B |
2020-02-13 10:48:05.0 |
ION GEOPHYSICAL CORP |
IO |
RENAISSANCE TECHNOLOGIES LLC |
7.36% |
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B |
2019-02-12 16:18:00.0 |
ION GEOPHYSICAL CORP |
IO |
RENAISSANCE TECHNOLOGIES LLC |
7.32% |
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S |
2014-03-11 17:25:33.0 |
ION GEOPHYSICAL CORP |
IO |
VILLERE ST DENIS J & CO LLC |
2.14% |
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