CHEMOCENTRYX INC

CUSIP: 16383L106 Class: COMMON STOCK

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q4 2015
Shares 1,102,332 Value ($000) $8,929 Avg Close — Range —
Q3 2015
Shares 1,082,957 Value ($000) $6,552 Avg Close — Range —
Q2 2015
Shares 1,124,397 Value ($000) $9,254 Avg Close — Range —
Q1 2015
Shares 1,272,098 Value ($000) $9,604 Avg Close — Range —
Q4 2014
Shares 1,276,833 Value ($000) $8,721 Avg Close — Range —
Q3 2014
Shares 1,366,793 Value ($000) $6,151 Avg Close — Range —
Q2 2014
Shares 1,400,993 Value ($000) $8,196 Avg Close — Range —
Q1 2014
Shares 1,402,303 Value ($000) $9,297 Avg Close — Range —
Q2 2013
Shares 21,700 Value ($000) $307 Avg Close — Range —