| M.I.Nature | Alternative Health | facebook.com |
| MA BOUCHERIE | Butcher Shops | auboeufbourguignon.com |
| Ma Ka | ka | — |
| Ma Qu | qu | — |
| Ma Soeur & Moi Café | Cafes Terraces | masoeuretmoicafe.com |
| Maddison Electronique Inc | Antennas, Battery Chargers | maddison.ca |
| Madeleine Boyle Infirmière En Soins Podologiques | Health and Beauty | facebook.com |
| Madisons Sante Beaute & Spa | Beauty & Fitness, Hairdressers & Beauty Salons | madisonsplus.com |
| Maggie Semaan Award Winner Hairstylist | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Maintenance Agro-Alimentaire | Bakery Equipment, Bakery Supplies | equipements-boulangerie.com |
| Maintenance Industriel Laval | Shopping Mall | facebook.com |
| Maintenance Primavera Inc | Cleaning Services, Cleaning Service | leisureindustries.ca |
| Maison Corbeil | Furniture Stores | — |
| Maison Corbeil | Furniture Stores | — |
| Maison Cousin div de Canada Bread Frozen Bakery Ltée | Baked Goods Wholesalers | maison-cousin.com |
| Maison De Coiffure George | Beauty & Fitness, Hairdressers & Beauty Salons | beaute-zen-institut.com |
| Maison Meubles Corbeil | Furniture Stores | facebook.com |
| Maison Meubles Corbeil | Furniture Stores | maisoncorbeil.com |
| Maison Utile | Appliance Repair & Service | maisonutile.pro |
| Maitresse Angélie | Tout Arts et divertissement | maitresseangelie.com |
| Maja Designz | Home Improvement | facebook.com |
| Makeupbymyrlii | Health and Beauty | facebook.com |
| Manasse Maintenance | Cleaning Services, Cleaning Service | — |
| Manger Troiska | Furniture Stores | facebook.com |
| Mangogen Pharma | Life Sciences and Health Technologies (LSHT) | mangogen.com |
| Mani Tout Inc | Bookbinders | — |
| Maniel Coiffure | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Mannetta Industries Inc | Home Improvement | mannettaind.com |
| Mansard | Furniture Stores | facebook.com |
| Manulife Financial | Tout Entreprises et services | coverme.com |
| Marc Boucher ébéniste | Tout Commerces au détail, Tout Entreprises et services | facebook.com |
| Marc Jobin Architecte | Architects | facebook.com |
| Marcel Chapleau | Accountants | — |
| Marchand Entrepreneur Electricien Ltée | Electricians | marchandentrepreneur.com |
| Marché Belle-Rive Inc | Chinese Food Manufacturers & Distributors | — |
| Marché Gourmand Centropolis | Beverage Distributors & Bottlers | — |
| Marcil Matériaux et Rénovation | Clothes Lines | marcilcdr.com |
| Marie Josee Couture | Couture, COUTURE | — |
| Marie-Eve Bourgon | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Marie-Therese Couture | Couture, COUTURE | — |
| Mariette Clermont | Furniture Stores | marietteclermont.com |
| Mario Couture | Couture, COUTURE | — |
| Maroline Inc | Appliance Manufacturers & Wholesalers | facebook.com |
| Marose | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Marthe Jasmine Eyinga Ze | ze | — |
| MARTIN COUTURE | Couture, COUTURE | — |
| Massothérapie Laval | Physiotherapy | facebook.com |
| Massothérapie Nathalie | Health and Beauty | — |
| Massothérapie Roxane Graveline | Health and Beauty | massovie.com |
| Matthieu Couture D.O. - Ostéopathe | Health and Beauty | matthieucouture.ca |
