| Symbol | Name | Country | Exchange |
|---|---|---|---|
| BLY | Boart Longyear Ltd. | AU | ASX |
| MCE | Matrix Composites & Engineering Limited | AU | ASX |
| ATONY | Anton Oilfld Sv ADR | US | OTC |
| AUSDF | Ausdrill Ltd | US | OTC |
| SBOEF | Schoeller Bleckmann Oilfield Equipment Ag | US | OTC |
| SBOEY | Schoeller-Bleckmann Oilfield Equipment Ag [Austr | US | OTC |
| MCON | Mincon Group Plc | UK | LSE |
| ROCK | Rockfire Resources Plc | UK | LSE |