Adults with R/R or previously untreated del(17p) CLL received Ven 400 mg (via ramp-up) orally daily until progressive disease (PD) or intolerance. At end of study (median f/u, 70 mo), 48% of pts were alive, 24% were progression-free, and 16% remained on Ven, confirming the long-term activity of Ven in this high-risk population with del(17p) CLL and median 2 prior LOT. mPFS was shorter in pts with mutated SF3B1 (n=28) vs without (n=109; 16.4 vs 30.2 mo [P=.0071]).