ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY's Holding History (CIK: 0000714142)

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

Q3 2015
Shares 55,300 Value ($000) $22 Avg Close — Range —
Q2 2015
Shares 55,300 Value ($000) $59 Avg Close — Range —
Q1 2015
Shares 55,300 Value ($000) $120 Avg Close — Range —
Q4 2014
Shares 55,300 Value ($000) $152 Avg Close — Range —
Q3 2014
Shares 55,300 Value ($000) $154 Avg Close — Range —
Q2 2014
Shares 55,300 Value ($000) $233 Avg Close — Range —
Q1 2014
Shares 55,300 Value ($000) $233 Avg Close — Range —
Q4 2013
Shares 55,300 Value ($000) $182 Avg Close — Range —
Q3 2013
Shares 55,300 Value ($000) $288 Avg Close — Range —
Q2 2013
Shares 144,190 Value ($000) $868 Avg Close — Range —