| Amigo Computing, Inc. | British Columbia |
| Amii | Alberta |
| Amilia Enterprises, Inc. | Quebec |
| AMINA | |
| Amintek Solutions, Inc. | Quebec |
| Amiral Agence Web | Quebec |
| Amiral Ventures | |
| Amisgest Technologies | Quebec |
| Amjay Software Solutions, Inc. | Ontario |
| AML Computer Support Ltd | Ontario |
| Ammerz | |
| AmorChem | Quebec |
| Amortech, Inc. | Alberta |
| Amp Energy | |
| AMP Technologies | |
| AMPD Energy | |
| ampEducator | Ontario |
| Ampere | |
| AmpereData, Inc. | Ontario |
| Amphenol Canada Corporation | Ontario |
| Amphenol CTI | Ontario |
| Amphy Technolabs | |
| Ample Organics | Ontario |
| Ampli2de, Inc. | Ontario |
| Amplify Media | Nova Scotia |
| Amplitude Ventures | |
| AmpMe | Quebec |
| Amptek Technologies, Inc. | Ontario |
| AMR Group Ltd | Ontario |
| AMR Media | Ontario |
| Amr Zeidan | |
| Amritech Computer Systems Ltd | British Columbia |
| AMS Computer Group | British Columbia |
| Amur Financial Group, Inc. | |
| Amyuni Technologies, Inc. | Quebec |
| AMZ One Step | |
| Amzak Health | |
| AN Design | Ontario |
| Anaergia | |
| Anahita | British Columbia |
| Analog Dog Creative Ltd | |
| Analogue Media Technologies, Inc. | |
| AnalysisWorks | |
| Analyst Technical Solutions | |
| Analystik, Inc. | Quebec |
| AnalystSoft | British Columbia |
| Analytico | Ontario |
| Analytics4Life | |
| Analyz | Quebec |
| Analyze Re | Nova Scotia |