| Netbase AS | Financial services | 2013 |
| Netfone Communications Da | Administrative & support | 2009 |
| Netlife AS | Information & communication | 2001 |
| Nettgaven AS | Information & communication | 1997 |
| Nettlaget AS | Information & communication | 2026 |
| Neumann Holding & Invest AS | Administrative & support | 2004 |
| Neus Invest AS | Professional & scientific | 2012 |
| Neva Invest AS | Professional & scientific | 2024 |
| Nevenyttige Karer AS | Administrative & support | 2012 |
| Nevrofox AS | Information & communication | 2025 |
| Nevrolog Duraj AS | Health & social care | 1999 |
| Nevromind Science AS | Wholesale & retail | 2019 |
| New Access AS | Information & communication | 2018 |
| New Dente 1 AS | Health & social care | 2021 |
| New Dente 2 AS | Health & social care | 2021 |
| New Design Ans | Professional & scientific | 2004 |
| New Gaze AS | Information & communication | 2024 |
| New Ocean Consult AS | Real estate | 1995 |
| New Wave Media AS | Information & communication | 2018 |
| Newco 8 AS | | 2022 |
| Newco Bolig AS | Real estate | 2021 |
| Newco Eiendom AS | Real estate | 2021 |
| Newco Eiendom Holding AS | Real estate | 2015 |
| Newsec Drift AS | Administrative & support | 2008 |
| Newsec Felles AS | Real estate | 2015 |
| Newsec Næringsmegling AS | Real estate | 1993 |
| Newsec Property Asset Management AS | Real estate | 1990 |
| Newsec Rogaland Drift AS | Real estate | 2017 |
| Next Hero AS | Information & communication | 2014 |
| Next Ocean AS | Professional & scientific | 2019 |
| Next Time Invest AS | Administrative & support | 2005 |
| Nextco V AS | Hospitality | 2022 |
| Nextco Vi AS | Manufacturing | 2017 |
| Nextgen Holding AS | | 2026 |
| Nextgenai AS | Information & communication | 2025 |
| Nexus Foresight AS | Information & communication | 2024 |
| NFH 211185 AS | Real estate | 2021 |
| NFH 211195 AS | Real estate | 2021 |
| NFH 2501118 AS | Manufacturing | 2025 |
| Nfo International AS | Professional & scientific | 2021 |
| Ngln AS | Professional & scientific | 2023 |
| NGP Consulting AS | Professional & scientific | 2025 |
| NGP Holding AS | | 2025 |
| NGP Prosjekt 4 AS | Real estate | 2026 |
| NGP Prosjekt 5 AS | Real estate | 2026 |
| NGP Prosjekt 6 AS | Real estate | 2026 |
| NGP Prosjekt 7 AS | Real estate | 2026 |
| NGP Prosjekt 8 AS | Real estate | 2026 |
| Nhack Acceleration I AS | | 2017 |
| Nhack AS | Professional & scientific | 2017 |
| NHH Investment AS | Wholesale & retail | 2012 |
| NHP Alna AS | Professional & scientific | 2008 |
| NHP Eiendom AS | Real estate | 2006 |
| NHP Klett AS | Real estate | 2019 |
| NHP Langhus AS | Real estate | 2013 |
| NHP Orkanger AS | Professional & scientific | 2018 |
| NHP Sør AS | Real estate | 2008 |
| NHR Invest AS | | 2025 |
| Ni + to AS | Wholesale & retail | 2005 |
| Nib Holding AS | | 2020 |
| Nickelsen Holding AS | | 2019 |
| Nico Cars AS | Wholesale & retail | 2020 |
| Nicoustic AS | Manufacturing | 2022 |
| Nidareid Invest AS | Real estate | 2011 |
| Nidarheim Eiendom AS | Real estate | 2021 |
| Nidarheim Holding AS | Real estate | 2021 |
| Nidarholm Invest AS | Real estate | 2007 |
| Nidaros - Eiendomsmegling Sentrum AS | Real estate | 2023 |
| Nidaros Apartments AS | Real estate | 2021 |
| Nidaros Auto AS | Hospitality | 2018 |
| Nidaros Autoverksted AS | Other services | 2024 |
| Nidaros Betong AS | Construction | 2022 |
| Nidaros Betong Holding AS | Construction | 2022 |
| Nidaros Betongsaging AS | Construction | 2025 |
| Nidaros BG Ix AS | Real estate | 2022 |
| Nidaros BG V AS | Real estate | 2021 |
| Nidaros Bilvask AS | Other services | 2024 |
| Nidaros Bilverksted AS | Other services | 2022 |
| Nidaros Bolig AS | Real estate | 2013 |
| Nidaros Boligutleie AS | Real estate | 2018 |
| Nidaros Brukt & Antikk AS | Wholesale & retail | 2020 |
| Nidaros Cageball AS | Real estate | 2010 |
| Nidaros Capital Management AS | Financial services | 2025 |
| Nidaros EIENDOM1 AS | Real estate | 2005 |
| Nidaros Eiendomsservice AS | Construction | 2018 |
| Nidaros Eiendomsutvikling AS | Real estate | 2016 |
| Nidaros Equity Fund AS | Financial services | 2025 |
| Nidaros Estate AS | Real estate | 2020 |
| Nidaros Event Da | Arts & recreation | 2020 |
| Nidaros Finans AS | | 2021 |
| Nidaros Fisk Og Fiskmat Ans | Manufacturing | 2003 |
| Nidaros Forvaltning AS | Real estate | 2020 |
| Nidaros Forvaltning Holding AS | Real estate | 2020 |
| Nidaros GG Xxi AS | Real estate | 2021 |
| Nidaros Glass Og Montasje AS | Construction | 2020 |
| Nidaros HN I AS | Real estate | 2022 |
| Nidaros HQ AS | Real estate | 2024 |
| Nidaros Invest AS | Real estate | 2008 |
| Nidaros IV I AS | Real estate | 2022 |
| Nidaros Juveler AS | Wholesale & retail | 2026 |