| Me Douglas Yip Inc | Business Lawyers | douglasyip.com |
| Me Monique Fortier | Business Lawyers | — |
| Mecano-Pro | HVAC | — |
| Megani Inc | Massage Therapy | — |
| Menuiserie des Pins Ltée | Tout Entreprises et services | mdpins.qc.ca |
| Messier, Savard et Associés (MSA) | Tout Entreprises et services | messiersavard.com |
| Messina | Tout Bars et restaurants | messina.ca |
| Metix Inc | Shopping Mall | facebook.com |
| Metro Plus Drouin Longueuil | Not Profit, Grocery Stores | metro.ca |
| Meuble Loren Inc | Furniture Stores | meublesloren.com |
| Meuble Mtl | Beds | facebook.com |
| Michel Couture | Couture, COUTURE | — |
| Microsigns Systems | Shopping Mall | facebook.com |
| Midbec Ltée | Appliance Parts & Supplies, Tout Entreprises et services, Appliance Repair & Service | midbec.com |
| Mika Inamoto Shiatsu Therapy | Massage Therapy | facebook.com |
| Millen Millen Inc. | Business Centres | — |
| Mines D'Or Beauté. Rive Sud | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Mission Alpha International | Community Service & Charitable Organizations | — |
| MJM Conseillers en acoustique inc. | Tout Entreprises et services | mjm.qc.ca |
| Mk Illumination Est | Christmas Trees | mk-illumination.ca |
| Mlh | Home Improvement | facebook.com |
| MM Carrosserie | Auto Body Shop | — |
| MO Comptabilité | Bookkeeping Software & Accounting Systems | mocomptabilite.com |
| Mobelo Inc. | Cabinet Makers | mobelo.ca |
| Moghel Tandoori | Tout Bars et restaurants | mogheltandoori.com |
| Moment Évasion | Massage Therapy | facebook.com |
| Monique Martin Consultation | Dentists | facebook.com |
| Monsieur Pigeons Inc | Tout Commerces au détail | mpigeons.com |
| Montaza Restaurant | Breakfast Restaurants | — |
| Monteregie International Inc | Business Centres | facebook.com |
| Moov Solution | Bus & Coach Rental & Charter | facebook.com |
| Morelia A.M. Inc | Not Profit, Grocery Stores | facebook.com |
| Morin Daoud Avocats et Médiateurs | Bankruptcy Lawyers | facebook.com |
| Motair inc. | Tout Entreprises et services | motair.ca |
| Moulures Excellence Inc | Building Material Manufacturers & Wholesalers | mouluresexcellence.com |
| Mouvemen-T | Fitness Gyms | mouvemen-t.com |
| Mouvement Retrouvailles | Tout Communautés et société | mouvement-retrouvailles.qc.ca |
| Mr. Dandy Shoes | Boots | — |
| Mulco | Tout Entreprises et services | mulco.ca |
| Multisanté Inc | Physiotherapy | facebook.com |
| MultiTest | Analytical & Testing Laboratories | facebook.com |
| Musique Ranger | Audiovisual Equipment & Supplies | musiqueranger.ca |
| MyoForme | Fitness Gyms | — |
| Mécanique M-L | Auto Part Manufacturers & Wholesalers | facebook.com |
| Médiaweb | Tout Informatique et internet | mediaweb.ca |
| Médium Clairvoyante Hélène | Astrologers & Psychics | — |
| Mélanie Massothérapie | Health and Beauty | facebook.com |
| métal style bouvet | Tout Entreprises et services | bouvet.com |
| Métiers Et Traditions | Arts & Cultural Organizations & Centres | facebook.com |
| Métro-Sud Gaz Naturel Inc. | Tout Entreprises et services | metrosudgaz.com |
