ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

Invesco Ltd.'s Holding History (CIK: 0000914208)

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

Q4 2015
Shares 28,426,585 Value ($000) $14,299 Avg Close — Range —
Q3 2015
Shares 31,804,811 Value ($000) $12,403 Avg Close — Range —
Q2 2015
Shares 32,018,024 Value ($000) $34,261 Avg Close — Range —
Q1 2015
Shares 32,006,561 Value ($000) $69,454 Avg Close — Range —
Q4 2014
Shares 31,797,788 Value ($000) $87,444 Avg Close — Range —
Q3 2014
Shares 31,652,664 Value ($000) $88,311 Avg Close — Range —
Q2 2014
Shares 32,544,946 Value ($000) $137,340 Avg Close — Range —
Q1 2014
Shares 32,588,760 Value ($000) $137,199 Avg Close — Range —
Q4 2013
Shares 31,667,181 Value ($000) $104,502 Avg Close — Range —
Q3 2013
Shares 20,885,615 Value ($000) $108,604 Avg Close — Range —
Q2 2013
Shares 18,623,838 Value ($000) $112,116 Avg Close — Range —