| Amador Business Computers, Inc. | Alberta |
| Amanah | Ontario |
| Amanda Devries | Ontario |
| Amaron Consulting | Ontario |
| Amauta Marketing Internet | Quebec |
| Amazing Agency | Ontario |
| Amber Financial | British Columbia |
| AmberPOS | British Columbia |
| Ambidexter Management | British Columbia |
| Ambient Photonics | |
| Ambix | Ontario |
| Ambrose University | Alberta |
| Amdocs | Ontario |
| AMEC Corporation | |
| Ameego | Manitoba |
| Amenaza Technologies Ltd | Alberta |
| Ameripex Systems | Ontario |
| AmeriSys, Inc. | Quebec |
| AMG Consulting | Quebec |
| Amgen, Inc. | |
| Amgine Technologies (US), Inc. | |
| AMGmedia Works, Inc. | British Columbia |
| Amidship, Inc. | Ontario |
| Amigo Computing, Inc. | British Columbia |
| Amii | Alberta |
| Amilia Enterprises, Inc. | Quebec |
| AMINA | |
| Amintek Solutions, Inc. | Quebec |
| Amiral Agence Web | Quebec |
| Amisgest Technologies | Quebec |
| Amjay Software Solutions, Inc. | Ontario |
| AML Computer Support Ltd | Ontario |
| AmorChem | Quebec |
| Amortech, Inc. | Alberta |
| Amp Energy | |
| AMPD Energy | |
| ampEducator | Ontario |
| Ampere | |
| AmpereData, Inc. | Ontario |
| Amphenol Canada Corporation | Ontario |
| Amphenol CTI | Ontario |
| Ample Organics | Ontario |
| Ampli2de, Inc. | Ontario |
| Amplify Media | Nova Scotia |
| Amplitude | |
| AmpMe | Quebec |
| Amptek Technologies, Inc. | Ontario |
| AMR Group Ltd | Ontario |
| AMR Media | Ontario |
| Amr Zeidan | |