Insider holders · CIK 0001599298
Summit Therapeutics Inc. · SMMT
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| Robert W DugganCo-Chief Executive Officer | 573,883,879 | 10,199,776 | 584,083,655 | Jun 12, 2026 · 12:28 pm EDT | Form 4 |
| Mahkam ZanganehCo-Chief Executive Officer | 31,000 | 10,199,776 | 10,230,776 | Jun 12, 2026 · 2:35 pm EDT | Form 4 |
| Manmeet Singh SoniCOO and CFO | 3,123,603 | — | 3,123,603 | Jun 4, 2026 · 4:40 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.