| Nova Sol AS | | 2021 |
| Nova Ventures AS | Professional & scientific | 2022 |
| Novagroup International AS | | 1985 |
| Novarra AS | Real estate | 2025 |
| Novatech AS | Information & communication | 2022 |
| Novatech Consulting AS | Professional & scientific | 2008 |
| Novatras Group AS | | 2025 |
| Now Norway AS | Wholesale & retail | 2013 |
| Nowsco Well Services GmbH | Mining & quarrying | 1997 |
| Nowu AS | | 2025 |
| NPB Invest AS | Health & social care | 2023 |
| NPX Holding AS | Financial services | 2017 |
| NRH Vadsø AS | Real estate | 2003 |
| Nro Consulting AS | | 2024 |
| Nrwy Raw AS | Professional & scientific | 2014 |
| Nso AS | Real estate | 2005 |
| Nte 2 AS | Professional & scientific | 2025 |
| NTG II AS | Real estate | 2025 |
| NTM Mip Invest AS | | 2021 |
| Nu Drone Tech AS | Professional & scientific | 2025 |
| Nucase AS | Information & communication | 2022 |
| Numbers AS | Professional & scientific | 2017 |
| Nuna Consulting AS | Information & communication | 2025 |
| Nuna Invest AS | | 2014 |
| Nunataq Holding AS | Construction | 2014 |
| Nunia AS | Professional & scientific | 2014 |
| Nupiens AS | Information & communication | 2024 |
| Nut AS | Information & communication | 2009 |
| Nuten AS | Real estate | 2024 |
| Nver AS | Energy | 2019 |
| Nvrmd AS | Manufacturing | 2020 |
| Ny Hage AS | Construction | 2024 |
| Ny Olavskleiv Invest AS | Real estate | 1996 |
| Nybo VR AS | Information & communication | 2024 |
| Nybrott AS | | 2018 |
| Nye Areal-Eiendom Holding AS | Real estate | 2021 |
| Nye Bjørnøygaten AS | Real estate | 2023 |
| Nye Boliger Stavanger AS | Real estate | 2018 |
| Nye Egenes Idrettsbarnehage AS | Education | 2019 |
| Nye Focus Trafikkskole AS | Education | 2025 |
| Nye Hillevågsveien 24 AS | Real estate | 2014 |
| Nye Jette Frisør AS | Other services | 2018 |
| Nye Kirkegaten 19/21 AS | Real estate | 2026 |
| Nye Myhregaarden Hotel AS | Real estate | 2015 |
| Nye Rom AS | Wholesale & retail | 2011 |
| Nye Saa Eiendom AS | Real estate | 2019 |
| Nye Sandco AS | Professional & scientific | 2018 |
| Nye Sgaa Eiendom AS | Education | 2019 |
| Nyera AS | | 2021 |
| Nygaard AS | Administrative & support | 1991 |
| Nygaard Investing AS | Professional & scientific | 2021 |
| Nygaard Maskin AS | Construction | 2023 |
| Nygaten 14 Eiendom AS | Real estate | 2019 |
| Nygaten 2 AS | Real estate | 2020 |
| Nygaten I AS | Real estate | 2009 |
| Nygård Næringsutvikling AS | Real estate | 2008 |
| Nykapp AS | Professional & scientific | 2015 |
| Nykirkebakken Eiendom AS | Real estate | 2013 |
| Nylenda Music SA | Arts & recreation | 2018 |
| Nylunds Bilelektrisk AS | Wholesale & retail | 1989 |
| Nyma AS | Construction | 2012 |
| Nyou AS | Professional & scientific | 2021 |
| Nysnø Klimainvesteringer AS | Financial services | 2017 |
| Nystad Management AS | Administrative & support | 2001 |
| Nystrøm Invest AS | Financial services | 2007 |
| Nyt Hud Og Fotklinikk AS | Other services | 2015 |
| Nytenk AS | Hospitality | 2025 |
| Nytorget 1 AS | Real estate | 2015 |
| Nytorget 14 AS | Real estate | 2009 |
| Nytorget 8 AS | Real estate | 2022 |
| Nytorget Legesenter AS | Health & social care | 2012 |
| Nytro AS | Financial services | 2018 |
| Nyttsyn AS | Health & social care | 2025 |
| Norsk Filmtrykk A/S | Manufacturing | 1988 |
| Nådlandskvartalet AS | Real estate | 1996 |
| Nåsi AS | Real estate | 2006 |
| Næringslivets Hus AS | Real estate | 2026 |
| Næsheim Auto Senter AS | Real estate | 1994 |
| Næss Investering AS | Financial services | 2005 |
| Nøkkelpersonell AS | Administrative & support | 1996 |
| Nøste Holding AS | | 2025 |
| Nøtteknekker Holding AS | Professional & scientific | 2024 |
| Nøysøm AS | Education | 2025 |
| O & G Consultants B.V. Nuf | Professional & scientific | 2014 |
| O H Meling & Co AS | Transport & logistics | 1992 |
| O Olsen & Co AS | Real estate | 1941 |
| O Torjussen & Sønner AS | Construction | 1997 |
| O&K Invest AS | Real estate | 2009 |
| O&M Invest AS | | 2021 |
| O. S. Kristoffersen Invest AS | Real estate | 2005 |
| O.H. Meling Management AS | Transport & logistics | 2017 |
| O.H. Meling Tankers KS | Transport & logistics | 2006 |
| O22 Holding AS | | 2021 |
| O2PUS AS | Real estate | 2017 |
| Oah AS | | 2024 |
| Oak Holding AS | Real estate | 2006 |
| Oakberry Vest AS | Hospitality | 2025 |
| Oalsgata 1 AS | Real estate | 2007 |
| Oann AS | Financial services | 2005 |
| Oap Holding AS | | 2023 |