ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

Sterling Capital Management LLC's Holding History (CIK: 0001329883)

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

Q3 2015
Shares 551,130 Value ($000) $215 Avg Close — Range —
Q2 2015
Shares 577,030 Value ($000) $617 Avg Close — Range —