- Machine Shop & Tool Repair Service, Rimouski
- Machinery Movers & Erectors, Rimouski
- Machinery, Supplies & Equipment - Business Production Related, Rimouski
- Machinery, Supplies & Equipment - Business Supplies Related, Rimouski
- Machinery, Supplies & Equipment - Construction & Contractor Related, Rimouski
- Magazine & Newspaper Stands, Rimouski - Dealers & Distributors
- Mailing, Delivery & Courier Service, Rimouski
- Major Appliances, Rimouski - Household & Kitchen
- Malls & Shopping Centers, Rimouski
- Management Consultants & Services, Rimouski
- Manicurists & Pedicurists, Rimouski
- Manufacturing, Rimouski
- Manufacturing Equipment & Supplies, Rimouski
- Manufacturing Products, Rimouski
- Maple Sugar Manufacturers Supplies, Rimouski
- Maps & Globes, Rimouski
- Marinas & Marina Services, Rimouski
- Marine & Boat Products, Rimouski
- Marine Supplies & Equipment, Rimouski - Boat Supplies
- Masonry Contractors, Rimouski - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Rimouski
- Massage Therapy, Rimouski
- Mastectomy Apparel, Forms, Prostheses & Supplies, Rimouski
- Material Handling & Heavy Machinery & Equipment, Rimouski
- Meat Market, Wholesale & Products, Rimouski
- Mechanical Contractors, Rimouski - Install, Service & Repair
- Medical Groups & Clinics, Rimouski - Medical & Health Centers
- Medical Research Facilities, Rimouski - Research & Development Centers
- Medical Supplies & Equipment, Rimouski
- Membership Sports & Recreation Clubs, Rimouski
- Men's Clothing Stores, Rimouski - Clothes & Accessories
- Mental Health Specialists, Rimouski - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Rimouski
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- Metal Buildings, Rimouski - Kits, Homes, Steel Buildings, etc
- Metal Plating & Polishing, Rimouski
- Metal Polishing & Buffing, Rimouski
- Metal Repair Service & Blacksmith, Rimouski - Iron Works
- Milk Bars, Rimouski
- Mini & Self Storage, Rimouski
- Mini Golf Courses, Rimouski
- Mining, Rimouski
- Mirrors, Rimouski - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Business Product Repair, Rimouski
- Miscellaneous Household Item Repair, Rimouski
- Miscellaneous Agriculture, Rimouski
- Miscellaneous Business Services, Rimouski
- Miscellaneous Industry, Rimouski
- Miscellaneous Professional, Rimouski
- Modular & Mobile Homes For Sale, Rimouski - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Rimouski
- Mortgages & Loans, Rimouski
- Motion Picture Pre & Post Production Services, Rimouski
- Motor Vehicle, Rimouski
- Motor Vehicle Rental & Leasing, Rimouski
- Motorcycle Parts, Accessories & Dealers, Rimouski
- Movie Theaters, Rimouski
- Moving Companies, Rimouski
- Moving Truck Rental , Rimouski
- Multimedia Publishers, Rimouski - Multimedia Services & Systems
- Museums, Rimouski
- Music, Rimouski
- Music Entertainment, Rimouski
- Musical Instruments & Equipment Stores, Rimouski
- Musical Instruments Repair, Sales & Service, Rimouski
- Musical Recording Services, Rimouski
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