ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

Swiss National Bank's Holding History (CIK: 0001582202)

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

Q3 2015
Shares 144,600 Value ($000) $56 Avg Close — Range —
Q2 2015
Shares 144,600 Value ($000) $155 Avg Close — Range —
Q1 2015
Shares 144,600 Value ($000) $314 Avg Close — Range —
Q4 2014
Shares 144,600 Value ($000) $398 Avg Close — Range —
Q3 2014
Shares 144,600 Value ($000) $403 Avg Close — Range —
Q2 2014
Shares 144,600 Value ($000) $610 Avg Close — Range —
Q1 2014
Shares 144,600 Value ($000) $609 Avg Close — Range —
Q4 2013
Shares 108,500 Value ($000) $358 Avg Close — Range —
Q3 2013
Shares 108,500 Value ($000) $564 Avg Close — Range —
Q2 2013
Shares 114,200 Value ($000) $687 Avg Close — Range —