| Tandberg Oppmåling AS | Professional & scientific | 2008 |
| Terminalen 18 AS | Real estate | 2024 |
| Tesla Problem Service 777 AS | Other services | 2024 |
| Thomas Remme Holding AS | | 2020 |
| Tickgarden AS | Information & communication | 2016 |
| Tide Energi AS | Professional & scientific | 2026 |
| Tilsynstjenesten Eiendom AS | Real estate | 2009 |
| Tonny Tollefsen Eiendom AS | Real estate | 2005 |
| Topp Renhold Da | Administrative & support | 2001 |
| Tov Hasler Tovsen AS | Professional & scientific | 1995 |
| Trailer Utleie Og Transporttjenester Da | Administrative & support | 2023 |
| Tranby Barnehage SA | Education | 2001 |
| Tranby Bygg & Sanering AS | Construction | 2016 |
| Tranby Dyreklinikk AS | Professional & scientific | 2021 |
| Tranby Entreprenør Utleie AS | Administrative & support | 2018 |
| Tranby Grunneierlag SA | Real estate | 2018 |
| Tranby Legesenter Da | Health & social care | 2006 |
| Tranby Tannlegesenter AS | Health & social care | 2017 |
| Tranby Tømrerne AS | Construction | 2018 |
| Trelease Consulting AS | Professional & scientific | 2019 |
| Trustme - Ed A/S | Education | 2016 |
| TT Rør AS | Construction | 2018 |
| Tveitehaug Holding AS | Professional & scientific | 2020 |
| Tømrer Terje AS | Construction | 2017 |
| Tønnaas Invest AS | Construction | 2023 |
| Ulle Invest AS | Wholesale & retail | 2025 |
| Unimech AS | Other services | 2023 |
| Uteplass Bygg & Vedlikehold AS | Administrative & support | 2023 |
| V Prod AS | Arts & recreation | 2021 |
| Vadhald Sjømat AS | Wholesale & retail | 1991 |
| Valar Holding AS | | 2022 |
| Vannmeisling AS | Construction | 2016 |
| Varpakast AS | Real estate | 2022 |
| Vebnovi AS | | 2013 |
| Veimar Rådgivning Og Eiendom AS | Professional & scientific | 2022 |
| Vennelsborg Holding AS | Professional & scientific | 2005 |
| Veriscan Security AS | Information & communication | 2012 |
| Vern Risk Management AS | Professional & scientific | 2017 |
| Vetpharma AS | Wholesale & retail | 1990 |
| Vfa AS | Construction | 2023 |
| Viken Begravelsesbyrå AS | Other services | 2014 |
| Vip Dog Products AS | Wholesale & retail | 2006 |
| Vislie Invest AS | Real estate | 2005 |
| Vlys AS | Wholesale & retail | 2022 |
| VSP Holding AS | Construction | 2008 |
| VTS Elektro AS | Construction | 2022 |
| Wam Traktorservice AS | Wholesale & retail | 2014 |
| Wellness Superior Ans | Wholesale & retail | 2002 |
| Westby AS | Professional & scientific | 2018 |
| Woodvibe AS | Manufacturing | 2022 |
| Worldwide Watches & Jewelry AS | Wholesale & retail | 2023 |
| Yfh Holding AS | Construction | 2016 |
| Yul AS | | 2026 |
| Zonda Invest AS | Real estate | 2020 |
| Åsheim Investment AS | Construction | 2012 |
| Øvre Sørsdal AS | | 2023 |