Biotechnology Florida, USA-based Summit Therapeutics saw its share rise 6.2% to $23.50 pre-market on the news of a clinical trial collaboration with Pfizer to evaluate ivonescimab, a novel, investigational PD-1 / VEGF bispecific antibody, in combination with several of the US pharma giant’s antibody drug conjugates (ADCs) across multiple solid tumor settings. 25 February 2025