ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

RENAISSANCE TECHNOLOGIES LLC's Holding History (CIK: 0001037389)

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

Q4 2015
Shares 2,612,500 Value ($000) $1,314 Avg Close — Range —
Q3 2015
Shares 2,526,400 Value ($000) $985 Avg Close — Range —
Q2 2015
Shares 2,460,489 Value ($000) $2,633 Avg Close — Range —
Q1 2015
Shares 1,257,400 Value ($000) $2,729 Avg Close — Range —
Q4 2014
Shares 655,800 Value ($000) $1,803 Avg Close — Range —
Q3 2014
Shares 344,675 Value ($000) $962 Avg Close — Range —
Q2 2014
Shares 224,637 Value ($000) $948 Avg Close — Range —
Q1 2014
Shares 984,257 Value ($000) $4,144 Avg Close — Range —
Q4 2013
Shares 1,091,000 Value ($000) $3,600 Avg Close — Range —
Q3 2013
Shares 80,900 Value ($000) $421 Avg Close — Range —
Q2 2013
Shares 159,810 Value ($000) $962 Avg Close — Range —