| Western Road Borough Green Properties Limited | Real estate | 2002 |
| Westfield Life Ltd | Administrative & support | 2021 |
| Westminster Residential Limited | Real estate | 2025 |
| Westoak Advisory Limited | Professional & scientific | 2026 |
| Westway Drainage Ltd | Other services | 2022 |
| Westwood Country Hotel Limited | Hospitality | 1997 |
| Wetton Cleaning Services Limited | Administrative & support | 1949 |
| Wetton Group Limited | Financial services | 2026 |
| Weunico Ltd | Professional & scientific | 2024 |
| Wexlyn Ltd | Construction | 2026 |
| WEY Images Ltd | Extraterritorial | 2015 |
| WGR Consulting Limited | Professional & scientific | 2020 |
| WGS Solar Limited | Administrative & support | 2014 |
| WH Siggs Ltd | Construction | 2022 |
| WHA Design Ltd | Professional & scientific | 2017 |
| WHA Ltd | Construction | 2016 |
| Wheatley Unity Land Limited | Extraterritorial | 2021 |
| Where YOU Bean Limited | Administrative & support | 2022 |
| Whipps Smart Repairs Ltd | Wholesale & retail | 2024 |
| Whistler Fitness Ltd | Arts & recreation | 2025 |
| White and Terry Limited | Professional & scientific | 2025 |
| White Beam Place Limited | Households | 2007 |
| White Label Films Ltd | Professional & scientific | 2018 |
| White Lodge (Sevenoaks) Limited | Hospitality | 2006 |
| White Lodge Close Residents Association Limited | Households | 1992 |
| White Rabbit Solutions Limited | Information & communication | 2012 |
| Whitegates Blinds & Co Ltd | Construction | 2024 |
| Whitepines Limited | Information & communication | 2012 |
| Whitington Brothers Ltd | Professional & scientific | 2010 |
| Whitmore Creative Consultancy Ltd | Administrative & support | 2023 |
| Whitney Consulting Limited | Professional & scientific | 2012 |
| Whittaker JS Limited | Construction | 2011 |
| Wickhurst Road Holdings Limited | Real estate | 2022 |
| Wickhurst Vineyard LLP | | 2022 |
| Widmore Homes Limited | Real estate | 2023 |
| Wika Calibration Technology Limited | Manufacturing | 2017 |
| Wika Instruments Limited | Manufacturing | 1971 |
| Wild Bear Productions Ltd | Extraterritorial | 2021 |
| Wild Planet Products Ltd | Manufacturing | 2010 |
| Wild Thyme Health Store Ltd | Wholesale & retail | 2023 |
| Wildacre Maintenance Ltd | Construction | 2025 |
| Wildeen Limited | Professional & scientific | 2019 |
| Wildernesse Club Limited | Arts & recreation | 1954 |
| Wildernesse Mount Limited | Other services | 2010 |
| Wildlands Contracting Ltd | Professional & scientific | 2024 |
| Wildtech Ltd | Professional & scientific | 2024 |
| Wiley Creative Digital Marketing Ltd | Other services | 2023 |
| Wilkommen Limited | Arts & recreation | 2019 |
| Will Borrell Electrics Ltd | Construction | 2021 |
| Will Writer Ltd | Professional & scientific | 2008 |
| William Alexander (Shoreham) Limited | Agriculture & fishing | 1986 |
| William Burton Consulting Ltd | Professional & scientific | 2024 |
| William G. Murphy Ltd | Real estate | 2010 |
| Williams Group Maidstone Limited | Wholesale & retail | 2011 |
| Williamson Family Holdings Ltd | Real estate | 2020 |
| Willian Associates Limited | Professional & scientific | 2008 |
| Willow and Bean Ltd | Manufacturing | 2026 |
| Willow Bay Residents Association Limited | Households | 2001 |
| Willow Knight Limited | Administrative & support | 2026 |
| Willow Woodlands Limited | Real estate | 2013 |
| Willowside Holdings LLP | | 2022 |
| Wilmont Property Investments Ltd | Real estate | 2025 |
| Wilsher Brothers Limited | Extraterritorial | 1933 |
| Wilton Books Ltd | Wholesale & retail | 2024 |
| Wimborne and Price Ltd | Professional & scientific | 2024 |
| Winch Energy Holdings LP | | 2010 |
| Winchester Park Investments Limited | Real estate | 1960 |
| Windfleet Ltd | Transport & logistics | 2014 |
| Window Express (Bromley) Limited | Construction | 2001 |
| Window Express U.K. Ltd. | Construction | 2002 |
| Windowexpress Ltd | Construction | 2015 |
| Wines Medical LLP | | 2011 |
| Wingham Engineering Company Limited(The) | Construction | 1889 |
| Wink Property Group Ltd | Construction | 2025 |
| Winning Travel Solutions Limited | Professional & scientific | 2020 |
| Winrisk Consulting Limited | Extraterritorial | 2021 |
| Winrisk Limited | Information & communication | 2002 |
| Winsford Development 1 Ltd | Construction | 2020 |
| Winsford Development 2 Ltd | Real estate | 2022 |
| Winsford Development 3 Ltd | Construction | 2022 |
| Winsford Estates Ltd | Administrative & support | 2021 |
| Winsford Property Developments Ltd | Construction | 2020 |
| Winthorpe Management Services Ltd | Construction | 2021 |
| Wippai Limited | Wholesale & retail | 2024 |
| Wisdom Castle UK Ltd | Wholesale & retail | 2021 |
| Wise Choice Glazing Limited | Construction | 2016 |
| Wisson Clements Limited | Professional & scientific | 2026 |
| With Knowledge Consulting Limited | Professional & scientific | 2023 |
| With Roam Nominees Limited | Other services | 2021 |
| Withinr Holdings Limited | Financial services | 2020 |
| Wizzard of Cakes & Bakes Limited | Extraterritorial | 2013 |
| WM Accountants Limited | Professional & scientific | 2013 |
| Wolf Catering Ltd | Hospitality | 2019 |
| Wolfpack Tours Ltd | Administrative & support | 2019 |
| Wolfsharn Ltd | Other services | 2015 |
| Wondersphere Ltd | Professional & scientific | 2011 |
| Wood Bros. (Properties) Limited | Real estate | 1959 |
| Wood Lodge Grange and Ferndale Limited | Households | 1984 |
| Wood View (Tatsfield) Residents Management Company Limited | Households | 2010 |
| Woodbridge Road Ltd | Real estate | 2021 |