- Machinery, Supplies & Equipment - Construction & Contractor Related, Hay River
- Mail Delivery Service, Hay River
- Mailing, Delivery & Courier Service, Hay River
- Malls & Shopping Centers, Hay River
- Management Consultants & Services, Hay River
- Manufacturing, Hay River
- Manufacturing Products, Hay River
- Masonry Materials & Supplies, Hay River
- Massage Therapists & Professional, Hay River
- Massage Therapy, Hay River
- Medical Supplies & Equipment, Hay River
- Membership Sports & Recreation Clubs, Hay River
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- Metal Tanks, Hay River
- Mining Equipment & Supplies, Hay River
- Miscellaneous Agriculture, Hay River
- Miscellaneous Business Services, Hay River
- Miscellaneous Government, Hay River
- Miscellaneous Professional, Hay River
- Motor Vehicle, Hay River
- Motor Vehicle Rental & Leasing, Hay River
- Movie Theaters, Hay River
- Moving Companies, Hay River
- Moving Truck Rental , Hay River
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