- Machine Shop, West Valley City
- Machine Shop & Tool Repair Service, West Valley City
- Machinery And Equipment Manufacturers, West Valley City
- Machinery, Supplies & Equipment - Business Production Related, West Valley City
- Machinery, Supplies & Equipment - Business Supplies Related, West Valley City
- Mailing, Delivery & Courier Service, West Valley City
- Management Consultants & Services, West Valley City
- Manicurists & Pedicurists, West Valley City
- Manufacturing, West Valley City
- Marriage & Family Counselors, West Valley City
- Masonry Materials & Supplies, West Valley City
- Mechanical Engineer, West Valley City - Mechanical Engineering Service
- Medical & Dental Management, West Valley City
- Medical Supplies & Equipment, West Valley City
- Mental Health Specialists, West Valley City - Psychologist, Psychiatrist, Psychotherapist, etc
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- Millwork Contractors, West Valley City
- Mini & Self Storage, West Valley City
- Miscellaneous Business Product Repair, West Valley City
- Miscellaneous Household Item Repair, West Valley City
- Miscellaneous Government, West Valley City
- Miscellaneous Personal Services, West Valley City
- Miscellaneous Professional, West Valley City
- Moldings Materials, West Valley City
- Mortgages & Loans, West Valley City
- Motor Vehicle, West Valley City
- Motor Vehicle Rental & Leasing, West Valley City
- Motorcycle Parts, Accessories & Dealers, West Valley City
- Moving & Storage Supplies & Equipment, West Valley City
- Moving Companies, West Valley City
- Moving Services - Labor & Material, West Valley City
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