| Majorstuveien 34 Næring AS | Real estate | 2022 |
| Mak Byggpartner AS | Construction | 2023 |
| Mak Maler Bygg AS | Construction | 2024 |
| Mak Regnskap AS | Professional & scientific | 2024 |
| Maler Beka AS | Construction | 2012 |
| Mali's Beauty AS | Wholesale & retail | 2019 |
| Malik Eiendom AS | Real estate | 2013 |
| Maliksen AS | Hospitality | 2017 |
| Managements AS | Information & communication | 2022 |
| Marhen AS | Real estate | 2007 |
| Mariadasan AS | Health & social care | 2012 |
| Marius Snekker Og Vedlikehold AS | Construction | 2015 |
| Martel Kompetanse AS | Health & social care | 2024 |
| Martins Eiendom AS | Construction | 2018 |
| Mashadi AS | Professional & scientific | 2021 |
| Maskinentreprenør J Bjørntvedt AS | Construction | 2022 |
| Master Manole Studios AS | Information & communication | 2025 |
| Matches Films AS | Information & communication | 2022 |
| Maura Utvikling AS | Real estate | 2019 |
| Mavi Entreprenør AS | Construction | 2017 |
| Maxando Holding AS | | 2026 |
| Mbi Eiendom AS | Real estate | 1999 |
| Mcgarage AS | Wholesale & retail | 2019 |
| MD Restaurants AS | Hospitality | 2025 |
| Mde Service AS | Administrative & support | 2023 |
| Me & My Cousin AS | Wholesale & retail | 2022 |
| Meeno AS | Health & social care | 2004 |
| Megabygg AS | Information & communication | 2012 |
| Mens Vi Venter Ans | Information & communication | 1995 |
| Meraki AS | Hospitality | 2018 |
| Meraki Drammen AS | Hospitality | 2021 |
| Meronel AS | Professional & scientific | 2014 |
| Messor AS | Professional & scientific | 2006 |
| MH Montering AS | Professional & scientific | 2026 |
| Mian Eiendom AS | Real estate | 2022 |
| Michal Scislowski AS | | 2019 |
| Milan Norway AS | Transport & logistics | 2023 |
| Milena Consult AS | Professional & scientific | 2023 |
| Millento AS | Hospitality | 2016 |
| Mindmatter AS | Information & communication | 2026 |
| Mini Bazar AS | Construction | 2013 |
| Mir Holding AS | Financial services | 2005 |
| Mitau Group AS | Transport & logistics | 2022 |
| Mlo Holding AS | | 2025 |
| MMV Partner AS | Construction | 2014 |
| Mobil Spesialisten AS | Wholesale & retail | 2016 |
| Modela Hairstyle AS | Other services | 2024 |
| Moderne AS | Construction | 2022 |
| Mohini Holding AS | | 2022 |
| Mood+ AS | Wholesale & retail | 2022 |
| Morales AS | Information & communication | 2026 |
| Mosuma Invest AS | Wholesale & retail | 2026 |
| Motor Select AS | Wholesale & retail | 2024 |
| Mui AS | | 2019 |
| Mur & Flistech AS | Construction | 1997 |
| Murmester Kilvær AS | Construction | 1973 |
| MVJ Holding AS | | 2025 |
| My Holding AS | | 2025 |
| Myrdahl Og Sveen AS | Professional & scientific | 1987 |
| Nails Art AS | Other services | 2021 |
| Naimy Holding AS | Real estate | 2020 |
| Naimy Invest AS | Professional & scientific | 2021 |
| Nas AS | Real estate | 2017 |
| Nawa AS | Construction | 2018 |
| Neli VVS AS | Construction | 2021 |
| Nelybygg AS | Construction | 2014 |
| Neo Tokyo Strømmen Storsenter AS | Wholesale & retail | 2025 |
| Nesgata 20 Nye AS | Real estate | 2024 |
| Neverland Beauty AS | | 2010 |
| New Ambassadør Restaurant Og Bar AS | Hospitality | 2016 |
| New York Nails AS | Other services | 2021 |
| Nico Garage AS | Wholesale & retail | 2023 |
| Nilson Group AB Filial Norge Nuf | Wholesale & retail | 2006 |
| Nilson Group AS | Wholesale & retail | 1981 |
| Nivako AS | Construction | 2024 |
| Noahs Ark Barnehage AS | Education | 2016 |
| Noela AS | Administrative & support | 2022 |
| Norcraft AS | Wholesale & retail | 2014 |
| Nordic Properties Group AS | Real estate | 2022 |
| Nordic Property AS | Real estate | 2022 |
| Nordic Range AS | Wholesale & retail | 2021 |
| Nordisk E-Handel AS | Wholesale & retail | 2022 |
| Nordrive Auto AS | Wholesale & retail | 2026 |
| Norge Star AS | Transport & logistics | 2023 |
| Norse Ventilasjon AS | Construction | 2023 |
| Nortrade Group AS | Construction | 2017 |
| Norvik Og Eriksen AS | Construction | 2015 |
| Norwegia Consulting AS | Professional & scientific | 2013 |
| Novo Eiendom AS | Real estate | 2000 |
| Nowo Seafood AS | Wholesale & retail | 2024 |
| NR Trettisju AS | Real estate | 2023 |
| NSM Invest Holding AS | | 2026 |
| Ny & NE AS | Wholesale & retail | 2012 |
| Nzehdj AS | Administrative & support | 2023 |
| O2EL Invest AS | | 2021 |
| Oanh Truong AS | Real estate | 2022 |
| Obsidian Codex Press AS | Information & communication | 2025 |
| Ofs Bygg AS | Construction | 2016 |
| Ok-Er Transport AS | Transport & logistics | 2025 |
| Ole Andreassen Holding AS | Financial services | 2005 |