MONROVIA, Calif.–(BUSINESS WIRE)–Xencor, Inc. (NASDAQ: XNCR), a clinical-stage biopharmaceutical company developing engineered antibodies and cytokines for the treatment of cancer and autoimmune diseases, today announced that clinical data from expansion cohorts in its Phase 1 study of plamotamab, a CD20 x CD3 bispecific antibody, in patients with relapsed or refractory…