BioNTech Advances Phase 3 Clinical Trial of Pumitamig in Combination with Gilead’s TROP2-Directed ADC Sacituzumab Govitecan in Triple-Negative Breast Cancer

MAINZ, Germany, October 22, 2026 – BioNTech SE (Nasdaq: BNTX, “BioNTech”) today announced a clinical trial collaboration and supply agreement with Gilead Sciences Inc. (“Gilead”) to evaluate pumitamig in combination with the TROP2-directed antibody-drug conjugate (“ADC”) sacituzumab govitecan (Trodelvy ® ) as first-line treatment for patients with locally advanced or metastatic PD-L1 low or negative triple-negative breast cancer (“TNBC”). Pumitamig is an investigational bispecific immunomodulator designed to cooperatively bind to PD-L1 and VEGF-A that is being jointly developed by BioNTech and Bristol Myers Squibb (“BMS”).