ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

PRELUDE CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001387508)

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

Q3 2015
Shares 9,500 Value ($000) $4 Avg Close — Range —
Q1 2015
Shares 15,500 Value ($000) $34 Avg Close — Range —
Q3 2014
Shares 58,710 Value ($000) $164 Avg Close — Range —
Q1 2014
Shares 9,300 Value ($000) $39 Avg Close — Range —