| Otc AS | Real estate | 2011 |
| Ottar Hummelsund AS | Financial services | 2005 |
| Otti Invest AS | | 2005 |
| Outdoor Lagunen AS | Wholesale & retail | 2022 |
| Ovstheim AS | | 2025 |
| Ovstind AS | Financial services | 2014 |
| Oyba AS | | 2026 |
| Ozark AS | Real estate | 2021 |
| P Larsen Holding AS | Real estate | 2008 |
| P-H Nilsen Holding AS | Administrative & support | 2005 |
| P. Helland Rådgivning AS | Professional & scientific | 2005 |
| Pa Teknikk AS | Wholesale & retail | 2014 |
| Pa Tuning AS | Wholesale & retail | 2015 |
| Paan AS | Health & social care | 2021 |
| Paan Invest AS | | 2021 |
| Paan Tannlegetjenester AS | Health & social care | 2021 |
| Paj Service AS | | 2001 |
| Pallbeck Invest AS | Real estate | 2005 |
| Pandora Film AS | Information & communication | 2001 |
| Pasco AS | | 2022 |
| Pastell Frisørsalonger AS | Other services | 2014 |
| Patara AS | Real estate | 2017 |
| Patch AS | Information & communication | 2022 |
| PC Resq Ans | Other services | 2003 |
| PDL Holding AS | | 2025 |
| Pe-Ha Holding AS | Health & social care | 2012 |
| Pearls and Knits AS | Wholesale & retail | 2024 |
| Pentatonic AS | Professional & scientific | 2010 |
| Perfect Affinity Consulting AS | Information & communication | 2026 |
| Perfect Affinity Holding AS | | 2026 |
| Pergola Vinimport AS | Wholesale & retail | 2015 |
| Peter Malerservice AS | Construction | 2026 |
| Petrolia Noco AS | Mining & quarrying | 2011 |
| Philip Baginski AS | Construction | 2023 |
| Pileus AS | Information & communication | 2008 |
| Pim Consulting AS | Information & communication | 2019 |
| Pineapple Consulting AS | Professional & scientific | 2020 |
| Pineapple Holding AS | Professional & scientific | 2020 |
| Pki Legetjeneste AS | Health & social care | 2020 |
| PKS AS | | 2025 |
| Placebo Holding Ltd | | 2007 |
| Plan Eiendom AS | Real estate | 1998 |
| Pletten Holding AS | | 2013 |
| Po Steinsland Invest AS | Financial services | 2016 |
| Poppy Creative AS | Professional & scientific | 2024 |
| Pors Holding AS | | 2022 |
| Portkey AS | | 2019 |
| Pottemonè Holding AS | | 2024 |
| Powder Invest AS | Real estate | 2012 |
| Powertexnorway.No AS | Wholesale & retail | 2022 |
| Pragmatisk Utvikling AS | Information & communication | 2023 |
| Pregame AS | Wholesale & retail | 2023 |
| Primstaven AS | Professional & scientific | 1992 |
| Privatistkompasset AS | Education | 2026 |
| Pro Tibi AS | Administrative & support | 2021 |
| Processus AS | Real estate | 2009 |
| Prosaic AS | Professional & scientific | 2019 |
| PS Reklame Bergen AS | Professional & scientific | 1999 |
| Pum Holding AS | Financial services | 2005 |
| Pønsj AS | Administrative & support | 2017 |
| Qamishlo Grupp AS | Hospitality | 2026 |
| QWT AS | Wholesale & retail | 2016 |
| R. Haraldsen Holding AS | Administrative & support | 2020 |
| Raa Holding AS | Real estate | 2013 |
| Raa Invest & Consulting AS | Real estate | 2018 |
| Raa Næringspark AS | Real estate | 2023 |
| Raa Næringspark Invest AS | Real estate | 2023 |
| Raadhus AS | Professional & scientific | 2006 |
| Raak AS | | 2022 |
| Radiohuset Siv.Ing Vindenes AS | Professional & scientific | 2025 |
| Rado Invest AS | Real estate | 1997 |
| Rafto Holding AS | Financial services | 2017 |
| Ragn-Sells Havbruk AS | Energy | 2018 |
| Rako AS | Transport & logistics | 2025 |
| Ramsvik Frisør Lagunen AS | Other services | 2014 |
| Rastum Holding AS | Professional & scientific | 2022 |
| Ravello AS | Information & communication | 2016 |
| Ravn Hagen Engineering AS | Professional & scientific | 2025 |
| Ravo Holding AS | Real estate | 2017 |
| Reach AS | Professional & scientific | 2005 |
| Real-Snow AS | Wholesale & retail | 2016 |
| Realtime Holding AS | Financial services | 2009 |
| Realty Lanka AS | Real estate | 2007 |
| Red Shoes AS | Financial services | 2009 |
| Refvik Kapital AS | | 2026 |
| Reinkind Invest AS | | 2021 |
| Reiso Holding AS | Professional & scientific | 2017 |
| Reiso Invest AS | Wholesale & retail | 2006 |
| Reiton Holding AS | Transport & logistics | 2010 |
| Rentec Rune Larsen AS | Professional & scientific | 2025 |
| Retrolux AS | Wholesale & retail | 2025 |
| RH Multiservice AS | Administrative & support | 2020 |
| Ritland Fiskeeksport AS | Wholesale & retail | 1985 |
| RKT Invest AS | Wholesale & retail | 2005 |
| Robin Holding AS | Financial services | 2013 |
| Robinhus AS | Financial services | 2008 |
| Rock Engineering Uab | Construction | 2010 |
| Rognholmen AS | Professional & scientific | 2014 |
| Rokon Black AS | Professional & scientific | 2024 |
| Rola Investment AS | Real estate | 2020 |