smmt-20260602

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported): June 2, 2026


Summit Therapeutics Inc.
(Exact Name of Registrant as Specified in Its Charter)

Delaware	001-36866	37-1979717
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

601 Brickell Key Drive, Suite 1000, Miami, FL		33131
(Address of Principal Executive Offices)		(Zip Code)

Registrant’s Telephone Number, Including Area Code: (305) 203-2034


Not applicable
(Former Name or Former Address, If Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
Common stock, $0.01 par value per share	SMMT	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐


Item 8.01			Other Events.

On June 2, 2026, the Audit Committee and all independent directors of the Board of Directors of Summit Therapeutics Inc. (the “Company”) approved one or more Company affiliates to purchase shares of the Company’s common stock under the previously disclosed at-the-market offering with JP Morgan Securities LLC acting as Sales Agent (the “ATM”).

Separately, Mr. Robert Duggan, the Company’s Co-Chief Executive Officer and Chairman of the Board of Directors, Dr. Mahkam Zanganeh, the Company’s Co-Chief Executive Officer, President and Director, and Mr. Manmeet Soni, Chief Operating Officer, Chief Financial Officer and Director, have indicated that they are likely to purchase shares under the ATM in the near term, but they have not indicated the number of shares they intend to purchase nor have they made any formal binding commitments to do so. Any purchases of shares by these individuals would be at the prevailing market bid price or better.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.


	SUMMIT THERAPEUTICS INC.


Date: June 3, 2026	By:	/s/ Manmeet S. Soni
		Chief Operating Officer, Chief Financial Officer and Director
		(Principal Financial Officer)

Summit Therapeutics Inc. filed SEC Form 8-K: Other Events