- Machine Shop & Tool Repair Service, Grantville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Grantville
- Malls & Shopping Centers, Grantville
- Management Consultants & Services, Grantville
- Manufacturing, Grantville
- Manufacturing Products, Grantville
- Martial Arts & Self Defense Schools, Grantville
- Masonry Materials & Supplies, Grantville
- Merchandise Sales Events, Grantville
- Metal Repair Service & Blacksmith, Grantville - Iron Works
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- Methodist Church, Grantville
- Miscellaneous Agriculture, Grantville
- Miscellaneous Government, Grantville
- Modular & Mobile Homes For Sale, Grantville - Manufactured Homes Sale & Service
- Money Transfer Service, Grantville
- Motor Vehicle, Grantville
- Motor Vehicle Rental & Leasing, Grantville
- Motorcycle Parts, Accessories & Dealers, Grantville
- Moving Truck Rental , Grantville
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