Adults with previously untreated, HER2-negative, locally advanced, unresectable, or metastatic GC/GEJC...were randomized (1:1) to receive TIS 200 mg...In the ITT population, TIS + chemo showed statistically significant and clinically meaningful improvement in OS vs PBO + chemo and was well tolerated. These data support the TIS + chemo combination as a potential 1L treatment option for pts with advanced GC/GEJC.