| Trysilprestige AS | Real estate | 2008 |
| TS Helse AS | Health & social care | 2026 |
| TS Rådgivning Og Rekruttering AS | Administrative & support | 2017 |
| TTT Eiendom AS | Real estate | 2014 |
| Tuen 77 AS | Construction | 2007 |
| Tuen AS | Construction | 2022 |
| Tuen Ventilasjon AS | Construction | 2002 |
| Tuenbygg AS | Real estate | 2007 |
| Tuenveien 58 AS | Real estate | 2021 |
| Tuenveien 64 AS | Real estate | 2009 |
| Tuno Holding AS | | 2018 |
| Tus Holding AS | | 2019 |
| Tvis Kjøkken AS | Wholesale & retail | 1997 |
| Tyrell AS | Information & communication | 2022 |
| Tøft AS | Wholesale & retail | 2017 |
| Tømrer På Hjul AS | Wholesale & retail | 2024 |
| Tømrex AS | Construction | 2024 |
| U Studio AS | Other services | 2023 |
| Ubari Invest AS | | 2024 |
| Udvisor AS | Real estate | 2006 |
| Ullern Alle 41 AS | Real estate | 2015 |
| Unik Hjemmeservice AS | Administrative & support | 2018 |
| Unneberg Transport AS | Transport & logistics | 1989 |
| Up Entreprenør A/S | Construction | 2024 |
| Urban Drive AS | Administrative & support | 2025 |
| Urda Holding AS | | 2024 |
| Urso AS | Information & communication | 2017 |
| Urso Global Trade AS | Wholesale & retail | 2020 |
| Uthuse AS | Wholesale & retail | 2012 |
| Utleiemegleren Lillestrøm AS | Real estate | 2000 |
| V-Baguette AS | Hospitality | 2018 |
| V.M.C. | Professional & scientific | 2012 |
| V8 Ventilasjon AS | Construction | 2014 |
| Va Eksperten AS | Professional & scientific | 2020 |
| Vafin AS | Real estate | 2005 |
| Vaktmester På Hjul AS | Construction | 2025 |
| Vaktmestertjenester Lillestrøm AS | Administrative & support | 2012 |
| Vakuumteknikeren AS | Professional & scientific | 2025 |
| Valar Bygg AS | Construction | 2022 |
| Valkyrien Elektriske AS | Construction | 2005 |
| Vamika AS | Hospitality | 2023 |
| Vand AS | Health & social care | 2020 |
| Vandaoconsult AS | Professional & scientific | 2020 |
| Varming Holding AS | Professional & scientific | 2013 |
| Varskog Invest Limited Nuf | Professional & scientific | 2010 |
| Vastanfors Industrier AB | Wholesale & retail | 1995 |
| Vatlat AS | Construction | 2023 |
| Vedliko AS | Construction | 2026 |
| Vei-Viser'N Trafikkskole AS | Education | 2021 |
| Veiron AS | Information & communication | 2026 |
| Vektor Management AS | Professional & scientific | 2005 |
| Velvetia AS | Agriculture & fishing | 2005 |
| Velvetia Eiendom AS | Real estate | 2023 |
| Venice Holdings AS | Administrative & support | 2009 |
| Venice Norge AS | Administrative & support | 1986 |
| Veno Regnskap AS | Professional & scientific | 2022 |
| Ventilasjon På Hjul AS | Wholesale & retail | 2024 |
| Venus Bar AS | Hospitality | 2023 |
| Vesonus AS | Information & communication | 2025 |
| Vestby Næringspark Eiendom AS | Real estate | 2011 |
| Vestskogen M6 AS | Real estate | 2024 |
| Via Chemicals AS | Wholesale & retail | 2019 |
| Viaggio AS | Hospitality | 2015 |
| Vianor AS | Wholesale & retail | 1984 |
| Viken Bygg & Bad AS | Construction | 2021 |
| Viken Connect AS | Construction | 2016 |
| Viken Hydrogen AS | Manufacturing | 2019 |
| Viken Og Oslo Anlegg AS | Construction | 2019 |
| Vindusspesialisten AS | Construction | 2025 |
| Vindveggen Arkitekter AS | Professional & scientific | 1994 |
| Vingnes Utvikling AS | Real estate | 2018 |
| Vinknes Gruppen AS | | 2025 |
| Vins Invest AS | | 2021 |
| Vintage-Cars AS | Wholesale & retail | 2012 |
| Visimor AS | | 2025 |
| Visivo AS | Professional & scientific | 2019 |
| Vizeo AS | Information & communication | 2013 |
| Vogstgate Eiendom AS | Real estate | 2008 |
| Voldgata 29 AS | Real estate | 2018 |
| Voldgata 58 AS | Real estate | 2010 |
| Volla Bygg & VVS Mester AS | Construction | 2018 |
| Volla Invest AS | Professional & scientific | 1991 |
| Vollaklinikken Holding AS | | 2026 |
| VVS Eksperten AS | Professional & scientific | 2023 |
| VVS Handel AS | Construction | 2023 |
| Vågbø Invest AS | Administrative & support | 2019 |
| Våge Formidling AS | Information & communication | 2013 |
| Vålberg Invest AS | Hospitality | 2019 |
| Vårvika AS | Wholesale & retail | 2013 |
| W Lab AS | Wholesale & retail | 2026 |
| Wader Quality Toys E.K. | Wholesale & retail | 2001 |
| Waldemars AS | Manufacturing | 2016 |
| Waldor AS | | 2017 |
| Walkwithimpact AS | Professional & scientific | 2024 |
| Watec Solutions AS | Professional & scientific | 2016 |
| Wei-Stur AS | Real estate | 2020 |
| Weme Invest AS | | 2012 |
| Werner & Henriksen Ans | Wholesale & retail | 1991 |
| Westby Bjerke Holding AS | Administrative & support | 2018 |
| Westbyes Bensinstasjon AS | Real estate | 1965 |