutral 52.5 - 0.00% -
Dec 15, 2021 Dec 17, 2021 Maranian Jeffrey R VP Corporate Controller Neutral 52.5 - 0.00% -
Nov 3, 2021 Nov 16, 2021 Gayko Urte Director Neutral 52.5 - 0.00% -
Nov 16, 2021 Gayko Urte Director Neutral 52.5 - 0.00% -
Nov 11, 2021 Nov 15, 2021 Maranian Jeffrey R VP Corporate Controller Neutral 52.5 - 0.00% -
Oct 7, 2021 Oct 12, 2021 Clark Kenneth A Director Neutral 52.5 - 0.00% -
Oct 12, 2021 Clark Kenneth A Director Neutral 52.5 - 0.00% -
Jul 9, 2021 Maranian Jeffrey R VP, Corporate Controller Neutral 52.5 - 0.00% -
May 12, 2021 May 14, 2021 DUGGAN ROBERT W CEO Buy 100.0 +11,365,921 20.19% $59.6M