XENOPORT INC

CUSIP: 98411C100 Class: CMN

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

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

Q1 2016
Shares 10,182 Value ($000) $46 Avg Close — Range —
Q4 2015
Shares 1,882 Value ($000) $10 Avg Close — Range —
Q3 2015
Shares 3,418 Value ($000) $12 Avg Close — Range —
Q2 2015
Shares 3,254 Value ($000) $20 Avg Close — Range —
Q1 2015
Shares 1,954 Value ($000) $14 Avg Close — Range —
Q4 2014
Shares 9,554 Value ($000) $84 Avg Close — Range —
Q3 2014
Shares 8,254 Value ($000) $44 Avg Close — Range —
Q2 2014
Shares 31,854 Value ($000) $154 Avg Close — Range —
Q3 2013
Shares 2,612 Value ($000) $15 Avg Close — Range —
Q2 2013
Shares 2,298 Value ($000) $11 Avg Close — Range —