| Aliments Fontaine Santé Inc. | Montréal | Agri-food |
| Aliments Horium Inc. | Montréal | Agri-food |
| Aliments KOYO Inc. | Montréal | Tout Entreprises et services |
| Aliments Parmalat Inc. (Les) | Momtréal | Agri-food |
| Aliments Roma Ltée (Les) | Montréal | Agri-food |
| Alina4432 | Montréal | Ceramic Tile Installers & Contractors |
| Aljamila Coiffure | Saint-Léonard | Beauty & Fitness, Hairdressers & Beauty Salons |
| All Set Consulting | Saint-Pierre | Information Technologies (IT) |
| All You Need | Montréal | Arts & Crafts Stores |
| Allanté Limousines | Saint-Léonard | Chauffeur Services |
Publicité (Desktop) Publicité (Mobile) |
| Allbuy | Cote Saint-Luc | Barter, Trades & Exchanges |
| 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 Nav | Montréal | Boat Equipment & Supplies, Marine Equipment & Supplies |
| Alliance Service d'Entretien Ménager | Saint-Paul-De-L'île-Aux-Noix | Cleaning Services, Cleaning Service |
| Allied Services D'Entretien D'Edifices (Québec) Inc | Montréal | Cleaning Services, Cleaning Service |
| Allo Pipo Le Clown | Saint-Léonard | Clowns |
| Allstate Assurance: Jonathan Viau | Saint-Léonard | Car Insurance |
| Alltech Distribution Inc | Saint-Michel | Tout Commerces au détail |
Publicité (Desktop) Publicité (Mobile) |
| Allyson Rhéaume Courtier Immobilier Résidentiel | Saint-Anselme | Real Estate Offices, Courtier immobilier |
| Allège et linteau De Montréal | Ville-Émard Et Côte-Saint-Paul | Tout Entreprises et services |
| Alongi | Lachine | Tout Commerces au détail, Tout Entreprises et services |
| Alpakine | Saint-Lambert | Clothing Stores |
| Alpen Secrets | Montréal | Tout Entreprises et services |
| Alpha Logistiques | Montréal | Tout Entreprises et services |
| Alpha Natura | Montréal | Physiotherapy |
| Alpha Toronto Series Inc | Saint-Léonard | Accountants |
| Alphacad Inc | Montréal | Computer Graphics Design & Animation |
| Alphacasting Inc. | Montréal | Aerospace, Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Alphi Apparel Group | Montréal | Tout Entreprises et services |
| Alsago Entrepreneurs | Montréal | Startup Ecosystem |
| Alset Cars | Montréal | Automobiles, car Dealers |
| Alt Art et Design | Montréal | Commercial Artists |
| Alt Art Et Design | Montréal | Artists |
| Altano Inc | Cote Saint-Luc | Home Improvement |
| Alternateur Démarreur Roussillon Enr | Sainte-Catherine | Alternators & Starters |
| Alternateurs Et Demarreurs Express Net | Saint-Hubert | Alternators & Starters |
| Alternateurs et Démarreurs | Saint-Amable | Alternators & Starters |
| Altitude Aerospace Inc | Montréal | Aircraft Maintenance, Service & Storage |
Publicité (Desktop) Publicité (Mobile) |
| Altitude Aerospace Inc | Montréal | Aircraft Maintenance, Service & Storage |
| Alto Design | Montréal | Clean Technologies, Tout Entreprises et services |
| Altopro Infographie Inc | Montréal | Computer Graphics Design & Animation |
| Alumalco | Montréal | Home Improvement |
| Alumicor Limited | Montréal | Aluminum, Aluminum Products, Architects |
| Alumina | Saint-Léonard | Aluminum |
| Aluminium D Gravel Inc | Saint-Hubert | Aluminum |
| Aluminium St-Hubert | Saint-Hubert | Aluminum |
| Aluminox Spec Inc | Saint-Hubert | Aluminum |
| Aluron Biopharma | Montréal | Life Sciences and Health Technologies (LSHT) |
