VOLCANO CORPORATION

CUSIP: 928645AB6 Class: CORPORATE OBLIG

OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AM's Holding History (CIK: 0001132716)

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

Q4 2014
Shares 26,095,000 Value ($000) $25,834,000 Avg Close — Range —
Q3 2014
Shares 28,750,000 Value ($000) $24,987,000 Avg Close — Range —
Q2 2014
Shares 10,000,000 Value ($000) $9,699,000 Avg Close — Range —
Q2 2013
Shares 15,000,000 Value ($000) $13,741,000 Avg Close — Range —