| Nordstrand Kulturskole AS | Education | 2006 |
| Norresource AS | Health & social care | 2018 |
| Norseboost Systems AS | Information & communication | 2025 |
| Northern Lights Group AS | Professional & scientific | 2012 |
| Northmedia AS | Information & communication | 2013 |
| Norway International AS | Professional & scientific | 2014 |
| Norwaycraft Group AS | Information & communication | 2022 |
| Norwegian Wine Agency AS | Wholesale & retail | 2017 |
| Novund AS | | 2020 |
| Nxtskin AS | Wholesale & retail | 2026 |
| Ny Bygg Og Transport AS | Construction | 2017 |
| Ny-Tek AS | Professional & scientific | 1999 |
| Nye Havsdalsvegen 63 AS | Real estate | 2025 |
| Næss Båtelektro Ans | Manufacturing | 1989 |
| Nøstvik Service AS | Construction | 2025 |
| Okane AS | Information & communication | 2026 |
| Okr Betongpumping AS | Transport & logistics | 2020 |
| OLS1 AS | | 2021 |
| Olsen-Holding AS | Financial services | 2016 |
| Olsrød Café AS | Hospitality | 2024 |
| Olsrød Optikk AS | Wholesale & retail | 2013 |
| Olsrød Park AS | Real estate | 1996 |
| Olsrød Park Frisør AS | Other services | 2021 |
| On-Pro Holding AS | | 2011 |
| Onpro AS | Administrative & support | 2020 |
| Onsite Services AS | Construction | 2018 |
| Optimal Drift AS | Administrative & support | 2024 |
| Organic AS | Professional & scientific | 2018 |
| Orgevo AS | Professional & scientific | 2012 |
| Oseberg Begravelsesbyrå AS | Other services | 2017 |
| Oseberg Computing AS | Professional & scientific | 2002 |
| P. Levik AS | Administrative & support | 2013 |
| Paalding AS | | 2023 |
| Paintgear Ans | Wholesale & retail | 2003 |
| Paleet Multimedia AS | Wholesale & retail | 2003 |
| Parcella AS | Professional & scientific | 2021 |
| Partivarer AS | Wholesale & retail | 2019 |
| Partnerforum AS | Administrative & support | 2026 |
| Pdsl Invest AS | Professional & scientific | 2011 |
| Pela AS | Real estate | 2018 |
| Pen Hage AS | Administrative & support | 2015 |
| Pensjonseksperten AS | Education | 2011 |
| Pesv Holding AS | | 2022 |
| Petite France AS | Wholesale & retail | 2018 |
| Petter Furuseth Holding AS | Real estate | 2016 |
| Petter Halvorsen AS | Wholesale & retail | 2023 |
| Petz AS | | 2026 |
| Pharus Development AS | Information & communication | 2025 |
| Pihl Group AS | Professional & scientific | 2018 |
| Pivot Plan & Arkitektur AS | Professional & scientific | 2021 |
| Pizzavera AS | Hospitality | 2019 |
| Plusvendor AS | Information & communication | 2014 |
| PN Holding AS | Construction | 2012 |
| Popa Transport AS | Transport & logistics | 2026 |
| Positive Talk AS | Health & social care | 2021 |
| Prent-Hamer Holding AS | | 2019 |
| Prima Deli Gruppen AS | Wholesale & retail | 2025 |
| Prima Vestfold AS | Wholesale & retail | 2019 |
| Prosharp Norge AS | Wholesale & retail | 2022 |
| Prosjektlab AS | Professional & scientific | 2016 |
| Prosper Holding AS | Financial services | 2016 |
| Proxima Webdesign Ans | Information & communication | 2000 |
| Przedsiebiorstwo Remontowo-Budowlane Faber Piotr Waluszko Nuf | Construction | 2025 |
| PS Bauta AS | | 2026 |
| PTR Holding AS | Real estate | 2007 |
| PW Snekring Og Maling Service AS | Construction | 2024 |
| Quadra Eiendom AS | Real estate | 2026 |
| Quadra Holding AS | Real estate | 2026 |
| R Helsehus AS | Real estate | 2025 |
| R.J Holding AS | Financial services | 2011 |
| R.S. Bygg Solutions AS | Professional & scientific | 2019 |
| Rais Utvikling AS | Real estate | 2020 |
| Raymond Skaue Holding AS | | 2022 |
| Redningen Restaurant AS | Hospitality | 2020 |
| Reff Corporation AS | Professional & scientific | 2013 |
| Rehn Rekruttering Ltd Nuf | Administrative & support | 2007 |
| Renhjørningen AS | Transport & logistics | 2023 |
| Rennefjell Vannverk SA | Water & waste | 2015 |
| Reso Invest AS | Financial services | 2018 |
| Restaurant Sjøsiden AS | Hospitality | 2019 |
| Retra Produkter | Professional & scientific | 2012 |
| Rewind Media AS | Information & communication | 2014 |
| Rghholding AS | | 2026 |
| Ringshaug Oppussing Kowalski AS | Construction | 2018 |
| Ringshaug Tekst AS | Professional & scientific | 2022 |
| RL Consulting AS | Professional & scientific | 2006 |
| Roligheten AS | Transport & logistics | 2024 |
| Roma Trafikkskole AS | Education | 2017 |
| Roto Invest AS | Real estate | 2004 |
| Rsy Holding AS | Financial services | 2019 |
| Rubberdam AS | Health & social care | 2021 |
| Rudsengen Grup AS | Wholesale & retail | 2026 |
| Rusica AS | Real estate | 2017 |
| Rystad Bil AS | Financial services | 2005 |
| Råel Kolonial AS | Wholesale & retail | 2003 |
| Salong Monique AS | Other services | 2024 |
| Samnøy Auto AS | Other services | 2022 |
| Sandbakken Eiendomsselskap AS | Real estate | 2012 |
| Sandås Bygg AS | Construction | 1998 |
| Sat Bygg Og Montering AS | Construction | 2021 |