| Alchemy 24 | Montréal | Information Technologies (IT) |
| ALCiE Integrated Business Solutions | Montréal | Tout Informatique et internet |
| Alcoa Canada | Montréal | Aluminum |
| Alcoa Canada Cie | Montréal | Aluminum, Aluminum Fabricators |
| Alcoa innovation | Montréal | Clean Technologies |
| Aldea Solutions Inc | Montréal | Information Technologies (IT) |
| Aldeavision Inc. | Montréal | Tout Entreprises et services |
| ALDO | Saint-Bruno-De-Montarville | Boots |
| Aleco | Saint-Léonard | Building Contractors |
| Alerte Aménagement Paysager | Saint-Bruno | Landscaping |
Publicité (Desktop) Publicité (Mobile) |
| Alethia Biotherapeutics Inc. | Montréal | Life Sciences and Health Technologies (LSHT) |
| Alethia Biothérapeutiques Inc. | Montréal | Life Sciences and Health Technologies (LSHT) |
| Alexandra's Babysitting Services | Saint-Léonard | Babysitting Services |
| Alexandra's Nostalgic Memorabilia | Montréal | Antique Dealers |
| AlexSam - Pro Inc | Montréal | Cleaning Services, Cleaning Service |
| Alfa Clinique Médicale | Saint-Constant | Medical Clinics |
| Alfa Ménage | Montréal | Cleaning Services, Cleaning Service |
| Alfohno Pizzaria | Montréal | Pizza & Pizzerias |
| Algo Design | Laval | Information Technologies (IT) |
| Algolux | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Algorithme Pharma Inc. - Une Compagnie d'Altasciences | Laval | Life Sciences and Health Technologies (LSHT) |
| Alice and smith | Montréal | Information Technologies (IT) |
| Aligo | Montréal | Information Technologies (IT) |
| Aliment Congelés Alasko Inc. | Saint-Léonard | Tout Entreprises et services |
| Aliment Select Int | Saint-Léonard | Beverage Distributors & Bottlers |
| Alimentation O’Crock | Saint-Jean-De-Matha | Tout Commerces au détail |
| Aliments Ange-Gardien | Saint-Jean-Sur-Richelieu | Tout Entreprises et services |
| Aliments Conagra Canada Inc. | Boisbriand | Agri-food |
| Aliments Dole Canada | Laval | Agri-food |
| Aliments Fontaine Santé Inc. | Montréal | Agri-food |
Publicité (Desktop) Publicité (Mobile) |
| Aliments Horium Inc. | Montréal | Agri-food |
| Aliments KOYO Inc. | Montréal | Tout Entreprises et services |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
| Aliments Parmalat Inc. (Les) | Momtréal | Agri-food |
| Aliments Roma Ltée (Les) | Montréal | Agri-food |
| Aliments Ronzoni du Canada (Les) | Montréal | Agri-food |
| Alina4432 | Montréal | Ceramic Tile Installers & Contractors |
| Aljamila Coiffure | Saint-Léonard | Beauty & Fitness, Hairdressers & Beauty Salons |
| All Net | Montréal | Cleaning Services, Cleaning Service |
| All Set Consulting | Saint-Pierre | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| All You Need | Montréal | Arts & Crafts Stores |
| Allanté Limousines | Saint-Léonard | Chauffeur Services |
| Allard Technologies Inc. | Lasalle | Tout Entreprises et services |
| Allbudget Moving & Storage-Canada | Montréal | Moving Companies |
| Allbuy | Cote Saint-Luc | Barter, Trades & Exchanges |
| Allen Entreprise | Montréal | Cleaning Services, Cleaning Service |
| Allen Électrique Inc | Saint-Sauveur | Electricians |
| Allez-Up | Pointe-Saint-Charles | Tout Commerces au détail |
| Allia Expertise Inc | Saint-Bruno | Bookkeeping Software & Accounting Systems |
| Alliance de la Fonction Publique du Canada | Montréal | Community Service & Charitable Organizations |
