| Mint Innredning AS | Wholesale & retail | 1995 |
| Mio Holding AS | Hospitality | 2013 |
| Miora Utvikling AS | Real estate | 2026 |
| Mipas AS | Administrative & support | 2008 |
| Mira Technologies AS | Information & communication | 2025 |
| Miris Blend Drift AS | Wholesale & retail | 2025 |
| Miris Blend Holding AS | Wholesale & retail | 2024 |
| Mirrors Invest AS | | 2021 |
| Mistfjorden AS | Real estate | 2024 |
| Misthalin AS | Real estate | 2025 |
| Miterit AS | Professional & scientific | 2020 |
| Mitt Barnebarn AS | Health & social care | 2024 |
| Mitt Skattekammer AS | Wholesale & retail | 2005 |
| Mitt Studio AS | Professional & scientific | 2014 |
| MJD Holding AS | | 2013 |
| Mje Invest AS | | 2017 |
| MJM Golema Bygg AS | Construction | 2021 |
| Mjolby Logistics Holding AS | Real estate | 2020 |
| MJS Holding AS | | 2023 |
| Mjølner Holding AS | | 2008 |
| MK Medic AS | Health & social care | 2016 |
| MK Regnskapspartner AS | Professional & scientific | 2020 |
| MK Service & Vedlikehold AS | Manufacturing | 2022 |
| Mk-Holding AS | | 2016 |
| Mko AS | | 2021 |
| Mkrog Invest AS | Information & communication | 2022 |
| ML Anderssen Invest AS | | 2024 |
| ML Real Estate AS | | 2017 |
| Mlog AS | Real estate | 2022 |
| MLV 4 AS | Wholesale & retail | 2008 |
| MLV 6 AS | Real estate | 2013 |
| MM Consulting AS | Construction | 1983 |
| MM Metall AS | Manufacturing | 2011 |
| MM9 Utbygging AS | Real estate | 2018 |
| Mma Trondheim AS | Arts & recreation | 2013 |
| Mme Publications & Assets AS | Manufacturing | 2014 |
| Mminvest AS | | 2025 |
| MMK Eiendom AS | Real estate | 2025 |
| Mmm.Agency AS | Professional & scientific | 2000 |
| MMN AS | Hospitality | 2018 |
| MMR Holding AS | Transport & logistics | 2018 |
| MMR Taxi AS | Transport & logistics | 2019 |
| MN Bygg Nye AS | Construction | 2017 |
| MN Import Da | Wholesale & retail | 2008 |
| MN93 Holding AS | | 2022 |
| MNC AS | Other services | 2024 |
| Mnk-Holding AS | Real estate | 2022 |
| Mo Web Dev AS | Information & communication | 2022 |
| Moan Performance AS | Education | 2026 |
| Mobilits AS | Professional & scientific | 2018 |
| Mobius AS | Education | 2014 |
| Mode Holding AS | Financial services | 2016 |
| Mode Sensors AS | Professional & scientific | 2016 |
| Modern Art Gallery AS | Wholesale & retail | 1986 |
| Modern Holding AS | Real estate | 2018 |
| Modulbygg Norge AS | Manufacturing | 2014 |
| Modulvegger Trondheim AS | Construction | 2000 |
| Moe Games AS | Wholesale & retail | 2025 |
| Moe Rør AS | Construction | 2025 |
| Moeda AS | Financial services | 2014 |
| Moeita AS | | 2022 |
| Mogop AS | Real estate | 2011 |
| Moholt Fotklinikk Da | Health & social care | 2026 |
| Moholt Fysioterapi Da | Health & social care | 2004 |
| Moholt Legesenter AS | Health & social care | 2012 |
| Moholt Næringsbygg AS | Real estate | 2003 |
| Moholt Pizza AS | Hospitality | 2017 |
| Moholt Tannlegesenter AS | Health & social care | 2024 |
| Moiba AS | Construction | 2018 |
| Mojo Catering AS | Hospitality | 2017 |
| Mojoli AS | Financial services | 2007 |
| Mokka AS | | 2025 |
| Moks Holding AS | | 2023 |
| Moksnes Gård AS | Real estate | 2014 |
| Moksnesdalen AS | Real estate | 2014 |
| Molden Holding AS | | 2021 |
| Moldjord Creative AS | Information & communication | 2025 |
| Moldvær Invest AS | | 2020 |
| Molin AS | Transport & logistics | 2017 |
| Mollo AS | Professional & scientific | 2025 |
| Molly Holding AS | Real estate | 2020 |
| Molov 765 Holding AS | | 2023 |
| Molte AS | Information & communication | 2026 |
| Mom-Eiendom AS | Real estate | 2024 |
| Momentum Advokat AS | Professional & scientific | 2015 |
| Momentum Technologies AS | Professional & scientific | 2016 |
| Momentus AS | Professional & scientific | 2023 |
| Momme Carstens AS | Real estate | 1962 |
| Momy Holding AS | | 2017 |
| Mona Grudt AS | Arts & recreation | 1991 |
| Monaco Eiendom AS | Real estate | 2005 |
| Moncorp AS | | 2023 |
| Moneta Invest AS | | 2026 |
| Mong Sushi AS | Hospitality | 2020 |
| Monic AS | | 2021 |
| Monkey Brew AS | Manufacturing | 2016 |
| Monkey Businessmen AS | Manufacturing | 2015 |
| Mono Holding AS | Real estate | 2020 |
| Montana Holding AS | Professional & scientific | 2023 |
| Monte AS | Real estate | 2005 |