| Abbreviation | Definition |
|---|---|
| MAS | Mesa Minerals Limited |
| MAT | Matine Ltd t/over |
| MAU | Magnetic Resources NL |
| MAUCA | Magnetic Resources Nl |
| MBD | Marbletrend Group Ltd |
| MBD | Marbletrend Group, LTD. |
| MBE | Mobile Embrace Limited |
| MBK | Metal Bank Limited |
| MBLHB | MBLHB |
| MBN | Mirabela Nickel Ltd |
| MBO | Mobilarm Limited |
| MBT | Mission Biofuels Ltd |
| MCC | Macarthur Coal, LTD. |
| MCE | Matrix Composites & Engineering Limited |
| MCH | Murchison Holdings Ltd |
| MCO | Mount Conqueror Minerals NL |
| MCP | McPhersons Ltd |
| MCR | Mincor Resources NL |
| MCX | Mariner Corporation Limited |
| MDA | Modena Resources Ltd |