NKX019, Intravenous Allogeneic Chimeric Antigen Receptor Natural Killer Cells (CAR NK), in Adults With B-cell Cancers

This is a dose-finding study of NKX019 and will be conducted in 2 parts: Part 1: dose finding utilizing a "3+3" enrollment schema and safety lead-in to confirm dose for NKX019 in combination with rituximab expansion cohorts (as applicable) Part 2: dose expansion to further evaluate safety and tolerability, cellular kinetics, pharmacodynamics and anti-tumor response in expansion cohorts of patients with large B cell lymphoma (LBCL), mantle cell lymphoma (MCL), indolent lymphoma (IL), Waldenström macroglobulinemia (WM), CLL/ small lymphocytic lymphoma (SLL), and B-ALL.