| Vvsdevelopments Ltd | Real estate | 2024 |
| W D Promotions Limited | Wholesale & retail | 2013 |
| W Talent Group Limited | Education | 2023 |
| W1 Music Limited | Professional & scientific | 2001 |
| W3 Property & Maintenance Limited | Real estate | 2023 |
| W8 Couriers Ltd | Transport & logistics | 2025 |
| Walnut 1970 Limited | Extraterritorial | 2014 |
| Walter Travel Ltd | Wholesale & retail | 2019 |
| Walters Electrical Installations Ltd | Construction | 2023 |
| Walton Motors Tdci Ltd | Administrative & support | 2025 |
| WAN Link Trading Co., Ltd | Wholesale & retail | 2024 |
| Wanings Investments Ltd | Real estate | 2019 |
| Warburton Court Management Limited | Households | 1992 |
| Ward Roofing & Building Services UK Limited | Construction | 2014 |
| Warecare Limited | Real estate | 2014 |
| Warlite FM Ltd | Administrative & support | 2023 |
| Warlock Marine Ltd | Financial services | 2020 |
| Warmahome Group Ltd | Construction | 2015 |
| Warwicker Stage & Screen Ltd | Information & communication | 2025 |
| Wash-Vac Services & Repairs Ltd | Manufacturing | 2009 |
| Waste NOT Want NOT Essex Limited | Water & waste | 2025 |
| Water END Developments Limited | Construction | 2020 |
| Water Lilly Estates Ltd | Real estate | 2025 |
| Watercraft Creative Ltd | Professional & scientific | 2022 |
| Watford Tattoo Company Limited | Arts & recreation | 2017 |
| Watheer Co Ltd | Professional & scientific | 2019 |
| Wauprints Ltd. | Manufacturing | 2020 |
| Waverley Bespoke Builders and Groundwork Ltd | Other services | 2023 |
| Waverley Garden Centre Limited | Administrative & support | 2024 |
| Waypoint X Ltd | Professional & scientific | 2018 |
| WB IT Services Limited | Information & communication | 2025 |
| WB Partitions & Ceilings Ltd | Construction | 2013 |
| Wberkton Limited | Transport & logistics | 2020 |
| Wchi Food Ltd | Hospitality | 2025 |
| WE Don'T Play Entertainment Ltd | Professional & scientific | 2025 |
| Wealdstone Football Club (2000) Limited | Arts & recreation | 2000 |
| Wealdstone Labour Hall Limited | Real estate | 1931 |
| Wealdstone Youth Football Club | Arts & recreation | 2025 |
| WEAR4WORK Limited | Wholesale & retail | 2019 |
| Web Marketing & Management Ltd | Hospitality | 2024 |
| Web Media Event Ltd | Information & communication | 2020 |
| Webmasters Solution Ltd | Professional & scientific | 2023 |
| Webrobot Ltd | Wholesale & retail | 2019 |
| WEI WU Wellness CIC | Education | 2026 |
| Welcome Europe Ltd | Hospitality | 2011 |
| Well Pleased Productions Ltd | Arts & recreation | 2022 |
| Wells Building Services Limited | Other services | 2007 |
| Wells Film Construction Limited | Information & communication | 2010 |
| Wellsonary Ltd | Wholesale & retail | 2020 |
| Welovecycles Ltd | Wholesale & retail | 2020 |
| Welwyn Medicines Limited | Professional & scientific | 2022 |
| Wemoval Ltd | Transport & logistics | 2024 |
| Wencheng Fastener Co., Limited | Manufacturing | 2019 |
| Wendy House (Residential) Ltd | Real estate | 2025 |
| Wengs Manufacturing Co., Ltd | Administrative & support | 2023 |
| Wenzhou Ailing Optics Co., Ltd | Administrative & support | 2021 |
| West 1 Music Ltd | Information & communication | 2000 |
| West Country Film Catering Ltd | Hospitality | 2013 |
| West END Food Centre Ltd | Wholesale & retail | 2021 |
| West END Surgery Ltd | Public administration | 2025 |
| West LDN Electrical Limited | Construction | 2017 |
| West London Chauffers Ltd | Households | 2025 |
| West London Cycling Ltd | Extraterritorial | 2021 |
| West London Housing Solutions Ltd | Real estate | 2016 |
| West London Logistics Limited | Transport & logistics | 2019 |
| West London Tiling & Developments Ltd | Construction | 2019 |
| West London Velo Ltd | Extraterritorial | 2025 |
| West Master Business Management College Ltd | Education | 2019 |
| West One Music Group France Limited | Information & communication | 2010 |
| West One Music Group Limited | Information & communication | 2016 |
| West One Music Limited | Information & communication | 2000 |
| Westdec Properties Ltd | Real estate | 2019 |
| Westgate Buy to LET Limited | Real estate | 2025 |
| Westholme Gardens Residential Management Company Limited | Households | 2010 |
| Westminster Decorators Ltd | Construction | 2005 |
| Westrive Mentoring Ltd | Education | 2020 |
| Westway London Ltd | Water & waste | 2017 |
| Westwood PM Services Limited | Real estate | 2023 |
| Whisperingword Limited | Information & communication | 2008 |
| White Horse Hotel Limited | Hospitality | 2002 |
| White Horse Taverns Limited | Manufacturing | 2025 |
| White Knights Home Improvements Ltd | Construction | 2013 |
| White Oak Real Estate Ltd | Real estate | 2019 |
| White Snow Enterprise Limited | Hospitality | 2022 |
| White Truffle Project Ltd | Professional & scientific | 2025 |
| Whitebrick Property Ltd | Real estate | 2026 |
| Whitewebbs Residential Park Limited | Hospitality | 2025 |
| Whitmore Apartments Limited | Households | 2024 |
| Whitmore Engineering Ltd | Wholesale & retail | 2023 |
| Whizz Property Limited | Real estate | 2023 |
| Whizz Sparks Limited | Construction | 2007 |
| Whizzo'Z Ltd | Hospitality | 2021 |
| Wholesale Price Ltd | Wholesale & retail | 2025 |
| Wild SD Building Ltd | Construction | 2024 |
| Wiler Investments Limited | Professional & scientific | 2014 |
| Will Tech Global Ltd | Information & communication | 2025 |
| William Jacob Cook Limited | Arts & recreation | 2002 |
| William James Construction Limited | Construction | 2009 |
| Williams Welfare Ltd | Health & social care | 2021 |
| Willow Lodge Nursing Home Ltd | Health & social care | 2016 |