| Symbol | Name | Country | Exchange |
|---|---|---|---|
| BLY | Boart Longyear Ltd. | AU | ASX |
| DDH | DDH 1 Drilling Pty Ltd | AU | ASX |
| PRN | Perenti Global Limited | AU | ASX |
| BLYFF | Boart Longyear Group Ltd | US | OTC |
| DDHLF | Ddh1 Ltd | US | OTC |
| OGD | Orbit Garant Drilling Inc | CA | TSX |
| OGD | Orbit Garant Drilling Inc. | CA | TO |