Adult pts with metastatic LUAD who received ≥ 1 dose of first-line anti-PD1/PD-L1 ± chemotherapy...Within the KRAS G12C cohort, pts with STK11 mutations had statistically significant shorter TTNT (hazard ratio [HR] 2.7, 95% confidence internal [CI] 1.8-4.0, p < 0.0001)...This study provides real-world evidence that STK11 co-mutations are associated with worse outcomes among pts with KRAS G12C mutant LUAD treated with first-line ICI.