| ADT Security Services | Saint-Léonard | Aircraft Parts, Engines & Avionics |
| Ae Fournier | Sainte-Therese | ae |
| Aerial Technologies Inc. | Montréal | Life Sciences and Health Technologies (LSHT) |
| Aerogram The Aerial MEDIA Aérien | Saint-Hubert | Aerial Advertising |
| Aerospace Concepts of Canada Inc | Montréal | Aviation Consultants & Services |
| Aerospace Group | Montréal | Aircraft Dealers |
| Aerosystems International Inc. | Montréal | Aerospace, Tout Entreprises et services |
| Aerotek | Montréal | Business Centres |
| AETERNA FUNERAL COMPLEX | Montréal | Funeral Homes, Services |
| Affordance | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Affordance Studio | Montréal | Information Technologies (IT) |
| Affutage-Aiguisage Saint-Jean | Saint-Jean-Sur-Richelieu | Electricians |
| Afpec Inc. | Saint-Eustache | Tout Entreprises et services |
| African Beauty | Montréal | Beauty & Fitness, Hairdressers & Beauty Salons |
| AFSL pro | Montréal | Tout Enseignement et savoir |
| AG3 Sécurité | Pointe-Saint-Charles | Tout Entreprises et services |
| Agarathi Dance Academy | Montréal | Artists |
| AGAT Laboratoires | Montréal | Analytical & Testing Laboratories |
| AGAT Laboratories | Montréal | Analytical & Testing Laboratories |
| Agat Laboratories | Montréal | Analytical & Testing Laboratories |
Publicité (Desktop) Publicité (Mobile) |
| Agence Benedictus Inc | Saint-Lambert | Communications & Public Relations Consultants |
| Agence de mannequins Top Modèle et... | Saint-Michel | Tout Entreprises et services |
| Agence De Recouvrement Global | Saint-Léonard | Collection Agencies |
| Agence de voyages Contact Amérique | Saint-Sauveur | Tout Tourisme et hôtels |
| Agence digitale Interaction Healthcare inc. | Saint-Jacques | Life Sciences and Health Technologies (LSHT) |
| Agence Lumina | Saint-Lambert | Communications & Public Relations Consultants |
| Agence OZ Pubilicité Communication Web | Saint-Bruno | Advertising Agencies |
| AGFA | Kirkland | Information Technologies (IT) |
| Agiska Coopérative | Saint-Bruno | Tout Entreprises et services |
| Agrafbec Ltée | Saint-Bruno | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| AGROCAN INC. | Montréal | Food / Distributors, Food Wholesalers & Suppliers |
| Agrocentre St-Hyacinthe Inc. | Saint-Hyacinthe | Tout Entreprises et services |
| Agroplus | Montréal | Chemicals |
| Agropur | Saint-Hubert | Cheese |
| Agropur Coopérative | Montréal | Agri-food |
| Agropur Division Fromages et Produits Fonctionnels | Saint-Hubert | Cheese |
| Agropur Divison Fromages Fins | Saint-Hubert | Cheese |
| Agropur Fine Cheese Division | Saint-Hubert | Cheese |
| Agylis | Du Saint-Sacrement | Information Technologies (IT) |
| Ahearn & Soper Inc. | Montréal | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Aide a domicile-Isabelle | Sainte Julie | Cleaning Services, Cleaning Service |
| Ainés En Mouvement | Saint-Hubert | Associations |
| Air Canada Cargo | Montréal | Airlines |
| Air Création Canada Inc | Saint-Mathieu-De-Beloeil | Aircraft & Flight Schools |
| Air Fortier | Saint-Hubert | Air Conditioning Contractors |
| Air Fusion | Saint-Léonard | Air Conditioning Contractors |
| Air Inuit | Montréal | Airlines |
| Air Mecanic | Saint-Ambroise-De-Kildare | Aircraft Maintenance, Service & Storage |
| Air Métropolitain 2000 | Montréal | Air Conditioning Repair & Cleaning |
| Air Spécialiste Inc | Saint-Léonard | Air Conditioning Contractors |
