CHEMOCENTRYX INC

CUSIP: 16383L106 Class: COMMON STOCK

TOCQUEVILLE ASSET MANAGEMENT L.P.'s Holding History (CIK: 0000883961)

Note: Option positions (PUT/CALL) are excluded.

Q3 2014
Shares 50,000 Value ($000) $225 Avg Close — Range —
Q2 2014
Shares 50,000 Value ($000) $293 Avg Close — Range —
Q1 2014
Shares 80,500 Value ($000) $534 Avg Close — Range —
Q2 2013
Shares 17,100 Value ($000) $242 Avg Close — Range —