Xencor, Inc., a clinical stage biopharmaceutical company, focuses on the discovery and development of engineered monoclonal antibody and cytokine therapeutics to treat patients with cancer and autoimmune diseases in the United states and internationally. The company's product candidates include Obexelimab, an immune inhibitor that has completed Phase 2 clinical trial for the treatment of IgG4-related disease and systemic lupus erythematosus, as well as in Phase 1b/2a clinical trial to treat moderate-to-severe rheumatoid arthritis; Plamotamab, a tumor-targeted antibody, which is in Phase 1 clinical trial to treat non-Hodgkin lymphoma; XmAb717, XmAb841, and XmAb104, a bispecific antibody that is in Phase 1 clinical trial to treat patients with selected advanced solid tumors; and Vibecotamab, which is in Phase 1 clinical trial for the treatment of acute myeloid leukemia and other CD123-expressing hematologic malignancies. It is also developing Tidutamab that is in Phase 1 clinical trial to treat neuroendocrine tumors and gastrointestinal stromal tumors; XmAb564 to treat Autoimmune diseases; XmAb819 for the treatment of renal cell carcinoma; and XmAb306/RO7310729, which is in Phase 1 clinical trial to treat solid tumors. In addition, the company provides Monjuvi for the treatment of adult patients with relapsed or refractory diffuse large B-cell lymphoma; Ultomiris to treat adult patients with paroxysmal nocturnal hemoglobinuria (PNH) and atypical hemolytic uremic syndrome; and AIMab7195 to reduce blood serum levels of IgE, which mediates allergic responses and allergic disease. It has a collaboration and license agreement with Genentech, MorphoSys AG, Nestlé S.A., Novartis AG, INmune Bio, Inc., Janssen Biotech, Inc., Astellas Pharma, Inc., Amgen Inc., Atreca, Inc., and The University of Texas MD Anderson Cancer Center. Xencor, Inc. was incorporated in 1997 and is headquartered in Monrovia, California.