ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

GLOBEFLEX CAPITAL L P's Holding History (CIK: 0000921531)

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

Q3 2014
Shares 478 Value ($000) $1 Avg Close — Range —
Q2 2014
Shares 173,295 Value ($000) $731 Avg Close — Range —
Q1 2014
Shares 173,460 Value ($000) $730 Avg Close — Range —