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. The company provides Ultomiris to treat patients with atypical hemolytic uremic syndrome, generalized myasthenia gravis, neuromyelitis optica spectrum disororder; and Monjuvi for the treatment of patients with relapsed or refractory diffuse large B-cell lymphoma; and Sotrovimab that targets the SARS-CoV-2 virus. It develops XmAb819, a bispecific antibody to treat renal cell carcinoma; XmAb541, which is in Phase I for the treatment of ovarian cancer; XmAb808, a bispecific antibody that binds to the broadly expressed tumor antigen; Vudalimab, which is in Phase II clinical trial to treat metastatic castration-resistant prostate cancer; XmAb564, to treat autoimmune diseases; XmAb662, which is in Phase I clinical trial to treat patients with solid tumors; XmAb942, which is in Phase I clinical trial for patients with Crohn's disease and ulcerative colitis; and Plamotamab, a bispecific antibody, which is in Phase I clinical trial to treat lymphoma. Further, the company develops Xaluritamig, a bispecific T-cell engager that treats prostate cancer; Obexelimab, to treat patients with immunoglobulin G4-related disease; Teropavimab and zinlirvimab to treat human immunodeficiency virus; Tobevibart, a treatment for hepatitis Delta virus infection; Novartis, an antibody drug candidate that uses XmAb Fc technologies; Xpro1595 to treat patients with Alzheimer's disease and treatment-resistant depression; Zaltenibart to treat paroxysmal nocturnal hemoglobinuria and other alternative pathway disorders; ASP2138 to treat gastric, gastroesophageal junction, and pancreatic cancers; JNJ-9401 to treat prostate cancer; and JNJ-1493 to treat B-cell malignancies. The company was incorporated in 1997 and is headquartered in Pasadena, California.