ION GEOPHYSICAL CORP

CUSIP: 462044207 Class: COMMON STOCK

VANGUARD GROUP INC's Holding History (CIK: 0000102909)

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

Q1 2022
Shares 1,009,992 Value ($000) $881 Avg Close — Range —
Q4 2021
Shares 910,310 Value ($000) $801 Avg Close — Range —
Q3 2021
Shares 885,730 Value ($000) $1,178 Avg Close — Range —
Q2 2021
Shares 846,529 Value ($000) $1,769 Avg Close — Range —
Q1 2021
Shares 469,040 Value ($000) $1,003 Avg Close — Range —
Q4 2020
Shares 454,240 Value ($000) $1,104 Avg Close — Range —
Q3 2020
Shares 454,296 Value ($000) $682 Avg Close — Range —
Q2 2020
Shares 475,270 Value ($000) $1,112 Avg Close — Range —
Q1 2020
Shares 488,161 Value ($000) $619 Avg Close — Range —
Q4 2019
Shares 488,161 Value ($000) $4,237 Avg Close — Range —
Q3 2019
Shares 428,712 Value ($000) $3,910 Avg Close — Range —
Q2 2019
Shares 496,465 Value ($000) $3,996 Avg Close — Range —
Q1 2019
Shares 487,760 Value ($000) $7,044 Avg Close — Range —
Q4 2018
Shares 282,979 Value ($000) $1,466 Avg Close — Range —
Q3 2018
Shares 526,320 Value ($000) $8,184 Avg Close — Range —
Q2 2018
Shares 487,542 Value ($000) $11,847 Avg Close — Range —
Q1 2018
Shares 421,496 Value ($000) $11,422 Avg Close — Range —
Q4 2017
Shares 392,547 Value ($000) $7,752 Avg Close — Range —
Q3 2017
Shares 231,422 Value ($000) $2,201 Avg Close — Range —
Q2 2017
Shares 290,417 Value ($000) $1,263 Avg Close — Range —
Q1 2017
Shares 360,088 Value ($000) $1,747 Avg Close — Range —
Q4 2016
Shares 435,060 Value ($000) $2,610 Avg Close — Range —
Q3 2016
Shares 417,326 Value ($000) $2,859 Avg Close — Range —
Q2 2016
Shares 405,982 Value ($000) $2,530 Avg Close — Range —
Q1 2016
Shares 423,353 Value ($000) $3,421 Avg Close — Range —