Chain stores
- M-Market
- Machineland
- Madmum Coffee
- Maison 123
- Maison Dandoy
- Maisons du Monde
- Makro
- Makro Brasserie
- Maldex
- Mamadepot
- Mango
- Manhattn's Burgers
- Manpower
- Marbaise
- Marc Cain Store
- Marc O'Polo
- Marie Méro
- Marina Rinaldi
- Mary
- Massimo Dutti
- Massimodo
- Match
- Max Mara
- Maxi Toys
- Maxi Zoo
- Mayerline
- McDonald's
- McGregor Shop
- Medi-Market
- Media Markt
- Medicare Market
- Mega World
- Meno
- Mephisto
- Meubelzorg
- MEXX
- Microforce
- Microman
- Midas
- Mister Genius
- Mister Minit
- Mister Spaghetti
- Modemakers
- Moggy's
- Molders
- Moochie Frozen Yoghurt
- Movie MAX
- Mr. Bricolage
- MS Mode
- Multipharma
- Munt Fashion
- Mutualité Libérale Liège-Luxembourg
- My Jewellery Boutique
- MyPrice