TETRAPHASE PHARMACEUTICALS I

CUSIP: 88165N204 Class: COM NEW

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q2 2020
Shares 601 Value ($000) $2 Avg Close — Range —
Q1 2020
Shares 601 Value ($000) $1 Avg Close — Range —
Q4 2019
Shares 491 Value ($000) $1 Avg Close — Range —
Q3 2019
Shares 491 Value ($000) $3 Avg Close — Range —