| Symbol | Name | Country | Exchange |
|---|---|---|---|
| PHX | PHX Energy Services Corp. | CA | TSX |
| CAPD | Capital Drilling Limited | UK | LSE |
| MDI | Master Drilling Group Ltd | ZA | JSE |
| MUR | Murray & Roberts Holdings Ltd | ZA | JSE |
| PUCOBRE | Sociedad Punta del Cobre S.A | CL | SN |
| LDYA | Murray & Roberts Holdings Limited | DE | F |
| OGD | Orbit Garant Drilling Inc. | CA | TO |
| PD | Precision Drilling Corporation | CA | TO |