| Wellbeing Investments Bridging Limited | Construction | 2025 |
| Wellbeing Investments Limited | Real estate | 2016 |
| Wellcom Services Ltd | Professional & scientific | 2011 |
| Wembley Holiday Ltd | Transport & logistics | 2002 |
| Wembley Tour & Travel Limited | Transport & logistics | 2002 |
| Wembley Travel Ltd | Transport & logistics | 2002 |
| Wembley Travel.Co.Uk Ltd | Transport & logistics | 2002 |
| Wensleydale Longwool Ltd | Wholesale & retail | 2016 |
| Weski Limited | Administrative & support | 2017 |
| West END Property Management Limited | Real estate | 1999 |
| West Farm (Hawthorne) Limited | Extraterritorial | 2012 |
| West Layton Manor Limited | Hospitality | 2020 |
| West London Service Department Ltd | Information & communication | 2026 |
| WEST360 Construction Ltd | Construction | 2026 |
| Westbridge London Properties Limited | Real estate | 2015 |
| Westerley Construction Limited | Construction | 2017 |
| Western Oaks Ltd | Agriculture & fishing | 1996 |
| Westgarth Haulage Limited | Transport & logistics | 2008 |
| Westkey Legal Associates Ltd | Professional & scientific | 2023 |
| Westlands Advisory Ltd | Professional & scientific | 2018 |
| Westlink House Limited | Real estate | 2025 |
| Westlink Ltd | Other services | 2020 |
| Westmere Projects Limited | Construction | 2025 |
| Westminster Ltd | Extraterritorial | 2004 |
| Westwood Tool Rentals Ltd | Administrative & support | 2025 |
| Wethink Consultancy Ltd | Professional & scientific | 2023 |
| Wf-Racing Ltd | Manufacturing | 2021 |
| WHA Corporate Finance Limited | Professional & scientific | 2018 |
| WHA Tax Limited | Extraterritorial | 2015 |
| Whai Limited | Information & communication | 2025 |
| Wheatless Limited | Hospitality | 1997 |
| Whipd London Ltd | Wholesale & retail | 2026 |
| Whiskey & Wealth Capital Limited | Financial services | 2026 |
| Whiskey & Wealth Club Holdings Ltd | Wholesale & retail | 2022 |
| Whiskey & Wealth Club Limited | Wholesale & retail | 2018 |
| Whisper (SPV) Limited | Information & communication | 2023 |
| Whisper (SPV2) Limited | Information & communication | 2025 |
| Whisper (SPV3) Limited | Information & communication | 2025 |
| Whisper (SPV4) Limited | Information & communication | 2025 |
| Whisper (SPV5) Limited | Information & communication | 2026 |
| Whisper Films Limited | Information & communication | 2010 |
| Whitcliffe Grange Limited | Households | 2014 |
| Whitcome Group Limited | Professional & scientific | 2025 |
| White Hart Associates (London) Limited | Professional & scientific | 2002 |
| White Hart Associates Limited Liability Partnership | | 2005 |
| Wholistic Dermatology UK Ltd | Health & social care | 2018 |
| WHY NOT Respray Ltd | Other services | 2024 |
| WHY Scale Consulting Ltd | Professional & scientific | 2024 |
| Wide-Awake Engineering Limited | Information & communication | 2011 |
| Wigglesworth Hall Farm Limited | Real estate | 2025 |
| Wildberry Grocers Limited | Wholesale & retail | 2025 |
| Wilderness Travel Ltd | Administrative & support | 2021 |
| Will Brown DO the Mahi Ltd | Arts & recreation | 2025 |
| William Grant & Sons (AME) Limited | Professional & scientific | 2015 |
| William Grant & Sons Brand Management Partnership LP | | 2014 |
| William Grant & Sons Brands Limited | Wholesale & retail | 2014 |
| William Grant & Sons Commercial Limited | Manufacturing | 2021 |
| William Grant & Sons Distinction Limited | Manufacturing | 2016 |
| William Grant & Sons Holdings Limited | Financial services | 2023 |
| William Grant & Sons Ventures Limited | Financial services | 2024 |
| Willizard Interiors Limited | Construction | 2003 |
| Willowbank Holiday Park Limited | Hospitality | 1998 |
| Wilman Seafood Trading Limited | Extraterritorial | 2014 |
| Wilson-Petch Limited | Professional & scientific | 2004 |
| WIN Arena Limited | Information & communication | 2020 |
| Win-Door Joinery Limited | Manufacturing | 2017 |
| Windborough Homes ( Brampton Gardens ) Limited | Construction | 2018 |
| Windborough Homes ( Ingoldisthorpe) Limited | Construction | 2019 |
| Windborough Homes (Brampton Gardens Management) Limited | Real estate | 2020 |
| Windmill Hampton Hill Limited | Construction | 2022 |
| Windows Workshop Limited | Construction | 2019 |
| Wine and Whisky Merchants LLP | | 2024 |
| Wine at Heart Ltd | Wholesale & retail | 2020 |
| Winfield Search Limited | Administrative & support | 2013 |
| Winner ADS Ltd | Information & communication | 2026 |
| Winsland Limited | Professional & scientific | 2008 |
| Winterburn Cottage Rentals Limited | Real estate | 2026 |
| Winterburn Cottages Limited | Real estate | 2023 |
| Winttech Systems Ltd | Wholesale & retail | 2025 |
| Wise Agriculture Limited | Wholesale & retail | 2019 |
| Wise Developments Limited | Real estate | 2003 |
| Wise Women of Travel Limited | Administrative & support | 2014 |
| Wisley Limited | Wholesale & retail | 2003 |
| Wize Trade Limited | Wholesale & retail | 2018 |
| WJS Self Storage Ltd | Other services | 2024 |
| WM Investment Properties Limited | Real estate | 2019 |
| Wndr World Ltd | Manufacturing | 2026 |
| Woking Properties (Broadmead) Limited | Real estate | 2008 |
| Woking Properties Limited | Real estate | 2002 |
| Wokka Rouge Property Services Limited | Construction | 2020 |
| Wolf Investments Ltd | Real estate | 2022 |
| Wolfberg Growth Partners Ltd | Financial services | 2026 |
| Wolk Company Ltd | Hospitality | 2024 |
| Wollaton Capital Limited | Information & communication | 2015 |
| Women’S TRI Collective Ltd | Education | 2026 |
| Womora Ltd | Manufacturing | 2026 |
| Wonderhatch Ltd. | Professional & scientific | 2007 |
| Woodfinish Limited | Manufacturing | 2001 |
| Woodstock Assets Limited | Real estate | 2024 |
| Woodstock Capital LLP | | 2011 |