M
- M-Way
- Mac Allister
- MadCowls
- Mafell
- Magnodur
- Magnum
- Magnusson
- Maia
- Make Good
- Makita
- Manrose
- Manthorpe
- Map Vent
- Mapei
- Marcrist
- Marigold Industrial
- Marquis
- Marshalltown
- Master Lock
- Masterlite
- Masterplug
- Maypole
- McAlpine
- McAlpine Kneepads & Inserts
- MDF-Tite
- Medichief
- Megger
- Melba Swintex
- Menabo
- Metex
- Metis
- Mila
- Milwaukee
- Minky
- Mira
- Mitrebond
- MK
- MK Sentry
- Monument Tools
- Moretti
- Mottez
- Mountfield
- Muck Boots
- Multi Sharp
- Multipanel
- Mydlink
- Myson