ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

GREAT WEST LIFE ASSURANCE CO /CAN/'s Holding History (CIK: 0001046192)

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

Q3 2015
Shares 4,075 Value ($000) $2 Avg Close — Range —
Q2 2015
Shares 4,075 Value ($000) $4 Avg Close — Range —
Q1 2015
Shares 4,075 Value ($000) $9 Avg Close — Range —
Q4 2014
Shares 4,075 Value ($000) $11 Avg Close — Range —
Q3 2014
Shares 4,075 Value ($000) $11 Avg Close — Range —
Q2 2014
Shares 4,075 Value ($000) $17 Avg Close — Range —
Q1 2014
Shares 4,075 Value ($000) $17 Avg Close — Range —
Q4 2013
Shares 4,075 Value ($000) $13 Avg Close — Range —