NEW YORK, NY / ACCESS Newswire / September 11, 2025 / Bronstein, Gewirtz & Grossman, LLC is investigating potential claims on behalf of purchasers of Summit Therapeutics Inc. ("Summit" or "the Company") (NASDAQ:SMMT). Investors who purchased Summit securities are encouraged to obtain additional information and assist the investigation by visiting the firm’s site: bgandg.com/SMMT.
Investigation Details
On May 30, 2025, Summit issued a press release "announc[ing] topline results from the Phase III clinical trial, HARMONi, the first global Phase III study evaluating ivonescimab[.]" Although patients treated with ivonescimab and chemotherapy were 48% less likely to progress or die than patients who received chemo alone, the drug failed to make a statistically significant difference in overall survival, a metric that measures how long patients live before dying of any cause. On this news, Summit’s stock price fell $7.99 per share, or 30.5%, to close at $18.22 per share on May 30, 2025. Then, on September 7, 2025, Summit announced additional data from the trial, in which ivonescimab produced weaker results in patients from North America and Europe than in those from Europe. On this news, Summit’s stock price fell $6.54 per share, or 25.15%, to close at $19.45 per share on September 8, 2025.
What’s Next?
If you are aware of any facts relating to this investigation or purchased Summit securities, you can assist this investigation by visiting the firm’s site: bgandg.com/SMMT. You can also contact Peretz Bronstein or his client relations manager, Nathan Miller, of Bronstein, Gewirtz & Grossman, LLC: 332-239-2660
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Contact
Bronstein, Gewirtz & Grossman, LLC
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SOURCE: Bronstein, Gewirtz & Grossman, LLC
View the original press release on ACCESS Newswire
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