RecruitingPhase 2Drug trialFixed Duration Pirtobrutinib and Obinutuzumab in Chronic Lymphocytic LeukemiaThis study will evaluate fixed-duration therapy with pirtobrutinib and obinutuzumab given over 12 cycles (approximately 1 year) as first-line treatment of chronic lymphocytic leukemia or small lymphocytic lymphoma (CLL or SLL).