VOLCANO CORPORATION

CUSIP: 928645100 Class: CMN

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

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

Q3 2013
Shares 564,920 Value ($000) $13,530 Avg Close — Range —
Q2 2013
Shares 1,760,248 Value ($000) $31,913 Avg Close — Range —