In EMPOWER-Lung 3 part 1, 323 pts with PD-L1 expression of <50% were randomized (1:1:1) to: standard platinum-based doublet chemo for 4 cycles (StC), cemi 350 mg once every 3 weeks (Q3W)….Med PFS was 6.4m vs 6.3m with HR of 0.813 (0.596, 1.108). ORR was 35.8% and 28.3% for CIC and StC, respectively. Med duration of response was 15.9m vs 6.3m. Safety profile was generally consistent with the known safety profile for cemi, chemo, and ipi....In this descriptive analysis, the addition of cemi and ipi to a reduced course of chemo led to a meaningful OS benefit in pts with PD-L1 <50%.