ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

TUDOR INVESTMENT CORP ET AL's Holding History (CIK: 0000923093)

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

Q3 2015
Shares 37,185 Value ($000) $15 Avg Close — Range —
Q2 2015
Shares 37,185 Value ($000) $40 Avg Close — Range —
Q1 2015
Shares 50,861 Value ($000) $110 Avg Close — Range —
Q4 2014
Shares 45,603 Value ($000) $125 Avg Close — Range —
Q3 2014
Shares 51,420 Value ($000) $143 Avg Close — Range —
Q1 2014
Shares 22,009 Value ($000) $93 Avg Close — Range —
Q4 2013
Shares 202,460 Value ($000) $668 Avg Close — Range —
Q3 2013
Shares 51,600 Value ($000) $268 Avg Close — Range —
Q2 2013
Shares 17,800 Value ($000) $107 Avg Close — Range —