| Trimveien Legesenter AS | Health & social care | 2015 |
| Tropus AS | Information & communication | 2025 |
| Trosster Shipping Partners Ans | | 1990 |
| Tung Vekst AS | Information & communication | 2013 |
| Tuven Tannklinikk AS | Health & social care | 2021 |
| Tveiten AS | Financial services | 2017 |
| Tvilum AS | Wholesale & retail | 2018 |
| Tømmerstigen AS | Real estate | 2006 |
| Ultrabody Holmestrand AS | Other services | 2015 |
| Unident AS | Wholesale & retail | 1983 |
| Unik AS | Wholesale & retail | 2012 |
| United Wine, Beer & Spirits AS | Wholesale & retail | 2017 |
| Uslugi Remontowo-Budowlana Banaszak Slawomir | Construction | 2007 |
| Utcon Byggservice AS | Construction | 2026 |
| Utter AS | Information & communication | 2023 |
| V&G Tjenester AS | Administrative & support | 2020 |
| V&V Yoga AS | Education | 2024 |
| Vaktmestersentralen AS | Professional & scientific | 2018 |
| Valenwave Enterprise AS | Professional & scientific | 2024 |
| VALL-07 SA | Water & waste | 2007 |
| Vanessa Eiendom AS | Real estate | 2019 |
| Varde Solutions AS | Information & communication | 2026 |
| VBK Nordic AS | Manufacturing | 1997 |
| Vektergården Legesenter AS | Health & social care | 2005 |
| Veniz Restaurant AS | Hospitality | 2021 |
| Ventech Energisystemer AS | Construction | 2026 |
| Veps Holding AS | Real estate | 2018 |
| Verftsbassenget 3 AS | Real estate | 2013 |
| Verita Invest AS | | 2020 |
| Veritas Invest AS | Financial services | 2015 |
| Very Merch AS | Professional & scientific | 2026 |
| Verzatile Dancestudio AS | Education | 2024 |
| Vestfold Boligtakst AS | Real estate | 2026 |
| Vestfold Boligutleie AS | Real estate | 2000 |
| Vestfold Budservice Da | Transport & logistics | 1994 |
| Vestfold Byggetjenester AS | Administrative & support | 2021 |
| Vestfold Grønt AS | Wholesale & retail | 1986 |
| Vestfold Salgstjenester Ans | Administrative & support | 2000 |
| Vesttech Consulting Da | Information & communication | 2000 |
| Vetech Engineering AS | Professional & scientific | 2002 |
| Vetech Holding AS | | 2022 |
| Vialli AS | Real estate | 2025 |
| Viaticus Ans | Financial services | 2008 |
| Vibo Holding AS | Real estate | 2021 |
| Vicidata AS | Professional & scientific | 2019 |
| Viken Buskerud Taxi AS | Transport & logistics | 2013 |
| Viken Eiendomsutvikling AS | Real estate | 2002 |
| Viken Maskin Ans | Construction | 2001 |
| Viken Taxi Horten Da | Transport & logistics | 2009 |
| Vilje Industri AS | Professional & scientific | 2010 |
| Vilje Prosjekttjenester AS | Information & communication | 2013 |
| Villa Paradis AS | Real estate | 2014 |
| Vimlo AS | Wholesale & retail | 2022 |
| Viridi Aqua AS | Agriculture & fishing | 2018 |
| Viscum AS | Real estate | 2014 |
| Vissim AS | Information & communication | 1988 |
| Vissim Communications and Logistics AS | Information & communication | 2008 |
| Vita Veritas AS | Professional & scientific | 2018 |
| Volant Kapital AS | Real estate | 2018 |
| Vortex VVS AS | Construction | 2025 |
| Våt Tek AS | Professional & scientific | 2015 |
| W-N Holding AS | | 2020 |
| W.Obara Bygg AS | Construction | 2024 |
| Warhuus Graficonsult AS | Manufacturing | 1992 |
| Wegger Holding AS | | 2024 |
| Werth Elektro AS | Construction | 2012 |
| Wessel Invest AS | | 2026 |
| WF Marketing Da | Professional & scientific | 2025 |
| Whitfield International Inc. | Information & communication | 1996 |
| Wiik & Riis Capital AS | | 2026 |
| Willys Markiser AS | Construction | 2020 |
| Wiloli Holding AS | Wholesale & retail | 2023 |
| Wivestad & Skogsholm AS | Real estate | 2012 |
| Wivestad Hus Holding AS | Real estate | 2020 |
| Wold Kran Og Transport AS | Transport & logistics | 2022 |
| Wolltex Textilfabrikation Und Warenhandel GmbH | | 2004 |
| Yaku AS | Hospitality | 2022 |
| Yellow Brick Road AS | Wholesale & retail | 2023 |
| Yme Drift AS | Administrative & support | 2015 |
| Zeal Ans | Information & communication | 2000 |
| Zen Eiendom AS | Construction | 2023 |
| Zenitel Mediterranean D. O. O. - Branch Office Horten Nuf | Information & communication | 2024 |
| Zimmertech AS | Professional & scientific | 2008 |
| Ziot Solutions AS | Manufacturing | 2019 |
| Åscar Holding AS | Transport & logistics | 2023 |
| Åsgårdstrand Auksjonsforretning AS | Wholesale & retail | 2001 |
| Ørnhuset AS | Real estate | 2003 |
| Østlandet Totalmontasje AS | Construction | 2025 |
| Østlandske Brønn Og Energiboring AS | Construction | 2017 |
| Øvd Eiendom AS | Real estate | 2018 |
| Øvd Invest AS | Real estate | 2015 |
| Øyelege Elisabeth Ancher Lindberg AS | Health & social care | 2012 |