ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

MILLENNIUM MANAGEMENT LLC's Holding History (CIK: 0001273087)

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

Q4 2015
Shares 837,986 Value ($000) $422 Avg Close — Range —
Q3 2015
Shares 135,100 Value ($000) $53 Avg Close — Range —
Q2 2015
Shares 510,416 Value ($000) $546 Avg Close — Range —
Q1 2015
Shares 125,303 Value ($000) $272 Avg Close — Range —
Q4 2014
Shares 36,220 Value ($000) $100 Avg Close — Range —
Q3 2014
Shares 477,913 Value ($000) $1,333 Avg Close — Range —
Q2 2014
Shares 474,243 Value ($000) $2,001 Avg Close — Range —
Q1 2014
Shares 302,147 Value ($000) $1,272 Avg Close — Range —
Q4 2013
Shares 221,172 Value ($000) $730 Avg Close — Range —
Q3 2013
Shares 91,134 Value ($000) $474 Avg Close — Range —
Q2 2013
Shares 90,716 Value ($000) $546 Avg Close — Range —