BELVA: This phase I trial is trying to understand the safety and activity of a new targeted therapy drug (belvarafenib) by itself, and in combination with other targeted and immunotherapy drugs, in people with NRAS-mutant advanced melanomaA Phase Ib, Open-Label, Multicenter Study to Evaluate the Safety, Pharmacokinetics, and Activity of Belvarafenib as a Single Agent and in Combination With Either Cobimetinib or Cobimetinib Plus Atezolizumab in Patients With NRAS-Mutant Advanced Melanoma Who Have Received Anti-PD-1/PD-L1 Therapy

Exclusion

• Prior treatment with a pan-RAF inhibitor
• Treatment with systemic immunotherapy agents (e.g., anti-CTLA4, anti-PD(L)1, cytokine therapy, investigational therapy, etc.) within 28 days prior to C1D1
• Symptomatic, untreated, or actively progressing CNS metastases
• History or signs/symptoms of clinically significant cardiovascular disease
• Known clinically significant liver disease
• History of autoimmune disease or immune deficiency
• Prior treatment with a MEK inhibitor (cobimetinib arm)
• History of or evidence of retinal pathology on ophthalmologic examination (cobimetinib arm)
• History of immune-related AE attributed to prior anti-PD(L)1 therapy that resulted in permanent discontinuation of anti-PD(L)1 therapy (nivolumab arm)