ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

SUMMIT SECURITIES GROUP LLC's Holding History (CIK: 0001531593)

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

Q1 2015
Shares 1,500 Value ($000) $3 Avg Close — Range —
Q3 2014
Shares 2,000 Value ($000) $6 Avg Close — Range —