Robert W. Duggan - 02 Jan 2026 Form 4 Insider Report for Summit Therapeutics Inc. (SMMT)

Role: Co-Chief Executive Officer, Director, 10%+ Owner
Signature: /s/ Robert W. Duggan
Issuer symbol: SMMT
Transactions as of: 02 Jan 2026
Net transactions value: +$98,392
Form type: 4
Filing time: 06 Jan 2026, 19:50:20 UTC
Previous filing: 23 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
DUGGAN ROBERT W	Co-Chief Executive Officer, Director, 10%+ Owner	C/O SUMMIT THERAPEUTICS INC., 601 BRICKELL KEY DRIVE SUITE 1000, MIAMI	/s/ Robert W. Duggan	06 Jan 2026	0001055919

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SMMT	Stock Option (right to buy)	Award	$98,392	+11,232		$8.76	11,232	02 Jan 2026	Common Stock	11,232	$17.52	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The option was granted on January 2, 2026. The shares underlying the option shall vest in four quarterly installments on March 31, June 30, September 30 and December 31 following election, subject to the reporting person remaining as a non-salaried director on each such vesting date.
F2	The option was issued to the reporting person pursuant to the issuer's Director Retainer Option Election Plan in lieu of retainer fees of $98,400.