| Symbol | Name | Country | Exchange |
|---|---|---|---|
| MIND | Mitcham Industries, Inc. | US | NASDAQ |
| MINDP | Mitcham Industries, Inc. - Series A 9.00% Series A Cumulative Preferred Stock | US | NASDAQ |
| CGGYY | CGG | US | OTC |
| CGPVF | CGG | US | OTC |
| GDGE | CGG SA | DE | F |
| VIRI | Viridien | FR | PA |
| 0RI9 | CGG SA | GB | LSE |