ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

D. E. Shaw & Co., Inc.'s Holding History (CIK: 0001009207)

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

Q3 2015
Shares 18,969 Value ($000) $7 Avg Close — Range —
Q2 2015
Shares 41,250 Value ($000) $44 Avg Close — Range —
Q1 2015
Shares 35,443 Value ($000) $77 Avg Close — Range —
Q4 2014
Shares 67,244 Value ($000) $185 Avg Close — Range —
Q3 2014
Shares 68,135 Value ($000) $190 Avg Close — Range —
Q2 2014
Shares 58,008 Value ($000) $245 Avg Close — Range —
Q1 2014
Shares 412,438 Value ($000) $1,736 Avg Close — Range —
Q4 2013
Shares 229,725 Value ($000) $758 Avg Close — Range —
Q3 2013
Shares 272,141 Value ($000) $1,415 Avg Close — Range —
Q2 2013
Shares 272,141 Value ($000) $1,639 Avg Close — Range —