ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

BARCLAYS PLC's Holding History (CIK: 0000312069)

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

Q3 2015
Shares 737 Value ($000) $0 Avg Close — Range —
Q2 2015
Shares 19,103 Value ($000) $19 Avg Close — Range —
Q1 2015
Shares 17,159 Value ($000) $34 Avg Close — Range —
Q4 2014
Shares 10,494 Value ($000) $21 Avg Close — Range —
Q3 2014
Shares 23,878 Value ($000) $48 Avg Close — Range —
Q2 2014
Shares 27,140 Value ($000) $109 Avg Close — Range —
Q1 2014
Shares 136,893 Value ($000) $548 Avg Close — Range —
Q4 2013
Shares 70,169 Value ($000) $211 Avg Close — Range —
Q3 2013
Shares 99,871 Value ($000) $499 Avg Close — Range —
Q2 2013
Shares 162,202 Value ($000) $977 Avg Close — Range —