ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

PANAGORA ASSET MANAGEMENT INC's Holding History (CIK: 0000883677)

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

Q3 2015
Shares 1,468,312 Value ($000) $573 Avg Close — Range —
Q2 2015
Shares 1,452,339 Value ($000) $1,554 Avg Close — Range —
Q1 2015
Shares 1,478,697 Value ($000) $3,209 Avg Close — Range —
Q4 2014
Shares 919,365 Value ($000) $2,528 Avg Close — Range —
Q3 2014
Shares 830,189 Value ($000) $2,316 Avg Close — Range —
Q2 2014
Shares 826,305 Value ($000) $3,487 Avg Close — Range —
Q1 2014
Shares 477,643 Value ($000) $2,011 Avg Close — Range —
Q4 2013
Shares 430,473 Value ($000) $1,421 Avg Close — Range —
Q3 2013
Shares 97,740 Value ($000) $508 Avg Close — Range —