| Alkalima Christian Store | Montréal | Not Profit, library |
| All Set Consulting | Saint-Pierre | Information Technologies (IT) |
| All You Need | Montréal | Arts & Crafts Stores |
| Allanté Limousines | Saint-Léonard | Chauffeur Services |
| 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 |
Publicité (Desktop) Publicité (Mobile) |
| 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 |
| 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 |
| Alpakine | Saint-Lambert | Clothing Stores |
| Alpen Secrets | Montréal | Tout Entreprises et services |
| Alpha Logistiques | Montréal | Tout Entreprises et services |
| Alpha Natura | Montréal | Physiotherapy |
Publicité (Desktop) Publicité (Mobile) |
| Alpha Toronto Series Inc | Saint-Léonard | Accountants |
| Alphacasting Inc. | Montréal | Aerospace, Tout Entreprises et services |
| Alphi Apparel Group | Montréal | Tout Entreprises et services |
| Alsago Entrepreneurs | Montréal | Startup Ecosystem |
| Alset Cars | Montréal | Automobiles, car Dealers |
| Altano Inc | Cote Saint-Luc | Home Improvement |
| AltaSciences Inc | Laval | Analytical & Testing Laboratories |
| Alternateur Démarreur Roussillon Enr | Sainte-Catherine | Alternators & Starters |
| Alternateurs Et Demarreurs Express Net | Saint-Hubert | Alternators & Starters |
| Alternateurs et Démarreurs | Saint-Amable | Alternators & Starters |
Publicité (Desktop) Publicité (Mobile) |
| Altitude Aerospace Inc | Montréal | Aircraft Maintenance, Service & Storage |
| Altitude Aerospace Inc | Montréal | Aircraft Maintenance, Service & Storage |
| 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) |
| Alyn Simard Audioprothésistes | Saint-Bruno | Audiologists |
Publicité (Desktop) Publicité (Mobile) |
| Amarille | Saint-Bruno | Tout Commerces au détail |
| Amaris Conseil Inc | Montréal | Information Technologies (IT) |
| Amaro Magasin St-Léonard | Saint-Léonard | Bulk & Bottled Water |
| Ambiance Luminaire | Saint-Léonard | Electricians |
| AMCS | Saint-Léonard | Cleaning Services, Cleaning Service |
| Amec Earth & Environmental | Des Sources | Asbestos Testing & Consultants |
| Ameli Artistry | Saint-Lambert | Beauty & Fitness, Hairdressers & Beauty Salons |
| Amerella du Canada Ltée | Montréal | Tout Entreprises et services |
| Ameublement Lida | Saint-Léonard | Tout Commerces au détail |
| Ameublement Lida Furniture Inc | Saint-Léonard | Beds |
