| Abbreviation | Definition |
|---|---|
| NRI | Nuvo Pharmaceuticals, Incorporated |
| NRI | Nuvo Research Inc. |
| NSI | Nova Scotia Power Inc. |
| NSI | Nova Scotia Power Incorporated (de-listed) |
| NSI | Nova Scotia Power Incorporated (de-listed) |
| NSU | Nevsun Resources Ltd. |
| NSU | Nevsun Resources, LTD. |
| NTA | Noventa, Limited |
| NTI | Northcore Technologies Inc. |
| NTI | Northcore Technologies Incorporated (de-listed) |
| NTI | Northcore Technologies Incorporated (de-listed) |
| NUS | Nautilus Minerals Inc. |
| NUS | Nautilus Minerals Incorporated |
| NVA | NuVista Energy Ltd. |
| NVA | NuVista Energy, LTD. |
| NWF | North West Company Fund |
| NWH | Northwest Healthcare Properties Real Estate Investment Trust |
| NWI | Nuinsco Resources Limited |
| NWX | Newport Exploration, LTD. |
| NXY | Nexen Inc. |