| Wellesley Petroleum AS | Mining & quarrying | 2014 |
| Wellex AS | Professional & scientific | 2012 |
| Wellnova AS | Professional & scientific | 2026 |
| Wellpartner Holding AS | Mining & quarrying | 2014 |
| Welltec Technology Center Stavanger AS | Professional & scientific | 2016 |
| Wellwork Holding AS | Financial services | 2000 |
| Wellwork Innovation AS | Professional & scientific | 2009 |
| Wenber Invest AS | Financial services | 2016 |
| Wenberg Engineering AS | Professional & scientific | 2025 |
| Wenn Property AS | Professional & scientific | 2023 |
| Wennture AS | | 2021 |
| Wepco AS | Manufacturing | 1986 |
| Wergeland Eiendom AS | Real estate | 1997 |
| Werner Import AS | Wholesale & retail | 2024 |
| Wersland AS | Information & communication | 2022 |
| Wertvoll AS | | 2020 |
| Wessels AS | Real estate | 2018 |
| WESSELS1 AS | Real estate | 2018 |
| WESSELS2 AS | Real estate | 2018 |
| West Coast Apartments AS | Hospitality | 2024 |
| West Communication AS | Wholesale & retail | 2006 |
| West Elektroverksted AS | Wholesale & retail | 1986 |
| West Geo AS | Real estate | 2005 |
| West Gratitude AS | Financial services | 2005 |
| Westbo AS | Real estate | 2006 |
| Westbo Holding AS | Real estate | 2006 |
| Westcape AS | | 2025 |
| Westco AS | Water & waste | 2018 |
| Westco Eiendom AS | Real estate | 2018 |
| Westco Eiendom Holding AS | Real estate | 2018 |
| Westco Holding AS | Real estate | 2018 |
| Westco Investering AS | Water & waste | 2016 |
| Westco Miljø AS | Water & waste | 1988 |
| Westco Property AS | Real estate | 2016 |
| Westcoast Rig & Sail AS | Manufacturing | 2022 |
| Westgass Energy AG Nuf | Professional & scientific | 2026 |
| Westgass Group AS | Professional & scientific | 2019 |
| Westgass Hydrogen AS | Manufacturing | 2021 |
| Westgass Internasjonal AS | Professional & scientific | 2022 |
| Westhawk AS | Professional & scientific | 2012 |
| Westknight AS | Arts & recreation | 2020 |
| Westmoor Holding AS | | 2016 |
| Westvik Holding AS | | 2014 |
| Westworld AS | Health & social care | 2023 |
| Wet and Wild Scuba Center Ans | Wholesale & retail | 1993 |
| Wewentlive AS | Administrative & support | 2022 |
| Whetstone AS | Financial services | 2016 |
| White Haven | | 2007 |
| Whiterock AS | | 2017 |
| Whiterock Capital AS | | 2021 |
| Why AS | Education | 2013 |
| Wi Ohana AS | Financial services | 2005 |
| Wica AS | Health & social care | 2005 |
| Wice Invest AS | | 2017 |
| Wifispesialisten AS | Information & communication | 2020 |
| Wigestrand Forlag AS | Information & communication | 1993 |
| Wigestrand Holding AS | Information & communication | 2005 |
| Wiig Eiendom AS | Real estate | 1997 |
| Wikaz Eiendom AS | Real estate | 2021 |
| Wilberg F&B AS | Hospitality | 2024 |
| Wilcla Invest AS | | 2022 |
| Wilcom Foods AS | Wholesale & retail | 2018 |
| Wildenveystien Consulting AS | Professional & scientific | 2012 |
| Wilhelmsen Arkitektur Nuf | Professional & scientific | 2010 |
| Will.I.Juice Stavanger AS | Hospitality | 2024 |
| Willard Medical AS | Education | 2023 |
| Williamson Holdings AS | Real estate | 2017 |
| Wimborne Learning AS | Education | 2026 |
| Windhammer AS | Real estate | 2005 |
| Windoornet AS | Wholesale & retail | 1997 |
| Wine-Oh AS | Wholesale & retail | 2015 |
| Winefinder AS | Real estate | 2006 |
| Winfried Etzel AS | Education | 2024 |
| Wing+Keel AS | Professional & scientific | 2025 |
| Wingding AS | Professional & scientific | 2023 |
| Wingly Invest AS | | 2020 |
| Wins Holding AS | | 2025 |
| Wintoura Invest AS | | 2022 |
| Wire Group AS | Manufacturing | 2011 |
| Wire Tech AS | Manufacturing | 2011 |
| Witro AS | Real estate | 1998 |
| WK Invest AS | Professional & scientific | 2015 |
| Wohaa Invest AS | Real estate | 2013 |
| Woldmo Invest AS | Real estate | 2014 |
| Wolum Eiendomsdrift AS | Real estate | 2021 |
| Wonderlab AS | Professional & scientific | 2024 |
| WORK2LEARN AS | Professional & scientific | 1991 |
| Workshop Service AS | Manufacturing | 1997 |
| Worsegaarden AS | Real estate | 1997 |
| Worsø Kommunikasjon AS | Professional & scientific | 2024 |
| Wpe Holding AS | | 2025 |
| Wragh Da | Arts & recreation | 2025 |
| WRC Alternative Investments 2 AS | | 2026 |
| WRC Alternative Investments AS | | 2024 |
| WRC Bidco 2 AS | | 2026 |
| WRC Bidco AS | | 2026 |
| WS Foto AS | Wholesale & retail | 2015 |
| WSW Invest AS | Financial services | 2018 |
| WTH Invest AS | Health & social care | 2024 |
| WV Invest AS | Construction | 2022 |