- Machine Shop, Lewisville
- Machine Shop & Tool Repair Service, Lewisville
- Machine Tool Repair & Rebuild, Lewisville
- Machinery, Supplies & Equipment - Business Production Related, Lewisville
- Machinery, Supplies & Equipment - Business Supplies Related, Lewisville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Lewisville
- Magazine Printing & Publishing, Lewisville
- Mailbox Rental Services, Lewisville
- Mailing List Service, Brokers & Compilers, Lewisville
- Mailing, Delivery & Courier Service, Lewisville
- Major Appliances, Lewisville - Household & Kitchen
- Malls & Shopping Centers, Lewisville
- Management Consultants & Services, Lewisville
- Management Training & Development, Lewisville
- Manicurists & Pedicurists, Lewisville
- Manifold Business Forms Manufacturers, Lewisville
- Manufacturers Agents & Representatives, Lewisville
- Manufacturers Representative, Lewisville - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Lewisville
- Manufacturing Equipment & Supplies, Lewisville
- Manufacturing Products, Lewisville
- Marinas & Marina Services, Lewisville
- Marine & Lake Services, Lewisville
- Marine Electronic Equipment, Lewisville
- Marine Products And Services, Lewisville
- Marine Repair & Service Stations, Lewisville
- Marine Supplies & Equipment, Lewisville - Boat Supplies
- Marine Supplies & Equipment - Boat Engine & Drive Train Repair, Lewisville
- Market Research & Analysis , Lewisville - Market Analysis, Business & Economic Research
- Marriage & Family Counselors, Lewisville
- Martial Arts & Self Defense Schools, Lewisville
- Masonry Contractors, Lewisville - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Lewisville
- Massage Therapists & Professional, Lewisville
- Massage Therapy, Lewisville
- Maternity Clothes & Clothing Stores, Lewisville - Maternity Dress, Gown, Swimwear, Underwear & More
- Meat Market, Wholesale & Products, Lewisville
- Mechanical Engineer, Lewisville - Mechanical Engineering Service
- Medical & Dental Management, Lewisville
- Medical & Health Service Organizations, Lewisville
- Medical Diagnostic Clinics, Lewisville - Clinical Labs & Centers
- Medical Equipment Manufacturers, Lewisville
- Medical Groups & Clinics, Lewisville - Medical & Health Centers
- Medical Management & Business Administration Service, Lewisville
- Medical Research, Lewisville
- Medical Research & Development, Lewisville - Medical Information & Research
- Medical Supplies & Equipment, Lewisville
- Medical Transcription Service, Lewisville
- Meeting & Event Planning Services, Lewisville - Conference Consultants
- Membership Sports & Recreation Clubs, Lewisville
- Men's & Boys Clothing & Accessories Stores, Lewisville
- Men's Clothing Stores, Lewisville - Clothes & Accessories
- Men's Shoe Stores, Lewisville
- Mens & Boys Jeans & Western Wear Stores, Lewisville
- Mental Health Clinics, Lewisville - Treatment Centers
- Mental Health Specialists, Lewisville - Psychologist, Psychiatrist, Psychotherapist, etc
- Mental Retardation & Developmentally Disabled Services, Lewisville
- Merchandise Sales Events, Lewisville
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- Merchandising & Marketing Consultants, Lewisville
- Merchandising & Pricing Equipment, Lewisville
- Merle Norman Cosmetics, Lewisville
- Metal Working Machinery, Lewisville
- Methodist Church, Lewisville
- Mexican Restaurants, Lewisville
- Minerals, Lewisville
- Mini & Self Storage, Lewisville
- Mining, Lewisville
- Mining Contractors, Lewisville - Mining Companies, Contractors & Brokers
- Mining, Crude-Oil Production, Lewisville - Mining Companies
- Ministries Church, Lewisville
- Mirrors, Lewisville - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Household Item Repair, Lewisville
- Miscellaneous Agriculture, Lewisville
- Miscellaneous Business Services, Lewisville
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Lewisville
- Miscellaneous Government, Lewisville
- Miscellaneous Industry, Lewisville
- Miscellaneous Manufacturing, Lewisville
- Miscellaneous Personal Services, Lewisville
- Miscellaneous Photographers, Lewisville
- Miscellaneous Professional, Lewisville
- Mobile Home Parks & Communities , Lewisville
- Mobile Homes for Rent & Lease, Lewisville
- Modular & Mobile Homes For Sale, Lewisville - Manufactured Homes Sale & Service
- Modular Buildings, Lewisville - Modular Homes Buildings & Offices
- Molds, Lewisville
- Money Transfer Service, Lewisville
- Monuments, Tombstones, Markers & Memorials, Lewisville
- Mortgage Bankers & Correspondents, Lewisville
- Mortgage Brokers, Lewisville
- Mortgages & Loans, Lewisville
- Motion Picture & Television Production Services, Lewisville
- Motor Sports, Lewisville
- Motor Vehicle, Lewisville
- Motor Vehicle Rental & Leasing, Lewisville
- Motorcycle & ATV Repair & Service, Lewisville
- Motorcycle & Motor Scooters Dealers, Repair & Service, Lewisville
- Motorcycle Parts, Accessories & Dealers, Lewisville
- Motorcycle Repair & Service, Lewisville
- Mountain & Rock Climbing Instruction, Lewisville
- Movie Theaters, Lewisville
- Moving & Storage Supplies & Equipment, Lewisville
- Moving Companies, Lewisville
- Moving Supplies & Equipment Rental, Lewisville
- Moving Truck Rental , Lewisville
- Muffler Shop & Exhaust Systems, Lewisville
- Music, Lewisville
- Music Distribution, Lewisville
- Music Entertainment, Lewisville
- Music Ministry, Lewisville
- Music Publishers & Distribution, Lewisville
- Musical Instrument Rental, Lewisville - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Lewisville
- Musical Instruments - Guitars, Lewisville
- Musicians, Bands & Disc Jockeys, Lewisville
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