| Abbreviation | Definition |
|---|---|
| LW | Leisureworld Senior Care Corporation |
| LYD | Lydian International Limited |
| MAA | MagIndustries Corp. |
| MAA | MagIndustries Corporation |
| MAG | MAG Silver Corporation |
| MAI | Minera Andes, Inc. |
| MAI | Minera Andes, Incorporated |
| MAK | Minemakers Limited |
| MAL | Magellan Aerospace Corporation |
| MAW | Mawson Resources Limited |
| MB | MEGA Brands Inc. |
| MB | MEGA Brands Incorporated |
| MBA | CIBT Education Group Inc. |
| MBA | CIBT Education Group Incorporated |
| MBB | Manulife Brompton Advantaged Bond Fund |
| MBC | MBAC Fertilizer Corporation |
| MBN | Middlefield Bancorp Limited |
| MBT | Manitoba Telecom Services, Inc. |
| MBX | Microbix Biosystems Inc. |
| MBX | Microbix Biosystems Incorporated |