VOLCANO CORPORATION

CUSIP: 928645100 Class: CMN

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q4 2014
Shares 100,474 Value ($000) $1,796 Avg Close — Range —
Q3 2014
Shares 105,234 Value ($000) $1,120 Avg Close — Range —
Q2 2014
Shares 105,234 Value ($000) $1,853 Avg Close — Range —
Q1 2014
Shares 105,234 Value ($000) $2,074 Avg Close — Range —
Q4 2013
Shares 105,234 Value ($000) $2,299 Avg Close — Range —
Q3 2013
Shares 117,034 Value ($000) $2,799 Avg Close — Range —
Q2 2013
Shares 121,984 Value ($000) $2,212 Avg Close — Range —