ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM's Holding History (CIK: 0000938076)

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

Q4 2015
Shares 112,084 Value ($000) $56 Avg Close — Range —
Q3 2015
Shares 111,824 Value ($000) $44 Avg Close — Range —
Q2 2015
Shares 111,564 Value ($000) $119 Avg Close — Range —
Q1 2015
Shares 111,564 Value ($000) $242 Avg Close — Range —
Q4 2014
Shares 111,564 Value ($000) $307 Avg Close — Range —
Q3 2014
Shares 111,564 Value ($000) $311 Avg Close — Range —
Q2 2014
Shares 111,564 Value ($000) $471 Avg Close — Range —
Q1 2014
Shares 111,564 Value ($000) $470 Avg Close — Range —
Q4 2013
Shares 111,564 Value ($000) $368 Avg Close — Range —
Q3 2013
Shares 111,564 Value ($000) $580 Avg Close — Range —
Q2 2013
Shares 121,355 Value ($000) $731 Avg Close — Range —