| Waseem Investments Limited | Real estate | 2024 |
| Wasel Limited | Transport & logistics | 2017 |
| Wasym Ltd | Wholesale & retail | 2026 |
| Waterloo Chinese Limited | Hospitality | 2016 |
| Waterloo Fish Limited | Hospitality | 2016 |
| Waterside Heating & Plumbing Limited | Construction | 2003 |
| Waterside Properties Holding Ltd | Financial services | 2025 |
| Waterside Property Group Limited | Real estate | 2022 |
| Watford Bar Services Ltd | Real estate | 2025 |
| Watford Club Services Ltd | Real estate | 2025 |
| Watford O Bar Ltd | Hospitality | 2025 |
| Wavestore Global Limited | Manufacturing | 2015 |
| Waybell Park (Residents) Association Limited | Households | 1988 |
| Wbbs Car Movers Ltd | Transport & logistics | 2025 |
| WE ARE Visual Limited | Administrative & support | 2015 |
| WE Buy UK Houses Limited | Real estate | 2003 |
| WE Care 24/7 Healthcare Ltd | Health & social care | 2014 |
| WE DO Care (London) Ltd | Health & social care | 2015 |
| WE DO Mobility Ltd | Wholesale & retail | 2021 |
| WE DO Numbers Limited | Professional & scientific | 2025 |
| WE R Media Ltd | Professional & scientific | 2020 |
| WE R Properties Ltd | Real estate | 2024 |
| WE Work Homes Limited | Real estate | 2025 |
| Wealdstone Ltd | Hospitality | 2018 |
| Wealth Properties Ltd | Real estate | 2019 |
| Webenious Limited | Information & communication | 2025 |
| Webgen Limited | Information & communication | 2026 |
| Webhike Ltd | Wholesale & retail | 2024 |
| Webmax Ltd | Professional & scientific | 2014 |
| Weelz Ltd | Other services | 2024 |
| Weiss Partners Limited | Other services | 2019 |
| Welcome Signs & Graphics Ltd | Arts & recreation | 2012 |
| Welding Consultancy Services Ltd | Professional & scientific | 2019 |
| Wellness Healthcare Supplies Ltd | Wholesale & retail | 2023 |
| Wellrios Construction Ltd | Construction | 2019 |
| Wellstone Management Ltd | Construction | 2014 |
| Wellworth Property Limited | Real estate | 2021 |
| Wemoval London Ltd | Transport & logistics | 2026 |
| Wenros Washery Ltd | Construction | 2026 |
| Wepaintwell Ltd | Construction | 2026 |
| Wescombe Corporation Limited | Administrative & support | 2004 |
| Wessex Real Estate (New Forest) Limited | Real estate | 2026 |
| Wessex Real Estate Limited | Professional & scientific | 2024 |
| West 3 Mechanical Contractors Limited | Construction | 1996 |
| West 3 Property Maintenance Limited | Construction | 2019 |
| West Drayton Cars Limited | Wholesale & retail | 2026 |
| West END Jazz Limited | Hospitality | 2024 |
| West Line Property Ltd | Real estate | 2025 |
| West London Auto Locksmith Limited | Wholesale & retail | 2026 |
| West London Chess Academy Ltd | Education | 2025 |
| West London Contractors Ltd | Construction | 2025 |
| West London Darts Ltd | Wholesale & retail | 2025 |
| West London Face Clinic Ltd | Health & social care | 2013 |
| West London Installations Ltd | Construction | 2024 |
| West London Joinery Ltd | Manufacturing | 2020 |
| West London R Specialist Motors Ltd | Wholesale & retail | 2024 |
| West London Therapy Rooms Limited | Real estate | 2020 |
| West London Track and Field Ltd | Education | 2026 |
| West Lounge Ltd | Hospitality | 2025 |
| West Ruislip (Block a) Management Limited | Real estate | 1982 |
| West Ruislip(Block D)Management Company Limited | Households | 1984 |
| Western Car Trade Ltd | Wholesale & retail | 2019 |
| Western Road Limited | Construction | 2004 |
| Western Solutions Limited | Wholesale & retail | 2009 |
| Westgate Court (Wycombe) Management Company Limited | Real estate | 1985 |
| Westgate Court (Wycombe) NO. 2 Management Company Limited | Real estate | 1986 |
| Westglaze Limited | Manufacturing | 2023 |
| Westmead Productions (Holdings) Limited | Financial services | 1966 |
| Westmead Productions Limited | Real estate | 1954 |
| Westminster International Group Ltd | Professional & scientific | 2017 |
| Westminster Tower Management Company Limited | Households | 2024 |
| Weston Healthcare Professionals Ltd | Administrative & support | 2022 |
| Westover Court Management (High Wycombe) Limited | Real estate | 1978 |
| WEX Power Limited | Construction | 2018 |
| Wfdb Limited | Construction | 2018 |
| WH Home Limited | Real estate | 2022 |
| WH Repairs and Installations Ltd | Other services | 2025 |
| WH Solutions Ltd | Information & communication | 2018 |
| Whale Property Ltd | Real estate | 2024 |
| Wheels and Wheels Limited | Wholesale & retail | 2025 |
| Whispering Pinetree Ltd | Professional & scientific | 2024 |
| Whistable Holiday Lettings Limited | Real estate | 2022 |
| White & White Cars Ltd | Wholesale & retail | 2017 |
| White Cliffs Lodge Limited | Health & social care | 2002 |
| White Supply Limited | Administrative & support | 2018 |
| White Swan Solutions Ltd | Professional & scientific | 2026 |
| Whitehall Road Residents Association Limited | Households | 1979 |
| Whitehall Road RTE Company Limited | Professional & scientific | 2008 |
| Whitehouse Family Limited | Administrative & support | 2006 |
| Whitestile 1 Limited | Real estate | 2017 |
| Whitsands Homes Ltd | Real estate | 2017 |
| Whyfy Limited | Information & communication | 2024 |
| Whyteglory Limited | Professional & scientific | 2025 |
| Wick & Ceramic Ltd | Arts & recreation | 2022 |
| Wicks Developments Ltd | Construction | 1988 |
| Wighthouse Properties Limited | Real estate | 2025 |
| Wiivon Ltd | Information & communication | 2020 |
| Wikaas Merchants Ltd | Other services | 2019 |
| Wildcat Gold PLC | Mining & quarrying | 2020 |
| Wildrose Estates Limited | Real estate | 2020 |