The primary objectives are to compare progression-free survival (PFS) and overall survival (OS) in participants who receive sotorasib with platinum doublet chemotherapy versus participants who receive pembrolizumab with platinum doublet chemotherapy.

Inclusion Criteria:

• Histologically or cytologically confirmed diagnosis of nonsquamous stage IV or advanced Stage IIIB or IIIC NSCLC with KRAS p. G12C mutation and negative for PD-L1 expression by central testing or local laboratory testing confirmed through central testing
• No history of systemic anticancer therapy in metastatic/non-curable settings
• Eastern Cooperative Oncology Group (ECOG) ≤ 1

Exclusion Criteria:

• Mixed histology NSCLC with either small-cell or large-cell neuroendocrine cell component or predominant squamous cell histology
• Participants with tumors known to harbor molecular alterations for which targeted therapy is locally approved as a front-line therapy
• Symptomatic (treated or untreated) brain metastases
• Gastrointestinal (GI) tract disease causing the inability to take oral medication
• Myocardial infarction within 6 months of randomization, unstable arrhythmias, or unstable angina
• Prior therapy with a KRAS G12C inhibitor

De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request

Data sharing requests relating to this study will be considered beginning 18 months after the study has ended and either 1) the product and indication have been granted marketing authorization in both the US and Europe or 2) clinical development for the product and/or indication discontinues and the data will not be submitted to regulatory authorities. There is no end date for eligibility to submit a data sharing request for this study.

Qualified researchers may submit a request containing the research objectives, the Amgen product(s) and Amgen study/studies in scope, endpoints/outcomes of interest, statistical analysis plan, data requirements, publication plan, and qualifications of the researcher(s). In general, Amgen does not grant external requests for individual patient data for the purpose of re-evaluating safety and efficacy issues already addressed in the product labelling. Requests are reviewed by a committee of internal advisors. If not approved, a Data Sharing Independent Review Panel will arbitrate and make the final decision. Upon approval, information necessary to address the research question will be provided under the terms of a data sharing agreement. This may include anonymized individual patient data and/or available supporting documents, containing fragments of analysis code where provided in analysis specifications. Further details are available at the URL below.