Xencor, Inc. ("Xencor") (NASDAQ:XNCR), a clinical-stage biopharmaceutical company developing engineered antibodies for the treatment of cancer and other serious diseases, today announced the closing of its previously announced underwritten public offering of 8,093,712 shares of its common stock at a price to the public of $18.00 per share, which includes the exercise in full by the underwriters of their option to purchase up to 1,458,600 additional shares of common stock, and pre-funded warrants to purchase up to an aggregate of 3,088,888 shares of common stock at a price to the public of $17.99 per pre-funded warrant. The pre-funded warrants are immediately exercisable and have an exercise