M
- Mac Allister
- MadCowls
- Magnodur
- Magnum
- Magnusson
- Make Good
- Makita
- Manrose
- Manthorpe
- Map Vent
- Mapei
- Marcrist
- Marigold Industrial
- Marshalltown
- Master Lock
- Masterlite
- Masterplug
- Maypole
- McAlpine
- MDF-Tite
- Medichief
- Megger
- Melba Swintex
- Metex
- Midbrass
- Mila
- Milwaukee
- Minky
- Mira
- Mitrebond
- MK
- Monument Tools
- Mottez
- Mountfield
- Multi Sharp
- Myson