| Maggan & Olas Holding AB | Sölvesborg | 0 tkr |
| Magistratus Fastigheter AB | Lyckeby | 0 tkr |
| Magistratus Fastigheter Bygg 1 AB | Lyckeby | 0 tkr |
| Magistratus Fastigheter Entreprenad AB | Lyckeby | 0 tkr |
| Magnus Karlsson Karlskrona AB | Karlskrona | 0 tkr |
| Magnus Lundin AB | Sölvesborg | 0 tkr |
| Magnus Malmros AB | Ronneby | 0 tkr |
| Magnussons Gräv- & Skogstjänst AB | Karlskrona | 0 tkr |
| Maham AB | Svängsta | 0 tkr |
| MAJO i Karlskrona AB | Karlskrona | 0 tkr |
| Mäklarhuset Sannah Johansson AB | Bräkne-Hoby | 0 tkr |
| Malin Lennartsson AB | Eringsboda | 0 tkr |
| MALKVARN FÖRVALTNINGS AB | Sölvesborg | 0 tkr |
| Malmborg Montage AB | Karlskrona | 0 tkr |
| Malmros Invest AB | Karlskrona | 0 tkr |
| Målsjövägen Holding AB | Asarum | 0 tkr |
| Malthea Laser AB | Karlskrona | 0 tkr |
| Maltina & Mbresa AB | Asarum | 0 tkr |
| Mandira TC Holding AB | Karlskrona | 0 tkr |
| Mange Pange Invest AB | Karlshamn | 0 tkr |
| Måns Mathiasson Holding AB | Kallinge | 0 tkr |
| MarAnd utveckling AB | Sölvesborg | 0 tkr |
| MARANN AB | Karlshamn | 0 tkr |
| Marcus Boberg AB | Sölvesborg | 0 tkr |
| Mare Balticum Maritime AB | Karlskrona | 0 tkr |
| Maria Lindros i Sölvesborg AB | Sölvesborg | 0 tkr |
| Marielund Omsorg AB | Karlskrona | 0 tkr |
| Marike Fastigheter AB | Karlskrona | 0 tkr |
| Marinborgen AB | Karlskrona | 0 tkr |
| Marintim AB | Torhamn | 0 tkr |
| Marita Olssons Hälsobutik i Olofström AB | Olofström | 0 tkr |
| Markus Jensen AB | Karlskrona | 0 tkr |
| Marley TP AB | Olofström | 0 tkr |
| Martin Elsa Holding AB | Mörrum | 0 tkr |
| Maskin Innovatörerna i Carlshamn AB | Bräkne-Hoby | 0 tkr |
| Mät & Cad Konsult (Sydöst) AB | Fågelmara | 0 tkr |
| Matheo & Gabriel AB | Karlskrona | 0 tkr |
| Mathias Berglund AB | Nättraby | 0 tkr |
| Matjak Holding AB | Karlskrona | 0 tkr |
| Matris och pelletsservice i Sverige AB | Olofström | 0 tkr |
| Mats Ermestål AB | Mörrum | 0 tkr |
| Mattias Larsen Holding AB | Sölvesborg | 0 tkr |
| Mattias Nygren Spelutveckling AB | Asarum | 0 tkr |
| Mattias Robertsson Lantbruk AB | Sölvesborg | 0 tkr |
| Matvik-Tärnö Linjen Aktiebolag | Karlshamn | 0 tkr |
| Maverich Holding AB | Karlshamn | 0 tkr |
| Maviano Capital AB | Karlshamn | 0 tkr |
| MAWIL Invest AB | Karlshamn | 0 tkr |
| Maxmatic Syd Aktiebolag | Ramdala | 0 tkr |
| Mayant AB | Kallinge | 0 tkr |