A total of 142 patients were included in the naporafenib dose-escalation (n=87), naporafenib/spartalizumab dose-escalation (n=12) and naporafenib/spartalizumab dose-expansion (n=43) arms...Two partial responses (PRs) occurred in naporafenib escalation, and 1 complete response and 3 PRs in the naporafenib/spartalizumab NRAS-mutated melanoma and KRAS-mutated NSCLC arms, respectively.