QUANTUM CORP

CUSIP: 747906AJ4 Class: NOTE 4.500%11/1

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

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

Q1 2015
Shares 4,500,000 Value ($000) $5,263,000 Avg Close — Range —
Q4 2014
Shares 4,500,000 Value ($000) $5,569,000 Avg Close — Range —
Q3 2014
Shares 5,000,000 Value ($000) $5,012,000 Avg Close — Range —
Q2 2014
Shares 5,000,000 Value ($000) $5,154,000 Avg Close — Range —
Q1 2014
Shares 5,000,000 Value ($000) $5,154,000 Avg Close — Range —
Q4 2013
Shares 5,000,000 Value ($000) $5,114,000 Avg Close — Range —