TETRAPHASE PHARMACEUTICALS I

CUSIP: 88165N105 Class: COMMON STOCK

GREAT WEST LIFE ASSURANCE CO /CAN/'s Holding History (CIK: 0001046192)

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

Q1 2016
Shares 1,922 Value ($000) $9 Avg Close — Range —
Q4 2015
Shares 1,922 Value ($000) $19 Avg Close — Range —
Q3 2015
Shares 1,922 Value ($000) $14 Avg Close — Range —
Q2 2015
Shares 1,922 Value ($000) $91 Avg Close — Range —
Q1 2015
Shares 1,922 Value ($000) $70 Avg Close — Range —