| Norwegian Aviation & Defense Service and Support Center AS | Wholesale & retail | 2019 |
| Norwegian Competence Centre Helicopter AS | Education | 2016 |
| NPT Holding AS | Professional & scientific | 2005 |
| NSL Eiendom & Invest AS | Manufacturing | 2006 |
| NSL Eiendom Brazil AS | | 2023 |
| Nye Evintas AS | Hospitality | 2021 |
| Nye Imperial Engros AS | Wholesale & retail | 2002 |
| Nye Jasec AS | | 2025 |
| Nyvik Invest AS | Financial services | 2005 |
| O&Th Eiendom AS | Real estate | 2010 |
| Oa Finstad Holding AS | | 2025 |
| OAK1 Data AS | Information & communication | 2023 |
| Obsideri Fiscus AS | Financial services | 2015 |
| Offshore Technology Partner AS | Professional & scientific | 2010 |
| Offtech AS | Professional & scientific | 2012 |
| Oftedal Investering AS | Professional & scientific | 2022 |
| Olavs Holding AS | Real estate | 2005 |
| Om Consulting AS | Professional & scientific | 2021 |
| Omega Elektro AS | Construction | 2020 |
| Onk Holding AS | | 2021 |
| Onwards AS | Professional & scientific | 2023 |
| Oolabs AS | Information & communication | 2026 |
| Open IT AS | Information & communication | 1999 |
| Orisha AS | | 2017 |
| Os Forvaltning AS | Administrative & support | 2005 |
| Osola Maskin Utleie AS | Administrative & support | 2025 |
| Oters AS | Real estate | 2022 |
| Oth Investment AS | Professional & scientific | 2023 |
| Otter Invest AS | | 2022 |
| Pantera AS | | 2017 |
| Para-Bellum AS | Professional & scientific | 2021 |
| Partnerr AS | Construction | 2023 |
| Pas AS | | 2020 |
| PB Holding I AS | Real estate | 2021 |
| Peder Erga AS | Mining & quarrying | 2024 |
| Pederferje Holding AS | Professional & scientific | 2013 |
| Permu AS | Construction | 2025 |
| Petrodragon AS | Financial services | 2016 |
| Peval Invest AS | | 2021 |
| Physical Medicine Holding AS | Health & social care | 2019 |
| Pilotspace AS | Professional & scientific | 2017 |
| Pingvin AS | Real estate | 2003 |
| Plei Meg Sola Klinikk AS | Health & social care | 2015 |
| PMG AS | Health & social care | 2012 |
| Pocon AS | Administrative & support | 2016 |
| Pos Invest AS | Wholesale & retail | 2005 |
| PPL Invest AS | | 2025 |
| Praelia AS | Wholesale & retail | 2018 |
| Pre-Natur AS | Professional & scientific | 2025 |
| Preben Risa Holding AS | | 2023 |
| Procad AS | Professional & scientific | 2024 |
| Process Tech AS | Professional & scientific | 2022 |
| Profsart AS | | 2026 |
| Project Performance Partner AS | Real estate | 2020 |
| Project Ryan AS | Financial services | 2006 |
| Property Management AS | Real estate | 2025 |
| Protrans Service AS | Transport & logistics | 2025 |
| Pål Thingbø AS | Real estate | 2016 |
| Quality Airport Hotel Stavanger AS | Hospitality | 1994 |
| Quantile AS | Information & communication | 2017 |
| Quest Executive Search AS | Professional & scientific | 2014 |
| Rallen AS | Financial services | 2005 |
| Rapshare AS | | 2022 |
| Rasmussen Eiendom AS | Real estate | 2018 |
| Rasmussen Elektro AS | Construction | 2018 |
| Ravlei AS | Real estate | 2022 |
| Ravlei Holding AS | Real estate | 2022 |
| RB Trading AS | Administrative & support | 2016 |
| RB Tun AS | Administrative & support | 2025 |
| Reelwell AS | Professional & scientific | 2004 |
| Reflections Holding AS | Other services | 2021 |
| Rental Maskin AS | Wholesale & retail | 2012 |
| Reol Plan AS | Wholesale & retail | 1995 |
| Rhythm of the Times AS | Education | 2012 |
| Riber Multiservice AS | Manufacturing | 2017 |
| Risa Investering AS | | 2024 |
| Ritland Eiendom AS | Real estate | 1979 |
| RK Investment AS | Financial services | 2013 |
| Roag AS | Real estate | 2006 |
| Robbie Rust Limited | Professional & scientific | 2020 |
| Robotics Services AS | Information & communication | 2015 |
| Rock Taxi AS | Transport & logistics | 2014 |
| Rodin Sola AS | Hospitality | 2020 |
| Rogaland Betong AS | Construction | 2025 |
| Rogaland HMS AS | Health & social care | 2010 |
| Rogaland Invest AS | | 2026 |
| Rogaland Omsorg AS | Health & social care | 2012 |
| Rogaland Rør & Renovering AS | Construction | 2020 |
| Rogaland Teknikk AS | Professional & scientific | 2006 |
| Rokk Eiendom AS | Real estate | 2011 |
| Romo AS | Professional & scientific | 1998 |
| Rosenkrantzgaarden AS | Construction | 2010 |
| Rosnes Holding AS | Wholesale & retail | 2009 |
| Rosseland Bygg AS | Real estate | 2013 |
| Rovestor AS | | 2018 |
| RSS AS | | 2006 |
| Rutek AS | Professional & scientific | 2005 |
| RV Maskin AS | Administrative & support | 2019 |
| RVK Invest AS | Manufacturing | 2018 |
| Ryfylke Bygg & Interiør AS | Manufacturing | 2019 |