| Maskinkonsult i Sverige AB | Eskilstuna | 0 tkr |
| Masod AB | Gnesta | 0 tkr |
| Masoudco AB | Södertälje | 0 tkr |
| Måsta grill och bar Aktiebolag | Eskilstuna | 0 tkr |
| Mathias Haag Consulting AB | Eskilstuna | 0 tkr |
| Mathilde Entertainment Holding AB | Eskilstuna | 0 tkr |
| Mathörnet i Strängnäs AB | Strängnäs | 0 tkr |
| MatKapet AB | Sparreholm | 0 tkr |
| Mat & Musik i Eskilstuna AB | Eskilstuna | 0 tkr |
| MatPassion i Flen AB | Katrineholm | 0 tkr |
| Mats Dahlberg Holding AB | Nyköping | 0 tkr |
| Mats Eriksson i Stigtomta AB | Stigtomta | 0 tkr |
| Mats Haglund Förvaltning AB | Stavsjö | 0 tkr |
| Mats Redin AB | Malmköping | 0 tkr |
| Matte A Invest AB | Nyköping | 0 tkr |
| Mattias Forsberg Holding AB | Nyköping | 0 tkr |
| Mattias Wennerström Holding AB | Strängnäs | 0 tkr |
| Mattias Zingmark Kommunikation AB | Norrköping | 0 tkr |
| Mattkniven AB | Katrineholm | 0 tkr |
| Mattsson Culafic Holding AB | Gnesta | 0 tkr |
| Mauni invest AB | Stigtomta | 0 tkr |
| MAXA Studio AB | Eskilstuna | 0 tkr |
| Maxat AB | Nyköping | 0 tkr |
| Maxea AB | Sparreholm | 0 tkr |
| M. Axelsson i Strängnäs AB | Strängnäs | 0 tkr |
| MB3 Konsult AB | Stockholm | 0 tkr |
| M Bengtsson Invest AB | Eskilstuna | 0 tkr |
| MBJW AB | Trosa | 0 tkr |
| M. Brunelius Holding AB | Nyköping | 0 tkr |
| MCLS Holding AB | Nyköping | 0 tkr |
| Meby Fastighets AB | Skogstorp | 0 tkr |
| Mecq Nordic AB | Strängnäs | 0 tkr |
| MEDAM AB | Stockholm | 0 tkr |
| Medbergs Holding AB | Strängnäs | 0 tkr |
| Medibyte AB | Enskede | 0 tkr |
| MEDICURA Medical Solutions AB | Eskilstuna | 0 tkr |
| MediDoc Consulting AB | Eskilstuna | 0 tkr |
| Meditati AB | Malmö | 0 tkr |
| Mediwona AB | Falun | 0 tkr |
| Medwise Consulting AB | Eskilstuna | 0 tkr |
| Megaja AB | Eskilstuna | 0 tkr |
| MEH Redovisning i Oxelösund AB | Oxelösund | 0 tkr |
| Mejenqvist Invest AB | Eskilstuna | 0 tkr |
| Mektig AB | Eskilstuna | 0 tkr |
| Mektig Invest AB | Eskilstuna | 0 tkr |
| Melfa Holding AB | Nyköping | 0 tkr |
| Mellansvenska Konsultbolaget AB | Ärla | 0 tkr |
| Mellansverige Villan AB | Eskilstuna | 0 tkr |
| Mellisberg Holding AB | Nyköping | 0 tkr |
| MENGNES AB | Eskilstuna | 0 tkr |