XOMA CORP DEL

CUSIP: 98419J107 Class: CMN

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

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

Q3 2016
Shares 159,099 Value ($000) $73 Avg Close — Range —
Q2 2016
Shares 53,913 Value ($000) $30 Avg Close — Range —
Q1 2016
Shares 61,613 Value ($000) $48 Avg Close — Range —
Q4 2015
Shares 66,959 Value ($000) $89 Avg Close — Range —
Q3 2015
Shares 165,211 Value ($000) $124 Avg Close — Range —
Q2 2015
Shares 256,914 Value ($000) $997 Avg Close — Range —
Q1 2015
Shares 81,445 Value ($000) $296 Avg Close — Range —
Q4 2014
Shares 77,951 Value ($000) $280 Avg Close — Range —
Q3 2014
Shares 188,776 Value ($000) $795 Avg Close — Range —
Q1 2014
Shares 193,164 Value ($000) $1,006 Avg Close — Range —
Q3 2013
Shares 164,863 Value ($000) $739 Avg Close — Range —
Q2 2013
Shares 45,057 Value ($000) $164 Avg Close — Range —