| Nadia's Beauty AS | Other services | 2021 |
| National Lim Norge AS | Wholesale & retail | 1996 |
| Naturbilder AS | Information & communication | 2022 |
| Neat Norway AS | Financial services | 2017 |
| Nedre Stabæk Barnehage AS | Education | 2005 |
| Nixielab AS | | 2025 |
| Nor-Pel A/S | Manufacturing | 1975 |
| Norbark AS | Agriculture & fishing | 2025 |
| Norbitel AS | Information & communication | 2021 |
| Nordic Cognitive Labs AS | Information & communication | 2024 |
| Nordisk Brannvern AS | Professional & scientific | 2025 |
| Nordpeis AS | Wholesale & retail | 1990 |
| Norfilter AS | Wholesale & retail | 1993 |
| Norgruppen AS | Wholesale & retail | 1985 |
| Norsk Bildelsenter AS | Wholesale & retail | 1990 |
| Norsk Trepleie AS | Administrative & support | 2019 |
| Norwaves Systems AS | Information & communication | 2026 |
| Norwegian Well AS | Professional & scientific | 2010 |
| Ny China Wok AS | Hospitality | 2019 |
| Nye Rypetakst AS | Real estate | 2026 |
| Næringsentreprenøren AS | Professional & scientific | 2019 |
| O E Wolds Eftf AS | Construction | 1998 |
| Occulights AS | Information & communication | 2024 |
| Oikos AS | | 1996 |
| Opb Services AS | Administrative & support | 1997 |
| Ordovicium AS | Wholesale & retail | 2019 |
| Orn Invest AS | Financial services | 2008 |
| Percento AS | Professional & scientific | 2014 |
| PH. Thorstensen Invest AS | | 2021 |
| Polaris Electronics Norge AS | Wholesale & retail | 2019 |
| Portsenteret AS | Construction | 2010 |
| Presisjonsboring AS | Construction | 2016 |
| Rakafant AS | | 2013 |
| Realvekst AS | Real estate | 1989 |
| Reef AS | Real estate | 2007 |
| Regnbuen Invest AS | Real estate | 2010 |
| Regnbuen Legekontor AS | Health & social care | 2017 |
| Rehabcare Bygg AS | Construction | 2025 |
| Reinholdt Frost AS | Wholesale & retail | 2005 |
| Rethink Aqua AS | Real estate | 2020 |
| Rethink Aqua, Unipessoal Lda Nuf | Wholesale & retail | 2024 |
| Ro-Ar Holding AS | Construction | 2016 |
| Rodi Solutions AS | Information & communication | 2024 |
| Roen Holding AS | | 2026 |
| Ronny Heibo-Jakobsen Holding AS | | 2015 |
| Rypes Drift Og Vedlikehold AS | Real estate | 2026 |
| Rønning Holding AS | Wholesale & retail | 2024 |
| Rør Og Rørdeler AS | Construction | 2018 |
| S.K Holding Group AS | | 2020 |
| S.K Motor Senter AS | Wholesale & retail | 2024 |
| Sagvollen AS | Transport & logistics | 2014 |
| Samarbeidspartnerne Ans | Construction | 2021 |
| Sanomar AS | Wholesale & retail | 2007 |
| Sansa Consulting AS | Information & communication | 2015 |
| Sativus AS | | 2020 |
| Seak Invest AS | Real estate | 2018 |
| Servicegrossisten Øst AS | Wholesale & retail | 1986 |
| Sesini Liertoppen AS | Wholesale & retail | 2005 |
| SG Øst Holding AS | Wholesale & retail | 2020 |
| Shadow Holding AS | | 2023 |
| SJP Holding AS | Real estate | 2005 |
| Skaar Service AS | Wholesale & retail | 2021 |
| Skiguard AS | Wholesale & retail | 1993 |
| Smartstrøm AS | Construction | 2011 |
| Snuffeldyret AS | Financial services | 2005 |
| Soka Invest AS | Construction | 2016 |
| Somlehub AS | Education | 2026 |
| Sse Invest AS | Financial services | 2011 |
| Stall Gullik AS | Arts & recreation | 1994 |
| Stall Gullik Eiendom AS | Arts & recreation | 2018 |
| Steve Cooling AS | Professional & scientific | 2014 |
| Stgu AS | | 1990 |
| Stochest AS | Information & communication | 2025 |
| Storbilvasken Liertoppen AS | Other services | 2019 |
| Studio Ibsen AS | Professional & scientific | 2025 |
| Stuput AS | Financial services | 2015 |
| Sundsmoen & Borgen AS | Transport & logistics | 2018 |
| Svanholmen 4 Eiendom AS | Real estate | 2020 |
| Svein Ringstad AS | Real estate | 1980 |
| T Lindborg Entreprenad | Administrative & support | 2016 |
| T&T Service AS | Real estate | 2013 |
| Takst & VVS AS | Construction | 2023 |
| Tau-Holding AS | | 2025 |
| TBL Consult AS | Professional & scientific | 2020 |
| Techin Solutions AS | Information & communication | 2025 |
| Techno Classic Norway- Norsk Bilomsetning AS | Wholesale & retail | 1994 |
| Tefm Holding AS | | 2021 |
| Terjo Bygg AS | Construction | 2014 |
| TNB Liertoppen AS | Wholesale & retail | 2013 |
| To-Be-More AS | Administrative & support | 2008 |
| To-Be-More Holding AS | | 2024 |
| Tollefsen & Hantveit AS | | 2020 |
| Tolmod Invest AS | | 2020 |
| Tomra Butikksystemer AS | Manufacturing | 1939 |
| Tor Arne Utengen AS | Real estate | 2006 |
| Trinax AS | Information & communication | 2020 |
| Trio Betong AS | Construction | 2019 |
| Tta Holding AS | Real estate | 2005 |
| TTM AS | Transport & logistics | 2018 |
| Twilight Investment AS | Professional & scientific | 2014 |