| Strategy Works Partners AS | Professional & scientific | 2026 |
| Stålhallen Bygg AS | Construction | 2019 |
| Sustainor AS | | 2020 |
| Taaent Holding AS | Real estate | 2014 |
| Talent to Value AS | Professional & scientific | 2023 |
| Talk to Eve AS | Information & communication | 2023 |
| Technical Apparel and Equipment AS | Wholesale & retail | 2025 |
| Tek Miljø AS | Construction | 2023 |
| Terje Lilleseth IT Consulting AS | Information & communication | 2014 |
| The Investment AS | | 2021 |
| The Tuv AS | Wholesale & retail | 2005 |
| Three Gems Holding AS | Financial services | 2015 |
| Tine Holding AS | | 2026 |
| TJC-3 AS | Professional & scientific | 2024 |
| Tjenester Og Produkter AS | Other services | 2019 |
| TKS International AS | Professional & scientific | 2019 |
| Tomcat Consulting and Investment AS | Information & communication | 2019 |
| Tommy Schønberg AS | Information & communication | 1998 |
| Tonheim Boliginvest AS | Real estate | 2024 |
| Treningsformidling AS | Information & communication | 2018 |
| TS Prosjekt & Logistikk AS | Transport & logistics | 2025 |
| Turnkey Recruitment AS | Administrative & support | 2022 |
| Tømrermester Jan H. Norbeck Entreprenørforretning AS | Construction | 2004 |
| Ulven Invest AS | | 2022 |
| Unnis Dansestudio U & I Ans | Education | 2003 |
| Vaffelninja AS | | 2014 |
| Vallerud Invest AS | Financial services | 2018 |
| Valueit AS | Information & communication | 2018 |
| Verdandi Technologies AS | Information & communication | 2026 |
| Vesima AS | Real estate | 1984 |
| Viken Bygg & Malerservice AS | Construction | 2022 |
| Ville Gleder AS | Education | 2018 |
| Vinndrift AS | Arts & recreation | 2020 |
| Vitho AS | Professional & scientific | 2012 |
| Von Ubisch Ans | Real estate | 2010 |
| Vör Labs AS | Information & communication | 2026 |
| Wafol AS | | 2022 |
| Warp AS | Information & communication | 2025 |
| Wefix Media AS | Professional & scientific | 2022 |
| Wetalk AS | Education | 2015 |
| Wfa AS | Professional & scientific | 2020 |
| Wist Invest AS | | 2023 |
| WMK Invest AS | | 2021 |
| Wrleading Group AS | Wholesale & retail | 2018 |
| Xor Is My Crypto AS | Financial services | 2018 |
| Yae AS | | 2026 |
| ZR Transport AS | Transport & logistics | 2024 |
| Ørnebo Holding AS | Real estate | 2005 |
| Østlandske Aktiva AS | Real estate | 2019 |
| Østlandske Næringseiendom AS | Real estate | 2021 |