| Mileve AS | Sande I Vestfold | 2018 |
| Milevid AS | Fyllingsdalen | 2018 |
| Mili Renhold AS | Oslo | 2019 |
| Miljø & Kvalitet Holding AS | Moss | 2020 |
| Miljø & Støyskjerm AS | Drøbak | 2021 |
| Miljø Chemie AS | Kristiansand S | 1992 |
| Miljø Renholdstjenester AS | Oslo | 2012 |
| Miljø Rent AS | Stavanger | 2017 |
| Miljø Rent Nord AS | Mo I Rana | 2012 |
| Miljø Service Nuf | Drammen | 2014 |
| Miljø Solutions AS | Skedsmokorset | 2018 |
| Miljø, Bygg & Utleie AS | Våle | 2005 |
| Miljø- Og Overflateservice AS | Hønefoss | 2018 |
| Miljø-Team AS | Heimdal | 2001 |
| Miljøbarnehagen AS | Bodø | 2013 |
| Miljøkompaniet AS | Oslo | 1984 |
| Miljølandskap Anlegg AS | Mysen | 2003 |
| Miljølandskap Sørby AS | Mysen | 2006 |
| Miljørent Ans | Inderøy | 1997 |
| Miljøservice Byggrengjøring Da | Øvre Ervik | 1993 |
| Miljøservice Eiendom AS | Stavanger | 2015 |
| Millenium Servicesenter AS | Trondheim | 2025 |
| Millennium Art AS | Oslo | 1999 |
| Miller Building Corporation | Oslo | 1997 |
| Miller Holding AS | Brumunddal | 2017 |
| Millstein AS | Oslo | 2019 |
| Millstein Holding AS | Oslo | 2020 |
| Mime Ans | Bodø | 1997 |
| Mimir LLC | 10025 New York | 2013 |
| Min Kollega AS | Frogner | 2025 |
| Min Produksjon AS | Stavanger | 2018 |
| Min Vaktmester AS | Hamar | 2021 |
| Minar Holding AS | Borgenhaugen | 2021 |
| Mind the G.A.P. AS | Larvik | 2013 |
| Mindaugas Kriuka | Oslo | 2010 |
| Mindelo Marketing - Sociedade Unipessioal Lda | Cv-Mindelo | 2019 |
| Mini AS | Trondheim | 1997 |
| Mini Utleie Da | Harstad | 2007 |
| Mini Wigdal AS | Vikersund | 2020 |
| Mini-Maskin & Utleie AS | Nyborg | 2015 |
| Minigartneren AS | Kråkerøy | 2022 |
| Minikran AS | Ågotnes | 2023 |
| Minikran Øst AS | Drammen | 2025 |
| Minilei AS | Sola | 2025 |
| Minimaskiner AS | Hafslundsøy | 2010 |
| Minimaskinutleige AS | Hosteland | 2006 |
| Minimax Maskinutleie AS | Brumunddal | 2005 |
| Mining Engineering Consultants Pty Ltd | Au-4000 Brisbane | 2014 |
| Miniskog AS | Sande I Vestfold | 2026 |
| Minitek AS | Harstad | 2015 |
| Miniworker AS | Notodden | 2011 |
| Minken Eiendomsservice AS | Gjerdrum | 2026 |
| Minnovation International AB | Se-115 44 Stockholm | 2020 |
| Minnovation International AS | Oslo | 2023 |
| Minoriteten Bemanning AS | Oslo | 2018 |
| Minsti Consulting Aps Nuf | 4600 Køge | 2015 |
| Minstone Ltd | Manchester M1 4Ex England | 2012 |
| Mint Vask AS | Drammen | 2023 |
| Mintie Corporation of Scandinavia AS | Sandefjord | 2002 |
| Minto Ans | Oslo | 2001 |
| Minty 784 Limited | T520 Iht Stockton-On- Tees | 2020 |
| Minus Furniture AS | Sand | 2023 |
| Mipas AS | Trondheim | 2008 |
| Miracle Buddy Shop Aps | Dk-2750 Ballerup | 2012 |
| Mirai Utleie AS | Tønsberg | 2005 |
| Miralex Services AS | Aurland | 2026 |
| Mirinet Multiservicios Limited | Oslo | 2018 |
| Mishkaat Norge AS | Oslo | 2015 |
| Missing Link Ou | 13516 Tallin | 2016 |
| Misslead Ans | Våler I Østfold | 1988 |
| Misterkjølen Skogsvei SA | Rendalen | 1996 |
| Mit Eie AS | Jonsvatnet | 2018 |
| Mitchell Drift AS | Drammen | 2019 |
| Mithem AS | Øvre Vats | 2022 |
| Mitokaro AS | Oslo | 2025 |
| Mitor AS | Sandnes | 2022 |
| Mitt Holding Selskap AS | Røyken | 2020 |
| Mitt Lille Frankrike AS | Fjerdingby | 2017 |
| Miwas AS | Moss | 2022 |
| Mix Sport Holding AS | Bruvoll | 2018 |
| Mixed Style Academy Ans | Oslo | 2002 |
| Mixmotive Limited | Ts7 Obn Middlesbrough | 2018 |
| Mixx Travel Nuf | Oslo | 2019 |
| Mizaki Sports Group AS | Oslo | 2016 |
| MJ Partner Holdings AS | Tranby | 2020 |
| MJ Utleie AS | Myre | 2022 |
| MJC AS | Moss | 2020 |
| Mjelde Kompetanse AS | Haus | 2015 |
| MJH Piping Limited | Cheshire Wa1 1Rg | 2018 |
| MJM Finans AS | Tromsø | 2024 |
| Mjo Sikkerhet AS | Kristiansand S | 2024 |
| Mjogetjønnvegen Veglag SA | Veggli | 2002 |
| Mjolnir Group AS | Sæbøvågen | 2021 |
| MJS Rep & Consulting Nuf | Se-881-91 Sollefteå | 2016 |
| Mjuvs Limited | Cleveland Ts18 3Sh | 2020 |
| Mjåland AS | Bjørkelangen | 2017 |
| Mjølner Multiservice AS | Stavanger | 2022 |
| Mjøsa Bilutleie AS | Furnes | 2022 |
| Mjøsa Renhold AS | Moelv | 2026 |
| MK 1 Fluids Ltd | Aberdeen Ab10 1Hp Scotland | 2018 |