| MDC Consulting AB | Kalmar | 0 tkr |
| MediaAnalys Holding AB | Ljungbyholm | 0 tkr |
| MediaBygg Konsult i Sverige AB | Kalmar | 0 tkr |
| Medi Adri Aktiebolag | Kalmar | 0 tkr |
| Mediafabriken i Kalmar Aktiebolag | Kalmar | 0 tkr |
| MediaSken AB | Kalmar | 0 tkr |
| Mediflo AB | Kalmar | 0 tkr |
| Mehlq Experience Aktiebolag | Kalmar | 0 tkr |
| Meholder AB | Kalmar | 0 tkr |
| Melkea AB | Kalmar | 0 tkr |
| Mellrock AB | Kalmar | 0 tkr |
| Merecta AB | Färjestaden | 0 tkr |
| Metall o. Robot-Teknik Kjell Nilsson Aktiebolag | Rockneby | 0 tkr |
| M&G Johansson Aktiebolag | Kalmar | 0 tkr |
| MG Property Invest AB | Kalmar | 0 tkr |
| M. Håkansson AB | Kalmar | 0 tkr |
| Michael R AB | Kalmar | 0 tkr |
| Micke Kjellgren i Kalmar AB | Kalmar | 0 tkr |
| Middlestone Invest AB | Kalmar | 0 tkr |
| MIJT AB | Kalmar | 0 tkr |
| Mikael Sköldenklint AB | Kalmar | 0 tkr |
| Mikael Thore Ventures AB | Kalmar | 0 tkr |
| Miljökonsult Sydost AB | Kalmar | 0 tkr |
| Miljövet i Kalmar AB | Kalmar | 0 tkr |
| Miråk Holding AB | Timmernabben | 0 tkr |
| Mivendor AB | Nybro | 0 tkr |
| Mivendor Invest AB | Nybro | 0 tkr |
| Miwicon AB | Mönsterås | 0 tkr |
| M Johansson 103 AB | Kalmar | 0 tkr |
| M.Jonsén Solutions AB | Kalmar | 0 tkr |
| MKS Fastigheter i Kalmar AB | Kalmar | 0 tkr |
| MNR Invest AB | Färjestaden | 0 tkr |
| MOA Förvaltning AB | Kalmar | 0 tkr |
| Molins Fastighetsutveckling Holding AB | Kalmar | 0 tkr |
| Molins Industrihus Aktiebolag | Kalmar | 0 tkr |
| Möllstorp 2:3 AB | Kalmar | 0 tkr |
| Möltorps Invest AB | Läckeby | 0 tkr |
| MONIRA livs AB | Kalmar | 0 tkr |
| MÖRE MEKANISKA AB | Hagby | 0 tkr |
| Mosters Bak AB | Kalmar | 0 tkr |
| Moveåtta Fastigheter AB | Kalmar | 0 tkr |
| Movefem Förvaltnings AB | Kalmar | 0 tkr |
| Movenio Fastigheter AB | Kalmar | 0 tkr |
| Movesex Fastigheter AB | Kalmar | 0 tkr |
| Movesju Fastigheter AB | Kalmar | 0 tkr |
| Movetvå Fastigheter AB | Kalmar | 0 tkr |
| MP Group Holding AB | Läckeby | 0 tkr |
| MP Holding i Kalmar AB | Kalmar | 0 tkr |
| MPK Maskinteknik AB | Kalmar | 0 tkr |
| MSG KALMAR AB | Kalmar | 0 tkr |