| Nami Sushi AS | Hospitality | 2020 |
| Nemus Nesbru AS | Health & social care | 2016 |
| Neotech Norge AS | Professional & scientific | 2025 |
| Nesbru 75 AS | Hospitality | 2025 |
| Nesbru Auto AS | Wholesale & retail | 2022 |
| Nesbru Consult Ltd Nuf | Professional & scientific | 2008 |
| Nesbru Detalj AS | Real estate | 2011 |
| Nesbru Eiendom AS | | 2011 |
| Nesbru Kebab House AS | Hospitality | 2025 |
| Nesbru Legesenter AS | Health & social care | 2015 |
| Nesbru Lyd Og Lys AS | Administrative & support | 2023 |
| Nesbru Sushi AS | Hospitality | 2013 |
| Nesbru Sushi Wook Restaurant AS | Hospitality | 2023 |
| Nesbru Tilhenger Service AS | Wholesale & retail | 2011 |
| Nesbru Trailer & Service AS | Wholesale & retail | 1989 |
| Nesbru Trim & Helse AS | Arts & recreation | 1994 |
| Nesbruklinikken AS | Health & social care | 2003 |
| Nesbrusushi AS | Hospitality | 2026 |
| Nesbruvarebilutleie AS | Administrative & support | 2019 |
| Nesbukta 6 Hjemmel AS | Households | 2017 |
| Nesbukta Trading AS | Wholesale & retail | 2012 |
| Neslia Holding AS | Financial services | 1989 |
| New Voting Technology Consulting AS | Professional & scientific | 2015 |
| Nicom AS | Wholesale & retail | 1988 |
| Nidaros Capital AS | | 2020 |
| Nils Axel Hveding AS | Real estate | 1998 |
| Niro Consulting AS | Information & communication | 2024 |
| Nisco AS | Wholesale & retail | 2014 |
| No Free Lunsj Holding AS | | 2020 |
| Nobel Resource Group AS | Education | 1998 |
| Nor Ace AS | Wholesale & retail | 2020 |
| Noraqua AS | Professional & scientific | 2022 |
| Nordic Consepts Group AS | Hospitality | 2020 |
| Nordic Green AS | Wholesale & retail | 2025 |
| Nordic Spaces AS | Real estate | 2017 |
| Nordic Sportsmaster AS | Wholesale & retail | 2015 |
| Norex AS | Wholesale & retail | 1991 |
| Norra Bygg AS | Real estate | 2026 |
| Norrby Holding AS | | 2020 |
| Norsk Minilager Da | Real estate | 2000 |
| Norsk Rørteknikk AS | Construction | 2011 |
| North Creek Invest AS | Financial services | 2018 |
| Norum Invest AS | | 2018 |
| Norvigs AS | | 2026 |
| Novavia Holding AS | | 2026 |
| Ntention AS | Professional & scientific | 2016 |
| Nye Holmen Slipp Eiendom AS | Real estate | 2018 |
| Nye Ksu Utvikling AS | Real estate | 2024 |
| Nye Nesbru Kebab AS | Hospitality | 2022 |
| O Poulsen Consult AS | Real estate | 2024 |
| O Poulsen Holding AS | Real estate | 2024 |
| Octano AS | Professional & scientific | 2013 |
| Odalen AS | Real estate | 2023 |
| Oddsten Consulting AS | Professional & scientific | 2023 |
| Odga Holding AS | | 2023 |
| Odina AS | Wholesale & retail | 2013 |
| Okie AS | | 2019 |
| Olav K Brekke AS | Real estate | 2001 |
| Olberg Eide Holding AS | Real estate | 2025 |
| Ole E Sørdahl AS | Professional & scientific | 1986 |
| Oli Holding AS | Real estate | 2005 |
| Olisatek AS | Professional & scientific | 2018 |
| Olitar AS | Professional & scientific | 2023 |
| Oliver Og Farfar AS | | 2017 |
| Olivia Stone AS | Wholesale & retail | 2020 |
| Omn AS | | 2024 |
| Open AS | Professional & scientific | 2005 |
| Oppkomme AS | Construction | 2013 |
| Oslo Asset Management Holding AS | Administrative & support | 2005 |
| Oxs Holding AS | Health & social care | 2005 |
| Ozon Kube AS | Construction | 2022 |
| P. Five Holding AS | Wholesale & retail | 2017 |
| P. Wiksén AS | Professional & scientific | 2005 |
| Paera AS | Real estate | 2005 |
| Panthera Capital AS | | 2022 |
| Parasollspesialisten AS | Wholesale & retail | 2023 |
| Pasientporten AS | Information & communication | 2026 |
| Patentprodukter AS | Wholesale & retail | 2023 |
| Patinor AS | Professional & scientific | 1993 |
| Paya Solutions AS | Health & social care | 2021 |
| Paytech Commercial AS | Professional & scientific | 2012 |
| Paytech Consulting AS | Information & communication | 2003 |
| Paytech Group AS | Professional & scientific | 2012 |
| Paytech Neo AS | Information & communication | 2018 |
| PC Stenstadvold Holding AS | | 2021 |
| Pemw Holding AS | | 2020 |
| Petrica AS | Mining & quarrying | 2013 |
| Petroleum Services Holding AS | | 2000 |
| Pettco AS | Wholesale & retail | 2011 |
| Pettco Service AS | Manufacturing | 2025 |
| Petter N Haug AS | Financial services | 2005 |
| Pho & Wok AS | Hospitality | 2012 |
| Pinadø Holding AS | Education | 2009 |
| Pinadø Nuf | Arts & recreation | 2003 |
| Pinseeker AS | | 2018 |
| Pir AS | Real estate | 2005 |
| Pir Holding AS | Real estate | 2005 |
| Piro Eiendom AS | Real estate | 2018 |
| Piro Holding AS | Real estate | 2016 |
| Placht Holding AS | Real estate | 2018 |