| Allsite IT | British Columbia |
| Allstar Tech | Saskatchewan |
| Allstream Business, Inc. | Ontario |
| Allumiqs | Nova Scotia |
| Allway Technologies, Inc. | British Columbia |
| Allwebco Design | Ontario |
| AllYouCanRead - Science & Technology | Ontario |
| Almaho, Inc. | |
| ALMEX Ltd | Ontario |
| Aloeroot Web Services | Ontario |
| Alora | |
| ALP Microsystèmes | Quebec |
| ALPHA | |
| Alpha Cancer Technologies, Inc. | Ontario |
| Alpha Dog Games | Nova Scotia |
| Alpha Intercom | Quebec |
| Alpha Networking | Ontario |
| Alpha Technologies Ltd | British Columbia |
| Alpha Technologies, Inc. | Manitoba |
| Alpha Telecom Services, Inc. | Ontario |
| Alpha TSi | Quebec |
| Alpha-9 Oncology, Inc. | |
| Alpha-9 Theranostics, Inc. | |
| ALPHA-EL, Inc. | |
| Alpha51, Inc. | Ontario |
| Alphabet | |
| AlphaBlock Technologies, Inc. | |
| Alphacâble | Quebec |
| Alphacasting, Inc. | |
| AlphaCognition | |
| AlphaKOR Group | Ontario |
| AlphaLayer, Inc. | |
| AlphaPay | |
| Alphasearch | Nova Scotia |
| AlphaTech Business and Technology, Inc. | Prince Edward Island |
| Alphatek | |
| Alphawave Semi | |
| AlphaZero | Quebec |
| Alphinat, Inc. | Quebec |
| Alpine Aerotech | British Columbia |
| Alpine Domains, Inc. | British Columbia |
| Alpine Technical Services & Sales | British Columbia |
| Alrux | Ontario |
| ALT | Ontario |
| ALT Consulting Ltd | Ontario |
| Alt Richmond, Inc. | Ontario |
| alt Telecom | Newfoundland and Labrador |
| Alt Venture Capital Corporation | |
| ALT-C.com | Quebec |
| Alt-Tech, Inc. | Alberta |