ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

VIRGINIA RETIREMENT SYSTEMS ET AL's Holding History (CIK: 0001005354)

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

Q1 2014
Shares 45,100 Value ($000) $190 Avg Close — Range —
Q4 2013
Shares 111,200 Value ($000) $367 Avg Close — Range —
Q2 2013
Shares 14,800 Value ($000) $89 Avg Close — Range —