M
- Mac Allister
- Macpherson
- Magnodur
- Magnum
- Magnusson
- Maia
- Makita
- Manrose
- Manthorpe
- Map Vent
- Mapei
- Marcrist
- Mariz
- MARK
- Marshall Tufflex
- Marshalltown
- Mascot
- Master Lock
- Masterplug
- Maypole
- McAlpine
- McAlpine Kneepads
- MCR Safety
- MDF-Tite
- Megger
- Melba Swintex
- Mercia
- Metex
- Metis
- Mila
- Milwaukee
- Mini Marquee
- Minky
- Mira
- Mitrebond
- MK
- MK Sentry
- Monument Tools
- Mottez
- Mountfield
- Muck Boots
- Multi Sharp
- Multipanel
- Myson