| Mats Israelsson Holding AB | Uppsala | 0 tkr |
| Mats Loberg Konsult & Förvaltning AB | Enköping | 0 tkr |
| Mats Marklund konsult AB | Örsundsbro | 0 tkr |
| Matsugen i Sverige AB | Enköping | 0 tkr |
| Mats Wahlén Elkraftkonsult AB | Enköping | 0 tkr |
| Matthias Palmér AB | Uppsala | 0 tkr |
| Mattias Ehlin Hair Team AB | Uppsala | 0 tkr |
| Mattias Jansson Holding AB | Uppsala | 0 tkr |
| Mattias Östlund Invest AB | Uppsala | 0 tkr |
| Mattias Påhlsson Holding AB | Uppsala | 0 tkr |
| Mattias Prage Advokat AB | Uppsala | 0 tkr |
| Matts Mat AB | Uppsala | 0 tkr |
| Mattssons Trä & Byggvaror AB | Skärplinge | 0 tkr |
| Mavisi AB | Uppsala | 0 tkr |
| MA Vreta AB | Uppsala | 0 tkr |
| Maxella Research AB | Uppsala | 0 tkr |
| Max Fritid AB | Bålsta | 0 tkr |
| Maxim Förvaltning AB | Uppsala | 0 tkr |
| Max Nerdal AB | Uppsala | 0 tkr |
| Max Power Holding AB | Uppsala | 0 tkr |
| MBD Trading AB | Knivsta | 0 tkr |
| M Berlin Invest AB | Uppsala | 0 tkr |
| MB Holding AB | Uppsala | 0 tkr |
| MBIA Konsult AB | Knivsta | 0 tkr |
| M Björkmans Kapitalholding AB | Östhammar | 0 tkr |
| MBÖ Holding AB | Bålsta | 0 tkr |
| MB Scientific Holding AB | Uppsala | 0 tkr |
| MB Thorax AB | Östhammar | 0 tkr |
| MCÅ Consulting AB | Uppsala | 0 tkr |
| MCA Produktion AB | Uppsala | 0 tkr |
| MCK Assistans 24 AB | Uppsala | 0 tkr |
| Mckie Media AB | Lund | 0 tkr |
| MCW Gruppen AB | Uppsala | 0 tkr |
| Mdcab AB | Askim | 0 tkr |
| MDJ Transport & Fastigheter AB | Tierp | 0 tkr |
| MDLM Holding AB | Uppsala | 0 tkr |
| M&D Packaging Aktiebolag | Uppsala | 0 tkr |
| MD Property Holding AB | Uppsala | 0 tkr |
| MD Success Aktiebolag | Stockholm | 0 tkr |
| MDS VT Technology AB | Danderyd | 0 tkr |
| MEAB i Uppsala AB | Uppsala | 0 tkr |
| MEAW AB | Enköping | 0 tkr |
| Mechanical Attack AB | Uppsala | 0 tkr |
| Mecland Holding Aktiebolag | Öregrund | 0 tkr |
| MEConSer AB | Bromma | 0 tkr |
| Medeca Holding AB | Uppsala | 0 tkr |
| Medelberg Holding AB | Knivsta | 0 tkr |
| Medelvägen AB | Gävle | 0 tkr |
| Medem AB | Uppsala | 0 tkr |
| Media Crue AB | Stockholm | 0 tkr |