| Mel Moreppen 15 AS | Real estate | 2024 |
| Melbye AS | Wholesale & retail | 1986 |
| Melbye Group AS | Wholesale & retail | 1946 |
| Melodi Planet Da | Administrative & support | 2012 |
| Mennesker Omsorg Kompentanse AS | Health & social care | 2024 |
| Meps 1 Holding AS | Real estate | 2021 |
| Messelys AS | Administrative & support | 2020 |
| MG Markiser AS | Wholesale & retail | 2021 |
| MG Rørservice AS | Construction | 2023 |
| Microbeads AS | Manufacturing | 2002 |
| Mikels Kaffebrenneri Holding AS | Manufacturing | 2024 |
| Mikkel Melhus AS | | 2019 |
| Miljø Solutions AS | Administrative & support | 2018 |
| Mirlashari Dagligvare AS | Wholesale & retail | 2017 |
| Mje Nopas Holding AS | | 2018 |
| MM Transport AS | Transport & logistics | 2023 |
| MNL Holding AS | | 2026 |
| Mobility Pool AS | Administrative & support | 2017 |
| Mobæk Holding AS | Financial services | 2018 |
| Modino AS | Wholesale & retail | 2000 |
| Modino Norden AS | Wholesale & retail | 2021 |
| Moen Technologies AS | Construction | 2023 |
| Molstad AS | Wholesale & retail | 2024 |
| Moltzau Holding AS | Manufacturing | 2023 |
| Moltzau Packaging AS | Manufacturing | 2023 |
| Molund Musikk AS | Arts & recreation | 2019 |
| Momo Sushi AS | Hospitality | 2015 |
| Morgenlien AS | Transport & logistics | 2002 |
| Motopiknik AS | Construction | 2022 |
| Mouho Invest AS | | 2022 |
| MRS Service AS | Construction | 2010 |
| MRW Invest Holding AS | | 2024 |
| MS Anlegg AS | Transport & logistics | 2018 |
| MS Consult AS | Professional & scientific | 2005 |
| Mtapas AS | Hospitality | 2001 |
| Multibox AS | Wholesale & retail | 2006 |
| MWK Holdning AS | | 2026 |
| Myca Eiendom AS | Real estate | 1922 |
| Myca Holding AS | Real estate | 1998 |
| Myrveien 10 AS | Real estate | 2021 |
| Mythika AS | Wholesale & retail | 2026 |
| Månestråle Invest AS | | 2022 |
| Månetoppen Holding AS | | 2025 |
| Måsøy Invest AS | Hospitality | 2018 |
| Mørch & Koldre Mur & Flis AS | Construction | 2001 |
| Naalem AS | Professional & scientific | 2017 |
| Nana Transport AS | Transport & logistics | 2025 |
| Naprapat Thomas Lund Johannesen AS | Health & social care | 2022 |
| Natsun Kampsport Da | Arts & recreation | 2008 |
| Navarsete Skedsmo AS | Hospitality | 2025 |
| Nederman Norge, Filial Til Nederman Nordic Nuf | Wholesale & retail | 2014 |
| Nedre Romerike Bygg AS | Construction | 2011 |
| Negotium AS | Wholesale & retail | 1980 |
| Nekon AS | Wholesale & retail | 1989 |
| Neo Monitors AS | Manufacturing | 2003 |
| Neo- Norsk Energioptimalisering AS | Real estate | 2020 |
| Nets Group AS | Real estate | 1975 |
| Nettkonsult AS | Information & communication | 2022 |
| Newcastle Consulting AS | Professional & scientific | 2013 |
| Nextgen AS | Wholesale & retail | 2011 |
| Nidor Eiendom AS | Real estate | 1976 |
| Nirak Boliger AS | Wholesale & retail | 2007 |
| Nirak Company AS | Wholesale & retail | 1973 |
| Nirak Eiendommer AS | Wholesale & retail | 1966 |
| Nittedalsgate 31 Holding AS | Real estate | 2015 |
| NM Holding AS | Information & communication | 2008 |
| Noa Design & Bygg AS | Construction | 2025 |
| Nopas AS | Real estate | 1971 |
| Noradalen AS | Financial services | 2012 |
| Norasport Industri AS | Manufacturing | 2015 |
| Nordahl Skjerpan Invest AS | | 2023 |
| Nordic Crane AB | Administrative & support | 2003 |
| Nordic Crane AS | Construction | 1989 |
| Nordic Crane Group AS | Construction | 2014 |
| Nordic Crane Heavy Lift AS | Administrative & support | 2010 |
| Nordic Machinery AS | Wholesale & retail | 2013 |
| Nordic Pro Tech AS | Wholesale & retail | 2017 |
| Nordictarget AS | Wholesale & retail | 2015 |
| Norditt Holding AS | Professional & scientific | 2018 |
| Nordvollveien Veilag SA | Real estate | 2011 |
| Norgem AS | Wholesale & retail | 2018 |
| Nors Bygg AS | Construction | 2014 |
| Norsk Lystbåtdestruksjon AS | Wholesale & retail | 2017 |
| Norsk Stanseindustri AS | Manufacturing | 1990 |
| Norsk Tele Og Data AS | Wholesale & retail | 2003 |
| Norsk VVS Ekspert AS | Construction | 2016 |
| Norsk VVS Teknikk AS | Construction | 2024 |
| Norske Fasader AS | Real estate | 2017 |
| Nortekk AS | Construction | 1991 |
| Nortekk Eiendom AS | Real estate | 2013 |
| Nortekk Holding AS | Construction | 2024 |
| Nortekk Taksenter AS | Wholesale & retail | 1983 |
| Norwegian Pharmacy AS | Wholesale & retail | 2019 |
| Norwegian Trading Sector AS | Wholesale & retail | 2022 |
| Novum Norway AS | Wholesale & retail | 2005 |
| Nowus Healthcare AS | Wholesale & retail | 2023 |
| NP Logistikk AS | Transport & logistics | 2020 |
| NP Transport Express AS | Transport & logistics | 2000 |
| NR Bygg Eiendom AS | Real estate | 2025 |
| NRB Eiendom AS | Real estate | 2020 |