ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

NORGES BANK's Holding History (CIK: 0001374170)

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

Q4 2015
Shares 1,983,679 Value ($000) $998 Avg Close — Range —
Q3 2015
Shares 1,983,679 Value ($000) $774 Avg Close — Range —
Q2 2015
Shares 2,190,362 Value ($000) $2,344 Avg Close — Range —
Q1 2015
Shares 2,190,362 Value ($000) $4,753 Avg Close — Range —
Q4 2014
Shares 2,089,592 Value ($000) $5,747 Avg Close — Range —
Q3 2014
Shares 2,089,592 Value ($000) $5,830 Avg Close — Range —
Q2 2014
Shares 1,739,115 Value ($000) $7,339 Avg Close — Range —
Q1 2014
Shares 1,739,115 Value ($000) $7,321 Avg Close — Range —
Q4 2013
Shares 1,739,115 Value ($000) $5,739 Avg Close — Range —
Q3 2013
Shares 1,739,115 Value ($000) $9,044 Avg Close — Range —
Q2 2013
Shares 1,739,115 Value ($000) $10,470 Avg Close — Range —
Q1 2013
Shares 1,739,115 Value ($000) $11,843 Avg Close — Range —
Q3 2012
Shares 1,739,115 Value ($000) $12,070 Avg Close — Range —
Q2 2012
Shares 1,885,528 Value ($000) $12,538 Avg Close — Range —