| Myrfaret AS | Real estate | 2025 |
| Mysen Panorama AS | Real estate | 2016 |
| Marina AS | Wholesale & retail | 1978 |
| Nagel Invest AS | | 2023 |
| Nails by Sakar Jangir AS | Other services | 2023 |
| Nardo AS | Real estate | 2003 |
| Ncons AS | Information & communication | 2019 |
| Nelfi AS | Professional & scientific | 2023 |
| Nellon Labs AS | Professional & scientific | 2021 |
| Nemsesk AS | Professional & scientific | 2018 |
| Nesodden Kabel-Tv AS | Information & communication | 1981 |
| Ness & Fludal Advokatfirma AS | Professional & scientific | 2023 |
| Nest Consulting AS | Information & communication | 2022 |
| Next Generation AS | | 2021 |
| Next Level Holding AS | Real estate | 2016 |
| NF Holding AS | Construction | 2023 |
| NF Utleie AS | Administrative & support | 2024 |
| Nfe Topco AS | Construction | 2023 |
| NFM AS | Wholesale & retail | 2019 |
| NFM Group AS | Wholesale & retail | 2015 |
| NFM Technology AS | Manufacturing | 2004 |
| Nihil Capital AS | | 2026 |
| Nii AS | Transport & logistics | 2016 |
| Nineofive AS | Information & communication | 2026 |
| NITTON93 Inredningar AB Nuf | Wholesale & retail | 2026 |
| NITTON93 Norge AS | Professional & scientific | 2014 |
| No Xcuse AS | Professional & scientific | 2015 |
| Noble Trading House AS | Wholesale & retail | 2013 |
| Nomi Restaurant AS | Hospitality | 2025 |
| Nook & Nest AS | Wholesale & retail | 2026 |
| Noor Edelmetall AS | Wholesale & retail | 2015 |
| Nor Autospa AS | Other services | 2011 |
| Nor Development Group AS | Wholesale & retail | 2022 |
| Nor Trapp Oslo Follo AS | Construction | 1993 |
| Nor-Atlantic AS | Professional & scientific | 1965 |
| Nor-El Ans | Construction | 2001 |
| Nordby Bilverksted AS | Other services | 2018 |
| Nordby Eiendom AS | Manufacturing | 1998 |
| Nordbyveien 16 AS | Real estate | 2016 |
| Nordbyveien 21 Ski AS | Real estate | 2007 |
| Nordbyveien 27 Follo AS | Real estate | 2020 |
| Nordbyveien Mat AS | Wholesale & retail | 2012 |
| Nordic Business Consulting AS | Professional & scientific | 2005 |
| Nordic C-Management AS | Professional & scientific | 2019 |
| Nordic Mro AS | Construction | 2013 |
| Nordic Project Consulting AS | Professional & scientific | 2005 |
| Nordic Smartlight AS | Wholesale & retail | 2016 |
| Nordic Well AS | Other services | 2018 |
| Nordique Total Management AS | Professional & scientific | 2026 |
| Nordre Finstad Gårdstun AS | Real estate | 2018 |
| Nordre Finstad Sykehustomt AS | Real estate | 2018 |
| Nordre Finstad Utbygging III AS | Real estate | 2007 |
| Nordre Follo Eiendomsutvikling AS | Real estate | 2025 |
| Nordre Follo Elektriske AS | Construction | 2023 |
| Nordre Follo Frisør AS | Other services | 2020 |
| Nordre Follo Glass AS | Construction | 2004 |
| Nordre Follo Maling Og Overflateteknikk AS | Construction | 2022 |
| Nordre Follo Renhold AS | Administrative & support | 2024 |
| Nordre Follo Rørservice AS | Construction | 2023 |
| Nordre Follo VVS AS | Construction | 2023 |
| Norgren AS | Wholesale & retail | 1963 |
| Nori Byggeservice AS | Construction | 2021 |
| Norsegear AS | Wholesale & retail | 2018 |
| Norsk Anleggs- Og Sikkerhetsopplæring AS | Education | 2014 |
| Norsk Diamant Depot AS | Wholesale & retail | 2016 |
| Norsk Edelmetall AS | Wholesale & retail | 2017 |
| Norsk Edelmetallraffinering AS | Wholesale & retail | 2010 |
| Norsk Konferanseteknikk Ans | | 1990 |
| Norsk Landbruks Service AS | Real estate | 1986 |
| Norsk Naturfotofestival AS | Arts & recreation | 2013 |
| Norsk Trafikksikring AS | Transport & logistics | 2017 |
| Norsk Trafikksikring Holding AS | Education | 2014 |
| Norsk Tørrisblåsing AS | Administrative & support | 2022 |
| Norski AS | Hospitality | 1995 |
| North Light Trading AS | Professional & scientific | 2021 |
| Norwegian Drug Control and Drug Discovery Institute (Ndcddi) AS | Wholesale & retail | 1991 |
| Norwegian Ice Design Da | Administrative & support | 2024 |
| Notus Energy Norway AS | | 2019 |
| Nova Taxi AS | Transport & logistics | 2026 |
| NR Group AS | Wholesale & retail | 2012 |
| NS4 Invest | | 2014 |
| Numeros AS | Professional & scientific | 2021 |
| Nyborg Invest AS | Administrative & support | 1998 |
| Nye Banda Follo AS | Wholesale & retail | 2023 |
| Nye BT4 Eiendom AS | Real estate | 2025 |
| Nye BT6 Eiendom AS | Real estate | 2007 |
| Nye Idrettsveien 9 AS | Real estate | 2021 |
| Nye Lotus House AS | Hospitality | 2018 |
| Nye Nordre Finstad Utbygging I AS | Real estate | 2025 |
| Nygårdsveien 20A AS | Real estate | 2012 |
| Nygårdsveien 20B AS | Real estate | 2021 |
| Nygårdsveien 26 AS | Real estate | 2014 |
| Nygårdsveien 28 AS | Real estate | 2014 |
| Nygårdsveien 49 AS | Real estate | 2011 |
| Nygårdsveien 51 AS | Real estate | 2008 |
| Nygårdsveien 57 AS | Real estate | 2018 |
| Nygårdsveien 59 AS | Real estate | 2019 |
| Nygårdsveien 67 AS | Real estate | 2016 |
| Nygårdsveien 6B AS | Real estate | 2019 |
| Nåløyet AS | Wholesale & retail | 2016 |