| Abbreviation | Definition |
|---|---|
| MNM | Mantle Mining Corporation Ltd |
| MNMOA | Mantle Mining Corporation Limited |
| MNW | Mint Wireless Ltd |
| MNY | Money3 Corporation Ltd |
| MNZ | Mnet Group Limited. |
| MOC | Mortgage Choice, Limited |
| MOD | MOD Resources, LTD. (formerly Medical Corporation Australasia, LTD.) |
| MOG | Moby Oil & Gas Ltd |
| MOL | Moly Mines Ltd |
| MOO | Monto Minerals, LTD. |
| MOT | Motopia Limited |
| MOTOA | Motopia Limited |
| MOU | Modun Resources Ltd |
| MOV | Moore Australasia (holdings) Limited |
| MOX | Monax Mining Ltd |
| MOY | Millennium Minerals Ltd |
| MOYOA | Millennium Minerals Limited |
| MOYOB | Millennium Minerals Limited |
| MOZ | Mozambi Coal Limited |
| MPD | Millepede International Ltd |