Six pts achieved partial response (43%; 1 confirmed, 5 unconfirmed) and 6 had stable disease (4 with tumor shrinkage > 20%). Several pts experienced early tumor shrinkage with major symptomatic improvement; 8 pts remain on treatment (duration 2-8 mo). Conclusions: Combined LEE011 + binimetinib shows promising preliminary antitumor activity in pts with NRAS-mutant melanoma.