| Adobe Canada | Ontario |
| Adora Graphics | Ontario |
| ADP Canada Co. | Ontario |
| AdParlor | Ontario |
| AdPlus Media, Inc. | |
| Adputer, Inc. | Ontario |
| Adrénaline Solutions | Quebec |
| ADRM Technology Consulting Group Corporation | Ontario |
| Adroit Technologies | British Columbia |
| Adromedia Technologies | Quebec |
| Adsolutions Marketing, Inc. | British Columbia |
| Adster Creative | Alberta |
| Adstra Systems, Inc. | Ontario |
| Adtailor, Inc. | |
| ADTEL, Inc. | Alberta |
| Advameric | Ontario |
| Advanca | Ontario |
| Advance Business Systems | Ontario |
| Advance Graphics | Ontario |
| Advance Integrated Management System Solutions, Inc. | British Columbia |
| Advance Marketing Group | British Columbia |
| Advance Quality Electronics | Manitoba |
| Advance Web Solutions | Alberta |
| Advanced Alternative Investment Systems Ltd | |
| Advanced Analytics and Research Lab | |
| Advanced AV Design | Ontario |
| Advanced Chemistry Development, Inc. | Ontario |
| Advanced Chippewa Technologies, Inc. | Ontario |
| Advanced Computer Systems, Inc. | Ontario |
| Advanced Computer Technicians | Ontario |
| Advanced DatasyStems Ltd | Saskatchewan |
| Advanced Electrophoresis Solutions Ltd | |
| Advanced ERP Solutions | Ontario |
| Advanced Intelligent Systems, Inc. | |
| Advanced Internet Services | Ontario |
| Advanced IT Solutions | Ontario |
| Advanced Mission Critical Services, Inc. | Ontario |
| Advanced Motion & Controls Ltd | Ontario |
| Advanced Programming Services | Ontario |
| Advanced Repair Technologies, Inc. | British Columbia |
| Advanced Research & Scientific Innovations | |
| Advanced Systems | Alberta |
| Advanced Systems Management Group | Ontario |
| Advanced Systems Management Group Ltd | |
| Advanced Tech | New Brunswick |
| Advanced Telecommunications | Saskatchewan |
| Advanced Test and Automation, inc. | |
| Advanced Tracker Technologies | |
| Advanced Utility Systems | Ontario |
| Advanced Web Engineering | British Columbia |