| Abbreviation | Definition |
|---|---|
| MRM | Mermaid Marine Australia Ltd |
| MRN | Macquarie Radio Network Ltd |
| MRP | Macphersons Reward Gold Limited |
| MRQ | Mrg Metals Limited |
| MRQO | Mrg Metals Limited |
| MRR | Minrex Resources Nl |
| MRY | Monteray Group Ltd |
| MSB | Mesoblast Ltd |
| MSBKMA | Mesoblast Limited |
| MSBKMP | Mesoblast Limited |
| MSBKOB | Mesoblast Limited |
| MSBKOC | Mesoblast Limited |
| MSBKOQ | Mesoblast Limited |
| MSBKRA | Mesoblast Limited |
| MSBKRB | Mesoblast Limited |
| MSBKRC | Mesoblast Limited |
| MSBKRD | Mesoblast Limited |
| MSBKRP | Mesoblast Limited |
| MSBKRR | Mesoblast Limited |
| MSBKRS | Mesoblast Limited |