- Machine Shop & Tool Repair Service, Shawinigan
- Machinery, Supplies & Equipment - Business Production Related, Shawinigan
- Machinery, Supplies & Equipment - Business Supplies Related, Shawinigan
- Machinery, Supplies & Equipment - Construction & Contractor Related, Shawinigan
- Major Appliances, Shawinigan - Household & Kitchen
- Malls & Shopping Centers, Shawinigan
- Management Consultants & Services, Shawinigan
- Manicurists & Pedicurists, Shawinigan
- Manufacturing, Shawinigan
- Manufacturing Products, Shawinigan
- Map Publishers & Printers, Shawinigan
- Marine Supplies & Equipment, Shawinigan - Boat Supplies
- Marketing Consultants Professional Practices, Shawinigan
- Martial Arts & Self Defense Schools, Shawinigan
- Masonry Contractors, Shawinigan - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Shawinigan
- Massage Therapy, Shawinigan
- Maternity Clothes & Clothing Stores, Shawinigan - Maternity Dress, Gown, Swimwear, Underwear & More
- Mattress & Bedspring Manufacturers, Shawinigan
- Meals Ready To Eat Manufacturers, Shawinigan
- Meat Market, Wholesale & Products, Shawinigan
- Medical Supplies & Equipment, Shawinigan
- Men's Clothing Stores, Shawinigan - Clothes & Accessories
- Mental Health Specialists, Shawinigan - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Shawinigan
- Metal Coating & Allied Services, Shawinigan
- Metal Cutting Services, Shawinigan
- Metal Heat Treating, Shawinigan
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- Metal Plating & Polishing, Shawinigan
- Metal Polishing & Buffing, Shawinigan
- Metal Repair Service & Blacksmith, Shawinigan - Iron Works
- Metal Specialties, Shawinigan
- Mexican Restaurants, Shawinigan
- Mini & Self Storage, Shawinigan
- Mini Golf Courses, Shawinigan
- Mining Consultants, Shawinigan
- Miscellaneous Business Product Repair, Shawinigan
- Miscellaneous Agriculture, Shawinigan
- Miscellaneous Business Services, Shawinigan
- Miscellaneous Industry, Shawinigan
- Miscellaneous Professional, Shawinigan
- Monuments, Tombstones, Markers & Memorials, Shawinigan
- Mortgages & Loans, Shawinigan
- Motion Picture Pre & Post Production Services, Shawinigan
- Motor Vehicle, Shawinigan
- Motor Vehicle Rental & Leasing, Shawinigan
- Motorcycle Parts, Accessories & Dealers, Shawinigan
- Movie Theaters, Shawinigan
- Moving Companies, Shawinigan
- Moving Truck Rental , Shawinigan
- Multimedia Publishers, Shawinigan - Multimedia Services & Systems
- Music, Shawinigan
- Music Entertainment, Shawinigan
- Music Lessons, Shawinigan
- Music Lessons - Instrumental, Shawinigan
- Musical Instruments & Equipment Stores, Shawinigan
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