RENAISSANCE TECHNOLOGIES LLC 13D and 13G filings for ION Geophysical Corporation:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2022-02-10 4:37 pm Sale | 2021-12-31 | 13G | ION Geophysical Corporation IOGPQ | RENAISSANCE TECHNOLOGIES LLC | 0 0.000% | -1,004,267 (Position Closed) | Filing |
| 2021-02-11 09:44 am Sale | 2020-12-31 | 13G | ION Geophysical Corporation IOGPQ | RENAISSANCE TECHNOLOGIES LLC | 1,004,267 6.700% | -42,323 (-4.04%) | Filing |
| 2020-02-13 10:48 am Purchase | 2019-12-31 | 13G | ION Geophysical Corporation IOGPQ | RENAISSANCE TECHNOLOGIES LLC | 1,046,590 7.360% | 20,067 (+1.95%) | Filing |