| Video 4 Limited | Professional & scientific | 2006 |
| Villa Marina Limited | Hospitality | 1991 |
| Visio UK Limited | Professional & scientific | 2010 |
| Voxswap Limited | Information & communication | 2007 |
| W H Wallington (Haulage) Limited | Transport & logistics | 1995 |
| W V Hinton (1994) Limited | Agriculture & fishing | 1993 |
| W.C.Green & SON Limited | Agriculture & fishing | 1961 |
| W.L. Shareholding Company Limited | Professional & scientific | 1958 |
| W.R. Harvey & Co. (Antiques) Limited | Wholesale & retail | 1956 |
| Waleed Taxtile Limited | Wholesale & retail | 2025 |
| Walker Consulting Solutions Limited | Professional & scientific | 2026 |
| Wallingford Limited | Professional & scientific | 1994 |
| Wallingford Museum | Arts & recreation | 2005 |
| Wallingford Systems Limited | Professional & scientific | 1988 |
| Wallingford Water Limited | Professional & scientific | 1988 |
| Walworth Castle Hotel Limited | Extraterritorial | 2000 |
| Wansbeck Estates Limited | Real estate | 2006 |
| Ward Events Limited | Professional & scientific | 2023 |
| Wards Limited | Real estate | 1979 |
| WB Stays Ltd | Real estate | 2026 |
| Wealth Software Solutions Limited | Information & communication | 2017 |
| Weavers Barn Management Company Limited | Administrative & support | 2001 |
| Webcurl CRM Limited | Information & communication | 2021 |
| Webcurl Digital Ltd | Information & communication | 2015 |
| Webcurl Limited | Information & communication | 2008 |
| Wekeep Ltd | Professional & scientific | 2025 |
| Weslake Aerospace Limited | Extraterritorial | 2022 |
| Weslake Air Services Limited | Extraterritorial | 2022 |
| Weslake Marine Limited | Extraterritorial | 2011 |
| Westgate Managed Services Limited | Real estate | 1997 |
| Westview Advisory Limited | Professional & scientific | 2023 |
| Wheatley Associates Holdings Limited | Professional & scientific | 2009 |
| Wheatley Software Solutions Limited | Information & communication | 1997 |
| Where the Fruit IS Ltd | Education | 2017 |
| Whispering Fields Limited | Hospitality | 2020 |
| Whites Coaches Limited | Transport & logistics | 2007 |
| Whittington Court (Highgate) Limited | Households | 2012 |
| Wicked Chocolate Oxford Limited | Extraterritorial | 2015 |
| Wilde Toast Limited | Professional & scientific | 2024 |
| Wildly Successful Women Entrepreneurs Ltd | Information & communication | 2019 |
| Williams Grand Prix Engineering Limited | Professional & scientific | 1977 |
| Willow Falls Limited | Hospitality | 1994 |
| Willows London Limited | Arts & recreation | 2013 |
| Wise Steelwork Limited | Manufacturing | 2003 |
| Witney Book-Keepers Limited | Professional & scientific | 2002 |
| Witney Laundrette Limited | Other services | 2022 |
| Wixroyd Group Ltd | Wholesale & retail | 1951 |
| Wixroyd Holdings Limited | Professional & scientific | 2003 |
| Wizard Investments Limited | Real estate | 1982 |
| Wobbleworks (UK) Limited | Wholesale & retail | 2021 |
| Womersley Fruit and Herb Vinegars Ltd | Wholesale & retail | 2008 |
| Wonderlost Studios Limited | Information & communication | 2021 |
| Woodlands Farm Ltd | Agriculture & fishing | 2003 |
| Worcester College Enterprises Limited | Administrative & support | 1998 |
| Workplace Health Direct Limited | Health & social care | 2006 |
| Wyatt & Cooper Ltd | Wholesale & retail | 2018 |
| Wychwood Builders Limited | Wholesale & retail | 1986 |
| Wychwood Communications Ltd | Administrative & support | 2004 |
| Wychwood James Limited | Professional & scientific | 2004 |
| Wysdom Touring Park Limited | Hospitality | 1997 |
| XL DOT Limited | Information & communication | 1994 |
| Yellowmoney Ltd | Financial services | 2020 |
| Zaloga Design Limited | Professional & scientific | 1997 |
| Zest Digital (Holdings) Limited | Financial services | 2021 |
| Zooplus Services Limited | Administrative & support | 2007 |