- Machine Shop, Kirtland
- Management Consultants & Services, Kirtland
- Manufacturing, Kirtland
- Marriage & Family Counselors, Kirtland
- Martial Arts & Self Defense Schools, Kirtland
- Masonry Contractors, Kirtland - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Kirtland
- Meat Market, Wholesale & Products, Kirtland
- Meat Packers, Kirtland
- Meeting & Event Planning Services, Kirtland - Conference Consultants
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- Metal Detecting Equipment, Kirtland
- Mexican Restaurants, Kirtland
- Mini & Self Storage, Kirtland
- Mining, Kirtland
- Miscellaneous Government, Kirtland
- Miscellaneous Professional, Kirtland
- Motor Vehicle, Kirtland
- Motor Vehicle Rental & Leasing, Kirtland
- Moving Truck Rental , Kirtland
- Music, Kirtland
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