ION GEOPHYSICAL CORP

CUSIP: 462044207 Class: COMMON STOCK

TWO SIGMA ADVISERS, LP's Holding History (CIK: 0001478735)

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

Q2 2020
Shares 33,113 Value ($000) $77 Avg Close — Range —
Q1 2020
Shares 52,213 Value ($000) $66 Avg Close — Range —
Q4 2019
Shares 46,613 Value ($000) $405 Avg Close — Range —
Q3 2019
Shares 52,026 Value ($000) $474 Avg Close — Range —
Q2 2019
Shares 50,526 Value ($000) $407 Avg Close — Range —
Q1 2019
Shares 50,526 Value ($000) $730 Avg Close — Range —
Q4 2018
Shares 50,526 Value ($000) $262 Avg Close — Range —
Q3 2018
Shares 62,012 Value ($000) $964 Avg Close — Range —
Q2 2018
Shares 56,791 Value ($000) $1,380 Avg Close — Range —
Q1 2018
Shares 19,078 Value ($000) $517 Avg Close — Range —