| Minami AS | Financial services | 1998 |
| Mindme AS | Professional & scientific | 2016 |
| Mindon AS | Professional & scientific | 2020 |
| Mine Capital AS | | 2025 |
| Minerals Group AS | Mining & quarrying | 2008 |
| Mingde AS | | 2021 |
| Mini Suites AS | Real estate | 2022 |
| Minilageret På Jåttå AS | Real estate | 2023 |
| Minixl AS | Construction | 2026 |
| Mino Service AS | | 2026 |
| Mintaka AS | Professional & scientific | 2023 |
| Mirage Travel Solutions Da | Information & communication | 2009 |
| Misa Energy Partners AS | Professional & scientific | 2021 |
| Mischmasch AS | | 2020 |
| Misma AS | Professional & scientific | 2021 |
| Miss Laurenze AS | Information & communication | 2023 |
| Mitech AS | Wholesale & retail | 2019 |
| Mitera AS | Real estate | 1998 |
| Mith Holding AS | Financial services | 2013 |
| Miura AS | | 2026 |
| Miyako Stavanger AS | Hospitality | 2021 |
| Mjølner Invest AS | Real estate | 2017 |
| Mjølner Invest Eiendom AS | Real estate | 2015 |
| Mjølner Investering AS | Real estate | 2015 |
| Mjølner Multiservice AS | Administrative & support | 2022 |
| Mjømjø AS | Information & communication | 2020 |
| MK Engineering AS | Professional & scientific | 2026 |
| MK1 Holding AS | Real estate | 2015 |
| Mkdir AS | | 2025 |
| MKJ Holding AS | | 2023 |
| MKL Invest AS | | 2024 |
| MKM Consulting AS | Professional & scientific | 2020 |
| MKX AS | Professional & scientific | 2017 |
| ML Group Ventures AS | | 2025 |
| ML Hus AS | Construction | 2019 |
| Mlds AS | | 2023 |
| Mltd Properties AS | Real estate | 2023 |
| MM Beauty AS | Other services | 2025 |
| MM Groceries & Services AS | Wholesale & retail | 2024 |
| Mmacc AS | Real estate | 2005 |
| Mmacc Eiendom AS | Real estate | 2021 |
| Mmbygg AS | Real estate | 2026 |
| MN Beautybar AS | Other services | 2025 |
| MNS Komplett AS | Construction | 2026 |
| Moa Pizza AS | Hospitality | 2026 |
| Mobil Refining Australia Pty. Ltd. | Professional & scientific | 2016 |
| Mobile Airbridge AS | Professional & scientific | 2018 |
| Mobile Lighting Rig AS | Manufacturing | 1999 |
| Mobilityx AS | Professional & scientific | 2025 |
| Mobilt Autospa Nuf | Other services | 2022 |
| Mobilt Bilpleie AS | Other services | 2026 |
| Mocanti Gruppen Nuf | Real estate | 2005 |
| Moder Krima AS | Health & social care | 2022 |
| Modern Hair Style AS | Other services | 2021 |
| Moderne Fiske Da | Manufacturing | 1997 |
| Moe Capital AS | Real estate | 2026 |
| Moet Audio AS | Wholesale & retail | 2014 |
| Mogstad Eiendom AS | Real estate | 2018 |
| Mogul India AS | Hospitality | 2020 |
| Mogusta AS | Real estate | 1982 |
| Moh Invest AS | Real estate | 2005 |
| Mohinna AS | | 2020 |
| Mokalf AS | Financial services | 2005 |
| Moksim AS | | 2005 |
| Mokveld Norge AS | Wholesale & retail | 1998 |
| Mokveld Valves BV | Mining & quarrying | 1995 |
| Moldalsknuten Vindkraft AS | Professional & scientific | 2009 |
| Molino AS | Manufacturing | 2022 |
| Moliver AS | Professional & scientific | 2020 |
| Mollerin Kreativ Ans | Education | 2007 |
| Molnar AS | Administrative & support | 2026 |
| Molteblomen Investering AS | Professional & scientific | 1977 |
| Momento Holding AS | Real estate | 2008 |
| Momentum Trafikkskole AS | Education | 2019 |
| Monarqe AS | Wholesale & retail | 2025 |
| Monella Pizzeria & Pizzoleria AS | Hospitality | 2024 |
| Moneo AS | Real estate | 1998 |
| Monetor AS | Professional & scientific | 2014 |
| Mongstad Offshore AS | Real estate | 2009 |
| Monialis AS | Health & social care | 2013 |
| Monica R. Invest AS | | 2023 |
| Monkey Puzzle AS | Professional & scientific | 2022 |
| Monkey Studio AS | Professional & scientific | 2020 |
| Monni AS | Information & communication | 2026 |
| Mono Eiendom AS | Real estate | 2020 |
| Mono Sjokolade AS | Manufacturing | 2025 |
| Monrad Andersen & Co AS | Wholesale & retail | 1982 |
| Monsen Møbeltapetsering AS | Other services | 2007 |
| Montagu AS | Professional & scientific | 2012 |
| Monte Bianco AS | Real estate | 2020 |
| Monteringsservice AS | Construction | 2007 |
| Monteringsservice Da | Wholesale & retail | 1998 |
| Montrachet AS | Arts & recreation | 2020 |
| Montørgruppen AS | | 2011 |
| Mopshop Technolode Nuf | Wholesale & retail | 2006 |
| Mora AS | Information & communication | 2019 |
| Moray Eiendom AS | Real estate | 2019 |
| Moray Energy AS | Administrative & support | 2022 |
| Moray Energy Holding AS | Administrative & support | 2023 |
| Moray Group AS | Professional & scientific | 2018 |