- Machinery, Supplies & Equipment - Business Production Related, Marshallville
- Management Consultants & Services, Marshallville
- Manufacturing, Marshallville
- Manufacturing Products, Marshallville
- Masonry Materials & Supplies, Marshallville
- Meat Market, Wholesale & Products, Marshallville
- Medical & Dental Management, Marshallville
- Medical Business Management Services, Marshallville
- Medical Management & Business Administration Service, Marshallville
- Metal Cleaning & Pickling, Marshallville
- Metal Plating & Polishing, Marshallville
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- Metal Repair Service & Blacksmith, Marshallville - Iron Works
- Methodist Church, Marshallville
- Mineral Wool Manufacturers, Marshallville
- Mini & Self Storage, Marshallville
- Miscellaneous Government, Marshallville
- Miscellaneous Professional, Marshallville
- Molds, Marshallville
- Motor Vehicle, Marshallville
- Motorcycle & Motor Scooters Dealers, Repair & Service, Marshallville
- Motorcycle Repair & Service, Marshallville
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