ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

SEGALL BRYANT & HAMILL, LLC's Holding History (CIK: 0001006378)

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

Q1 2014
Shares 11,880 Value ($000) $50 Avg Close — Range —
Q4 2013
Shares 11,780 Value ($000) $39 Avg Close — Range —
Q3 2013
Shares 11,780 Value ($000) $61 Avg Close — Range —