| Psykolog Westlye Dahl AS | Health & social care | 2025 |
| Psykolognett Da | Health & social care | 2000 |
| Psykologspesialist Silje Vignes Andersen AS | Health & social care | 2022 |
| Psykologspesialist Tomas Rømcke AS | Health & social care | 2013 |
| PT Holding AS | Real estate | 2005 |
| PT Service AS | Health & social care | 2018 |
| Ptech AS | Professional & scientific | 2022 |
| PTG Rig Consulting AS | Professional & scientific | 2008 |
| PTK Management AS | Professional & scientific | 2016 |
| PTR Invest AS | Professional & scientific | 2020 |
| Puck AS | Real estate | 2013 |
| Pulpit Rock Invest AS | | 2019 |
| Pulsar Bolig AS | Real estate | 2025 |
| Pulsar Eiendom AS | Real estate | 2020 |
| Punto Invest AS | Financial services | 2006 |
| Pupilla AS | Financial services | 2016 |
| Puravida Holding AS | Health & social care | 2021 |
| PV Eiendom AS | Real estate | 2013 |
| PVS Invest AS | Real estate | 2014 |
| Pynteneset Andeler AS | Real estate | 2021 |
| Pynteneset Eiendom AS | Real estate | 2000 |
| Pyton Invest AS | | 2025 |
| Pyton Pizza AS | Hospitality | 2025 |
| På Tråden Telefon- Og Sekretærtjenester AS | Construction | 1997 |
| Pål Bjerga Øyelege AS | Health & social care | 2014 |
| Pål Hapnes AS | Professional & scientific | 2009 |
| Pôi Designstudio Da | Professional & scientific | 2022 |
| Pølsebussen AS | Hospitality | 2004 |
| Pølsemanden Ans | Hospitality | 1990 |
| Pølsevev&Delikatesse AS | Hospitality | 2024 |
| Q10 Next AS | Professional & scientific | 2024 |
| Q10 Offshore AS | Administrative & support | 2017 |
| Q10 Offshore Service AS | Professional & scientific | 2013 |
| Q10 Personell AS | Administrative & support | 2013 |
| Qas AS | Professional & scientific | 2006 |
| QGC AS | Professional & scientific | 2013 |
| QT Holding AS | | 2026 |
| Qualia Holding AS | Information & communication | 2021 |
| Quality Lab AS | Health & social care | 2006 |
| Quality Sector AS | | 2016 |
| Quality Served AS | Wholesale & retail | 2020 |
| Quality Wine Import AS | Wholesale & retail | 2015 |
| Quantum Drive AS | | 2022 |
| Qube Partner AS | Professional & scientific | 2021 |
| Que Bola AS | Financial services | 2016 |
| Quest Plattform AS | Information & communication | 2016 |
| QUIRE24 AS | Arts & recreation | 2021 |
| Qvale Holding AS | Health & social care | 2023 |
| R Flekkefjord AS | Manufacturing | 2008 |
| R O Consulting AS | Financial services | 2005 |
| R&C Invest AS | | 2021 |
| R&E Tjemsland AS | Administrative & support | 2024 |
| R&R Technology AS | | 2025 |
| R-R Holding AS | | 2017 |
| R. Birkeland Holding AS | | 2026 |
| R. Lende Its Consulting AS | Information & communication | 2008 |
| R. Stahl Norge AS | Manufacturing | 2007 |
| R. Stahl Tranberg AS | Manufacturing | 2004 |
| R.Skoglund Holding AS | | 2022 |
| R2S Elektro AS | Construction | 2017 |
| Ra Consulting AS | Professional & scientific | 2024 |
| Ra Stavanger AS | Information & communication | 2023 |
| Ra Trading & Invest AS | | 2018 |
| Ra Turf Lighting Solutions AS | Manufacturing | 1990 |
| Rabarbro AS | Arts & recreation | 2023 |
| Rabaska AS | Wholesale & retail | 2024 |
| Race AS | Information & communication | 2019 |
| Racho AS | | 2019 |
| Racine Finans AS | Real estate | 1983 |
| Racine Invest AS | Real estate | 2026 |
| Rackeverse AS | Information & communication | 2025 |
| Rackit AS | Professional & scientific | 2016 |
| Rad Bygg AS | Construction | 2016 |
| Radar Holding AS | | 2026 |
| Radcorp AS | Information & communication | 2014 |
| Radh Holding AS | | 2020 |
| Radiance AS | Wholesale & retail | 2005 |
| Radiatorservice AS | Manufacturing | 2025 |
| Radiocentralen Eiendom AS | Real estate | 1978 |
| Radipro AS | Professional & scientific | 2015 |
| Radonconsult AS | Construction | 2025 |
| Rafoss Investering AS | Financial services | 2005 |
| Ragbakken Næring AS | Real estate | 2023 |
| Ragnar Invest AS | Real estate | 2005 |
| Ragnar Svensen AS | Construction | 1982 |
| Rain Dog Holding AS | Financial services | 2018 |
| Rainbot AS | Arts & recreation | 2017 |
| Rainbow Spirit AS | Transport & logistics | 2017 |
| Rainmerch AS | Wholesale & retail | 2023 |
| Rajan Holding AS | Wholesale & retail | 2023 |
| Rakon AS | Construction | 2008 |
| Ramanama AS | | 2025 |
| Ramp AS | Professional & scientific | 2008 |
| Ramp Eiendom AS | Real estate | 2000 |
| Ramsdal Strategisk Design AS | Professional & scientific | 2025 |
| Ramstad Holding AS | | 2013 |
| Ramsvig AS | Real estate | 2023 |
| Ramsvig Invest AS | Hospitality | 2026 |
| Ramsvigkroken Invest AS | Information & communication | 2015 |
| Ramtech AS | Information & communication | 2023 |