- Machine Shops
- Machinery Repair
- Machinery Sales
- Maid Service
- Major Appliance Stores
- Makeup Artists
- Management Consultants
- Manicures and Pedicures
- Manufactured Homes
- Marble
- Marijuana Retail
- Marine Contractors
- Marketing Agencies
- Martial Arts Schools
- Masons
- Massage Parlours
- Massage Therapists
- Mats
- Mattresses
- Meat Packers
- Mechanical Belting
- Mechanical Contractors
- Medical Centres
- Medical Clinics
- Medical Laboratories
- Medical Supplies
- Men S Clothing Stores
- Mental Health Service
- Merchandise Warehouses
- Metal Buildings
- Metal Recycling
- Metals
- Mexican Restaurants
- Microwave Ovens
- Middle Eastern Restaurants
- Millwork
- Mirrors
- Missions
- Mobile Home Dealers
- Mobile Home Parks
- Mobile Home Transporters
- Modular Construction
- Money Transfers
- Mortgage Brokers
- Mortgages
- Motels
- Motorcycles
- Moving and Storage
- Moving Supplies
- Mufflers
- Multimedia
- Municipal Government
- Museums
- Music Lessons
- Music Stores
- Mutual Funds