- Machine Tools , Ellisville
- Machinery, Supplies & Equipment - Business Supplies Related, Ellisville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Ellisville
- Mailbox Rental Services, Ellisville
- Mailing, Delivery & Courier Service, Ellisville
- Major Appliance Repair & Service, Ellisville
- Management Consultants & Services, Ellisville
- Manicurists & Pedicurists, Ellisville
- Manufacturers Agents & Representatives, Ellisville
- Manufacturers Representative, Ellisville - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Ellisville
- Marketing Consultants Professional Practices, Ellisville
- Martial Arts & Self Defense Schools, Ellisville
- Masonry Contractors, Ellisville - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Ellisville
- Massage Therapists & Professional, Ellisville
- Massage Therapy, Ellisville
- Meat Brokers, Ellisville
- Medical Groups & Clinics, Ellisville - Medical & Health Centers
- Medical Supplies & Equipment, Ellisville
- Mental Health Specialists, Ellisville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandising & Marketing Consultants, Ellisville
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- Metal Lockers, Ellisville
- Mexican Restaurants, Ellisville
- Microwave Ovens, Ellisville
- Mini & Self Storage, Ellisville
- Mining, Ellisville
- Miscellaneous Business Product Repair, Ellisville
- Miscellaneous Government, Ellisville
- Miscellaneous Manufacturing, Ellisville
- Miscellaneous Personal Services, Ellisville
- Miscellaneous Professional, Ellisville
- Moldings Materials, Ellisville
- Mortgage Bankers & Correspondents, Ellisville
- Mortgage Brokers, Ellisville
- Mortgage Companies, Ellisville
- Mortgage Feasibility Consultants, Ellisville
- Mortgages & Loans, Ellisville
- Motion Pictures Video Tape Duplication & Transfer Services, Ellisville
- Motor Vehicle, Ellisville
- Moving & Storage Supplies & Equipment, Ellisville
- Music, Ellisville
- Musical Instrument Rental, Ellisville - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Ellisville
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