| Abacus RH | Tout Entreprises et services | academy.abacus-rh.com |
| ABAK | Tout Informatique et internet | hopem.com |
| Abat John | Electricians | — |
| Abat-Jour Idéal | Electricians | — |
| Abattage Rolec | Landscaping | — |
| ABB | Clean Technologies | abb.ca |
| Abb Canada | Automation Systems & Equipment | — |
| ABB Inc | Electricians | abb.ca |
| ABB Inc | Electricians | assetcorecovery.com |
| ABB Inc. | Tout Entreprises et services | new.abb.com |
| Abba | Clothing Manufacturers & Wholesalers | facebook.com |
| Abbas Sabet | Chartered Professional Accountants (CPA) | facebook.com |
| Abbott Canada (Abbott Nutrition & Santé Animale) | Life Sciences and Health Technologies (LSHT) | abbottnutrition.ca |
| Abbott Laboratories Limited | Tout Entreprises et services | abbott.ca:443 |
| Abbvie (Corporation) | Life Sciences and Health Technologies (LSHT) | abbvie.ca |
| AbbVie Corporation | Life Sciences and Health Technologies (LSHT) | accelink.com |
| AbbVie Inc. | Tout Entreprises et services | abbvie.ca |
| ABC Distribution | Tout Entreprises et services | abcdistribution.ca |
| ABC Drain | Plumbing | — |
| ABC Emballuxe Inc | Tout Entreprises et services, Bakery Supplies | abcemballuxe.com |
| ABC Emballuxe Inc | Bakery Supplies | — |
| ABC Inc | Plumbing | — |
| ABC Paysagement | Landscaping | — |
| ABC Sablage Richard | Flooring | facebook.com |
| ABC Sablage Richard | Flooring | — |
| ABC Service D'Arbre | Landscaping | facebook.com |
| Abdala Hasan | Artists | — |
| Abe & Mary's | Boutiques | facebook.com |
| Abe Cohen Plumbing & Heating Inc | Plumbing | abecohenplumbing.com |
| Abe Cohen Plumbing Heating Inc | Plumbing | — |
| Abeille Déco-Entrepreneurs | Painters | facebook.com |
| Abel Bwem CPA | Accounting Services | — |
| Abel Traiteur | Caterers | — |
| ABEONA SYSTEMS INC. | Life Sciences and Health Technologies (LSHT) | abeonasystems.ca |
| Abilis Solutions | Information Technologies (IT) | abilis.ca |
| Abitec Développements | Home Improvement | facebook.com |
| Able Chinese Acupuncture Clinic | Acupuncturists, Alternative Health | facebook.com |
| Abloy Canada Inc. | Tout Entreprises et services | abloy.com |
| Abnakaccbi | Airline Ticket Agencies | facebook.com |
| ABP | Tout Commerces au détail, Tout Entreprises et services | groupeabp.com |
| Abra Electronics Corp. | Tout Commerces au détail, Tout Entreprises et services | abra-electronics.com |
| Abra Electronique Corp | Antennas | abra-electronics.com |
| Abra-Kad-Abra Collection | Beads, Tout Commerces au détail, Beads & Pearls | abra-kad-abra.com |
| Abraham Renovation | Home Improvement | — |
| Abrahim Can | Cans | — |
| Abrasifs Hi-Tech Inc | Abrasives, Tout Entreprises et services | hi-tech.ca |
| Abrasifs Ubj Inc | Abrasives | hi-tech.ca |
| Abrite-Toit | Home Improvement | — |
| Abscoa Industries Inc. | Boat Dealers & Brokers | facebook.com |
| Absolument Montreal B&B | Bed & Breakfasts | — |
