- Machine Shops
- Magazines
- Makeup Artists
- Management Consultants
- Maple Syrup
- Maple Syrup Equipment
- Martial Arts Schools
- Masons
- Massage Therapists
- Mattresses
- Mechanical Contractors
- Medical Centres
- Medical Clinics
- Medical Supplies
- Mental Health Service
- Metals
- Mortgage Brokers
- Mortgages
- Motorcycles
- Mouldings
- Moving and Storage
- Mufflers
- Multimedia
- Municipal Government
- Museums
- Music Lessons
- Mutual Funds