ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

LOS ANGELES CAPITAL MANAGEMENT LLC's Holding History (CIK: 0001177206)

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

Q4 2015
Shares 123,100 Value ($000) $62 Avg Close — Range —
Q3 2015
Shares 123,100 Value ($000) $48 Avg Close — Range —
Q2 2015
Shares 132,660 Value ($000) $142 Avg Close — Range —
Q1 2015
Shares 132,660 Value ($000) $288 Avg Close — Range —
Q4 2014
Shares 142,320 Value ($000) $391 Avg Close — Range —
Q3 2014
Shares 252,665 Value ($000) $705 Avg Close — Range —
Q2 2014
Shares 260,125 Value ($000) $1,098 Avg Close — Range —
Q1 2014
Shares 321,710 Value ($000) $1,354 Avg Close — Range —