ARTHROCARE CORP

CUSIP: 043136100 Class: CMN

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

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

Q1 2014
Shares 2,441,259 Value ($000) $117,644 Avg Close — Range —
Q4 2013
Shares 3,175,487 Value ($000) $127,782 Avg Close — Range —
Q3 2013
Shares 2,935,077 Value ($000) $104,430 Avg Close — Range —
Q2 2013
Shares 2,916,136 Value ($000) $100,694 Avg Close — Range —