Form4insider filings, from the source

Company · CIK 0001599298 · SIC 2834 — Pharmaceutical Preparations · Nasdaq

Summit Therapeutics Inc. · SMMT

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $103.6M · 5sales $0 · 0net $103.6M
$10k$10k$1M$1M$100M$100MbuyssalesMar 28Apr 27May 28Jun 28Jul 29Aug 29Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jun 12, 2026 PForm 4 →Jun 12, 2:35 pm EDTMahkam ZanganehCo-Chief Executive Officer, Director, 10% Owner3,810,000$13.12$49,987,200573,883,879+0.67%
Jun 12, 2026 PForm 4 →Jun 12, 12:28 pm EDTRobert W DugganCo-Chief Executive Officer, Director, 10% Owner3,810,000$13.12$49,987,200573,883,879+0.67%
Jun 4, 2026 PForm 4 →Jun 4, 6:08 pm EDTRobert W DugganCo-Chief Executive Officer, Director, 10% Owner100,000$14.60$1,460,00025,824,474+0.39%
Jun 4, 2026 PForm 4 →Jun 4, 5:45 pm EDTMahkam ZanganehCo-Chief Executive Officer, Director, 10% Owner100,000$14.60$1,460,00025,824,474+0.39%
Jun 4, 2026 PForm 4 →Jun 4, 4:40 pm EDTManmeet Singh SoniCOO and CFO, Director50,000$14.45$722,2503,123,603+1.63%

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.