- Magicians & Hypnotist Entertainers, Clarkston
- Management Consultants & Services, Clarkston
- Manicurists & Pedicurists, Clarkston
- Manufacturing, Clarkston
- Manufacturing Products, Clarkston
- Meat Market, Wholesale & Products, Clarkston
- Medical & Dental Assistant Schools, Clarkston
- Medical Supplies & Equipment, Clarkston
- Membership Sports & Recreation Clubs, Clarkston
- Methodist Church, Clarkston
- Mineral Wool Manufacturers, Clarkston
- Miscellaneous Household Item Repair, Clarkston
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- Miscellaneous Government, Clarkston
- Miscellaneous Industry, Clarkston
- Miscellaneous Manufacturing, Clarkston
- Miscellaneous Professional, Clarkston
- Money Transfer Service, Clarkston
- Motion Picture Pre & Post Production Services, Clarkston
- Motor Vehicle, Clarkston
- Motor Vehicle Rental & Leasing, Clarkston
- Moving Truck Rental , Clarkston
- Muffler Shop & Exhaust Systems, Clarkston
- Music, Clarkston
- Musical Recording Services, Clarkston
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