| Tømmerkaia AS | Real estate | 2016 |
| Tømmerstø Brygge AS | Wholesale & retail | 1981 |
| Tønnes Klungland Holding AS | | 2026 |
| Tønnes Willoch AS | Real estate | 2008 |
| Tønnesen Gruppen AS | Real estate | 2009 |
| Tønnesen Rustfritt & Stål AS | Manufacturing | 2022 |
| Tønnessen Holding AS | Financial services | 2005 |
| Tønnevoldsgate 30 AS | Real estate | 1973 |
| Tørå Yuan Holding AS | | 2021 |
| Uab Norbyga | Construction | 2009 |
| Uav-Planner AS | Information & communication | 2024 |
| Ubostad Furnes Holding AS | | 2021 |
| Ufo Eiendom AS | Education | 2002 |
| Ugland Bygg AS | Wholesale & retail | 2024 |
| Uglen Holding AS | | 2005 |
| Ulefossveien 48 AS | Real estate | 2000 |
| Ulrikke Trydal Invest AS | | 2025 |
| Ultera Invest AS | | 2009 |
| Uluu AS | Wholesale & retail | 2026 |
| Ulvseth Holding AS | Real estate | 2013 |
| Umoe Advanced Composites AS | Manufacturing | 2007 |
| Unac AS | Wholesale & retail | 2005 |
| Undheim Bil & Maskin AS | Other services | 2025 |
| Undreverkstedet AS | Manufacturing | 2024 |
| Ungt Medborgerskap AS | Information & communication | 2024 |
| Unhjem Eiendomsutvikling Sør AS | Real estate | 2022 |
| Unhjem Holding AS | Construction | 2022 |
| Unicode AS | Education | 2024 |
| Unifon AS | Information & communication | 2004 |
| Unifon Holding AS | Information & communication | 2020 |
| Unifon Salg AS | Information & communication | 2019 |
| Unik Klinikk AS | Health & social care | 2015 |
| Unik Rengjøring Da | Administrative & support | 2011 |
| Unik Streetfood AS | Hospitality | 2021 |
| Unik Visuell AS | Professional & scientific | 2019 |
| Uniqus AS | Construction | 2021 |
| Unity Consulting AS | Real estate | 2021 |
| Univent Kristiansand AS | Construction | 2007 |
| Unni Mesel Holding AS | | 2020 |
| Uno Bygg AS | Construction | 1998 |
| Unplugged AS | Manufacturing | 2003 |
| Upenor AS | Professional & scientific | 2022 |
| Uppen Scene Og Musikk AS | Arts & recreation | 2019 |
| Upstairs AS | Wholesale & retail | 1982 |
| UPTO88 AS | Arts & recreation | 2021 |
| Urban Fitness AS | Education | 2020 |
| Urdal Invest AS | | 2024 |
| Urnes Invest AS | | 2025 |
| Urologi Sør AS | Health & social care | 2021 |
| Urspesialisten AS | Other services | 2016 |
| Urspesialisten Vintage AS | Wholesale & retail | 2024 |
| Ustaoset Leiligheter 1-8 AS | Real estate | 2018 |
| Ustaoset Utvikling AS | Real estate | 2013 |
| Utemiljø Holding AS | | 2026 |
| Utkast AI AS | Information & communication | 2025 |
| Utleiekongen Eiendom AS | Real estate | 2024 |
| Utleiemegler Norge AS | Real estate | 2026 |
| Utleiemegler Sør AS | Real estate | 2020 |
| Utleieoversikten AS | Information & communication | 2024 |
| Utleieprodukter AS | Administrative & support | 1997 |
| Utstyrlager AS | Wholesale & retail | 2024 |
| Utvendig Renhold AS | Administrative & support | 2020 |
| Utvikleren.Site AS | Information & communication | 2025 |
| Utviklerne AS | Information & communication | 2006 |
| Uve AS | Professional & scientific | 2010 |
| V&P Nordic AS | | 2026 |
| V&W Consulting AS | Professional & scientific | 2013 |
| V&W Invest AS | Real estate | 2017 |
| Vaabo AS | Information & communication | 2023 |
| Vabo Holding AS | Professional & scientific | 2021 |
| Vabo Teknikk AS | Professional & scientific | 2022 |
| Vabua Bolig AS | Real estate | 2025 |
| Vabua Invest AS | Real estate | 2023 |
| Vabua Park AS | Real estate | 2024 |
| Vabua Utvikling AS | Real estate | 2013 |
| Vadfoss AS | Information & communication | 2017 |
| Vah AS | Real estate | 2019 |
| Vaicay AS | Real estate | 2026 |
| Vaicay Design & Service AS | Administrative & support | 2026 |
| Vajola AS | Arts & recreation | 2025 |
| Vakker Hud AS | Wholesale & retail | 2016 |
| Vakre Valkyrien Holding AS | | 2018 |
| Vakt Holding AS | Real estate | 2012 |
| Vakthold AS | Administrative & support | 2004 |
| Vaktmester 24 AS | Administrative & support | 2014 |
| Vaktmester Sør Anlegg AS | Administrative & support | 2020 |
| Vaktmesterservice Sør AS | Administrative & support | 2017 |
| Vallehei AS | Wholesale & retail | 2012 |
| Vallesverd Bilforretning A/S | Other services | 1977 |
| Valsgården AS | Real estate | 2005 |
| Valst AS | Wholesale & retail | 2017 |
| Valsviga AS | | 2005 |
| Value to the People AS | Professional & scientific | 2018 |
| Valuemakers AS | Professional & scientific | 2020 |
| Valutto AS | Information & communication | 2025 |
| Vamløv Holding AS | Real estate | 2025 |
| Vamvoukos Invest AS | Administrative & support | 2013 |
| Vand Connect AS | Information & communication | 2020 |
| Vand Dialog AS | Professional & scientific | 2013 |
| Vannlaboratoriet AS | Professional & scientific | 2007 |