ION GEOPHYSICAL CORP

CUSIP: 462044207 Class: COMMON STOCK

OXFORD ASSET MANAGEMENT LLP's Holding History (CIK: 0001438284)

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

Q2 2018
Shares 56,030 Value ($000) $1,362 Avg Close — Range —
Q1 2018
Shares 128,766 Value ($000) $3,490 Avg Close — Range —
Q4 2017
Shares 153,044 Value ($000) $3,007 Avg Close — Range —
Q3 2017
Shares 42,286 Value ($000) $400 Avg Close — Range —
Q2 2017
Shares 28,265 Value ($000) $123 Avg Close — Range —
Q1 2017
Shares 49,379 Value ($000) $239 Avg Close — Range —
Q4 2016
Shares 88,911 Value ($000) $533 Avg Close — Range —
Q3 2016
Shares 71,238 Value ($000) $488 Avg Close — Range —
Q2 2016
Shares 112,733 Value ($000) $702 Avg Close — Range —
Q1 2016
Shares 38,508 Value ($000) $311 Avg Close — Range —