- Machinery, Supplies & Equipment - Business Production Related, Ellisville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Ellisville
- Mailing, Delivery & Courier Service, Ellisville
- Manicurists & Pedicurists, Ellisville
- Manufacturing, Ellisville
- Manufacturing & Industrial Consultants, Ellisville
- Manufacturing Products, Ellisville
- Maps & Supplies, Ellisville
- Masonry Materials & Supplies, Ellisville
- Material Handling & Heavy Machinery & Equipment, Ellisville
- Mechanical Contractors, Ellisville - Install, Service & Repair
- Medical Research, Ellisville
- Medical Research & Development, Ellisville - Medical Information & Research
- Membership Sports & Recreation Clubs, Ellisville
- Men's Clothing Stores, Ellisville - Clothes & Accessories
- Mental Health Clinics, Ellisville - Treatment Centers
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- Mental Health Specialists, Ellisville - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Repair Service & Blacksmith, Ellisville - Iron Works
- Metaphysical Churches, Ellisville
- Methodist Church, Ellisville
- Mexican Restaurants, Ellisville
- Mining, Ellisville
- Mirrors, Ellisville - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Business Services, Ellisville
- Miscellaneous Government, Ellisville
- Miscellaneous Industry, Ellisville
- Miscellaneous Personal Services, Ellisville
- Miscellaneous Professional, Ellisville
- Motor Vehicle, Ellisville
- Motor Vehicle Rental & Leasing, Ellisville
- Moving Supplies & Equipment Rental, Ellisville
- Moving Truck Rental , Ellisville
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