| Narvikkiropraktoren AS | Health & social care | 2016 |
| Narviknett Ans | Information & communication | 1996 |
| Narvikregionen Næringsforening SA | Other services | 1991 |
| Naturgass Nord AS | Energy | 2004 |
| Navigare AS | Real estate | 1997 |
| NE Dronningensgt. 49 AS | Real estate | 2010 |
| NE Ofoten AS | Construction | 2022 |
| Neptun Invest AS | Arts & recreation | 2000 |
| Nettlærer AS | Education | 2024 |
| New Corridor AS | Transport & logistics | 2005 |
| Newco 1 Narvik AS | Real estate | 2022 |
| Newco 2 Narvik AS | Real estate | 2022 |
| Nilssen Music Da | Information & communication | 2014 |
| Njordhall AS | | 2021 |
| NO-8517 Invest AS | Real estate | 2018 |
| NO-9009 Holding AS | Real estate | 2014 |
| Nopo Narvik AS | Professional & scientific | 2007 |
| Nor-Trykk Narvik AS | Manufacturing | 2005 |
| Nor-Trykk Narvik Eiendom AS | Real estate | 2021 |
| Nord Norsk Spedisjon AS | Transport & logistics | 1988 |
| Nordaksen Eiendom AS | Real estate | 2026 |
| Nordbakk Eiendom AS | Real estate | 2025 |
| Nordfra Invest AS | | 2022 |
| Nordic Hydro AS | Energy | 2015 |
| Nordic Hydro Holding AS | Energy | 2015 |
| Nordic Power AS | Energy | 2014 |
| Nordic Power Torsnes AS | Energy | 2009 |
| Nordic Wood Products AS | Wholesale & retail | 2003 |
| Nordkraft AS | Energy | 2004 |
| Nordkraft Energidrift AS | Energy | 2015 |
| Nordkraft Industrinett AS | Energy | 2021 |
| Nordkraft Invest AS | Energy | 2022 |
| Nordkraft Magasin AS | Energy | 1978 |
| Nordkraft Nordavind Da | Professional & scientific | 2019 |
| Nordkraft Prosjekt AS | Energy | 2003 |
| Nordlys Eiendom Narvik AS | | 2025 |
| Nordmoveien 9 Bjerkvik AS | Real estate | 2000 |
| Nordnes Narvik AS | Wholesale & retail | 2007 |
| Nordopplevelser AS | Arts & recreation | 2012 |
| Nordscale Operations AS | Information & communication | 2026 |
| Nordthrust AS | | 2023 |
| Norinnova Narvik AS | Information & communication | 2018 |
| Norms AS | Agriculture & fishing | 2021 |
| Norsk Miljøservice Nord AS | Wholesale & retail | 2024 |
| North Circulare AS | Real estate | 2016 |
| North Maritime AS | Professional & scientific | 2017 |
| Notabene Engros AS | Wholesale & retail | 1991 |
| NR7 Holding AS | Construction | 2018 |
| Nscale DC Holdings Kvandal North AS | Information & communication | 2026 |
| Nscale DC Kvandal North AS | Information & communication | 2026 |
| Nscale Gpu Holdings Kvandal North AS | Information & communication | 2026 |
| Nscale Gpu Kvandal North AS | Information & communication | 2026 |
| Nscale Land Kvandal South AS | Information & communication | 2026 |
| Nscale Norway AS | Real estate | 2023 |
| Nscale Norway DC Da | Information & communication | 2025 |
| Nscale Norway Gpu Da | Information & communication | 2025 |
| Nscale Site 1 AS | Professional & scientific | 2024 |
| Nscale Site 2 AS | Professional & scientific | 2024 |
| Nscale Site 3 AS | Professional & scientific | 2024 |
| Nscale Site 4 AS | Real estate | 2022 |
| Nscale Site 5 AS | Professional & scientific | 2024 |
| Nscale Site 6 AS | Professional & scientific | 2024 |
| Nscla Explorer AS | Administrative & support | 2024 |
| Ntvr AS | Professional & scientific | 2017 |
| Nye PCN AS | | 2026 |
| Nyfly Service Da | Construction | 2004 |
| Nystad AS | Wholesale & retail | 2007 |
| Nystad Eiendom AS | Real estate | 2007 |
| Nystad Fritid AS | Real estate | 2025 |
| Nyva AS | Professional & scientific | 2019 |
| Næss Sjømat AS | Wholesale & retail | 2012 |
| O. Alm Holding AS | | 2017 |
| Oasen Narvik AS | Other services | 2003 |
| Odd Fellow Huset Narvik AS | Real estate | 1983 |
| Ofotech AS | Manufacturing | 2016 |
| Ofoten Fotklinikk AS | Health & social care | 2021 |
| Ofoten Mek AS | Manufacturing | 2019 |
| Ofoten Rør AS | Construction | 1993 |
| Ofoten Suspension Lab AS | Other services | 2026 |
| Ofoten Takst AS | Professional & scientific | 1990 |
| Ofoten Takstforretning Holding AS | Professional & scientific | 2020 |
| Ofoten Transport AS | Transport & logistics | 2018 |
| Ofotpizza AS | Hospitality | 2000 |
| Old Trafford Holding AS | | 2017 |
| Ole Liljebakk AS | Construction | 2001 |
| Olsen Investment AS | Real estate | 2018 |
| Omi Trans AS | Administrative & support | 2020 |
| Opdal AS | | 2021 |
| Optimal Finans AS | Administrative & support | 2017 |
| Ornes Eiendom AS | Real estate | 1996 |
| Orneshaugen Utleie AS | Real estate | 2004 |
| Othisi AS | Real estate | 2017 |
| Ottars Gate 1 AS | Construction | 2011 |
| Outdoor Environment Technology AS | Professional & scientific | 2009 |
| Outdoor Productions AS | Information & communication | 2023 |
| Overia Interiør AS | Wholesale & retail | 2011 |
| P Holding AS | Real estate | 2016 |
| P-H Invest AS | | 2023 |
| P.Bones AS | Financial services | 2007 |
| Paakola Conveyors OY | Wholesale & retail | 2001 |