| Norsk Helsekost AS | Wholesale & retail | 2024 |
| Oceans Interactive AS | Information & communication | 2005 |
| Ole Jonny Grønbrekk AS | Construction | 2010 |
| Oliva Holding AS | Real estate | 2013 |
| Orangeriet AS | Wholesale & retail | 2021 |
| Oreon AS | Wholesale & retail | 2017 |
| Panorama Eiendom AS | Real estate | 2015 |
| Peismakern AS | Professional & scientific | 1989 |
| Pengeforlaget AS | Professional & scientific | 1987 |
| Perussi Norge AS | Information & communication | 2018 |
| Perussi Regnskap AS | Professional & scientific | 2020 |
| PK Bygg Og Taksering AS | Professional & scientific | 2014 |
| Plutonapps AS | Information & communication | 2023 |
| Polo Invest AS | Real estate | 2001 |
| Polybos Digital AS | Information & communication | 2026 |
| Post I Heggedal AS | Transport & logistics | 2020 |
| Power Tools Norge AS | Education | 2008 |
| Principessa AS | Real estate | 2015 |
| Pro-Tech Marine AS | Professional & scientific | 1997 |
| Pål C Nilsen AS | Manufacturing | 2005 |
| Rahiti Film AS | Information & communication | 2014 |
| Rak Assets AS | | 2025 |
| Raks AS | Construction | 2013 |
| Real Bil AS | Other services | 2007 |
| Rehabcare AS | Health & social care | 2024 |
| Retreat Asker AS | Health & social care | 2023 |
| Rmti AS | Construction | 2024 |
| Rolling Digital Marketing Burnheim Invest | | 2021 |
| Ron Invest AS | Real estate | 2015 |
| Rosnor AS | Professional & scientific | 2015 |
| RP Bygg AS | Construction | 2007 |
| Rustad Rørservice AS | Construction | 2009 |
| Rustand Holdings AS | | 2021 |
| Rødsåslia SA | Real estate | 2023 |
| Røising Prosjekt AS | Professional & scientific | 2026 |
| Scalytica AS | Information & communication | 2021 |
| Scanlab Da | Professional & scientific | 1999 |
| Seheim AS | Professional & scientific | 2021 |
| Sem Jord AS | Water & waste | 1992 |
| Seventyone Hockey AS | Wholesale & retail | 2024 |
| SFC Consulting AS | Professional & scientific | 2024 |
| Siam Sushi AS | Hospitality | 2014 |
| Simon-San AS | | 2019 |
| Singara Rao Karna Nuf | Wholesale & retail | 2024 |
| Siv Ing Bjørn Gulbrandsen AS | Professional & scientific | 2025 |
| Sixty North AS | Information & communication | 2018 |
| Skald Studio AS | Professional & scientific | 2025 |
| Skintir AS | | 2025 |
| Skogia Da | Agriculture & fishing | 2017 |
| Skorpion AS | | 2008 |
| Smart Building AS | Construction | 2019 |
| Smeland Haug Invest AS | | 2022 |
| SNC Transport & Logistikk Da | Transport & logistics | 2006 |
| Snepre Holding AS | | 2024 |
| Snepre Invest AS | | 2025 |
| Soa Holding AS | Professional & scientific | 2014 |
| Sohtai Import Da | Wholesale & retail | 2005 |
| Soleiemarmor AS | Professional & scientific | 2007 |
| Solheimskringla AS | Professional & scientific | 2021 |
| Solsikker Holding AS | | 2006 |
| Sommervoll Eiendom AS | | 2023 |
| Sparkling AS | Other services | 2014 |
| Spiten Tech AS | Professional & scientific | 2019 |
| Stenvaag Våpen Ans | Wholesale & retail | 1988 |
| Strategyable Consulting AS | Professional & scientific | 2017 |
| Straumkraft AS | Energy | 2012 |
| Stutteri B AS | Agriculture & fishing | 2019 |
| Stærk Sport Og Produksjon AS | Wholesale & retail | 2012 |
| Summit Investment AS | | 2026 |
| Sun Mountain AS | Professional & scientific | 2015 |
| Sunbirch Capital AS | Information & communication | 2025 |
| Sunde Håndverk AS | Construction | 2026 |
| Sutterud Invest AS | Financial services | 2005 |
| Sverdrup Adventures AS | Administrative & support | 2021 |
| Sverdrup Invest AS | Administrative & support | 2018 |
| Søndre Gjernes Vann Og Avløp SA | Water & waste | 2013 |
| Tak Og Byggfasade AS | Construction | 2019 |
| Tannlegene Heggedalsenteret AS | Health & social care | 2021 |
| Terje Børsum Holding AS | | 2023 |
| The 055 Holding AS | | 2023 |
| The Dram Whisky Consulting AS | Administrative & support | 2015 |
| The Purchasing Group AS | Wholesale & retail | 2014 |
| The Samuel Jackson Five Da | Arts & recreation | 2025 |
| Thomas Berg Holding AS | | 2023 |
| Thomat AS | Wholesale & retail | 2014 |
| Thorvaldsen Digital AS | | 2026 |
| Titt Innom Da | Wholesale & retail | 1989 |
| Tjelle Holding AS | | 2026 |
| Toch Invest AS | | 2020 |
| Tomlebu AS | Professional & scientific | 2025 |
| Tore Haugen Consulting AS | Professional & scientific | 2022 |
| Torp Høymyr Barnehage SA | Education | 1995 |
| Transition Elements AS | Professional & scientific | 2019 |
| Transmisat AS | Professional & scientific | 2007 |
| Tre & Håndverk AS | Construction | 2022 |
| Trollkleiva Veilag SA | Real estate | 1994 |
| Tronrud Ventures AS | Professional & scientific | 2017 |
| Tufte Invest AS | Financial services | 2018 |
| Tutela AS | Health & social care | 2018 |
| Tuv AS | | 2024 |