X0306 4 2016-08-24 0 0001326732 Xencor Inc XNCR 0001591306 Kuch John J C/O XENCOR, INC. 111 WEST LEMON AVENUE MONROVIA CA 91016 0 1 0 0 Vice President, Finance Common Stock 2016-08-24 4 M 0 14350 11.05 A 92078 D Common Stock 2016-08-24 4 S 0 16405 21.76 D 75673 D Common Stock 2016-08-24 4 S 0 8595 22.32 D 67078 D Stock Option (right to buy) 11.05 2016-08-24 4 M 0 14350 0.00 D 2024-02-20 Common Stock 14350 55650 D The weighted average sale price for the transaction reported was $21.76, and the range of prices were between $21.11 and $22.075. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided. The weighted average sale price for the transaction reported was $22.32, and the range of prices were between $22.25 and $22.35. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares purchased or sold at each separate price will be provided. 25% of the shares subject to the option shall vest on the one year anniversary of February 21, 2014 (the "Vesting Commencement Date"), and 1/48th of the shares shall vest monthly thereafter, such that the option shall be fully vested on the four year anniversary of the Vesting Commencement Date. /s/ John J. Kuch 2016-08-25