| M.A.M. Invest AB | Södertälje | 0 tkr |
| Månen invest AB | Nykvarn | 0 tkr |
| Manligheten AB | Torhamn | 0 tkr |
| Månsbro i Hovsjö Holding AB | Södertälje | 0 tkr |
| Månsbro Kommersiella AB | Södertälje | 0 tkr |
| Månsbro nr fyra Aktiebolag | Södertälje | 0 tkr |
| Månskottet Holding AB | Södertälje | 0 tkr |
| Marco Jonsson Holding AB | Nacka | 0 tkr |
| Marco Naim Holding AB | Södertälje | 0 tkr |
| Marcus Deniz AB | Södertälje | 0 tkr |
| Marensvik AB | Södertälje | 0 tkr |
| Mariandersborg AB | Södertälje | 0 tkr |
| Maria Poli AB | Södertälje | 0 tkr |
| Marit Mossbäck AB | Järna | 0 tkr |
| Markku Ratilainen Holding AB | Södertälje | 0 tkr |
| Martinez Architects AB | Södertälje | 0 tkr |
| Martsan AB | Uppsala | 0 tkr |
| Maskinservice i Järna AB | Järna | 0 tkr |
| Matar Nuts AB | Södertälje | 0 tkr |
| Maton Ventures AB | Södertälje | 0 tkr |
| Mats Gustafsson Läkartjänst AB | Gnesta | 0 tkr |
| Mats Larsson Entreprenad AB | Enhörna | 0 tkr |
| Mats Udd Consulting AB | Hölö | 0 tkr |
| Mattias & Cecilia Andersson AB | Mölnbo | 0 tkr |
| Matti Invest AB | Södertälje | 0 tkr |
| MATYAB AB | Hölö | 0 tkr |
| MAWEJ HM grön fastighet 2 AB | Södertälje | 0 tkr |
| MAWEJ HM Group AB | Södertälje | 0 tkr |
| MAWEJ Invest AB | Södertälje | 0 tkr |
| MB Bageri AB | Huddinge | 0 tkr |
| MBT Agenturer AB | Södertälje | 0 tkr |
| MC-Motor Aktiebolag | Enhörna | 0 tkr |
| MDA Holding AB | Södertälje | 0 tkr |
| MDDM Holding Stlje AB | Södertälje | 0 tkr |
| MediCenter Gentron AB | Rönninge | 0 tkr |
| MedMening sociala innovationer AB | Enhörna | 0 tkr |
| MEER Holding AB | Södertälje | 0 tkr |
| Melange Consulting AB | Järna | 0 tkr |
| Melek 1923 AB | Södertälje | 0 tkr |
| MELIKAN Förvaltning AB | Johanneshov | 0 tkr |
| Melina Logistik AB | Södertälje | 0 tkr |
| Melkemoro Holding AB | Södertälje | 0 tkr |
| Melodie Bil Expertis AB | Gävle | 0 tkr |
| Melolontha AB | Södertälje | 0 tkr |
| Melton Holding AB | Södertälje | 0 tkr |
| Melvin Aras Holding AB | Södertälje | 0 tkr |
| Meno Group AB | Södertälje | 0 tkr |
| MerVärden AB | Kolmården | 0 tkr |
| M.E.S.I AB | Södertälje | 0 tkr |
| Metin Invest AB | Södertälje | 0 tkr |