RMC-4630

Evaluation of the antitumor effects of RMC-4630 and sotorasib in locally advanced or metastatic NSCLC patients with KRASG12C mutation with and without co-existing genetic aberrations in specific genes such as STK11/LKB1, KEAP1, and PIK3CA after failure of prior standard therapy. Objective Response Rate (%) is defined as the proportion of patients with Best Overall Response of confirmed CR, or PR. Response was confirmed by a repeat assessment no less than 28 days.

An adverse event (AE) was defined as any untoward medical occurrence in a participant, temporally associated with the use of a pharmaceutical / an investigational product, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a pre-existing condition that was temporally associated with the use of the Sponsor's product(s) was also an AE. All AEs and SAEs will be collected from the start of intervention until the safety visit or EOT visit, whichever is later. The number of safety-evaluable participants who experienced at least one treatment-emergent AE was reported per protocol.

Any toxicities occurring during the DLT observation period (cycle 1) that were considered R/T study treatment, including GR4 AEs; GR3 febrile neutropenia or hemorrhage; GR3 thrombocytopenia with clinically significant bleeding; GR ≥2 pneumonitis; GR3 hypertension or rash which does not improve or remains uncontrolled for \>5 or more days despite maximal supportive care; GR3 non hematologic AEs that remain uncontrolled for \>72 hours despite maximal supportive care; Concurrent elevation of AST or ALT \>3 × ULN \& total bilirubin \>2 × ULN or international normalized ratio (INR) \>1.5 in the absence of cholestasis and other causes; Grade 3 QTcF prolongation based on a triplicate ECG; Ejection fraction \<50% with an absolute decrease of \>10% from baseline; Retinal vein occlusion any grade; 50% or less dose intensity of RMC4630 and/or cobimetnib or osimertinib due to study drug related toxicity. Refer to protocol for further details.