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Summit issued a press release on May 30, 2025, "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. Following this news, Summit's stock price fell over 30% on the same day.
In order to be eligible to join the SMMT class action lawsuit, you must have incurred a loss on shares of Summit Therapeutics purchased during the class period listed above.
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