X0306 4 2020-03-23 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 2020-03-23 4 S 0 3199 34.4316 D 76401 I Geoffrey M Parker & Jill Gofen Parker Trustees of Geoffrey M Parker & Jill G Parker Revocable Trust Common Stock 2020-03-23 4 S 0 2801 35.3201 D 73600 I Geoffrey M Parker & Jill Gofen Parker Trustees of Geoffrey M Parker & Jill G Parker Revocable Trust Common Stock 2020-03-23 4 S 0 9181 36.7171 D 64419 I Geoffrey M Parker & Jill Gofen Parker Trustees of Geoffrey M Parker & Jill G Parker Revocable Trust Common Stock 2020-03-23 4 S 0 13959 37.3958 D 50460 I Geoffrey M Parker & Jill Gofen Parker Trustees of Geoffrey M Parker & Jill G Parker Revocable Trust Common Stock 2020-03-23 4 S 0 860 38.2128 D 49600 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 104189 D Reflects the weighted average sale price of the sales sold. The shares were sold in multiple trades at prices ranging from $33.92 to $34.83 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 sales sold. The shares were sold in multiple trades at prices ranging from $34.90 to $35.825 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 sales sold. The shares were sold in multiple trades at prices ranging from $36.21 to $36.99 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 sales sold. The shares were sold in multiple trades at prices ranging from $37.00 to $37.99 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 sales sold. The shares were sold in multiple trades at prices ranging from $38.00 to $38.82 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 2020-03-25