- Machine Shop & Tool Repair Service, Commerce City
- Machinery And Equipment Manufacturers, Commerce City
- Machinery, Supplies & Equipment - Business Production Related, Commerce City
- Machinery, Supplies & Equipment - Business Supplies Related, Commerce City
- Machinery, Supplies & Equipment - Construction & Contractor Related, Commerce City
- Mail Delivery Service, Commerce City
- Mailing, Delivery & Courier Service, Commerce City
- Major Appliances, Commerce City - Household & Kitchen
- Malls & Shopping Centers, Commerce City
- Management Consultants & Services, Commerce City
- Manicurists & Pedicurists, Commerce City
- Manufactured & Mobile Home Movers & Transporting, Commerce City
- Manufacturers Agents & Representatives, Commerce City
- Manufacturers Representative, Commerce City - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Commerce City
- Manufacturing Products, Commerce City
- Marble, Commerce City
- Marine Supplies & Equipment, Commerce City - Boat Supplies
- Markets & Grocers Equipment, Commerce City
- Marriage & Family Counselors, Commerce City
- Martial Arts & Self Defense Schools, Commerce City
- Masonry Contractors, Commerce City - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Commerce City
- Mass Transit Vehicle Dealers, Commerce City
- Massage Therapists & Professional, Commerce City
- Massage Therapy, Commerce City
- Material Handling & Heavy Machinery & Equipment, Commerce City
- Material Handling Equipment, Commerce City - Conveyor Belt, Pallet Jack, Forklift, etc
- Meat Market, Wholesale & Products, Commerce City
- Mechanical Contractors, Commerce City - Install, Service & Repair
- Medical Equipment, Supplies, Devices & Instruments - Repair & Service, Commerce City
- Medical Groups & Clinics, Commerce City - Medical & Health Centers
- Medical Supplies & Equipment, Commerce City
- Meeting & Event Planning Services, Commerce City - Conference Consultants
- Membership Sports & Recreation Clubs, Commerce City
- Men's Clothing Stores, Commerce City - Clothes & Accessories
- Mental Health Specialists, Commerce City - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Commerce City
- Messenger Service, Commerce City - Message Receiving & Forwarding Service
- Metal Buildings, Commerce City - Wood Buildings
- Metal Buildings, Commerce City - Kits, Homes, Steel Buildings, etc
- Metal Coating & Allied Services, Commerce City
- Metal Finishers, Commerce City
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- Metal Plating & Polishing, Commerce City
- Metal Services, Commerce City
- Metals, Commerce City
- Mexican Food & Goods Products, Commerce City
- Mexican Restaurants, Commerce City
- Millwork Contractors, Commerce City
- Mini & Self Storage, Commerce City
- Mining, Commerce City
- Mining Consultants, Commerce City
- Mining Equipment & Supplies, Commerce City
- Miscellaneous Business Product Repair, Commerce City
- Miscellaneous Household Item Repair, Commerce City
- Miscellaneous Business Services, Commerce City
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Commerce City
- Miscellaneous Government, Commerce City
- Miscellaneous Industry, Commerce City
- Miscellaneous Manufacturing, Commerce City
- Miscellaneous Personal Services, Commerce City
- Miscellaneous Photographers, Commerce City
- Miscellaneous Professional, Commerce City
- Mobile Automobile Services, Commerce City
- Mobile Home Parks & Communities , Commerce City
- Mobile Lube Systems, Commerce City
- Modular & Mobile Homes For Sale, Commerce City - Manufactured Homes Sale & Service
- Money Transfer Service, Commerce City
- Mortgage Bankers & Correspondents, Commerce City
- Mortgage Contracts & Services, Commerce City
- Mortgages & Loans, Commerce City
- Motion Picture Pre & Post Production Services, Commerce City
- Motor Vehicle, Commerce City
- Motor Vehicle & Car Bodies & Assemblies Manufacturers, Commerce City
- Motor Vehicle Rental & Leasing, Commerce City
- Motorcycle Parts, Accessories & Dealers, Commerce City
- Movie Theaters, Commerce City
- Moving & Storage Supplies & Equipment, Commerce City
- Moving Companies, Commerce City
- Moving Supplies & Equipment Rental, Commerce City
- Moving Truck Rental , Commerce City
- Muffler Shop & Exhaust Systems, Commerce City
- Music, Commerce City
- Musical Instrument Rental, Commerce City - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Commerce City
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