| Villa Tranen AS | Hospitality | 2020 |
| Villa Zen Garden AS | Manufacturing | 2024 |
| Villazengarden Holding AS | Professional & scientific | 2023 |
| Vilmar AS | Information & communication | 2010 |
| Vilmar Holding AS | Information & communication | 2018 |
| Vingnes Eiendomsutvikling AS | Real estate | 2019 |
| Vingnesenga AS | Real estate | 2001 |
| Vinor Bil Nord AS | Other services | 2025 |
| Vinstra Kraftselskap Da | Energy | 1946 |
| Visione Holding AS | | 2025 |
| Vison Film AS | Information & communication | 2020 |
| Viss Holding AS | | 2026 |
| Viwo Invest AS | | 2021 |
| Voks AS | Health & social care | 2019 |
| Voks Holding AS | Health & social care | 2018 |
| Volt Holding AS | Financial services | 2014 |
| Vrådalsfjellet Anlegg AS | Real estate | 2018 |
| Vrådalsfjellet AS | Real estate | 2018 |
| Vårsetervegen Skogsbilveglag SA | Real estate | 2016 |
| Wallflower Music AS | Information & communication | 2025 |
| Wangens AS | Transport & logistics | 2006 |
| Wardberg Eiendom AS | Real estate | 2011 |
| Wardberg Invest AS | Real estate | 2022 |
| Wasp Import Norway Da | Wholesale & retail | 2006 |
| Wattlet AS | Manufacturing | 2018 |
| Wavy Industries AS | Professional & scientific | 2025 |
| Ways Driving AS | Education | 2021 |
| WB Creative AS | Other services | 2023 |
| Webio AS | Information & communication | 2013 |
| Webiser AS | Information & communication | 2024 |
| Wedum Elektro AS | Construction | 2001 |
| Weng & Mollatt Da | Health & social care | 2020 |
| Widsteen AS | | 2025 |
| Wiesegården Drift AS | Hospitality | 2025 |
| Wiesegården Eiendom AS | Real estate | 2025 |
| Wiesegården Holding AS | | 2025 |
| Wiker Holding AS | | 2025 |
| Wilsesgate 6 AS | Households | 1989 |
| Woofer AS | Administrative & support | 2006 |
| World Expression Forum AS | Administrative & support | 2021 |
| Xelera Consulting AS | Professional & scientific | 2013 |
| Yellow Jersey AS | Information & communication | 2020 |
| Yogalaboratoriet AS | Education | 2018 |
| Yosita Beauty & Spa AS | Other services | 2024 |
| Ågc Invest AS | Real estate | 1989 |
| Åltjern Holding AS | Administrative & support | 2023 |
| Økonomina AS | Professional & scientific | 2024 |
| Ømf Evensen & Evensen AS | Construction | 2002 |
| Øst Invest AS | Real estate | 1969 |
| Østbye & Sletmoen AS | Construction | 2018 |
| Østlandske Alarmtjenester Da | Wholesale & retail | 2003 |
| Østlandske Tjenester AS | Wholesale & retail | 2002 |
| Østlandstakst AS | Real estate | 2013 |
| Østnorsk Filmsenter AS | Public administration | 2004 |
| Øvre Finnsveen Ans | Agriculture & fishing | 2025 |
| Øvre Otta Da | Energy | 2005 |
| Øya Parkering AS | Transport & logistics | 1991 |
| Øyelege Simensen AS | Health & social care | 1993 |
| Øyer Skog AS | Financial services | 2014 |
| Øyerklinikken AS | Health & social care | 2013 |
| Øyvind Rustadstuen Holding AS | | 2024 |