| Tod Bygg Og Anlegg AS | Construction | 2015 |
| Tomara AS | Real estate | 2005 |
| Tomt Holding AS | Real estate | 2006 |
| Tone Frisør AS | Other services | 2013 |
| Tone Nordhagen AS | Professional & scientific | 2024 |
| Toppen Industripark 14 AS | Real estate | 2020 |
| Toppenhaug Samdrift Da | Agriculture & fishing | 2001 |
| Tordenstjerne Eiendom AS | Real estate | 2022 |
| Torgersen Mat Og Pølsemakeri AS | Manufacturing | 1982 |
| Torgersen Utleiebygg AS | Real estate | 1998 |
| Trafo Holding AS | Manufacturing | 2011 |
| Trening for Deg Hokksund AS | Arts & recreation | 2014 |
| Tres Hermanas Import Co. AS | Wholesale & retail | 2022 |
| Trippel AS | Real estate | 2022 |
| Trofana AS | Real estate | 2019 |
| Trondheimsvegen 144 AS | Real estate | 2023 |
| TTK Eiendom AS | Real estate | 2025 |
| Tueai-Tun Holding AS | | 2022 |
| Tur Mat AS | Wholesale & retail | 2019 |
| TV Bygg AS | Construction | 2012 |
| Tveten Gård Hageservice AS | Administrative & support | 1994 |
| TWG Anlegg AS | Construction | 2016 |
| Text & Design as | Professional & scientific | 1986 |
| Tømrer Espen Bakke AS | Construction | 2020 |
| Tømrer Håvard Fjerdingstad AS | Construction | 2021 |
| Tømrer Kjetil Lie Haugen AS | Construction | 2016 |
| Tømrer Tommy Sæterli AS | Construction | 2014 |
| Uggla Holding AS | | 2019 |
| Ullern AS | | 2020 |
| Ullernskogen Utvikling AS | Real estate | 2021 |
| Unicare Hokksund AS | Health & social care | 1990 |
| Unigrav AS | Construction | 2017 |
| Unik Norway AS | Wholesale & retail | 2023 |
| Unisport Scandinavia AS | Wholesale & retail | 2006 |
| United North AS | Professional & scientific | 2023 |
| Utheim Innovation AS | Wholesale & retail | 2018 |
| Utleiegutta Eiendom AS | Real estate | 2025 |
| V-S Holding AS | | 2026 |
| Vafos Industrieiendom AS | Real estate | 2013 |
| Valuta Grill Ltd Nuf | Hospitality | 2009 |
| Vanebo AS | Construction | 2012 |
| Vanebo Aviation AS | Real estate | 2012 |
| Vanebo Equipment AS | Administrative & support | 2013 |
| Vanebo Holding AS | Real estate | 2005 |
| Vanebo Properties AS | Real estate | 2007 |
| VARD1 AS | Real estate | 1991 |
| Vardfjell AS | Financial services | 2013 |
| Varepartner AS | Wholesale & retail | 2010 |
| Varg Eiendom AS | Real estate | 1993 |
| Varlo Grendehus SA | Real estate | 1982 |
| Vav AS | | 2026 |
| VBS AS | Construction | 2026 |
| Veierland AS | Real estate | 2012 |
| Veilaget Åletjernveien- Røkebergtjern SA | Real estate | 1978 |
| Vemork AS | Real estate | 2014 |
| Venturis AS | Information & communication | 2020 |
| Venturis Holding AS | Professional & scientific | 2017 |
| Verdi AS | | 2014 |
| Verdi Eiendom AS | Real estate | 2011 |
| Verksveien AS | Real estate | 2024 |
| Versvikvegen Eiendom AS | Real estate | 2014 |
| Vestfjeld AS | Professional & scientific | 2016 |
| Vestfossen Elvepark AS | Real estate | 2018 |
| Vestfossen Innkjøpslag AS | Real estate | 2011 |
| Vestre Brugate 5 AS | Real estate | 2017 |
| Vestre Nøstegate 21 AS | Real estate | 1984 |
| Vestviken Betong & Tre AS | Construction | 2017 |
| Vestviken Entreprenør AS | Construction | 2016 |
| Vestviken Gruppen AS | Construction | 2020 |
| Vestviken Håndverk AS | Construction | 2020 |
| Veteranflygruppa DFK SA | Arts & recreation | 2017 |
| Vevi Eiendom AS | Real estate | 2019 |
| Vexxt Kompetanse AS | Education | 2025 |
| Vfla AS | | 2021 |
| VG Montasje AS | Manufacturing | 2013 |
| Viken Bodutleie AS | Real estate | 2018 |
| Viken Sol AS | Construction | 2005 |
| Viken Urologi AS | Health & social care | 2025 |
| Viken Utleie AS | Administrative & support | 2018 |
| Vilico AS | Construction | 2005 |
| Vinsvoll Invest AS | | 2012 |
| Vister Service AS | Transport & logistics | 2022 |
| Vistig AS | Administrative & support | 2026 |
| Vistula Gruppen AS | Construction | 2020 |
| Vni Imp Exp AS | Wholesale & retail | 2021 |
| Voldstadveien Holding AS | Arts & recreation | 2018 |
| Vox Hokksund AS | Other services | 2012 |
| Vrabel AS | | 2021 |
| Vvekt AS | Health & social care | 2024 |
| Waaberg Eiendom AS | Construction | 2012 |
| Waterwell AS | Wholesale & retail | 2009 |
| Wego Invest AS | | 2022 |
| Weum AS | Construction | 2023 |
| Weum Holding AS | Real estate | 2006 |
| Wikheim Holding AS | | 2026 |
| Ytongveien 18 AS | Real estate | 2019 |
| Zetterstrøm & Aarkvisla AS | Construction | 1994 |
| Zijdemans Consult AS | Construction | 2017 |
| Zoomarkedet Eiker Senter AS | Wholesale & retail | 2013 |
| ZTR AS | Construction | 2024 |