ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

HBK INVESTMENTS L P's Holding History (CIK: 0001011443)

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

Q1 2015
Shares 18,932 Value ($000) $41 Avg Close — Range —
Q4 2014
Shares 21,100 Value ($000) $58 Avg Close — Range —
Q3 2014
Shares 26,300 Value ($000) $73 Avg Close — Range —
Q2 2014
Shares 45,353 Value ($000) $191 Avg Close — Range —
Q1 2014
Shares 10,054 Value ($000) $42 Avg Close — Range —
Q2 2013
Shares 21,000 Value ($000) $126 Avg Close — Range —