| Steiner AS | | 2025 |
| Stensmyren AS | Administrative & support | 2022 |
| Stig Inn Mjøndalen AS | Hospitality | 2025 |
| Stig-Inn AS | Hospitality | 2020 |
| Strandveien 18 AS | Real estate | 2005 |
| Strandveien 33 AS | Real estate | 2022 |
| Strandveien 37-41 AS | Real estate | 2010 |
| Strandveien 7 Eiendom Da | Real estate | 1992 |
| Strandveien Tuning AS | Other services | 2019 |
| Strikkefryd AS | Wholesale & retail | 2016 |
| Stryken Holding AS | Real estate | 2020 |
| Strøm Gundersen AS | Construction | 1991 |
| Studio Oak AS | Manufacturing | 2025 |
| Studio Røe AS | Other services | 2023 |
| Stupe AS | Information & communication | 2022 |
| Ståle Hansen Graveservice AS | Construction | 2023 |
| Sunpower AS | Construction | 2025 |
| Svein Roar Andersen AS Murmester- Entreprenørforretning | Construction | 1990 |
| Svein Sveum AS | Professional & scientific | 2014 |
| Svenne AS | Professional & scientific | 2005 |
| Sylte Tech AS | Professional & scientific | 2014 |
| Sømme Eiendom AS | | 1997 |
| Sørøst Eiendom AS | Real estate | 2012 |
| Tak Over Hodet Da | Real estate | 2000 |
| Takst&Eiendomsverdi AS | Real estate | 2025 |
| Tankespranget AS | Administrative & support | 1989 |
| Tannlege Jevnaker Medalen AS | Health & social care | 2025 |
| Tannlege JM AS | Health & social care | 2026 |
| Tannlege Silje C E Vesterdal AS | Health & social care | 2000 |
| Tasa Invest AS | Real estate | 2012 |
| Tennisbane-Spesialisten Da | Administrative & support | 2024 |
| Terje Gudbrandsen Forskaling AS | Construction | 2000 |
| Termoxpress AS | Transport & logistics | 2012 |
| TGF Holding AS | Construction | 2005 |
| TGS Holding AS | | 2005 |
| Thomas Agerup Holding AS | | 2024 |
| Thorbjørnsen Bygg AS | Construction | 2024 |
| Thurio Eiendom AS | Financial services | 2001 |
| Tjugum AS | Administrative & support | 2016 |
| Tom Stenseth Andersen AS | Construction | 2020 |
| Top Invest AS | Real estate | 2016 |
| Tor Eriksen Rengjøring AS | Administrative & support | 1980 |
| Traumeinformert Samfunn AS | Health & social care | 2024 |
| Treat AS | Professional & scientific | 2021 |
| Trendway AS | Wholesale & retail | 2021 |
| Treningsdrift AS | Arts & recreation | 2024 |
| Tresnekkern Da | Construction | 2025 |
| Troax Nordic AS | Construction | 1973 |
| Trollgrillene AS | Hospitality | 2023 |
| Tron Gevelt Consulting AS | Construction | 2022 |
| Tron Gevelt Holding AS | Construction | 2005 |
| Trulsen Invest AS | | 2024 |
| Tryggauto AS | Wholesale & retail | 2026 |
| Tudor Kafe AS | Hospitality | 2026 |
| TV Vision Heaven AS | Information & communication | 2022 |
| TV Visjon Norge AS | Information & communication | 2003 |
| Tys Holding AS | Financial services | 2015 |
| Tømrer Fjellheim AS | Construction | 2022 |
| Tømrermester Jørn André Haug AS | Construction | 2012 |
| Ulsten Consulting AS | Professional & scientific | 2020 |
| Unoquip GmbH Norway Nuf | Wholesale & retail | 2023 |
| Vaktmester Gjerdingen AS | Administrative & support | 2023 |
| Varg Natur & Spenningsopplevelser Da | Administrative & support | 2000 |
| Varme Holding AS | Wholesale & retail | 2019 |
| Vegard Holmen Holding AS | Wholesale & retail | 2012 |
| Velano AS | Wholesale & retail | 2025 |
| Vendibo AS | Professional & scientific | 2023 |
| Vestsia AS | Arts & recreation | 2005 |
| Vestviken Eiendom AS | Real estate | 2020 |
| Veveriet Eiendom II AS | Real estate | 2005 |
| VIK1 Forvaltning AS | Construction | 2020 |
| Viking El Avdeling Drammen AS | Construction | 2024 |
| Viking Gruppen AS | Real estate | 2000 |
| Vikingvask AS | Wholesale & retail | 2019 |
| Vin AS | | 2014 |
| Vix Elektro AS | Construction | 2025 |
| Vox Mjøndalen AS | Other services | 2012 |
| VVS Patrulje AS | Construction | 2019 |
| Våtromspesialisten AS | Construction | 2024 |
| Walther Kristiansen AS | Wholesale & retail | 1981 |
| We-Holding AS | Wholesale & retail | 2024 |
| Wentworth Property Partners for Spa Resort AS | Real estate | 2018 |
| West' AS | Real estate | 2012 |
| West' Entreprenør AS | Construction | 2005 |
| Wigen Invest AS | | 2021 |
| Wildeny Invest AS | Financial services | 2005 |
| Wille & Sand Forsikringspartner AS | Financial services | 2013 |
| Wilting Holding AS | Information & communication | 2019 |
| WLC Norge AS | Information & communication | 2024 |
| Woven AS | Wholesale & retail | 2023 |
| Wulfsberg AS | | 2020 |
| Xpert VVS Og Bad AS | Construction | 2026 |
| Yellowdot Brands AS | | 2023 |
| Yrkesfag Senteret SA | Education | 2014 |
| Zmart Eiendom AS | Real estate | 2026 |
| Zoyou AS | Professional & scientific | 2016 |
| Åsen Utvikling AS | Construction | 2020 |
| Ø.I.Holding AS | Construction | 2010 |
| Øk-Tek AS Eiendomsforvaltning | Real estate | 1998 |
| Øst Alarmtjenester AS | Construction | 2025 |