| Blockstream | Montréal | Information Technologies (IT) |
| Blog des Archives de Montréal | Montréal | Tout Informations générales |
| Bloom Search Marketing | Montréal | Advertising Agencies |
| Bloomchat | Montréal | Information Technologies (IT) |
| Blue Bug Entertainment | Montréal | Information Technologies (IT) |
| Blue Lizard Games | Montréal | Information Technologies (IT) |
| Blue Meteorite | Richardson | Information Technologies (IT) |
| Blue Spirit Productions | Montréal | Information Technologies (IT) |
| Blue Water Québec Ltd | Montréal | Life Sciences and Health Technologies (LSHT) |
| Bluebird-9 | Montréal | Advertising Agencies |
Publicité (Desktop) Publicité (Mobile) |
| Bluelizard Games | Montréal | Information Technologies (IT) |
| BLVD | Montréal | Audiovisual Production Services, Information Technologies (IT) |
| BMC Software | Montréal | Information Technologies (IT) |
| Bobs Productions Inc. | Laval | Aerial Photographers |
| Boehringer Ingelheim | Montréal | Life Sciences and Health Technologies (LSHT) |
| Boehringer Ingelheim Canada | Laval | Life Sciences and Health Technologies (LSHT) |
| Boflex - Imperial | Longueuil | Life Sciences and Health Technologies (LSHT) |
| Boily Media | Montréal | Advertising Agencies |
| Boiron Canada | Saint Bruno-De Montarville | Life Sciences and Health Technologies (LSHT) |
| Boiron Canada inc. | René-Descartes | Life Sciences and Health Technologies (LSHT) |
Publicité (Desktop) Publicité (Mobile) |
| BOMBARDIER (GE Elano) | Mirabel | Aerospace |
| BOMBARDIER AEROSPACE Centre de finition Intérieure | Dorval | Aerospace |
| BOMBARDIER AEROSPACE Siège Social Aéro & usine 3 | Dorval | Aerospace |
| BOMBARDIER AEROSPACE Usine 1 | Montréal | Aerospace |
| BOMBARDIER AEROSPACE Usine de Mirabel | Mirabel | Aerospace |
| Bombardier Transport | Saint-Bruno-De-Montarville | Clean Technologies |
| Bonduelle Canada Inc. | Montréal | Agri-food |
| Bone structure | Laval | Clean Technologies |
| Bonsecours Inc | Montréal | Addiction Treatments & Information |
| bonsound | Montréal | Tout Arts et divertissement, Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Bonza Inc | Saint-Lambert | Advertising Agencies |
| BOOGIE STUDIO | Montréal | Information Technologies (IT) |
| Boscher Derhy Desmarais Godwin (BDG) | Montréal | Clean Technologies |
| Botler | Montréal | Information Technologies (IT) |
| Bottin haitiens de Montréal | Montréal | Tout Communautés et société |
| Boulangerie Andalos Inc | Montréal | Agri-food |
| Boulangerie Au pain doré | Montréal | Agri-food |
| Boulangerie Fairmount Bagel Inc. | Montréal | Agri-food |
| Boulangerie Gadoua Ltée. | La Prairie | Agri-food |
| Boulangerie La Fournee Ynewa | Montréal | Agri-food |
Publicité (Desktop) Publicité (Mobile) |
| Boulangerie Patisserie Adriatica Inc | Montréal | Bakeries |
| Boulangerie Première Moisson Inc. | Vaudreuil-Dorion | Agri-food |
| BOULANGERIES RENÉ INC | Baie-D'urfé | Agri-food |
| Boulangeries Weston Québec Ltée | Longueuil | Agri-food |
| Boulangeries Weston Québec Ltée | Est | Agri-food |
| Boutique 3e Âge | Saint-Lambert | Adaptive Clothing, Boutiques |
| Boutique J'Adore | Pointe-Claire | Bridal Shops |
| Boutique J'adore | Sainte-Geneviève | Bridal Shops |
| Boutique Northcoast | Niagara Falls | Adaptive Clothing |
| Bracco | Montréal | Life Sciences and Health Technologies (LSHT) |
