Robert Duggan Insider Trades & Stock Holdings

Co-Chief Executive Officer · Summit Therapeutics Inc. · Latest filing Jun 12, 2026

Robert Duggan, Co-Chief Executive Officer at Summit Therapeutics Inc. has 2 Form 4 trades on file since Jun 12, 2026. Open-market activity: 2 purchases ($99.97M) and 0 sales ($0), net +$99.97M. Latest filing: acquired 3.81M shares of $SMMT on Jun 12, 2026 at $13.12.

Trades on file

2

Open-market bought

$99.97M

Open-market sold

$0

Net open-market

+$99.97M

Latest filing

Jun 12, 2026

All insider trades by Robert Duggan

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Jun 12, 2026	$SMMT	Buy (Open-market buy)	3.81M	$13.12	$49.99M						Co-Chief Executive Officer		—
Jun 12, 2026	$SMMT	Buy (Open-market buy)	3.81M	$13.12	$49.99M						Co-Chief Executive Officer		—

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Robert Duggan traded

• $SMMT

Frequently asked questions

Has Robert Duggan been buying or selling stock?

Robert Duggan has 2 open-market purchases and 0 open-market sales on file, net +$99.97M. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Robert Duggan's latest insider trade?

acquired 3.81M shares of $SMMT on Jun 12, 2026 at $13.12.

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.