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SMMT insider trading

Summit Therapeutics Inc. — open-market insider buys and $1M+ sells from SEC Forms 3, 4 and 5.
Insider buys · 24 mo
10
Bought · 24 mo
$126.6M
Buys · last 90 days
2 · $100.0M
Most recent buy
2026-06-12

Cluster buy detected

3 insiders bought SMMT within a short window (2026-06-04→2026-06-12), $103.6M in total — cluster score 80/100. Members see the buyers, the score breakdown and the chart.

See the cluster

Recent insider filings

FiledInsiderTypeSharesPriceValue
2026-06-12Zanganeh Mahkamcluster
Co-Chief Executive Officer
Bought3,810,000$13.12$50.0M
2026-06-12DUGGAN ROBERT Wcluster
Co-Chief Executive Officer
Bought3,810,000$13.12$50.0M
2026-06-04DUGGAN ROBERT Wcluster
Co-Chief Executive Officer
Bought100,000$14.60$1.5M
2026-06-04Zanganeh Mahkamcluster
Co-Chief Executive Officer
Bought100,000$14.60$1.5M
2026-06-04Soni Manmeet Singhcluster
COO and CFO
Bought50,000$14.45$722k
2025-10-23Xia Yucluster
Director
Bought533,617$18.74$10.0M
2025-10-23DUGGAN ROBERT Wcluster
Co-Chief Executive Officer
Bought26,680$18.74$500k
2025-10-23Zanganeh Mahkamcluster
Co-Chief Executive Officer
Bought26,680$18.74$500k
2025-09-11Zanganeh Mahkam
Co-Chief Executive Officer
Bought338,394$17.69$6.0M
2025-09-11DUGGAN ROBERT W
Co-Chief Executive Officer
Bought338,394$17.69$6.0M

Most active insider buyers

InsiderRoleBuysTotal bought
Zanganeh MahkamCo-Chief Executive Officer4$57.9M
DUGGAN ROBERT WCo-Chief Executive Officer4$57.9M
Xia YuDirector1$10.0M
Soni Manmeet SinghCOO and CFO1$722k

See SMMT on the chart

Every insider buy and sell for SMMT plotted on the price, the full two-year history, cluster scores and daily updates — in the members area, $29/month. A free quarterly sample of the whole dataset needs no account.

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Data from the SEC EDGAR ownership filings, refreshed daily. Only open-market purchases (transaction code P) and sales of $1M or more are shown; grants, option exercises and tax withholding are excluded because they run on schedules set years earlier. Not investment advice.