TETRAPHASE PHARMACEUTICALS I

CUSIP: 88165N105 Class: COMMON STOCK

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

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

Q2 2015
Shares 40,000 Value ($000) $1,898,000 Avg Close — Range —
Q1 2015
Shares 34,300 Value ($000) $1,257,000 Avg Close — Range —
Q2 2013
Shares 31,000 Value ($000) $218,000 Avg Close — Range —