| Siga Safety Products Ans | Wholesale & retail | 2014 |
| Silje Neteland Holding AS | | 2025 |
| Siljes Hundelufting AS | Other services | 2013 |
| Simul Holding AS | | 2021 |
| Sindre Hagen Holding AS | Professional & scientific | 2014 |
| Sinius AS | Education | 1992 |
| Sivilingeniør Leif K Lunke AS | Professional & scientific | 1993 |
| SK Eiendomsinvest AS | Real estate | 2022 |
| Skagerak Field Engineering AS | Professional & scientific | 1988 |
| Skemmz Holding AS | Hospitality | 2018 |
| Skjonginvest AS | | 2025 |
| Skurdal Logistics & Lean Consulting AS | Professional & scientific | 2023 |
| Slependveien 106 AS | Real estate | 2009 |
| Smidigakademiet AS | Professional & scientific | 2022 |
| Sne Invest AS | | 2026 |
| Snøball Invest AS | | 2021 |
| Somaras Invest AS | Real estate | 2006 |
| Somle Holding AS | | 2026 |
| Spearpoint Consulting AS | Professional & scientific | 2017 |
| Sportalpine Norway AS | Wholesale & retail | 2005 |
| Sports Consult AS | Real estate | 1996 |
| Spqr AS | Health & social care | 2021 |
| STC Industrier AS | Real estate | 2007 |
| Stender Eiendom AS | Real estate | 1998 |
| Stene Rapp Holding AS | | 2025 |
| Stenrød Invest AS | | 2023 |
| Striuogaitis Holding AS | | 2023 |
| Studio Bekk AS | Other services | 2023 |
| Studio Living AS | Professional & scientific | 2025 |
| Studionerland AS | Professional & scientific | 2024 |
| Sum AS | Real estate | 2008 |
| Sundt Investments AS | | 2021 |
| Svarstad Industrier AS | | 2008 |
| Svea Invest AS | Financial services | 2004 |
| Sverdstad AS | Transport & logistics | 2019 |
| T T Invest AS | Wholesale & retail | 2010 |
| T-2 Invest AS | Real estate | 2002 |
| Tabithes Holdingsselskap AS | | 2018 |
| Tannlege Bente Åsnes AS | Health & social care | 2019 |
| Tazz AS | Wholesale & retail | 2001 |
| Tellefsen Energy AS | Professional & scientific | 2023 |
| Telud Invest AS | | 2021 |
| Tempori AS | Professional & scientific | 2002 |
| Tempori Technology AS | Professional & scientific | 2007 |
| Teri AS | Health & social care | 2017 |
| Tesoni AS | Health & social care | 2013 |
| TFS & Co AS | Construction | 2014 |
| The Competence Hub AS | Information & communication | 2012 |
| The Dealers Den AS | Professional & scientific | 2023 |
| The Identity Paper AS | Wholesale & retail | 2017 |
| The Identity Pharma AS | Wholesale & retail | 2017 |
| Tho Holding AS | Financial services | 2014 |
| Thomas P Ness AS | Transport & logistics | 1990 |
| Ticos AS | | 2017 |
| Tidemands Invest AS | | 2023 |
| Tilt Musikk Ans | Arts & recreation | 2019 |
| Titano Eiendom AS | Real estate | 1998 |
| Titano Holding AS | Real estate | 2004 |
| Tjæregras Entreprenør AS | Construction | 2012 |
| Tohama AS | | 2018 |
| Tom Solheim Holding AS | Professional & scientific | 2024 |
| Tonito AS | Financial services | 2010 |
| Torp Easy AS | Wholesale & retail | 2009 |
| Total Hus Bygg AS | Construction | 2019 |
| TPH AS | | 2025 |
| Train to Master Golf Academy AS | Education | 2021 |
| Transport Giganten AS | Transport & logistics | 2023 |
| Tree Solutions AS | Real estate | 2017 |
| Tritese AS | Information & communication | 2024 |
| Trudvang Og Brandsborg AS | Construction | 2008 |
| Truedesign AS | | 2016 |
| Tse Strategies AS | Manufacturing | 2012 |
| Ttholding AS | Construction | 2005 |
| Tunk Holding AS | Real estate | 2012 |
| Tveterjordet Fus Barnehage AS | Education | 2015 |
| TWB Holding AS | | 2019 |
| Ultima Rørservice AS | Construction | 2022 |
| Ulvetid AS | | 2022 |
| Uteglass AS | Construction | 2012 |
| Uteglass Montasje AS | Construction | 2017 |
| Vaew AS | Information & communication | 2024 |
| Var Forvaltning AS | Professional & scientific | 1998 |
| Vegas Konsult AS | | 2025 |
| Veghed AS | Real estate | 2021 |
| Vegvisir Security AS | Information & communication | 2024 |
| Venja Kapital AS | Administrative & support | 2004 |
| Venture Uno AS | Information & communication | 2020 |
| Ventus Invest AS | Real estate | 2024 |
| Veritok AS | Information & communication | 2024 |
| Veronica Invest AS | | 2021 |
| Versa Consultancy AS | Professional & scientific | 2021 |
| Vertigo Holding AS | | 2020 |
| Vetvidere Da | Professional & scientific | 2021 |
| Vidi Holding AS | | 2026 |
| Vinalopo Holding AS | | 2026 |
| Vlatkovic AS | Wholesale & retail | 2024 |
| Voraa Verdi AS | Construction | 2016 |
| VVS Energi AS | Construction | 2012 |
| Vågene Invest AS | | 2015 |
| W Trans Nuf | Transport & logistics | 2019 |