- Machinery, Supplies & Equipment - Construction & Contractor Related, Newport
- Mailing, Delivery & Courier Service, Newport
- Management Consultants & Services, Newport
- Manufacturers Agents & Representatives, Newport
- Manufacturers Representative, Newport - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Newport
- Marinas & Marina Services, Newport
- Marine Products And Services, Newport
- Marine Repair & Service Stations, Newport
- Marine Supplies & Equipment, Newport - Boat Supplies
- Marine Supplies & Equipment Repair, Newport - Boat Supplies & Equipment
- Marriage & Family Counselors, Newport
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- Masonry Materials & Supplies, Newport
- Medical Diagnostic Clinics, Newport - Clinical Labs & Centers
- Mini & Self Storage, Newport
- Miscellaneous Government, Newport
- Miscellaneous Industry, Newport
- Miscellaneous Manufacturing, Newport
- Mobile Home Parks & Communities , Newport
- Modular & Mobile Homes For Sale, Newport - Manufactured Homes Sale & Service
- Motor Vehicle, Newport
- Motor Vehicle Rental & Leasing, Newport
- Moving Supplies & Equipment Rental, Newport
- Moving Truck Rental , Newport
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