| Waterview Business Park Management Company SE Ltd | Other services | 2018 |
| Waterview Property Management Ltd | Other services | 2015 |
| Watling Holdings Limited | Financial services | 2020 |
| Watling Tyre Service Limited(The) | Wholesale & retail | 1965 |
| Watmough Brothers Investments Limited | Real estate | 1975 |
| Watts Drive Ltd | Real estate | 2025 |
| Watz Industries Ltd | Construction | 2025 |
| Wave Digital Arts Ltd | Professional & scientific | 2015 |
| WAW Trans Ltd | Transport & logistics | 2020 |
| Wbak Limited | Construction | 2022 |
| WD Comms Ltd | Information & communication | 2018 |
| WDK Facades Ltd | Construction | 2024 |
| WE Like Property Ltd | Real estate | 2023 |
| WE Manage Business Ltd | Other services | 2020 |
| WE Thrive Consulting Ltd | Professional & scientific | 2025 |
| WE Thrive Workshops CIC | Health & social care | 2026 |
| Weald Court (Charing) Limited | Households | 1987 |
| Weaver Property Ltd | Real estate | 2020 |
| Weber Media Solutions Limited | Other services | 2018 |
| Weekes Consulting Ltd | Professional & scientific | 2026 |
| Wehost Serviced Accommodation Ltd | Real estate | 2019 |
| Well Wishing Transport Limited | Transport & logistics | 2026 |
| Wellerman Dairy Ltd | Wholesale & retail | 2025 |
| Wellfrio Ltd | Transport & logistics | 2022 |
| Wellington Brewery Limited | Hospitality | 2018 |
| Wellness Adventures Ltd | Administrative & support | 2026 |
| Wellness by DEO Ltd | Other services | 2024 |
| Wellness Parlour Limited | Manufacturing | 2012 |
| Wells Fish, Grill & Kebab Limited | Hospitality | 2023 |
| Wells of Hope Care Services Limited | Health & social care | 2023 |
| Wells Road Management Limited | Households | 1974 |
| Welly and Bear Limited | Arts & recreation | 2025 |
| Wentways Ltd | Administrative & support | 2026 |
| WER Compliance Group Ltd | Construction | 2020 |
| WES Building Limited | Construction | 2019 |
| Wescale Digital Ltd | Professional & scientific | 2024 |
| Wesley House Brompton Limited | Households | 2022 |
| West African Deal Limited | Wholesale & retail | 2015 |
| West Developments UK Ltd | Real estate | 2006 |
| West Facilities Services Ltd | Construction | 2024 |
| West Hill Electrical Services Ltd | Professional & scientific | 2021 |
| West Maintenance Services Limited | Construction | 2004 |
| Westbourne Finance Ltd | Professional & scientific | 2002 |
| Westech Car Body Repair & Spray Ltd | Wholesale & retail | 2021 |
| Westech Civil Engineering Limited | Construction | 2016 |
| Westech Construction Limited | Construction | 2013 |
| Westech Fire Protection Ltd | Construction | 2022 |
| Westech Group Limited | Construction | 2016 |
| Westech Holdings Ltd | Real estate | 2025 |
| Westminster Plumbers Ltd | Construction | 2023 |
| Weston Global Ltd | Wholesale & retail | 2019 |
| Westside Recruitment Ltd | Administrative & support | 2026 |
| WG City Property Ltd | Real estate | 2020 |
| Wgyb Support CIC | Health & social care | 2022 |
| Wheelie Clean South Eastern Ltd | Other services | 2022 |
| Whimsical Wishes Ltd | Wholesale & retail | 2024 |
| Whisper Audio Limited | Information & communication | 2010 |
| White Hart Depot Ltd | Real estate | 2023 |
| White Horse Equestrian Centre Limited | Arts & recreation | 2010 |
| White Oak Management Co. Limited | Real estate | 1989 |
| White Road Fish Ltd | Hospitality | 2025 |
| White Wheel Creative Limited | Information & communication | 2007 |
| Whitecode Acquisitions Limited | Financial services | 2025 |
| Whitecode Consulting Limited | Administrative & support | 1994 |
| Whitecode Design Associates Limited | Administrative & support | 2020 |
| Whitecode Holdings Limited | Financial services | 2020 |
| Whitecode Limited | Professional & scientific | 2022 |
| Whitehall Randall & Associates Limited | Financial services | 2003 |
| Whitehall Square Developments Limited | Construction | 2017 |
| Whitehill Developments Limited | Real estate | 2025 |
| Whitepost Windscreens Ltd | Wholesale & retail | 2020 |
| Whitesnow Limited | Households | 1987 |
| Whiteville Property Developments Ltd | Real estate | 2003 |
| Whittaker House Management Company Limited | Households | 2025 |
| Wholehog.Org Spit Roast & Cask ALE Co Ltd | Hospitality | 2013 |
| Wholesome & Delicious Food Ltd | Manufacturing | 2024 |
| Whyte Properties Limited | Construction | 2019 |
| Wicked Wings Ltd | Hospitality | 2018 |
| Wicked Works Limited | Wholesale & retail | 2012 |
| Wickenden and Grants Ltd | Hospitality | 2012 |
| Wilah Recruit Ltd | Administrative & support | 2022 |
| Wild Heart Tattoo Ltd | Other services | 2026 |
| Wild Muse London Ltd | Manufacturing | 2026 |
| Wild Reveries OIL Ltd | Wholesale & retail | 2026 |
| Wileycub Limited | Wholesale & retail | 2017 |
| Wilkin Reporting Ltd | Other services | 2022 |
| Wilkone Properties Ltd | Real estate | 2019 |
| William Bishop Engineering Limited | Professional & scientific | 1987 |
| William Charles Group Limited | Real estate | 2025 |
| William Charles Property Services Limited | Real estate | 2025 |
| William James Developments Limited | Construction | 2006 |
| William James Homes Limited | Professional & scientific | 2006 |
| William Thomas Kitchens Ltd | Construction | 2008 |
| Willow & Wand Ltd | Manufacturing | 2021 |
| Willow Independent Funeral Services Limited | Other services | 1999 |
| Willow Red Media Ltd | Information & communication | 2023 |
| Willowcroft Care Home Limited | Health & social care | 2009 |
| Willsrp Ltd | Real estate | 2024 |
| Wilsons (Medway) Limited | Real estate | 1980 |
| Windcrest International Limited | Real estate | 2015 |