ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

Paloma Partners Management Co's Holding History (CIK: 0001103882)

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

Q3 2015
Shares 69,689 Value ($000) $27 Avg Close — Range —
Q2 2015
Shares 34,723 Value ($000) $37 Avg Close — Range —
Q1 2015
Shares 19,833 Value ($000) $43 Avg Close — Range —
Q4 2014
Shares 32,977 Value ($000) $91 Avg Close — Range —
Q3 2014
Shares 24,797 Value ($000) $69 Avg Close — Range —
Q2 2014
Shares 63,906 Value ($000) $270 Avg Close — Range —