ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO's Holding History (CIK: 0001007280)

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

Q1 2015
Shares 23,320 Value ($000) $51 Avg Close — Range —
Q4 2014
Shares 19,723 Value ($000) $54 Avg Close — Range —
Q3 2014
Shares 18,501 Value ($000) $52 Avg Close — Range —
Q2 2014
Shares 22,354 Value ($000) $94 Avg Close — Range —
Q1 2014
Shares 19,219 Value ($000) $81 Avg Close — Range —
Q4 2013
Shares 19,911 Value ($000) $66 Avg Close — Range —
Q3 2013
Shares 7,450 Value ($000) $39 Avg Close — Range —