This is a Phase 2/3, multisite, randomized, open-label study in participants with first-line non-small cell lung cancer (NSCLC).

This study includes two substudies (substudy A and substudy B) that will recruit participants according to histological subtypes due to differences in chemotherapy choice for standard-of-care and type of NSCLC.

A first in human study to evaluate the safety and preliminary antitumor activity of BBO-11818, a pan-KRAS inhibitor, in subjects with locally advanced unresectable or metastatic KRAS mutant solid tumors.