ACHILLION PHARMACEUTICALS IN

CUSIP: 00448Q201 Class: COM

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

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

Q1 2014
Shares 161,300 Value ($000) $531 Avg Close — Range —
Q4 2013
Shares 131,100 Value ($000) $435 Avg Close — Range —