Phase 1/2 Study of Avutometinib (VS-6766) + Sotorasib With or Without Defactinib in KRAS G12C NSCLC Patients

Inclusion Criteria:

* Male or female patients ≥ 18 years of age
* Histologic or cytologic evidence of NSCLC
* Known KRAS G12C mutation
* Either exposed or not exposed to a KRAS inhibitor to be included in Part A (avutometinib + sotorasib + defactinib) and not exposed to KRAS inhibitor to be included in Part B (avutometinib + sotorasib + defactinib), Cohort 1
* Received at least 1 dose of a G12C inhibitor to be included in Part B, Cohort 2 (avutometinib + sotorasib + defactinib)
* Must have received appropriate treatment with at least one prior systemic regimen, but no more than 2 prior regimens, for Stage 3B-C or 4 NSCLC
* Measurable disease according to RECIST 1.1
* An Eastern Cooperative Group (ECOG) performance status ≤ 1
* Adequate organ function
* Adequate recovery from toxicities related to prior treatments
* Agreement to use highly effective method of contraceptive

Exclusion Criteria:

* Systemic anti-cancer therapy within 4 weeks of the first dose of study therapy
* History of prior malignancy, with the exception of curatively treated malignancies
* Major surgery within 4 weeks, minor surgery within 2 weeks (excluding placement of vascular access)
* History of treatment with a direct and specific inhibitor of MEK
* Exposure to strong CYP3A4 inhibitors or inducers within 14 days prior to the first dose and during the course of therapy
* Symptomatic brain metastases requiring steroids or other local interventions.
* Known SARS-Cov2 infection ≤28 days prior to first dose of study therapy
* Known hepatitis B, hepatitis C, or human immunodeficiency virus infection that is active
* Active skin disorder that has required systemic therapy within the past year
* History of rhabdomyolysis
* Concurrent ocular disorders
* Concurrent heart disease or severe obstructive pulmonary disease
* Inability to swallow oral medications
* Female patients that are pregnant or breastfeeding
* Previously treated with sotorasib and were dose reduced due to toxicity