ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

NEUBERGER BERMAN GROUP LLC's Holding History (CIK: 0001465109)

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

Q4 2015
Shares 2,962,701 Value ($000) $1,491 Avg Close — Range —
Q3 2015
Shares 3,327,767 Value ($000) $1,298 Avg Close — Range —
Q2 2015
Shares 3,231,906 Value ($000) $3,458 Avg Close — Range —
Q1 2015
Shares 2,955,090 Value ($000) $6,413 Avg Close — Range —
Q4 2014
Shares 2,766,992 Value ($000) $7,609 Avg Close — Range —
Q3 2014
Shares 2,887,042 Value ($000) $8,054 Avg Close — Range —
Q2 2014
Shares 2,882,360 Value ($000) $12,164 Avg Close — Range —
Q1 2014
Shares 2,933,602 Value ($000) $12,350 Avg Close — Range —
Q4 2013
Shares 2,863,228 Value ($000) $9,449 Avg Close — Range —
Q3 2013
Shares 2,279,713 Value ($000) $11,855 Avg Close — Range —
Q2 2013
Shares 1,837,097 Value ($000) $11,059 Avg Close — Range —