- Machine Shop & Tool Repair Service, Wainwright
- Machinery, Supplies & Equipment - Construction & Contractor Related, Wainwright
- Major Appliances, Wainwright - Household & Kitchen
- Management Consultants & Services, Wainwright
- Manufacturing, Wainwright
- Manufacturing & Industrial Consultants, Wainwright
- Masonry Materials & Supplies, Wainwright
- Massage Therapists & Professional, Wainwright
- Massage Therapy, Wainwright
- Meat Packers, Wainwright
- Men's & Boys Clothing & Accessories Stores, Wainwright
- Mens & Boys Belts & Suspenders, Wainwright
- Mining, Wainwright
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- Mirrors, Wainwright - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Agriculture, Wainwright
- Miscellaneous Manufacturing, Wainwright
- Miscellaneous Personal Services, Wainwright
- Miscellaneous Professional, Wainwright
- Modular Buildings, Wainwright - Modular Homes Buildings & Offices
- Money Transfer Service, Wainwright
- Motor Vehicle, Wainwright
- Motor Vehicle Rental & Leasing, Wainwright
- Motorcycle Parts, Accessories & Dealers, Wainwright
- Movie Theaters, Wainwright
- Moving Truck Rental , Wainwright
- Museums, Wainwright
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