ION Geophysical Corporation Form SD: Specialized disclosure report (conflict minerals)
Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.
- 2021-05-28: Form SD; Description FORM SD; Document io20201207_sd.htm.
- 2020-05-29: Form SD; Description SD; Document a2019formsd.htm.
- 2019-05-31: Form SD; Description SD CY2018; Document a2018formsd.htm.
- 2018-05-31: Form SD; Description SD; Document a2017formsd.htm.
| Filed | Form | Period of report | Description | Document |
|---|---|---|---|---|
| 2021-05-28 | SD | FORM SD | io20201207_sd.htm | |
| 2020-05-29 | SD | SD | a2019formsd.htm | |
| 2019-05-31 | SD | SD CY2018 | a2018formsd.htm | |
| 2018-05-31 | SD | SD | a2017formsd.htm | |
| 2017-05-31 | SD | SD | a2016formsd.htm | |
| 2016-05-23 | SD | SD | a2015formsd.htm | |
| 2015-06-01 | SD | SD | a2014formsd.htm | |
| 2014-06-02 | SD | SD | formsd.htm |