ION GEOPHYSICAL CORP

CUSIP: 462044207 Class: COMMON STOCK

Nationwide Fund Advisors's Holding History (CIK: 0001097218)

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

Q4 2016
Shares 3,369 Value ($000) $20 Avg Close — Range —
Q3 2016
Shares 3,369 Value ($000) $23 Avg Close — Range —
Q2 2016
Shares 4,569 Value ($000) $28 Avg Close — Range —
Q1 2016
Shares 7,247 Value ($000) $59 Avg Close — Range —