ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

BANK OF MONTREAL /CAN/'s Holding History (CIK: 0000927971)

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

Q3 2015
Shares 70,335 Value ($000) $27 Avg Close — Range —
Q2 2015
Shares 57,077 Value ($000) $62 Avg Close — Range —
Q1 2015
Shares 61,028 Value ($000) $132 Avg Close — Range —
Q4 2014
Shares 37,047 Value ($000) $102 Avg Close — Range —
Q3 2014
Shares 32,125 Value ($000) $91 Avg Close — Range —
Q2 2014
Shares 35,163 Value ($000) $149 Avg Close — Range —
Q1 2014
Shares 24,718 Value ($000) $104 Avg Close — Range —
Q4 2013
Shares 44,417 Value ($000) $147 Avg Close — Range —
Q3 2013
Shares 56,307 Value ($000) $292 Avg Close — Range —
Q2 2013
Shares 32,240 Value ($000) $194 Avg Close — Range —