TETRAPHASE PHARMACEUTICALS I

CUSIP: 88165N105 Class: COMMON STOCK

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q3 2015
Shares 172,232 Value ($000) $1,285 Avg Close — Range —
Q2 2015
Shares 148,637 Value ($000) $7,051 Avg Close — Range —
Q1 2015
Shares 74,731 Value ($000) $2,738 Avg Close — Range —