| Murmester Haldor Meling AS | Construction | 1981 |
| Myq AS | Professional & scientific | 2025 |
| Mågamad AS | Professional & scientific | 2025 |
| N Sea Pro AS | Real estate | 2022 |
| Naustvik Slipp & Båtbyggeri AS | Manufacturing | 2015 |
| Nedre Vågen 35 AS | Real estate | 2021 |
| Nesø Holding AS | | 2020 |
| Newport Energy AS | Professional & scientific | 2023 |
| NHP Holding AS | | 2024 |
| Nila Noor AS | Professional & scientific | 2024 |
| Nipet AS | Real estate | 2011 |
| No Limits Sport & Fitness AS | Arts & recreation | 2019 |
| Nopava O S Lunde Rustbeskyttelse AS | Other services | 2007 |
| Nor Robotics AS | Wholesale & retail | 2020 |
| Nor-Service Technology AS | Professional & scientific | 2013 |
| Nordbotns Holding AS | Financial services | 2018 |
| Nordbø Bygg AS | Construction | 2013 |
| Nordic Bag End AS | Wholesale & retail | 2023 |
| Nordic Terrain Academy AS | Education | 2019 |
| Nordsaga AS | Manufacturing | 2026 |
| Nordsjø Energi AS | Energy | 2022 |
| Normeco AS | Information & communication | 2007 |
| Norsta AS | Transport & logistics | 2024 |
| North Sea Properties AS | Real estate | 2014 |
| North Sea Property AS | Real estate | 2002 |
| Northbay International AS | Professional & scientific | 2013 |
| Norwegian Energy Service AS | Professional & scientific | 2013 |
| Norwegian Seafarming AS | Agriculture & fishing | 2020 |
| Norwegian Seafarming Egersund AS | Agriculture & fishing | 2021 |
| Nyasto AS | | 2020 |
| Nyd AS | | 2026 |
| Oalsgata 10 AS | Real estate | 1983 |
| Oase Fontener AS | Wholesale & retail | 1987 |
| Obh Invest AS | Real estate | 2010 |
| Odar Invest AS | | 2006 |
| Oddvar Meling AS | Construction | 1998 |
| Odin Eye AS | Agriculture & fishing | 2026 |
| Ofr Holding AS | | 2024 |
| Ole Terje Strøm Invest AS | | 2005 |
| Olje Invest AS | Professional & scientific | 2016 |
| Optimal Sales Solutions AS | Professional & scientific | 2025 |
| Osberg Holding AS | | 2025 |
| Osmundsen Invest AS | Real estate | 2005 |
| Paradiso La Manga AS | Professional & scientific | 2001 |
| Part AS | Professional & scientific | 2003 |
| Pej Invest AS | Financial services | 2015 |
| Pepitocreations AS | Wholesale & retail | 2024 |
| Pepitostore AS | Wholesale & retail | 2024 |
| Permaplants AS | Wholesale & retail | 2025 |
| Perpetuum AS | Real estate | 1998 |
| Perseus AS | Professional & scientific | 2021 |
| Petrodata AS | Mining & quarrying | 2015 |
| Pib Invest AS | Real estate | 2006 |
| Pipequip AS | Wholesale & retail | 2003 |
| Plunge AS | Professional & scientific | 2025 |
| PML Holding AS | Financial services | 2010 |
| Polsevev AS | Information & communication | 2026 |
| Polyvest AS | Information & communication | 2005 |
| Pontium AS | Professional & scientific | 2013 |
| Posuva AS | Professional & scientific | 2010 |
| Power Business AS | Information & communication | 2025 |
| Powerpal Invest AS | Professional & scientific | 2022 |
| Powerpal IP AS | Professional & scientific | 2022 |
| Premiere Eiendom AS | Wholesale & retail | 2005 |
| Premiere Holding AS | Wholesale & retail | 2005 |
| Premiere Produkter AS | Wholesale & retail | 1981 |
| Professional Service Team AS | | 2003 |
| Proffshore AS | Real estate | 1986 |
| Propcon AS | | 2021 |
| Proram AS | Professional & scientific | 2020 |
| Prosona AS | | 2005 |
| PRS Gruppen AS | Wholesale & retail | 2016 |
| Qmarkå Eiendom BHG AS | Real estate | 2005 |
| Qmarkå Fus Barnehage AS | Education | 2018 |
| Quaestor Forvaltning AS | | 2017 |
| Queenie Stewart Holding AS | | 2020 |
| R3BEL Invest AS | | 2018 |
| Raga Invest AS | Real estate | 2019 |
| Rakkfallan AS | Professional & scientific | 2024 |
| Ramcon AS | Professional & scientific | 2016 |
| Ramsen AS | Financial services | 2012 |
| Ramsviktysvær AS | Real estate | 2021 |
| Ramsør AS | | 2024 |
| Randabergveien 100 Eiendom AS | | 2024 |
| Randy AS | Other services | 2020 |
| React AS | Administrative & support | 2012 |
| Rebel Fitness AS | Education | 2023 |
| Rednex AS | Financial services | 2005 |
| Refseth Invest AS | Professional & scientific | 2007 |
| Rein Investment AS | Real estate | 2015 |
| Rekkevidde Holding AS | | 2024 |
| Rekraft AS | Health & social care | 2026 |
| Rep.Mann Maskin AS | Real estate | 2010 |
| Reserveverten Da | Administrative & support | 2015 |
| Rico AS | Professional & scientific | 1994 |
| Rijo Holding AS | Real estate | 2016 |
| RJ Investment AS | Information & communication | 2017 |
| RL Consult AS | Agriculture & fishing | 2023 |
| RM Eiendomsutvikling AS | Real estate | 2006 |
| RN74 Invest AS | | 2026 |