- Machine Shop, Wynne
- Machine Shop & Tool Repair Service, Wynne
- Machinery, Supplies & Equipment - Business Production Related, Wynne
- Machinery, Supplies & Equipment - Construction & Contractor Related, Wynne
- Management Consultants & Services, Wynne
- Manufacturing, Wynne
- Marriage & Family Counselors, Wynne
- Masonry Materials & Supplies, Wynne
- Medical Alert Systems, Wynne - Medical Alarms - PERS
- Medical Supplies & Equipment, Wynne
- Mental Health Clinics, Wynne - Treatment Centers
- Merle Norman Cosmetics, Wynne
- Methodist Church, Wynne
- Mexican Restaurants, Wynne
- Minerals, Wynne
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- Miscellaneous Business Credit Institutions & Services, Wynne
- Miscellaneous Agriculture, Wynne
- Miscellaneous Government, Wynne
- Miscellaneous Personal Services, Wynne
- Miscellaneous Photographers, Wynne
- Miscellaneous Professional, Wynne
- Mission Churches, Wynne
- Mortgage Bankers & Correspondents, Wynne
- Mortgage Companies, Wynne
- Mosquito Control, Wynne
- Motor Vehicle, Wynne
- Motor Vehicle Rental & Leasing, Wynne
- Movie Theaters, Wynne
- Moving Truck Rental , Wynne
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