| Nærland Maskin Og Eiendom AS | | 2015 |
| Nærland Utvikling AS | Administrative & support | 2022 |
| O & S Holding AS | Wholesale & retail | 2014 |
| O Sunde Holding AS | | 2025 |
| O. Tafjord Holding AS | | 2026 |
| O.B.H AS | Professional & scientific | 2025 |
| O.Hl Holding AS | Real estate | 2024 |
| Oceanone AS | Administrative & support | 2024 |
| Oceanone MGM AS | | 2024 |
| Odd Harald Og Sven Hauge Samdrift Da | Agriculture & fishing | 2007 |
| Oddbjørn AS | Financial services | 2004 |
| Oe Sushi Holding AS | Hospitality | 2021 |
| Ohma Wiig Da | Agriculture & fishing | 2000 |
| Ok Thai AS | Wholesale & retail | 2015 |
| Oktober Drift & Service AS | Administrative & support | 2024 |
| Oktober Invest AS | Transport & logistics | 2019 |
| Oktober Logistikk AS | Transport & logistics | 2021 |
| Oktober Transport AS | Transport & logistics | 2022 |
| Ole Molaug Eiendom AS | Real estate | 1989 |
| Olma AS | | 2020 |
| Olma Byggentreprenør AS | Construction | 2023 |
| Olsen Consultants AS | Professional & scientific | 2018 |
| Olån Eiendom AS | Real estate | 2013 |
| Oma Elektro AS | Construction | 2021 |
| On Invest AS | Financial services | 2011 |
| Onor Bemanning AS | Professional & scientific | 2024 |
| Optikk Og Syn AS | Wholesale & retail | 2025 |
| Optimus Holding AS | Real estate | 2005 |
| Ora Holding AS | Financial services | 2017 |
| Orkan Eiendom AS | Real estate | 1999 |
| Ors Drift AS | Hospitality | 2014 |
| Orstad AS | Professional & scientific | 2014 |
| Orstad Investering 8 AS | | 2026 |
| Orstad Revisjon AS | Professional & scientific | 2014 |
| Orstad Rådgivning AS | Professional & scientific | 1998 |
| OS1 Holding AS | | 2023 |
| Osr Holding AS | Professional & scientific | 2015 |
| Oval Software AS | | 2019 |
| Ove Aarre AS | Real estate | 2005 |
| Ove Aarre Eiendom AS | Real estate | 1994 |
| P S Håland Rør AS | Construction | 1999 |
| Pac Skrettingland AS | Manufacturing | 2005 |
| Packed AS | Wholesale & retail | 2006 |
| Pallesen Sveis Ans | Manufacturing | 1995 |
| Pap Stavanger AS | Administrative & support | 2016 |
| Pap Stavanger Holding AS | Administrative & support | 2015 |
| Peisteknikk AS | Construction | 2007 |
| Perchlink AS | | 2023 |
| Perfekt Bilpolering AS | Other services | 2025 |
| Peristalsis AS | Real estate | 2016 |
| Perplex Invest AS | | 2024 |
| Petter Vaaland AS | | 2007 |
| Phom Invest AS | | 2026 |
| Pilar Investment AS | | 2023 |
| Pilatesstudioet AS | Health & social care | 2013 |
| Pilopp Holding AS | Real estate | 2022 |
| Pinskaar AS | Real estate | 2009 |
| Pixa AS | Professional & scientific | 2020 |
| Planor AS | Real estate | 2020 |
| Planum 2023 AS | | 2023 |
| Planum AS | Real estate | 2014 |
| Planum Bolig AS | Real estate | 2016 |
| Planum Eiendom AS | Real estate | 2023 |
| Planum Næring AS | Real estate | 2012 |
| Planum Prosjekt AS | Real estate | 2017 |
| Polle AS | Professional & scientific | 2002 |
| Pollestad Holding AS | | 2021 |
| Pollestadhagen AS | Real estate | 2011 |
| Polygon 9 Engineering AS | Professional & scientific | 2017 |
| Port & Dørsenter AS | Construction | 2009 |
| Possessio Eiendom AS | Real estate | 2013 |
| PP Langmyra 10 AS | Real estate | 2017 |
| Precicon AS | Professional & scientific | 2024 |
| Prefab Partner AS | Wholesale & retail | 2023 |
| Prestevegen AS | Real estate | 2019 |
| Primo Pizzeria AS | Hospitality | 2021 |
| Print Tech AS | Manufacturing | 2020 |
| PRO1 AS | | 2022 |
| Produmore AS | Professional & scientific | 2021 |
| Profilecutting AS | Manufacturing | 2020 |
| Proventus 10 AS | | 2024 |
| Proxima Centauri B AS | | 2024 |
| PSH Invest AS | Real estate | 2012 |
| Pynt Og Personlighet Da | Information & communication | 2024 |
| Pålakrossen AS | Professional & scientific | 2014 |
| Qben Real Estate Norway AS | Construction | 2022 |
| Quick Entreprenør AS | Construction | 2024 |
| Quick Logistikk AS | Transport & logistics | 2017 |
| Quick Solution AS | Transport & logistics | 2020 |
| Quick Transport AS | Transport & logistics | 2020 |
| R M Eiendom AS | Real estate | 1982 |
| R1 Bolig 550 AS | Construction | 2024 |
| R2 Bolig AS | Construction | 2015 |
| Rabarbrahagen AS | Agriculture & fishing | 2011 |
| Ral Investering AS | Financial services | 2018 |
| Rammehuset L. a. Pedersen AS | Manufacturing | 2005 |
| Raune AS | Professional & scientific | 1991 |
| Raunefjell Gard AS | Real estate | 2022 |
| Ravnheim AS | | 2025 |
| RD Forbrenningskonsult AS | Professional & scientific | 2025 |