X0306 4 2021-03-04 0 0001340652 ChemoCentryx, Inc. CCXI 0001491874 Parker Geoffrey M. C/O CHEMOCENTRYX, INC. 850 MAUDE AVENUE MOUNTAIN VIEW CA 94043 1 0 0 0 Common Stock 2021-03-04 4 S 0 1910 60.1992 D 42690 I Geoffrey M Parker & Jill Gofen Parker Trustees of Geoffrey M Parker & Jill G Parker Revocable Trust Common Stock 2021-03-05 4 S 0 16670 56.7783 D 26020 I Geoffrey M Parker & Jill Gofen Parker Trustees of Geoffrey M Parker & Jill G Parker Revocable Trust Common Stock 2021-03-05 4 S 0 13330 55.887 D 12690 I Geoffrey M Parker & Jill Gofen Parker Trustees of Geoffrey M Parker & Jill G Parker Revocable Trust Common Stock 5000 I By Delaware Charter Guarantee & Trust Company, Trustee FBO Mr. Geoffrey Monroe Parker IRA Common Stock 111913 D Reflects the weighted average sale price of the shares sold. The shares were sold in multiple trades at prices ranging from $60.03 to $60.34 per share. The Reporting Person will provide to the SEC staff, the issuer or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price. Reflects the weighted average sale price of the shares sold. The shares were sold in multiple trades at prices ranging from $56.26 to $57.20 per share. The Reporting Person will provide to the SEC staff, the issuer or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price. Reflects the weighted average sale price of the shares sold. The shares were sold in multiple trades at prices ranging from $55.27 to $56.25 per share. The Reporting Person will provide to the SEC staff, the issuer or a security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price. /s/ Susan M. Kanaya, as Attorney-in-Fact 2021-03-08