| MH VVS Konsult AB | Enköping | 0 tkr |
| MH Wester AB | Storvreta | 0 tkr |
| Mia Clarke Art AB | Knivsta | 0 tkr |
| MIB nr 113 AB | Bålsta | 0 tkr |
| Micael Sjölund AB | Alunda | 0 tkr |
| Michaela Karman Invest AB | Alunda | 0 tkr |
| Michael Ohlsson Service AB | Almunge | 0 tkr |
| Mickelmania AB | Bålsta | 0 tkr |
| Mickis Invest AB | Hållnäs | 0 tkr |
| Micmau AB | Bålsta | 0 tkr |
| Micropharmics AB | Uppsala | 0 tkr |
| Micropulse Diagnostics AB | Uppsala | 0 tkr |
| Midyat Holding AB | Enköping | 0 tkr |
| Miel AB | Storvreta | 0 tkr |
| Mikael Adén Holding AB | Uppsala | 0 tkr |
| Mikael Lindgren Holding AB | Hargshamn | 0 tkr |
| Mikael Smedeby Advokat AB | Uppsala | 0 tkr |
| Mikael Wallén AB | Uppsala | 0 tkr |
| Mildred AB | Uppsala | 0 tkr |
| Mile consulting AB | Uppsala | 0 tkr |
| Milfred AB | Uppsala | 0 tkr |
| Milia Ljusdal 8:33 AB | Bålsta | 0 tkr |
| Millevent AB | Uppsala | 0 tkr |
| MiLo Holding AB | Uppsala | 0 tkr |
| Milonga Resources Aktiebolag | Uppsala | 0 tkr |
| Milowa AB | Bålsta | 0 tkr |
| Mimameid Förvaltnings AB | Bålsta | 0 tkr |
| Mimmis Salong AB | Uppsala | 0 tkr |
| Mimoni AB | Uppsala | 0 tkr |
| Mimoos Holding Aktiebolag | Solna | 0 tkr |
| Mimr Analytics AB | Hägersten | 0 tkr |
| MINDPLEX AI AB | Knivsta | 0 tkr |
| Mindywork AB | Uppsala | 0 tkr |
| MIR Akademien AB | Knivsta | 0 tkr |
| Mirandion Software AB | Uppsala | 0 tkr |
| Mirarii AB | Alunda | 0 tkr |
| Mir Enterprise AB | Uppsala | 0 tkr |
| Miriam Tallroth Holding AB | Uppsala | 0 tkr |
| Mirida Ekonomikonsult AB | Uppsala | 0 tkr |
| MirVin Holding AB | Uppsala | 0 tkr |
| MISAM AB | Uppsala | 0 tkr |
| Miss C Invest AB | Häggeby | 0 tkr |
| Mitigation AB | Uppsala | 0 tkr |
| Mivik Management AB | Uppsala | 0 tkr |
| Mix Kompetens AB | Enköping | 0 tkr |
| Mixport Aktiebolag | Karlholmsbruk | 0 tkr |
| MJ Network Services i Mälardalen AB | Fjärdhundra | 0 tkr |
| MJOLP AB | Knivsta | 0 tkr |
| MJP Intressenter AB | Uppsala | 0 tkr |
| MJ Strömberg AB | Bälinge | 0 tkr |