| Association des collèges et universités de la francophonie canadienne | Ontario |
| Association des manufacturiers en électronique de Québec | Quebec |
| Association des redistributeurs d’électricité du Québec | Quebec |
| Association des Véhicules Électriques du Québec | |
| Association Edteq | Quebec |
| Association for Computer Technology in Alberta | |
| Association Management Solutions & Memlink, Inc. | British Columbia |
| Association of Atlantic Universities | Nova Scotia |
| Association of Canada Lands Surveyors | Ontario |
| Association of Canadian Ergonomists | Alberta |
| Association of Professional Computer Consultants | Ontario |
| Association pour le développement de la recherche et de l'innovation du Québec | Quebec |
| Association québécoise des informaticiennes et informaticiens indépendants | Quebec |
| Association québécoise des technologies | Quebec |
| Association québécoise des transports | Quebec |
| Association sur l'accès et la protection de l'information | Quebec |
| Assumption University | Ontario |
| Assured Software | British Columbia |
| AST Microwave | |
| Astatic Solutions | British Columbia |
| Astec Components Ltd | Ontario |
| ASTEC Digital | |
| AsterX | |
| Astley Gilbert | Ontario |
| Astra Campground Manager | Ontario |
| Astral Internet | Quebec |
| Astral Sécurité | Quebec |
| Astral Solutions Group | Ontario |
| AstraQom | Ontario |
| Astro-Tech System Solutions | Ontario |
| AstroCom Associates, Inc. | Ontario |
| Astrolabe Interactive | Quebec |
| Astropof, Inc. | Quebec |
| Astucemedia, Inc. | Quebec |
| Astus | Quebec |
| Astute Internet | British Columbia |
| Asurtec Solutions, Inc. | Ontario |
| Asyma | Alberta |
| Asynchron Systems, Inc. | Ontario |
| at Marketing | |
| AT Tech | |
| At The Helm | |
| Atakama Studio | Quebec |
| ATB Financial | |
| Atcom Systems, Inc. | Alberta |
| ATD Design & Manufacturing Services, Inc. | |
| Atek Canada | Quebec |
| Ateka | |
| Atelier d'intelligence appliquée | Quebec |
| Atelier V | Quebec |