ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

CITADEL ADVISORS LLC's Holding History (CIK: 0001423053)

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

Q4 2015
Shares 176,104 Value ($000) $89 Avg Close — Range —
Q3 2015
Shares 259,864 Value ($000) $101 Avg Close — Range —
Q4 2014
Shares 44,430 Value ($000) $122 Avg Close — Range —
Q3 2014
Shares 329,016 Value ($000) $918 Avg Close — Range —
Q2 2014
Shares 294,975 Value ($000) $1,245 Avg Close — Range —
Q1 2014
Shares 433,647 Value ($000) $1,826 Avg Close — Range —
Q4 2013
Shares 233,975 Value ($000) $772 Avg Close — Range —
Q3 2013
Shares 62,509 Value ($000) $325 Avg Close — Range —
Q2 2013
Shares 4,589 Value ($000) $28 Avg Close — Range —