ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

Cambridge Investment Research Advisors, Inc.'s Holding History (CIK: 0001419186)

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

Q4 2014
Shares 14,490 Value ($000) $40 Avg Close — Range —
Q3 2014
Shares 16,980 Value ($000) $47 Avg Close — Range —
Q2 2014
Shares 15,155 Value ($000) $64 Avg Close — Range —
Q1 2014
Shares 29,270 Value ($000) $123 Avg Close — Range —
Q4 2013
Shares 12,280 Value ($000) $41 Avg Close — Range —
Q3 2013
Shares 11,880 Value ($000) $62 Avg Close — Range —
Q2 2013
Shares 11,880 Value ($000) $72 Avg Close — Range —