X0206 3 2019-09-05 0 0001326732 Xencor Inc XNCR 0001787397 Eckert Celia C/O XENCOR, INC. 111 WEST LEMON AVENUE MONROVIA CA 91016 0 1 0 0 VP, General Counsel and Secy Stock Option (Right to Buy) 35.58 2029-09-02 Common Stock 91292 D 1/4th of the shares vest one year after September 3, 2019 (the "Vesting Commencement Date"); the balance of the shares vest in a series of 36 successive equal monthly installments measured from the first anniversary of the Vesting Commencement Date, subject to the optionholder's Continuous Service (as defined in the 2013 Equity Incentive Plan) as of each such date. /s/ Celia Eckert 2019-09-06