ION GEOPHYSICAL CORP

CUSIP: 462044207 Class: COMMON STOCK

ALPS ADVISORS INC's Holding History (CIK: 0001376113)

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

Q3 2018
Shares 26,907 Value ($000) $418 Avg Close — Range —
Q2 2018
Shares 20,524 Value ($000) $499 Avg Close — Range —