TETRAPHASE PHARMACEUTICALS I

CUSIP: 88165N105 Class: COMMON STOCK

AMERICAN CENTURY COMPANIES INC's Holding History (CIK: 0000748054)

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

Q2 2015
Shares 17,849 Value ($000) $847 Avg Close — Range —
Q1 2015
Shares 13,476 Value ($000) $494 Avg Close — Range —