TETRAPHASE PHARMACEUTICALS I

CUSIP: 88165N105 Class: COMMON STOCK

Weiss Asset Management LP's Holding History (CIK: 0001357550)

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

Q1 2018
Shares 17,729 Value ($000) $54 Avg Close — Range —
Q4 2017
Shares 10,313 Value ($000) $65 Avg Close — Range —