Merck Sharp & Dohme LLC
The purpose of this study is to evaluate the safety and efficacy of nemtabrutinib (formerly ARQ 531) in participants with hematologic malignancies of chronic lymphocytic leukemia (CLL)/ small lymphocytic lymphoma (SLL), Richter's transformation, marginal zone lymphoma (MZL), mantle cell lymphoma (MCL), follicular lymphoma (FL), and Waldenström's macroglobulinemia (WM).
This study will be performed in 2 parts: Dose Escalation and Confirmation (Part 1) and Cohort Expansion (Part 2). Following determination of the recommended phase 2 dose (RP2D) in Part 1, the study plans to proceed with Part 2 using 8 disease-specific expansion cohorts (Cohorts A to H).
Inclusion Criteria: * Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2 within 7 days before C1D1 (the first dose of study treatment) * Has a life expectancy of at least 3 months, based on the investigator assessment * Has the ability to swallow and retain oral medication * Participants who are Hepatitis B surface antigen (HBsAg)-positive are eligible if they have received Hepatitis B virus (HBV) antiviral therapy for at least 4 weeks and have undetectable HBV viral load prior to randomization * Participants with history of Hepatitis C virus (HCV) infection are eli…
Nemtabrutinib tablets administered orally QD.