ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

OPPENHEIMER & CO INC's Holding History (CIK: 0000822581)

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

Q3 2015
Shares 10,500 Value ($000) $4 Avg Close — Range —
Q2 2015
Shares 10,500 Value ($000) $11 Avg Close — Range —
Q1 2015
Shares 13,500 Value ($000) $29 Avg Close — Range —
Q4 2014
Shares 15,500 Value ($000) $43 Avg Close — Range —
Q3 2014
Shares 17,500 Value ($000) $49 Avg Close — Range —
Q2 2014
Shares 35,500 Value ($000) $150 Avg Close — Range —
Q1 2014
Shares 58,000 Value ($000) $244 Avg Close — Range —
Q4 2013
Shares 12,000 Value ($000) $40 Avg Close — Range —