| MKT Holding AS | | 2020 |
| Mlyngved Invest AS | | 2024 |
| Mob Kapital AS | | 2021 |
| Mobula Music AS | Information & communication | 2024 |
| Module Pipes Oü | Construction | 2017 |
| Moen & Bjerlin Da | Construction | 1998 |
| Mold Bygg AS | Construction | 2021 |
| Multistyle Konsult Norge AS | Other services | 2023 |
| My Little Storage AS | Real estate | 2025 |
| Myrvangvegen 8 Holding AS | Real estate | 2024 |
| Mæhlum & Jansen Eiendom Da | Real estate | 2013 |
| Naglo AS | Real estate | 2009 |
| Nature Travel AS | Administrative & support | 2022 |
| Nextstage AS | Real estate | 2003 |
| Niar Invest AS | Financial services | 2021 |
| Nicio Electric AS | Information & communication | 2026 |
| Niko Entreprenør AS | Construction | 2026 |
| Niko Investment AS | | 2025 |
| No 5 Invest AS | Real estate | 2017 |
| Nordic E-Commerce Group AS | Wholesale & retail | 2022 |
| Nordic Services AS | Professional & scientific | 2012 |
| Norexpress AS | Transport & logistics | 2014 |
| Normania Holding AS | | 2021 |
| Norsk Folkeopera Ans | Arts & recreation | 2011 |
| Norsk Næringstakst AS | Real estate | 2015 |
| Norvo AS | Construction | 2026 |
| Nummis Holding AS | | 2019 |
| NWF AS | Arts & recreation | 2025 |
| Nytt Perspektiv AS | Professional & scientific | 2023 |
| O. Trudvang Invest AS | Financial services | 2005 |
| Oasen Frisør AS | Other services | 2013 |
| Obj Holding AS | Financial services | 2014 |
| Objekt Invest AS | Real estate | 2006 |
| Och Invest AS | | 2019 |
| Odegaard Holding AS | | 2020 |
| Okh Holding AS | Financial services | 2015 |
| Olivos AS | Real estate | 2013 |
| Omnicus AS | Information & communication | 2016 |
| Ornio AS | Information & communication | 2014 |
| Ornio Group AS | Information & communication | 2025 |
| Oslo Hifi Show AS | Administrative & support | 2022 |
| Oslo Og Akershus Storkjøkken AS | Wholesale & retail | 2025 |
| Oslo Rør&Bad AS | Construction | 2022 |
| Otervik Holding AS | | 2026 |
| Paf Invest AS | Real estate | 2005 |
| Pangea Holding AS | | 2023 |
| Panuka AS | Wholesale & retail | 2022 |
| Partylyd AS | Administrative & support | 2013 |
| Pei Fang AS | Health & social care | 2024 |
| Per a Paulsen AS | Construction | 1986 |
| Perjo AS | Real estate | 2007 |
| Pettersen Studio AS | Information & communication | 2026 |
| Pexus Holding AS | Real estate | 2005 |
| Pirtaxi AS | Transport & logistics | 2025 |
| Pksm Holding AS | Hospitality | 2018 |
| Plantelux AS | Wholesale & retail | 2025 |
| PLM Cad Utilities AS | Professional & scientific | 2017 |
| Poncho Holding AS | | 2024 |
| Prezzo AS | Wholesale & retail | 2020 |
| Proactive Consult AS | Health & social care | 2021 |
| Probase AS | Professional & scientific | 2015 |
| Proff Trening AS | Education | 2025 |
| Promount AS | Wholesale & retail | 2021 |
| Purld AS | | 2021 |
| Rachel Selnes AS | Information & communication | 2024 |
| Raincoat Holding AS | | 2025 |
| Rake Holding AS | Construction | 2016 |
| Ramfjell Invest AS | Real estate | 2006 |
| Ramiteh Ou | Construction | 2016 |
| Rampe Holding AS | Financial services | 2016 |
| Raymark AS | Professional & scientific | 2012 |
| Realmat AS | Hospitality | 2015 |
| Realmat Holding AS | Real estate | 2015 |
| Realmat Kantinedrift AS | Hospitality | 2020 |
| Realty AS | Real estate | 2007 |
| Red Sun Restaurant Og Bar AS | Hospitality | 2005 |
| Reinsborg Holding AS | Hospitality | 2015 |
| Remm Rørleggerbedrift AS | Construction | 2023 |
| Renholdsøkonomi AS | Information & communication | 1988 |
| Rholding AS | | 2025 |
| Rkh-Invest AS | Financial services | 2021 |
| Rli Holding AS | Transport & logistics | 2005 |
| Roger Holding AS | Construction | 2008 |
| Rolin AS | Manufacturing | 2005 |
| Romeriksklinikken AS | Health & social care | 2018 |
| RSB Regnskap AS | Professional & scientific | 2005 |
| Rude-Hansen Holding AS | | 2012 |
| Rune Og Bente Invest AS | Real estate | 2016 |
| RWS Holding AS | | 2020 |
| Råd Og Regnskapstjenester AS | Professional & scientific | 2025 |
| Røbech Invest AS | Real estate | 1995 |
| Rørleggermester Erlandsen AS | | 2017 |
| Røsjø AS | Financial services | 2007 |
| S N Invest AS | Real estate | 2017 |
| Samk AS | | 2026 |
| Sandvær Eiendom AS | Real estate | 2022 |
| Sandø Gaard Da | Real estate | 1991 |
| Santana Kickboxing K1 Club AS | Arts & recreation | 2024 |
| Santana Legacy Group AS | | 2026 |
| Sarepta Forlag AS | Information & communication | 1995 |