Summit Therapeutics Inc.

Current report (Form 8-K) · Jun 1, 2026 · Other material event · Financial statements

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Other material event

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Jun 1, 2026

Overview Analysis Documents(43)Full text Exhibits(3)

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8-K

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smmt-20260530.htm

Document text
8-K · smmt-20260530.htm iXBRL 0001599298 2026-05-30 2026-05-30 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): May 30, 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 May 30, 2026, Summit Therapeutics Inc. (the “Company”) issued a press release announcing new results from the AK112-206 trial (“AK112-206”), a global, open-label, multicenter Phase II study in first-line metastatic colorectal cancer co-sponsored by the Company and its partner, Akeso, Inc. (“Akeso”), featuring ivonescimab. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein. On May 31, 2026, the Company issued a press release noting that Akeso published results from the Phase III HARMONi-6 trial or AK112-306 (“HARMONi-6”). HARMONi-6 is a single region, multi-center Phase III study conducted in China sponsored by Akeso with all relevant data exclusively generated, managed, and analyzed by Akeso. A copy of the press release is attached as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated by reference herein. The Company plans to utilize slides during its conference call scheduled for 7:00am ET on June 1, 2026, discussing the ivonescimab data from AK112-206 and HARMONi-6. A copy of the slides is attached as Exhibit 99.3 to this Current Report on Form 8-K and is incorporated by reference herein. Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit Number Description 99.1 Press Release, dated May 30, 2026 99.2 Press Release, dated May 31, 2026 99.3 Presentation Slides for June 1, 2026 Conference Call 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) 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 1, 2026 By: /s/ Manmeet S. Soni Chief Operating Officer, Chief Financial Officer and Director (Principal Financial Officer)

Document text

8-K · smmt-20260530.htm iXBRL

0001599298 2026-05-30 2026-05-30

 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): May 30, 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 May 30, 2026, Summit Therapeutics Inc. (the “Company”) issued a press release announcing new results from the AK112-206 trial (“AK112-206”), a global, open-label, multicenter Phase II study in first-line metastatic colorectal cancer co-sponsored by the Company and its partner, Akeso, Inc. (“Akeso”), featuring ivonescimab. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein.

 On May 31, 2026, the Company issued a press release noting that Akeso published results from the Phase III HARMONi-6 trial or AK112-306 (“HARMONi-6”). HARMONi-6 is a single region, multi-center Phase III study conducted in China sponsored by Akeso with all relevant data exclusively generated, managed, and analyzed by Akeso. A copy of the press release is attached as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated by reference herein.

 The Company plans to utilize slides during its conference call scheduled for 7:00am ET on June 1, 2026, discussing the ivonescimab data from AK112-206 and HARMONi-6. A copy of the slides is attached as Exhibit 99.3 to this Current Report on Form 8-K and is incorporated by reference herein.

 Item 9.01 Financial Statements and Exhibits.

 (d) Exhibits

 Exhibit Number
 Description
 99.1 Press Release, dated May 30, 2026

 99.2 Press Release, dated May 31, 2026

 99.3 Presentation Slides for June 1, 2026 Conference Call

 104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

 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 1, 2026 By: /s/ Manmeet S. Soni
     Chief Operating Officer, Chief Financial Officer and Director
     (Principal Financial Officer)

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