SMMT (Summit Therapeutics Inc. Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by SMMT officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-12 | ROBERT W DUGGAN | Co-Chief Executive Officer | Buy | — | — |
| 2026-06-12 | Mahkam Zanganeh | Co-Chief Executive Officer | Buy | — | — |
| 2026-06-04 | Manmeet Singh Soni | COO and CFO | Buy | — | — |
| 2026-06-04 | Mahkam Zanganeh | Co-Chief Executive Officer | Buy | — | — |
| 2026-06-04 | ROBERT W DUGGAN | Co-Chief Executive Officer | Buy | — | — |
| 2026-01-12 | Bhaskar Anand | Chief Accounting Officer | A | — | — |
| 2026-01-06 | Alessandra Cesano | Director | A | — | — |
| 2026-01-06 | Kenneth A Clark | Director | A | — | — |
| 2026-01-06 | Mostafa Ronaghi | Director | A | — | — |
| 2026-01-06 | Jeff Huber | Director | A | — | — |
| 2026-01-06 | Yu Xia | Director | A | — | — |
| 2026-01-06 | Robert F. Booth | Director | A | — | — |
| 2026-01-06 | ROBERT W DUGGAN | Co-Chief Executive Officer | A | — | — |
| 2026-01-06 | Mahkam Zanganeh | Co-Chief Executive Officer | A | — | — |
| 2025-10-23 | Mahkam Zanganeh | Co-Chief Executive Officer | MIXED | — | — |
| 2025-10-23 | ROBERT W DUGGAN | Co-Chief Executive Officer | MIXED | — | — |
| 2025-10-23 | Manmeet Singh Soni | COO and CFO | A | — | — |
| 2025-10-23 | Bhaskar Anand | Chief Accounting Officer | A | — | — |
| 2025-10-23 | Yu Xia | Director | Buy | — | — |
| 2025-09-19 | Bhaskar Anand | Chief Accounting Officer | A | — | — |
| 2025-09-11 | ROBERT W DUGGAN | Co-Chief Executive Officer | Buy | — | — |
| 2025-09-11 | Mahkam Zanganeh | Co-Chief Executive Officer | Buy | — | — |
| 2025-06-02 | ROBERT W DUGGAN | Co-Chief Executive Officer | M | — | — |
| 2025-06-02 | Mahkam Zanganeh | Co-Chief Executive Officer | M | — | — |
| 2025-05-01 | Mahkam Zanganeh | Co-Chief Executive Officer | A | — | — |
| 2025-05-01 | ROBERT W DUGGAN | Co-Chief Executive Officer | A | — | — |
| 2025-05-01 | Manmeet Singh Soni | COO and CFO | A | — | — |
| 2025-05-01 | Bhaskar Anand | Chief Accounting Officer | A | — | — |
| 2025-04-09 | ROBERT W DUGGAN | Co-Chief Executive Officer | X | — | — |
| 2025-04-09 | Mahkam Zanganeh | Co-Chief Executive Officer | X | — | — |
| 2025-01-14 | Bhaskar Anand | Chief Accounting Officer | A | — | — |
| 2025-01-06 | Robert F. Booth | Director | A | — | — |
| 2025-01-06 | Kenneth A Clark | Director | A | — | — |
| 2025-01-06 | Mostafa Ronaghi | Director | A | — | — |
| 2025-01-06 | Alessandra Cesano | Director | A | — | — |
| 2025-01-06 | Yu Xia | Director | A | — | — |
| 2025-01-06 | Jeff Huber | Director | A | — | — |
| 2025-01-06 | Mahkam Zanganeh | Co-Chief Executive Officer | A | — | — |
| 2025-01-06 | ROBERT W DUGGAN | Co-Chief Executive Officer | A | — | — |
| 2024-10-15 | Kenneth A Clark | Director | A | — | — |
| 2024-10-03 | Mahkam Zanganeh | Co-Chief Executive Officer | X | — | — |
| 2024-09-13 | Bhaskar Anand | Chief Accounting Officer | A | — | — |
| 2024-09-13 | Manmeet Singh Soni | COO and CFO | A | — | — |
| 2024-09-13 | Jeff Huber | Director | A | — | — |
| 2024-09-13 | ROBERT W DUGGAN | Co-Chief Executive Officer | A | — | — |
| 2024-09-13 | Mahkam Zanganeh | Co-Chief Executive Officer | A | — | — |
| 2024-08-23 | Mahkam Zanganeh | Chief Executive Officer | A | — | — |
| 2024-08-23 | Manmeet Singh Soni | COO and CFO | A | — | — |
| 2024-06-27 | Jeff Huber | Director | A | — | — |
| 2024-04-15 | Mostafa Ronaghi | Director | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Co-Chief Executive Officer | 599,708,353 | — |
| — | Director | 32,057,147 | — |
| — | Co-Chief Executive Officer | 25,855,474 | — |
| — | COO and CFO | 3,098,603 | — |
| — | Chief Financial Officer | 394,485 | — |
| — | Chief Accounting Officer | 159,751 | — |
| — | Director | 6,000 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the SMMT quote page; the site-wide leaderboard is on the insider transactions hub.