| Nelmil AS | | 2024 |
| Neo Capital AS | | 2026 |
| Nerdalytics AS | Information & communication | 2022 |
| Nesøya Invest AS | Financial services | 1980 |
| Nettpedagogene Ans | Information & communication | 2000 |
| Never Grow Up AS | | 2022 |
| New Id Holding AS | Information & communication | 2019 |
| New Odden Invest AS | | 2023 |
| Newton Heath Holding AS | Professional & scientific | 2012 |
| Nfcu Da | Information & communication | 2014 |
| NHH AS | | 2024 |
| Nicebbing AS | | 2021 |
| Nicolist AS | | 2021 |
| Nicomax AS | | 2005 |
| Ninjo AS | Administrative & support | 2016 |
| Nira Dent AS | Health & social care | 2026 |
| Nira Holding AS | Health & social care | 2021 |
| Niro Prosjekt AS | Real estate | 2007 |
| Nispe 033 Holding AS | | 2023 |
| Nodelive AS | Education | 2026 |
| Nor Shipconsult AS | Professional & scientific | 2013 |
| Norbeluk AS | Professional & scientific | 2020 |
| Norboat AS | Administrative & support | 1980 |
| Norboat Holding AS | Administrative & support | 1971 |
| Norboat Lokalt AS | Administrative & support | 1996 |
| Norcubic AS | Professional & scientific | 2021 |
| Nord Designs AS | Wholesale & retail | 2008 |
| Nord Maling Tjenste AS | Construction | 2026 |
| Nordconcept AS | Wholesale & retail | 2022 |
| Nordholmen AS | Financial services | 2017 |
| Nordic Enterprise AS | Professional & scientific | 1985 |
| Nordic Fish AS | Wholesale & retail | 2017 |
| Nordic Lyfe AS | | 2017 |
| Nordic Studios AS | Wholesale & retail | 2024 |
| Nordic Visions Nuf | Wholesale & retail | 2009 |
| Nordisk Bygg Montering AS | Professional & scientific | 2023 |
| Nordisk Byggutvikling AS | Real estate | 2026 |
| Nordlys Renovering AS | Construction | 2026 |
| Norge Bygg AS | Construction | 2019 |
| Noria 261001 Ltd Nuf | Professional & scientific | 2026 |
| Norkurs AS | Education | 2013 |
| Norr Safe AS | Construction | 2015 |
| Norrøna Marina AS | Real estate | 2007 |
| Norrøna Marina Holding AS | Real estate | 2021 |
| Norsk Hundeutstyr AS | Wholesale & retail | 2026 |
| Norsk Labex AS | Wholesale & retail | 1990 |
| North Trade Analysis & Information Ans | | 1992 |
| Nortus Group AS | Professional & scientific | 2014 |
| Norwadi AS | Other services | 2026 |
| Norway Propco AS | | 2023 |
| Norwegian Custom Media Solution AS | Wholesale & retail | 2003 |
| Noticeit AS | Information & communication | 2019 |
| Notland AS | | 2023 |
| Nullkryss AS | Administrative & support | 2000 |
| Nuovo Pignone International S.R.L Nuf | Professional & scientific | 1995 |
| Nutheim Invest AS | | 2023 |
| Ny Jobb Portal AS | Information & communication | 2020 |
| Nyberg Invest AS | Real estate | 2022 |
| Nye Hjem AS | Real estate | 2023 |
| Nynett Norge AS | Information & communication | 2007 |
| Nystedt Holding AS | Health & social care | 2005 |
| Nødvendig AS | Professional & scientific | 2023 |
| Nødvendig Entreprenør AS | Construction | 2018 |
| Nødvendig Holding AS | Construction | 2023 |
| O. Müller Invest AS | | 2025 |
| Oakside Holding AS | Education | 2020 |
| Occasio AS | | 2009 |
| Ocrg Holding AS | Financial services | 2005 |
| Oddenskogen Barnehage SA | Education | 1995 |
| Oddworks II AS | Professional & scientific | 2018 |
| Oea Eiendomsinvest AS | Real estate | 2013 |
| Oj Productions AS | Professional & scientific | 2014 |
| Okiy AS | Transport & logistics | 2019 |
| Onsight Invest AS | | 2020 |
| Opsiana AS | Professional & scientific | 2022 |
| Oslo Urologiske Klinikk AS | Health & social care | 2023 |
| P Lødøen AS | Professional & scientific | 2002 |
| Paddy AS | | 2020 |
| Paj Holding AS | | 2023 |
| Palifa AS | Real estate | 2003 |
| Palma Da | Wholesale & retail | 2003 |
| Pamfilius Holding AS | | 2022 |
| Pangea Accelerator AS | Professional & scientific | 2017 |
| Pars Holding AS | Construction | 2020 |
| Partyland Online AS | Wholesale & retail | 2016 |
| PDC AS | Professional & scientific | 2025 |
| PDR Capital AS | | 2025 |
| Peik Holding AS | Real estate | 2017 |
| Peso Invest AS | Professional & scientific | 2015 |
| Petanquekulen Da | Wholesale & retail | 2009 |
| Petersen Brothers Da | Administrative & support | 2002 |
| Petra Utvikling AS | Real estate | 2019 |
| Pewe Invest AS | Professional & scientific | 2014 |
| Pewe Prosjekt AS | | 2025 |
| PFF Holding AS | Real estate | 2020 |
| Pg-Holding AS | Financial services | 2005 |
| PH Consulting AS | Real estate | 2017 |
| Piantino Invest AS | | 2022 |
| Picm AS | Information & communication | 2012 |
| Pioneer Holding AS | | 2026 |