ION GEOPHYSICAL CORP

CUSIP: 462044207 Class: COMMON STOCK

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

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

Q4 2016
Shares 21,730 Value ($000) $130 Avg Close — Range —
Q3 2016
Shares 34,041 Value ($000) $233 Avg Close — Range —
Q2 2016
Shares 31,041 Value ($000) $193 Avg Close — Range —
Q1 2016
Shares 36,571 Value ($000) $295 Avg Close — Range —