| Vanberg Eiendom AS | Real estate | 2014 |
| Vanberg Reklame AS | Manufacturing | 1989 |
| Vansjøveien 6 AS | Real estate | 2020 |
| Vantatech | Wholesale & retail | 2012 |
| Varig AS | | 2025 |
| Varmo Kollstad Buene Da | Professional & scientific | 2008 |
| Vaterland Auto AS | Other services | 2004 |
| Vaterland Utvikling Holding AS | Real estate | 2020 |
| Vattøy Holding AS | | 2026 |
| VBN Holding AS | Real estate | 2021 |
| Vedlikehold Og Miljøservice AS | Manufacturing | 2005 |
| Veien Videre AS | Professional & scientific | 2019 |
| Vestre Aker Consulting AS | Professional & scientific | 2013 |
| Vestrem AS | Professional & scientific | 2022 |
| Vestrem Holding AS | Professional & scientific | 2022 |
| Veterinær Haraldsen AS | Professional & scientific | 2021 |
| Veterinær Rannveig Boman AS | Professional & scientific | 2002 |
| Viedu AS | Professional & scientific | 2021 |
| Viken Fjellsprengning AS | Construction | 2017 |
| Viken Flagg Og Profil AS | Professional & scientific | 2021 |
| Viking E&C AS | Construction | 2012 |
| Villatollef AS | Professional & scientific | 2000 |
| Vipa Holding AS | | 2020 |
| Vitea Eiendomsutvikling AS | Real estate | 2019 |
| Vitoria Holding AS | Wholesale & retail | 2005 |
| Voldportgaten 73-1 AS | Real estate | 1990 |
| Voldportgaten Holding AS | Professional & scientific | 2022 |
| Vollawood Film AS | Information & communication | 2010 |
| Vollawood Filmproduksjon AS | Information & communication | 2015 |
| Vongraven Krogh AS | Financial services | 2014 |
| VR Bygg Og Eiendom AS | Construction | 2015 |
| Vulpecula AS | Real estate | 2021 |
| Våge Terapi AS | Health & social care | 2024 |
| Værk AS | Hospitality | 2018 |
| Walborg Gruppen AS | | 2024 |
| Webshop AS | Wholesale & retail | 2018 |
| Wega Medisinske AS | Health & social care | 2016 |
| Wenneberg Bygg AS | Construction | 2014 |
| Whitedot Norge AS | Wholesale & retail | 2014 |
| Why Am I Holding AS | | 2022 |
| Wiggo Andersen Holding AS | Administrative & support | 2005 |
| Wijuna Holding AS | Transport & logistics | 2023 |
| World Fitness AS | Wholesale & retail | 2018 |
| XL Utleie AS | Administrative & support | 2010 |
| Yggdrasil D AS | Real estate | 2016 |
| Yggdrasil M AS | Real estate | 2014 |
| Zwart Arbeid AS | Information & communication | 2015 |
| Zwart Eiendom AS | Real estate | 2014 |
| Ånd Og Vitenskap AS | Education | 2021 |
| Åre Norge AS | Wholesale & retail | 2014 |
| Åskollen 13 Eiendom AS | Real estate | 2021 |
| Ødegård Graving Og Transport AS | Transport & logistics | 2005 |
| Ødegård Maskinutleie AS | Construction | 2019 |
| Øra Invest AS | Financial services | 2012 |
| Øra Trekkeselskap AS | Transport & logistics | 2024 |
| Øraveien 19 AS | Real estate | 2011 |
| Øraveien 23 Næringspark AS | Real estate | 2005 |
| Øraveien Mekaniske Verksted AS | Manufacturing | 2013 |
| Østfold Auto AS | Wholesale & retail | 2021 |
| Østfold Bygg & Innredning AS | Construction | 2025 |
| Østfold Dagligvarer AS | Wholesale & retail | 2014 |
| Østfold Transport Service AS | Transport & logistics | 2023 |
| Østfoldbygg AS | Real estate | 2015 |
| Østsiden Eiendom AS | Real estate | 1958 |
| Østsiden Graveservice AS | Construction | 2022 |
| Østsiden Storsenter AS | Real estate | 2007 |
| Østsiden VVS AS | Construction | 2002 |
| Øts Holding AS | Transport & logistics | 2023 |
| Øystein Ødegård AS | | 2023 |
| Øysæd Invest AS | Information & communication | 2006 |