| Nils Kristoffersen AS | Construction | 1970 |
| Nimima Invest AS | Real estate | 2020 |
| Nina C. Brembo Holding AS | | 2023 |
| Nisc AS | Real estate | 2017 |
| Nitschke Advokater AS | Professional & scientific | 2019 |
| Nor Akva Da | Professional & scientific | 2023 |
| Nor Rock Import Ans | Wholesale & retail | 2011 |
| Nordavind AS | | 2024 |
| Norderhaug Service AS | Administrative & support | 2025 |
| Nordic Hotel Logistics AB Nuf | Wholesale & retail | 2023 |
| Nordic Hotel Support AS | Wholesale & retail | 2003 |
| Nordic Life AS | Professional & scientific | 2002 |
| Norsk Fotballakademi Da | Education | 2005 |
| Norwegian Ship Sales AS | Transport & logistics | 2000 |
| Nosytten NO17 AS | Professional & scientific | 2021 |
| Novasli AS | Transport & logistics | 2008 |
| Novo Capital AS | Real estate | 2019 |
| NPS Invest AS | | 2022 |
| Nuko AS | | 2013 |
| Nye Bærum Dental Da | Manufacturing | 2011 |
| Nyløkken Modul Og Brakke AS | Wholesale & retail | 1998 |
| Nyumba AS | Real estate | 2018 |
| Nøysom Invest AS | | 2021 |
| Object Production AS | Information & communication | 2002 |
| Offbeat Entertainment Da | Arts & recreation | 2021 |
| Ofm Holding AS | Information & communication | 2019 |
| Ohn 707 Holding AS | | 2023 |
| Ojah Invest AS | Financial services | 2014 |
| Olsen & Kristensen Ltd Nuf | Real estate | 2012 |
| Omizan AS | Information & communication | 2023 |
| Omland Investments AS | Real estate | 2010 |
| Oppogfram AS | Education | 2026 |
| Oslo Data Consulting AS | Information & communication | 2021 |
| Oslomade AS | Wholesale & retail | 2017 |
| Otoryx AS | Health & social care | 1995 |
| Out of Bounds AS | | 2021 |
| Park Amusement Drift AS | Administrative & support | 2016 |
| Park Holding AS | Administrative & support | 2016 |
| PCB Holding AS | | 2024 |
| Pec-Holding AS | | 2024 |
| Pedro Consulting AS | Professional & scientific | 2008 |
| Pelime AS | Professional & scientific | 2020 |
| People Productions AS | Manufacturing | 2026 |
| Petek AS | Professional & scientific | 2011 |
| Pir - Proaktiv Innovasjonsrådgivning AS | Professional & scientific | 2024 |
| Piv Invest AS | Real estate | 2015 |
| Portarack AS | Professional & scientific | 2022 |
| Preco AS | Transport & logistics | 1989 |
| Prestholdt Invest AS | | 2025 |
| Prima Software AS | Information & communication | 2007 |
| Prinsensgate Eiendom AS | Real estate | 2003 |
| Printd AS | Professional & scientific | 2023 |
| Prosperator Invest AS | Real estate | 2018 |
| Psykiater Simona Hansen AS | Health & social care | 2025 |
| Qlogz AS | Information & communication | 2012 |
| R2-INVEST AS | | 2018 |
| Rabalder Capital AS | Real estate | 2021 |
| Rammeriet AS | Manufacturing | 1990 |
| Realfagsforlaget SA | Information & communication | 2017 |
| Recito AS | Professional & scientific | 2019 |
| Redning Norge AS | Transport & logistics | 2019 |
| Ree Eriksen Co. AS | Professional & scientific | 2017 |
| Refseth Consulting Ltd Nuf | Information & communication | 2008 |
| Regnskapspikene AS | Professional & scientific | 2009 |
| Reinsenn AS | | 2025 |
| Response AS | Information & communication | 2001 |
| Returverdi AS | Financial services | 2020 |
| Revilla Beauty & Reflexology Clinic AS | Other services | 2022 |
| RGT Investments AS | | 2026 |
| Ritschel AS | Professional & scientific | 2016 |
| Riwimato AS | | 2005 |
| Robsrud & Dean AS | Arts & recreation | 2012 |
| Root Node AS | Financial services | 2016 |
| Roots & Blues Joint AS | Professional & scientific | 2012 |
| Rorbua Eiendom AS | Real estate | 2020 |
| Rotor-Mech AS | Professional & scientific | 2022 |
| Rrobo AS | Financial services | 2016 |
| Rune Berge AS | Professional & scientific | 2026 |
| Rusken AS | Financial services | 2006 |
| S Korsgaard AS | Wholesale & retail | 2022 |
| S&C Norge AS | Hospitality | 2009 |
| S. M. N. Invest AS | | 2023 |
| Sandra Lyng AS | Arts & recreation | 2005 |
| Sannes Holding AS | | 2023 |
| Saxe Engineering AS | Professional & scientific | 2024 |
| Scheistrøen Invest AS | Real estate | 2007 |
| Schrei Design Ans | Professional & scientific | 2009 |
| Seaspection AS | Wholesale & retail | 2015 |
| Sebero AS | Information & communication | 2024 |
| Sebphi Eiendom AS | Real estate | 2014 |
| Seivallmoen Utvikling AS | Real estate | 2021 |
| Seljeholtet Veilag SA | Real estate | 2018 |
| Serif AS | Wholesale & retail | 1991 |
| Serof AS | Information & communication | 2013 |
| Sesi AS | Professional & scientific | 2021 |
| SH Vekst AS | | 2022 |
| Shashlik AS | Hospitality | 2019 |
| Shift Left 8 AS | | 2021 |
| Short Message System Communications AS | Information & communication | 1999 |
| Sibilla AS | Administrative & support | 2019 |