| Norheim 1G AS | Real estate | 2016 |
| Norheim Handelspark AS | Real estate | 2006 |
| Norheimsmarka 1 AS | Real estate | 2017 |
| Norheimsmarka 3 AS | Real estate | 2016 |
| Norheimsmarka 7 AS | Real estate | 2017 |
| Norheimsmarka 9 AS | Real estate | 2017 |
| Norland Graving AS | Construction | 2024 |
| Norovent AS | Construction | 1990 |
| Norox AS | Construction | 2013 |
| Norox Eiendom AS | Construction | 1985 |
| Norrøna Storkjøkken Haugesund AS | Wholesale & retail | 1992 |
| Norsk Bedriftshelsetjeneste AS | Health & social care | 1998 |
| Norsk Helsetjeneste AS | Health & social care | 2025 |
| Norsk Medikal A/S | Wholesale & retail | 1987 |
| Norsk Service Import AS | Wholesale & retail | 2001 |
| Norsk Sveise Sertifisering AS | Professional & scientific | 2003 |
| Norspan Gas Carriers AS | Transport & logistics | 1990 |
| Norspan LNG 16 AS | Transport & logistics | 2019 |
| Norspan LNG 19 AS | Transport & logistics | 2019 |
| Norspan LNG AS | Transport & logistics | 1999 |
| Norspan LNG II AS | Transport & logistics | 2000 |
| Norspan LNG III AS | Transport & logistics | 2004 |
| Norspan LNG IV AS | Transport & logistics | 2005 |
| Norspan LNG Ix AS | Transport & logistics | 2013 |
| Norspan LNG V AS | Transport & logistics | 2006 |
| Norspan LNG Vi AS | Transport & logistics | 2006 |
| Norspan LNG Vii AS | Transport & logistics | 2007 |
| Norspan LNG Viii AS | Transport & logistics | 2007 |
| Norspan LNG X AS | Transport & logistics | 2013 |
| Norspan LNG Xi AS | Transport & logistics | 2013 |
| Norspan LNG Xii AS | Transport & logistics | 2017 |
| Norspan LNG Xiii AS | Transport & logistics | 2017 |
| North Invent Norway AS | Manufacturing | 2005 |
| North Sea AS | Transport & logistics | 2017 |
| North Sea Container Line AS | Transport & logistics | 1998 |
| North Sea Corporation AS | Transport & logistics | 1998 |
| North Sea Holding AS | Transport & logistics | 2007 |
| North Sea Logistics AS | Transport & logistics | 2021 |
| North-Sea Crew Management AS | Transport & logistics | 2013 |
| North-Sea Management AS | Administrative & support | 1996 |
| Northernblue AS | Professional & scientific | 2025 |
| Nortron AS | Construction | 2014 |
| Norvest AS | Financial services | 1997 |
| Norwegian Hull Cleaning AS | Administrative & support | 2021 |
| Norwegian Offshore Wind AS | Administrative & support | 2009 |
| Norwegian Timber AS | Agriculture & fishing | 2024 |
| Norwegian Welding Service AS | Manufacturing | 2022 |
| Norz Rogaland AS | Wholesale & retail | 2022 |
| Notting Hill Eiendom AS | Real estate | 2018 |
| Nova Eiendom AS | Real estate | 1991 |
| Novaredlight AS | Other services | 2026 |
| NP Nordic Protection AS | Manufacturing | 1999 |
| Npsh Nordic Pumps Service Haugesund AS | Wholesale & retail | 2015 |
| Nrbv Invest AS | Construction | 2006 |
| NRH Eiendom AS | Real estate | 2022 |
| NRH Holding AS | Real estate | 2022 |
| Nsno Invest AS | Professional & scientific | 2021 |
| NTH Consult AS | Professional & scientific | 2009 |
| Nuheart AS | Professional & scientific | 2014 |
| NV Holding AS | Professional & scientific | 2005 |
| Nye Haraldsgaten 109 AS | Real estate | 2025 |
| Nye Haraldsgaten 165 AS | Real estate | 2016 |
| Nye Haugehus AS | Real estate | 2021 |
| Nye Haugehus Eiendom AS | Real estate | 2021 |
| Nye Maria Eksotisk Mat AS | Wholesale & retail | 2024 |
| Nye O a Knutsen AS | Real estate | 2016 |
| Nygaard Eiendom AS | Real estate | 1991 |
| Nygaard Fam Invest AS | | 2026 |
| Nygaard Trading AS | Wholesale & retail | 1996 |
| Nygård & Nygård Consulting AS | Health & social care | 2013 |
| Nygård & Nygård Eiendom AS | Real estate | 2022 |
| Nytt & Nyttig AS | Administrative & support | 1992 |
| Nyttig Norsk AS | Education | 2024 |
| Nyuubi Frequency Design AS | Administrative & support | 2022 |
| Næringsbygg Heiane AS | Real estate | 2008 |
| Nøtteliten Fam Barnehage Dvergene AS | Education | 2022 |
| Nøtteliten Fam Barnehage Skogstroll AS | Education | 2022 |
| Nøtteliten Fam Barnehage Smårips AS | Education | 2022 |
| Nøtteliten Fam Barnehage Trollungene AS | Education | 2022 |
| O a Holding AS | Financial services | 2005 |
| O I Frøyland Eiendom AS | Real estate | 1988 |
| O J Hanssen AS | Wholesale & retail | 1972 |
| O J Miljeteig AS | Construction | 1986 |
| O. Jentoft Holding AS | | 2019 |
| O.Lindberg Invest AS | Real estate | 2019 |
| O.R. Rag AS | Professional & scientific | 2026 |
| O.S Bygg AS | Construction | 2023 |
| Oa Tveit Holding AS | | 2014 |
| Oakeik AS | Wholesale & retail | 2021 |
| Oasen Eiendom AS | Real estate | 1996 |
| Obsidian Eiendom AS | Real estate | 2019 |
| Obsidian Holding AS | Professional & scientific | 2019 |
| Obsidian Insights AS | Professional & scientific | 2023 |
| Ocean Infinity (Norway) AS | Professional & scientific | 2015 |
| Ocean Investment AS | Professional & scientific | 2021 |
| Octagon Farm AS | | 2026 |
| Odd Inges Gull & Sølv AS | Wholesale & retail | 1988 |
| Oddvar Nordal AS | Professional & scientific | 2023 |
| Odland Holding AS | | 2025 |
| Odt Invest AS | | 2006 |