ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

Ameritas Investment Partners, Inc.'s Holding History (CIK: 0001055980)

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

Q4 2015
Shares 11,881 Value ($000) $6 Avg Close — Range —
Q3 2015
Shares 11,881 Value ($000) $5 Avg Close — Range —
Q2 2015
Shares 11,881 Value ($000) $13 Avg Close — Range —
Q1 2015
Shares 11,881 Value ($000) $26 Avg Close — Range —
Q4 2014
Shares 11,881 Value ($000) $33 Avg Close — Range —
Q3 2014
Shares 11,881 Value ($000) $33 Avg Close — Range —
Q2 2014
Shares 11,881 Value ($000) $50 Avg Close — Range —
Q1 2014
Shares 11,881 Value ($000) $50 Avg Close — Range —
Q4 2013
Shares 11,881 Value ($000) $39 Avg Close — Range —
Q3 2013
Shares 11,881 Value ($000) $62 Avg Close — Range —