
SMMT Climbs on Ivonescimab Survival Edge as Keytruda Rivalry Intensifies
Summit Therapeutics (SMMT) surged after ASCO data showed Ivonescimab plus chemotherapy extended overall survival in advanced squamous NSCLC to 27.9 months vs 23.7 with a PD-1 inhibitor, with about 65% alive at two years versus 49% in the control. The results, independent of PD-L1 status, fuel investor optimism about Ivonescimab as a potential successor to Keytruda and have Pfizer, Bristol Myers Squibb, and Merck pursuing rival PD-(L)1xVEGF therapies. SMMT also has an FDA review for Ivonescimab in EGFR-mutated lung cancer, while retail sentiment on Stocktwits turned extremely bullish despite some regulatory questions about China-sourced data. Big Pharma stocks mostly declined overnight.









