| Somnomed Nordic AB | Wholesale & retail | 2013 |
| SPR AS | Other services | 2022 |
| Staavi Invest AS | | 2022 |
| Stabekkbilsenter AS | Other services | 2002 |
| Storms AS | Manufacturing | 1964 |
| Studio Ophelia AS | Other services | 2023 |
| Ståvikroken AS | | 2008 |
| Swot AS | Professional & scientific | 2007 |
| T.N.T Invest AS | | 2026 |
| Tasca AS | Hospitality | 2022 |
| Tci Nuf | Real estate | 2010 |
| Teglverket Eiendom AS | | 2018 |
| Teknikk AS | Wholesale & retail | 1998 |
| TGL 523 Holding AS | | 2023 |
| The Invest AS | Professional & scientific | 2005 |
| Themis AS | | 2020 |
| Thunberg Transport Oslo AS | Transport & logistics | 2016 |
| Tiger Norway AS | Wholesale & retail | 2026 |
| Tofthagen Rasmussen Ans | Wholesale & retail | 1992 |
| Topwash Vøyenenga Bilpleie AS | Other services | 2014 |
| Tores Motorservice AS | Wholesale & retail | 2002 |
| Tosha's Bodyshop AS | Wholesale & retail | 2006 |
| Tove De Langes Bunadsbånd AS | Wholesale & retail | 2022 |
| Tranby AS | Administrative & support | 2003 |
| Tranby Greencare AS | Administrative & support | 2026 |
| Tresag Norge | Professional & scientific | 2005 |
| Trio Bil AS | Wholesale & retail | 2015 |
| TSS Travel Service Scandinavia AS | Administrative & support | 2012 |
| Ttveiten Holding AS | | 2026 |
| Tundra Venture AS | | 2022 |
| Tveiager Da | Agriculture & fishing | 2018 |
| Tveitan-Gruppen AS | Real estate | 1998 |
| Tysk Trehus AS | Construction | 2018 |
| Tømrermester Eirik Amundsen AS | Construction | 2015 |
| Tømrermester Espen Claussen AS | Construction | 2015 |
| Va Banque AS | Financial services | 2005 |
| Valhalla Betong AS | Construction | 2025 |
| Varmepumpe Energy AS | Construction | 2019 |
| Verde Rekruttering AS | Administrative & support | 2023 |
| Vestmarka AB Nuf | Agriculture & fishing | 2014 |
| Veterinærdeg AS | Professional & scientific | 2012 |
| VGN Holding AS | | 2025 |
| Vik Invest AS | | 1974 |
| Viksetra Holding AS | | 2019 |
| Vinoma AS | Professional & scientific | 2023 |
| Voss Alpin AS | Real estate | 2010 |
| Vsa Consultant AS | Information & communication | 2020 |
| VVS, Varme Og Energi AS | Construction | 2021 |
| Vøyen Fus Barnehage AS | Education | 2019 |
| Vøyen Graveservice AS | Construction | 2023 |
| Vøyeneng Mat AS | Hospitality | 2026 |
| Vøyenenga Frukt & Grønt AS | Wholesale & retail | 2024 |
| Vøyenenga Legekontor Da | Health & social care | 2012 |
| Vøyenenga Rør AS | Construction | 2010 |
| W-Service AS | Administrative & support | 2025 |
| Webctrl AS | Information & communication | 2021 |
| Weststar Management Services AG | Professional & scientific | 2012 |
| Willelin AS | Professional & scientific | 2014 |
| Willowhill Investment Ltd Nuf | Information & communication | 2009 |
| XT Sandvika AS | Arts & recreation | 2013 |
| Youngdeer Engineering GmbH | Administrative & support | 2010 |
| Ysl Holding AS | Wholesale & retail | 2018 |
| Zubi Holding AS | Wholesale & retail | 2022 |
| Østkran AS | Transport & logistics | 2011 |