ION GEOPHYSICAL CORP

CUSIP: 462044207 Class: COMMON STOCK

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q2 2016
Shares 233 Value ($000) $1 Avg Close — Range —
Q1 2016
Shares 233 Value ($000) $2 Avg Close — Range —