| Tronrud Engineering AS | Manufacturing | 1989 |
| Tronrud Holding Ans | Real estate | 1990 |
| Trygg Hverdag Tjenester AS | Health & social care | 2026 |
| Trygstad AS | Financial services | 2005 |
| Trøgstad Butikkeiendom AS | Real estate | 2009 |
| Trøgstad Handelsbygg AS | Real estate | 2012 |
| Trøstheim Anlegg & Eiendom AS | Real estate | 2005 |
| TT Bilformidling AS | Wholesale & retail | 2021 |
| TT Consult AS | Real estate | 1987 |
| Tudu AS | Information & communication | 2016 |
| Tuft & Babul Da | Transport & logistics | 2015 |
| Tuft & Bergheim Da | Transport & logistics | 2024 |
| Tuft & Iversen Da | Transport & logistics | 2015 |
| Tuft & Johansen Da | Transport & logistics | 2006 |
| Tuft & Langeland Da | Transport & logistics | 2011 |
| Tuft & Lysaker Da | Transport & logistics | 2014 |
| Tuft & Skranefjell Da | Transport & logistics | 2025 |
| Tussa Invest AS | | 2021 |
| TV Ringerike AS | Information & communication | 2017 |
| Tverlandet Handelseiendom AS | Real estate | 2019 |
| Tveter Butikkdrift AS | Wholesale & retail | 1990 |
| Tyri Invest Eiendom AS | Real estate | 2023 |
| Tyrifjord Båtlag SA | Real estate | 1986 |
| Tyrifjord Cruise AS | Transport & logistics | 2004 |
| Tyrifjord Eiendom AS | Real estate | 2015 |
| Tyrimyrveien 10 AS | Real estate | 2016 |
| Tyrimyrveien 13 AS | Real estate | 2017 |
| Tømmerterminal Hauerseter AS | Agriculture & fishing | 2020 |
| Tømrer H.Engen AS | Construction | 2026 |
| Tømrermester G Sætheren AS | Construction | 2003 |
| Tømrermester Kanebog AS | Construction | 2025 |
| Tømrermester Kolstad Og Jansen AS | Construction | 2010 |
| Tømrermester Sandvold AS | Construction | 2006 |
| Tønsberg Butikkeiendom Eik AS | Real estate | 1995 |
| U & S Entreprenør AS | Construction | 2022 |
| Uab David and Co Nuf | Construction | 2012 |
| Ufo Treskelag Da | Administrative & support | 2004 |
| Ullerål Kiosk & Gatekjøkken AS | Hospitality | 2005 |
| Ultvedt Gård Da | Agriculture & fishing | 2012 |
| Ultvetveien 2 AS | Real estate | 2008 |
| Ulvahaugen AS | Real estate | 2021 |
| Ulven Bjørkli Bygg AS | Construction | 2021 |
| Ulven Og Strande AS | Real estate | 2021 |
| Unbranded Solutions AS | Wholesale & retail | 2026 |
| Unilin Norway AS | Wholesale & retail | 1974 |
| Unst Holding AS | Professional & scientific | 2005 |
| Uralensis AS | Professional & scientific | 2022 |
| Urmaker G Grønvold Ans | Wholesale & retail | 1956 |
| Uråd AS | Professional & scientific | 2026 |
| Usnr AB Nuf | Manufacturing | 1996 |
| Usnr AS | Wholesale & retail | 1994 |
| Ust Eiendom AS | Real estate | 2021 |
| Ust Holding AS | Real estate | 2021 |
| Utleiebolig BT 1 AS | Real estate | 2023 |
| Utleiebolig BT 2 AS | Real estate | 2023 |
| V.D Holding AS | | 2026 |
| V.D. Eiendom AS | | 2026 |
| V.Guldmann Nuf | Wholesale & retail | 2019 |
| Vaidas Bygg AS | Construction | 2018 |
| Vaidas Invest AS | Real estate | 2025 |
| Validus AS | Construction | 2023 |
| Vangsvegen Butikkeiendom AS | Real estate | 2017 |
| Vangsveien Handelseiendom AS | Real estate | 2014 |
| Vardar Varme AS | Energy | 2007 |
| Varebileksperten AS | Wholesale & retail | 2025 |
| Varme & Sanitær AS | Construction | 2000 |
| Varme Og Interiør AS | Wholesale & retail | 2007 |
| Vaskehall AS | Other services | 2026 |
| Vastra Gøtaland Mark O Sten Entreprenad Handelsbolag | Agriculture & fishing | 2000 |
| VDW Holding AS | | 2021 |
| Vegård Eiendom AS | Real estate | 2015 |
| Vei Og Eiendom AS | Construction | 2012 |
| Veiby Invest AS | Real estate | 2005 |
| Veiendom AS | Real estate | 2014 |
| Velo-Invest AS | Real estate | 2017 |
| Venbakken Eiendom Ans | Real estate | 2007 |
| Vene AS | Wholesale & retail | 2017 |
| Venner.S Stua Da | Hospitality | 2009 |
| Venåsen Eiendom AS | Construction | 2006 |
| Venåsen Rørservice AS | Construction | 1989 |
| Verdal Butikkeiendom AS | Real estate | 2005 |
| Verdibruket AS | Real estate | 2015 |
| Verkstedveien 14 Hønefoss AS | Construction | 2016 |
| Vesleveien Familiebarnehage AS | Education | 2008 |
| Vesleveien Holding AS | | 2026 |
| Vestern Andelslandbruk SA | Agriculture & fishing | 2021 |
| Vesterngaten Fysioterapi AS | Health & social care | 2013 |
| Vesterntangen AS | Real estate | 2008 |
| Vestnes Handelsbygg AS | Real estate | 2004 |
| Vestre Torv AS | Real estate | 2016 |
| Vestre Torv Utvikling AS | Real estate | 2026 |
| Viken at Market AS | Wholesale & retail | 2015 |
| Viken Bio AS | Agriculture & fishing | 2018 |
| Viken Ctmp AS | Professional & scientific | 2021 |
| Viken Logistikk AS | Transport & logistics | 2015 |
| Viken Renhold AS | Administrative & support | 1998 |
| Viken Skog Holding AS | Manufacturing | 2012 |
| Viken Skog SA | Agriculture & fishing | 2005 |
| Viken Øre-Nese-Hals & Hørselsenter AS | Health & social care | 2020 |
| Viker Handel Da | Wholesale & retail | 1992 |