| MH Holdings AS | | 2025 |
| MH Interiør Og Boligfornying AS | Construction | 2025 |
| MH Kleven Da | Arts & recreation | 2017 |
| MH Partners Advokatfirma AS | Professional & scientific | 2025 |
| MH Partners Holding AS | | 2025 |
| MHD Holding AS | | 2021 |
| Mhost Likely AS | Information & communication | 2020 |
| Mhvs Invest AS | Real estate | 2022 |
| Mhø Holding AS | | 2025 |
| Mi Casa Tu Casa AS | Real estate | 2017 |
| Mias Blomster Ans | Wholesale & retail | 1990 |
| Miavi AS | Professional & scientific | 2014 |
| Miavi Management AS | Professional & scientific | 2025 |
| Michael Investeringer AS | | 2022 |
| Michael Krohns Gate 27-29 AS | Real estate | 2019 |
| Michael Krohns Gate 44 AS | Real estate | 2015 |
| Michelle Ullestad AS | Arts & recreation | 2022 |
| Michelsen AS | Hospitality | 2003 |
| Mideast Ship Management Ltd | Administrative & support | 2000 |
| Midgard Alfa AS | Real estate | 2009 |
| Midgard Beta AS | Real estate | 2008 |
| Midgard Bolig AS | Real estate | 2012 |
| Midgard Delta AS | Real estate | 2012 |
| Midgard Forvaltning AS | Real estate | 2008 |
| Midgard Gruppen AS | Real estate | 2010 |
| Midgard Nord AS | Real estate | 2004 |
| Midgard Næring AS | Real estate | 2011 |
| Midgard Vest AS | Real estate | 2011 |
| Midgard Zeta AS | Real estate | 2020 |
| Midlaier Health AS | Information & communication | 2024 |
| Midtbygget AS | Real estate | 2016 |
| Midtpunkt AS | Real estate | 2016 |
| Midtstegen Industribygg AS | Real estate | 1985 |
| Midttun-Rawal Consulting AS | Health & social care | 2012 |
| Midtun Brudd Eiendom AS | Real estate | 2021 |
| Midtun Consulting AS | Professional & scientific | 2007 |
| Midtunhaugen 10 AS | Real estate | 1998 |
| Midtunlia 73 AS | Real estate | 2015 |
| Midtunlia 73 Eiendom Ans | Real estate | 2001 |
| Miet Holding AS | | 2023 |
| Mif Holding AS | | 2021 |
| Mikk Holding AS | Real estate | 2009 |
| Mikonsult AS | Professional & scientific | 2013 |
| Mikrobo AS | Real estate | 2020 |
| Milde Psykologpraksis AS | Health & social care | 2025 |
| Mile Investering AS | Financial services | 1997 |
| Milepel AS | Real estate | 2008 |
| Milepel Business Hub AS | Real estate | 2006 |
| Milepel Campus AS | Real estate | 2010 |
| Miliarium Invest AS | Financial services | 2020 |
| Milieu AS | Information & communication | 2021 |
| Miljø Bygg Vest AS | Construction | 1992 |
| Miljø Engros AS | Wholesale & retail | 2006 |
| Miljø Og Plan AS | Professional & scientific | 2008 |
| Miljøconsult AS | Professional & scientific | 1999 |
| Miljødronningen AS | Transport & logistics | 1997 |
| Miljøfaglig Utredning AS | Professional & scientific | 2002 |
| Miljøhuset AS | Real estate | 1994 |
| Miljøhuset Tromsø AS | Construction | 1998 |
| Millennium Lagoon Records Ans | Arts & recreation | 1998 |
| Millingly AS | Information & communication | 2026 |
| Millions of Billions Holding AS | Financial services | 2018 |
| Milsol Invest AS | Real estate | 2022 |
| Mimain Matto Compagna AS | Financial services | 2015 |
| Mimir Media Tech AS | Information & communication | 2019 |
| Min Heim AS | Real estate | 2015 |
| Min Mentor AS | Education | 2021 |
| Mind Your Body AS | Health & social care | 2016 |
| Minde Alle 39 AS | Real estate | 1922 |
| Minde Allé 35 AS | Real estate | 1996 |
| Minde Allé 36 AS | Real estate | 2007 |
| Minde Allé 4 AS | Real estate | 2014 |
| Minde Allé 43 AS | Real estate | 2011 |
| Minde Dyreklinikk AS | Professional & scientific | 2022 |
| Minde Elektronikkservice Da | Other services | 1995 |
| Minde Invest AS | | 2021 |
| Minde Jernvare & Sport AS | Wholesale & retail | 1979 |
| Minde Legepraksis Da | Health & social care | 2013 |
| Minde Legepraksis Eiendom AS | Real estate | 2005 |
| Minde Medisinske Senter AS | Health & social care | 2023 |
| Minde Prosjekt AS | Real estate | 1984 |
| Minde Revisjon AS | Professional & scientific | 2012 |
| Minde Servicebakeri AS | Hospitality | 2017 |
| Minde Snekkeri AS | Manufacturing | 1983 |
| Minde Squashklubb AS | Arts & recreation | 2016 |
| Mindeparken 105 AS | Real estate | 2013 |
| Mindeparken AS | Transport & logistics | 2006 |
| Mindflow AS | Information & communication | 2025 |
| Minding Minds AS | Health & social care | 2017 |
| Mindlabjourney AS | Information & communication | 2025 |
| Mindsahead AS | Health & social care | 2016 |
| Mindsphere AS | Information & communication | 2000 |
| Mindtodevelop AS | Information & communication | 2013 |
| Mine Eiendommer AS | Real estate | 2015 |
| Mine Finans AS | Real estate | 2016 |
| Mine Kapital AS | Real estate | 2023 |
| Mine Prosjekt F44 AS | Real estate | 2023 |
| Mine Utvikling AS | Real estate | 2020 |
| Minihydro Modules AS | Professional & scientific | 2016 |
| Minihydro Norge AS | Wholesale & retail | 2007 |