The trial enrolled 106 patients who had received at least one prior therapy with 17p deletion, as detected by an FDA-approved CLL fluorescence in situ hybridization (FISH) probe kit. Patients had a median of 2.5 prior treatments (range 1-10). The ORR by IRC was 80% (95% CI: 71%, 87%) with 8% complete remission (including 2% complete remission with incomplete marrow recovery). Minimal residual disease (MRD) was evaluated in peripheral blood and bone marrow for patients who achieved CR or CRi, following treatment with venetoclax. Three percent of the patients in the intent-to-treat population achieved a complete remission (CR or CRi) and were also negative for MRD in the bone marrow and peripheral blood. The median time to first response was 0.8 months (range: 0.1 to 8.1 months). Median duration of response (DOR) has not been reached with approximately 12 months median follow-up. The DOR ranged from 2.9 to more than 19.0 months.