PTC THERAPEUTICS INC

CUSIP: 69366JAB7 Class: CONV

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

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

Q4 2016
Shares 7,900,000 Value ($000) $4,582,000 Avg Close — Range —
Q3 2016
Shares 10,500,000 Value ($000) $5,561,000 Avg Close — Range —