ION GEOPHYSICAL CORP

CUSIP: 462044207 Class: COMMON STOCK

Engineers Gate Manager LP's Holding History (CIK: 0001620220)

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

Q4 2021
Shares 14,782 Value ($000) $13 Avg Close — Range —
Q2 2019
Shares 21,675 Value ($000) $174 Avg Close — Range —
Q1 2019
Shares 24,551 Value ($000) $355 Avg Close — Range —
Q4 2018
Shares 16,334 Value ($000) $85 Avg Close — Range —