X0306 4 2013-05-23 0 0001340652 ChemoCentryx, Inc. CCXI 0001319874 FECZKO JOSEPH M C/O CHEMOCENTRYX, INC. 850 MAUDE AVENUE MOUNTAIN VIEW CA 94043 1 0 0 0 Stock Option (right to buy) 13.94 2013-05-23 4 A 0 12500 A 2023-05-23 Common Stock 12500 12500 D The total number of shares of common stock subject to the option vest and become exercisable in 12 equal monthly installments over the first year following the date of grant, subject to the Reporting Person's continued service to the Company through each such vesting date. Not applicable. /s/ Susan M. Kanaya, as Attorney-in-Fact 2013-05-28