ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

STONERIDGE INVESTMENT PARTNERS LLC's Holding History (CIK: 0001108831)

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

Q3 2013
Shares 32,032 Value ($000) $167 Avg Close — Range —
Q2 2013
Shares 25,532 Value ($000) $154 Avg Close — Range —