ION GEOPHYSICAL CORP

CUSIP: 462044108 Class: COM

SHELTON CAPITAL MANAGEMENT's Holding History (CIK: 0001002784)

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

Q4 2015
Shares 11,605 Value ($000) $6 Avg Close — Range —
Q3 2015
Shares 11,605 Value ($000) $5 Avg Close — Range —
Q2 2015
Shares 11,605 Value ($000) $12 Avg Close — Range —
Q1 2015
Shares 11,605 Value ($000) $25 Avg Close — Range —
Q4 2014
Shares 11,605 Value ($000) $32 Avg Close — Range —
Q3 2014
Shares 11,605 Value ($000) $32 Avg Close — Range —
Q2 2014
Shares 11,605 Value ($000) $49 Avg Close — Range —
Q1 2014
Shares 11,605 Value ($000) $49 Avg Close — Range —
Q4 2013
Shares 11,605 Value ($000) $38 Avg Close — Range —
Q3 2013
Shares 11,605 Value ($000) $60 Avg Close — Range —
Q2 2013
Shares 11,605 Value ($000) $70 Avg Close — Range —