ACCURACY is an open-label, multicenter phase II study of AL101 (4 and 6 mg intravenous QW) in subjects with R/M ACC and known Notch1-4mut (ASCO ‘19, Abstr TPS6098). Subjects require evidence of disease progression within 6 months of entry or newly diagnosed metastatic disease and an ECOG performance status of 0-1. Primary end point was overall response rate (ORR) by RECIST v1.1 (or modified MD Anderson bone criteria), as assessed by investigators. Secondary end points were ORR by central review, duration of response, and safety. The study provides ≥80% power to detect an increase of the ORR from 8% to 25% using a type I error of 5%.AL101 6 mg QW appears to be well tolerated in Notchmut R/M ACC.