DOT HILL SYS CORP

CUSIP: 25848T109 Class: CMN

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

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

Q3 2015
Shares 1,725 Value ($000) $17 Avg Close — Range —
Q2 2015
Shares 7,890 Value ($000) $48 Avg Close — Range —
Q3 2014
Shares 9,484 Value ($000) $36 Avg Close — Range —
Q2 2014
Shares 5,112 Value ($000) $24 Avg Close — Range —
Q1 2014
Shares 4,369 Value ($000) $17 Avg Close — Range —