- Major Appliance Stores
- Maple Syrup
- Marble
- Marijuana Retail
- Marinas
- Masons
- Massage Therapists
- Meat Brokers
- Meat Wholesalers
- Mechanical Contractors
- Media Monitoring
- Medical Alarm Systems
- Medical Centres
- Medical Laboratories
- Mental Health Service
- Mexican Restaurants
- Middle Eastern Restaurants
- Mortgage Brokers
- Motorcycles
- Mufflers
- Municipal Government
- Musicians
- Mutual Funds