| Abbreviation | Definition |
|---|---|
| MGU | Magnum Gold NL |
| MGV | Musgrave Minerals Limited |
| MGX | Mount Gibson Iron Ltd |
| MGXKMB | Mount Gibson Iron Limited |
| MGXKOC | Mount Gibson Iron Limited |
| MGXKOP | Mount Gibson Iron Limited |
| MGY | Mercury Brands Ltd |
| MGZ | Medigard Ltd |
| MHC | Manhattan Corporation Limited |
| MHI | Merchant House International Ltd |
| MHM | Macquarie Harbour Mining Ltd |
| MHM | Macquarie Harbour Mining, LTD. |
| MHMO | Macquarie Harbour Mining Ltd |
| MII | MII |
| MIK | Mikoh Corporation Ltd |
| MIN | Mineral Resources Ltd |
| MINKMA | Mineral Resources Limited |
| MINKMP | Mineral Resources Limited |
| MINKOA | Mineral Resources Limited |
| MIO | Miclyn Express Offshore Limited |