ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

PROFUND ADVISORS LLC's Holding History (CIK: 0001129919)

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

Q3 2015
Shares 18,495 Value ($000) $7 Avg Close — Range —
Q2 2015
Shares 25,125 Value ($000) $27 Avg Close — Range —
Q1 2015
Shares 20,890 Value ($000) $45 Avg Close — Range —
Q4 2014
Shares 19,150 Value ($000) $53 Avg Close — Range —
Q3 2014
Shares 17,903 Value ($000) $50 Avg Close — Range —
Q2 2014
Shares 29,599 Value ($000) $125 Avg Close — Range —
Q1 2014
Shares 31,737 Value ($000) $134 Avg Close — Range —
Q4 2013
Shares 60,097 Value ($000) $198 Avg Close — Range —
Q3 2013
Shares 57,532 Value ($000) $299 Avg Close — Range —
Q2 2013
Shares 28,212 Value ($000) $170 Avg Close — Range —