ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

Public Sector Pension Investment Board's Holding History (CIK: 0001396318)

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

Q3 2015
Shares 141,367 Value ($000) $55 Avg Close — Range —
Q2 2015
Shares 199,167 Value ($000) $213 Avg Close — Range —
Q1 2015
Shares 241,667 Value ($000) $524 Avg Close — Range —
Q4 2014
Shares 241,449 Value ($000) $664 Avg Close — Range —
Q3 2014
Shares 241,449 Value ($000) $674 Avg Close — Range —
Q2 2014
Shares 280,249 Value ($000) $1,183 Avg Close — Range —
Q1 2014
Shares 257,658 Value ($000) $1,085 Avg Close — Range —
Q4 2013
Shares 298,258 Value ($000) $984 Avg Close — Range —
Q3 2013
Shares 291,758 Value ($000) $1,517 Avg Close — Range —
Q2 2013
Shares 227,858 Value ($000) $1,372 Avg Close — Range —