| Tb-Invest AS | Financial services | 2005 |
| Tech Insights AS | Wholesale & retail | 2020 |
| Techconsil AS | Information & communication | 2024 |
| Teko Holding AS | | 2020 |
| Tekstehuset AS | Information & communication | 2021 |
| Telling Holding AS | Financial services | 2015 |
| Ternary AS | Information & communication | 2018 |
| Teufelberger GmbH | Wholesale & retail | 1999 |
| Think Trafikk AS | Education | 2002 |
| THK Invest AS | Real estate | 2008 |
| Tima AS | Construction | 2006 |
| Tiril Holding AS | | 2020 |
| Tjua Holding AS | | 2024 |
| TK Accounting AS | Professional & scientific | 2026 |
| To Skruer AS | Construction | 2017 |
| To Skruer Eiendom AS | Real estate | 2020 |
| Tom Holmen AS | Real estate | 2000 |
| Tom Scott AS | | 2022 |
| Tore Johan AS | | 2021 |
| Tormod Tvinnereim Invest AS | Real estate | 2018 |
| Tornerose Holding AS | | 2026 |
| Torsnesveien 207 Eiendom AS | Wholesale & retail | 2012 |
| Tosh Invest AS | Financial services | 2018 |
| Totco AS | Professional & scientific | 2007 |
| Tp-Invest AS | Financial services | 2005 |
| TR Prosjekt AS | Real estate | 1998 |
| Tre I Bygg AS | Construction | 1991 |
| Trekanten 6 Eiendom AS | Real estate | 2012 |
| Tri Tip AS | | 2020 |
| Trident Investment AS | | 2022 |
| Trollåsen Legeservice AS | Health & social care | 2008 |
| Trost AS | Professional & scientific | 2024 |
| Truenorth Norway AS | Information & communication | 2015 |
| Trygg Bilmegling AS | Wholesale & retail | 2017 |
| Trygg Eiendom AS | Real estate | 2012 |
| Trygg Property AS | Real estate | 2020 |
| TT Eiendomsinvest AS | Real estate | 2017 |
| Tysnes Holm AS | Information & communication | 2012 |
| Tømrermester Ringen AS | Construction | 2026 |
| Tømrermester Rolf Johannessen AS | Real estate | 2005 |
| Tømteveien 1-3 AS | Real estate | 2014 |
| Tømteveien 8 AS | Real estate | 2004 |
| Urban Management Og Bemannings Byrå Nuf | Administrative & support | 2010 |
| Urtica AS | Professional & scientific | 1995 |
| Ustø AS | | 2023 |
| Vaarin AS | Administrative & support | 2023 |
| Vamnesinvest AS | | 2023 |
| Vanti AS | Real estate | 1987 |
| Veenner AS | Information & communication | 2018 |
| Veihus AS | Construction | 2020 |
| Vent Du Sud AS | Wholesale & retail | 2025 |
| Verkslia Eiendom AS | Real estate | 2023 |
| Veslehaugen Consulting AS | Financial services | 2017 |
| Vest Helseklinikk AS | Health & social care | 2026 |
| Vesttind AS | Real estate | 2007 |
| VGV Invest AS | Real estate | 2023 |
| Viatura AS | Real estate | 1994 |
| Vikarkompaniet AS | Administrative & support | 2014 |
| Viken Advokatene AS | Professional & scientific | 2021 |
| Viken Auto AS | Wholesale & retail | 2019 |
| Viken Trafikkskole AS | Education | 2022 |
| Villa Heidi AS | Hospitality | 2018 |
| Viltungla AS | Health & social care | 2024 |
| Vinsto AS | | 2009 |
| Vintage Vélo Oslo AS | Other services | 2020 |
| Vita Smil Tannlegesenter AS | Health & social care | 2024 |
| Viva Solutions AS | Professional & scientific | 2024 |
| VK Newco AS | | 2026 |
| VK Rekruttering AS | Administrative & support | 2021 |
| Voll Water AS | Wholesale & retail | 2020 |
| Voll Water Invest AS | | 2021 |
| Von Der Lippe AS | Real estate | 2007 |
| Vonc AS | Information & communication | 2021 |
| VT Eiendom (Holding) AS | Financial services | 1990 |
| Walco Invest AS | Financial services | 2020 |
| Walma Invest AS | | 2022 |
| Wealth Creation AS | Professional & scientific | 2014 |
| Wema Kjøp Og Salg AS | Wholesale & retail | 1992 |
| Wenche Rasch Konsult AS | Professional & scientific | 2020 |
| Wesoma Holding AS | Real estate | 2022 |
| Western Metals AS | Wholesale & retail | 1988 |
| Whistler Oppned AS | Financial services | 2005 |
| Wider Holding AS | | 2015 |
| Wifo AS | Professional & scientific | 2012 |
| Wilmer Gruppen AS | | 2026 |
| Wineheaven AS | Wholesale & retail | 2016 |
| Wines Consulting AS | Professional & scientific | 2007 |
| Wmi Investment AS | Real estate | 2001 |
| X2A Holding AS | Real estate | 2019 |
| Xchange No Ans | Wholesale & retail | 2000 |
| Yes Vi Leker Kolbotn AS | Wholesale & retail | 2018 |
| Ymt Consulting AS | Information & communication | 2015 |
| Yolo Events AS | Administrative & support | 2015 |
| Ypn Group AS | Professional & scientific | 2022 |
| Yre Eiendom AS | Real estate | 2019 |
| Ys Sollien Holding AS | | 2020 |
| Zad AS | Transport & logistics | 2019 |
| Zeracryl AS | Professional & scientific | 2007 |
| Zombrero AS | Financial services | 2005 |
| Årvold Park AS | Real estate | 2006 |