UNITED THERAPEUTICS CORP DEL

CUSIP: 91307CAF9 Class: 1.00% 9/15/2016

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

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

Q4 2013
Shares 10,000,000 Value ($000) $23,703,000 Avg Close — Range —
Q3 2013
Shares 11,000,000 Value ($000) $18,701,000 Avg Close — Range —
Q2 2013
Shares 11,000,000 Value ($000) $16,006,000 Avg Close — Range —