| Tannlege Gabriella Nagy AS | Health & social care | 2011 |
| Ternen Drift Og Utbygging AS | Construction | 2018 |
| TH Bygg Og Anlegg AS | Construction | 2024 |
| The Old Oak Records AS | Information & communication | 2022 |
| Thelma Invest AS | | 2025 |
| Thor Enoksen AS | Construction | 2002 |
| Thruni AS | Health & social care | 2010 |
| Tonerweb.No AS | Wholesale & retail | 2013 |
| Torer Guitars AS | Manufacturing | 2024 |
| Tradinghouse Da | Administrative & support | 2003 |
| Trygvang AS | Financial services | 2005 |
| TTF Invest AS | Construction | 2018 |
| Tvss AS | Construction | 2016 |
| Tømrerfirma Dahl AS | Construction | 2003 |
| Tømrermester Fredrik Carho AS | Construction | 2020 |
| Ulldotten.No AS | Wholesale & retail | 2022 |
| Unisurvey AS | Professional & scientific | 2025 |
| Uterom AS | Administrative & support | 2006 |
| Valdh AS | Professional & scientific | 2025 |
| Ventproff AS | Construction | 2020 |
| Verdantia AS | | 2025 |
| Verentum Holding AS | | 2026 |
| Veslevarden AS | Professional & scientific | 2024 |
| View Invest AS | Real estate | 2005 |
| Viken Bolig AS | Real estate | 2012 |
| Villasnekkeriet Eiendom AS | Real estate | 2025 |
| Villingstad AS | Wholesale & retail | 2001 |
| Villmarksskolen AS | Administrative & support | 2022 |
| Vinterkveld AS | | 2021 |
| Viraq Invest AS | | 2020 |
| Vollen Elektriske AS | Construction | 2010 |
| Vollen Truck & Parts AS | Wholesale & retail | 1997 |
| Vonstett Media AS | Professional & scientific | 2016 |
| Vordh AS | Professional & scientific | 2025 |
| Vox AS | Information & communication | 2015 |
| Weaas Eiendom AS | Real estate | 2015 |
| Wear Entreprenør AS | Construction | 2008 |
| Wear Maskin AS | Wholesale & retail | 2013 |
| Wibe Invest AS | | 2021 |
| William Entertainment AS | Arts & recreation | 2022 |
| Wow Beauty Salon AS | Other services | 2020 |
| Åge Henriksen AS | Manufacturing | 2018 |
| Økonomisenteret AS | Professional & scientific | 1998 |
| Økonomisenteret Asker AS | Professional & scientific | 2026 |