| Marklund TR AB | Gävle | 0 tkr |
| Marknadsbolaget Gefle Mässhall AB | Gävle | 0 tkr |
| Markus Sandberg Förvaltning i Gävle AB | Gävle | 0 tkr |
| Marma Trapp- och Plattgjuteri Aktiebolag | Hedesunda | 0 tkr |
| Marqvist Förvaltning AB | Gävle | 0 tkr |
| Mårtén Consulting AB | Gävle | 0 tkr |
| Martin Björkgren Invest AB | Gävle | 0 tkr |
| Martinell Invest AB | Hedesunda | 0 tkr |
| Martin Nilsson Sverige AB | Gävle | 0 tkr |
| Martinsson Transport Holding AB | Valbo | 0 tkr |
| Martob Holding AB | Gävle | 0 tkr |
| Mät & Geo, Björn Nyberg AB | Gävle | 0 tkr |
| Matira AB | Gävle | 0 tkr |
| Mats Emesten Holding AB | Gävle | 0 tkr |
| Mats Huldt Holdingbolag AB | Gävle | 0 tkr |
| Mattias & Magdalena Aktiebolag | Hofors | 0 tkr |
| Mat & Upplevelser i Kungsbäck AB | Hammarö | 0 tkr |
| Max Hoffbrandt Invest AB | Gävle | 0 tkr |
| MaxMikaelsson AB | Gävle | 0 tkr |
| Max T Holding AB | Gävle | 0 tkr |
| MBJ Invest AB | Gävle | 0 tkr |
| MCGW AB | Gävle | 0 tkr |
| MEAC AB | Valbo | 0 tkr |
| M&E Acar AB | Gävle | 0 tkr |
| Meadowman Consulting AB | Gävle | 0 tkr |
| MEDENS AB | Valbo | 0 tkr |
| meenin AB | Gävle | 0 tkr |
| MEJ Entreprenad AB | Gävle | 0 tkr |
| Meklöf Holding AB | Gävle | 0 tkr |
| Melik AB | Gävle | 0 tkr |
| Men visst har vi väl trevligt AB | Gävle | 0 tkr |
| MEOS HOLDING AB | Gävle | 0 tkr |
| Mesken & Emaar Construction AB | Gävle | 0 tkr |
| MESKEN Sverige AB | Gävle | 0 tkr |
| Mesri Konsult AB | Gävle | 0 tkr |
| Metahyd AB | Gävle | 0 tkr |
| MGT Gefle AB | Gävle | 0 tkr |
| MHJ Invest AB | Valbo | 0 tkr |
| MH Taxi i Gävle AB | Sandviken | 0 tkr |
| Midya Gross AB | Valbo | 0 tkr |
| MIEB Invest AB | Gävle | 0 tkr |
| Mi-Em AB | Gävle | 0 tkr |
| MiGu Sales AB | Gävle | 0 tkr |
| Mikael Norman Holding Gävle AB | Gävle | 0 tkr |
| Mikael Pettersson Data AB | Gävle | 0 tkr |
| Mildner consulting AB | Gävle | 0 tkr |
| Miljötransporter UN Aktiebolag | Hamrångefjärden | 0 tkr |
| MillNova AB | Trångsund | 0 tkr |
| Milomilans AB | Gävle | 0 tkr |
| mimwil AB | Gävle | 0 tkr |