- Machine Shop Supplies
- Machinery Repair
- Machinery Sales
- Major Appliance Stores
- Manicures and Pedicures
- Mantels
- Maple Syrup
- Maps
- Marble
- Marijuana Retail
- Martial Arts Schools
- Masons
- Massage Therapists
- Massage Therapy Schools
- Material Handling Equipment
- Maternity Clothes
- Mats
- Meat Packers
- Mechanical Contractors
- Media Monitoring
- Medical Centres
- Medical Clinics
- Medical Information
- Medical Laboratories
- Medical Supplies
- Mediterranean Restaurants
- Mental Health Service
- Merchandise Warehouses
- Metal Finishers
- Metaphysical Products and Services
- Mexican Restaurants
- Middle Eastern Restaurants
- Military Goods
- Minerals
- Miscellaneous Investments
- Modelling Agencies
- Modelling Courses
- Mortgage Brokers
- Mortgages
- Motorcycles
- Mould Removal
- Moving and Storage
- Mufflers
- Municipal Government
- Museums
- Music Lessons
- Music Publishers
- Music Stores
- Musical Instrument Stores
- Musicians
- Mutual Funds