ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

Parametrica Management Ltd's Holding History (CIK: 0001535110)

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

Q4 2013
Shares 38,546 Value ($000) $127 Avg Close — Range —
Q3 2013
Shares 23,896 Value ($000) $124 Avg Close — Range —
Q2 2013
Shares 10,351 Value ($000) $62 Avg Close — Range —