| WE Sell Anywhere Ltd | Wholesale & retail | 2024 |
| WE Sell Games Ltd | Other services | 2024 |
| WE Supply for Less Ltd | Wholesale & retail | 2023 |
| WE Trust Property Services Ltd. | Construction | 2022 |
| Wealden Rehab (Holdings) Ltd | Administrative & support | 2015 |
| Wealden Rehab Ltd | Manufacturing | 2015 |
| Wealth Business Xchange Limited | Financial services | 2018 |
| Weareark Ltd | Information & communication | 2024 |
| Web Wonders Limited | Information & communication | 2022 |
| Webb One Limited | Hospitality | 1996 |
| Webslice Limited | Information & communication | 2022 |
| Wedding Assortment Ltd | Hospitality | 2023 |
| WEL Commercials Limited | Wholesale & retail | 2022 |
| Well Played JB Limited | Administrative & support | 2025 |
| Well-Being Platform Ltd | Health & social care | 2019 |
| Wellbeing Empowerment Club UK Ltd | Administrative & support | 2024 |
| Wellbeing Lovers Ltd | Transport & logistics | 2016 |
| Weller Logistics Ltd | Administrative & support | 2017 |
| Wellu UK Limited | Wholesale & retail | 2022 |
| West Circle Ltd | Information & communication | 2016 |
| West Malling Stores Limited | Wholesale & retail | 2004 |
| West One Technical Limited | Information & communication | 2007 |
| West View Accomodations Ltd | Real estate | 2021 |
| Westbury Signs Limited | Professional & scientific | 2008 |
| Wested Leather Co Ltd | Manufacturing | 2015 |
| Westerfield Services Limited | Manufacturing | 2026 |
| Western Logistics Limited | Transport & logistics | 2004 |
| Western Logistics Midlands Limited | Extraterritorial | 2020 |
| Western Package Ltd | Wholesale & retail | 2025 |
| Westland Investment Holdings Ltd | Financial services | 2021 |
| Westland Partners Ltd | Administrative & support | 2016 |
| Westwell Parks Limited | Real estate | 2017 |
| Westwood Carpentry & Design Limited | Construction | 2007 |
| Westwood Development Services Limited | Construction | 2001 |
| Westwood Structural Services Ltd. | Construction | 1987 |
| Wezz UK Ltd | Transport & logistics | 2011 |
| WFC One Limited | Arts & recreation | 2026 |
| Whbrown Legal Consultancy Ltd | Professional & scientific | 2017 |
| Wheatcroft&Co Limited | Professional & scientific | 2010 |
| Whgr JI Ltd | Wholesale & retail | 2025 |
| White Circle Logistics Ltd | Transport & logistics | 2026 |
| White Cross Care Ltd | Health & social care | 2014 |
| White Moon Holdings Limited | Wholesale & retail | 2019 |
| White Pigeons 91 Ltd | Transport & logistics | 2022 |
| White Raven EMI Ltd | Construction | 2020 |
| White Square Limited | Manufacturing | 2005 |
| Whitechapel Developments Limited | Real estate | 2025 |
| Whiterock Agro Allied Services Limited | Wholesale & retail | 2023 |
| Whitestone Inventories Ltd | Other services | 2019 |
| Whitley Ltd | Wholesale & retail | 2025 |
| Whitstable Windsurfing Limited | Wholesale & retail | 2004 |
| Whizzbang Ideas Ltd | Health & social care | 1997 |
| Wholistic Healthcare Ltd | Health & social care | 2022 |
| Wicked Creative (Copywriting) Ltd | Professional & scientific | 2021 |
| Wicked People Ltd | Professional & scientific | 2019 |
| WIDOW2WIDOW CIC | Other services | 2025 |
| Wild Pet Things Ltd | Wholesale & retail | 2024 |
| Wildes-Barelli Music Ltd | Education | 2024 |
| Wildmarine Studios Limited | Information & communication | 2026 |
| William Isaac Estates Limited | Real estate | 1964 |
| William Logan Investments Limited | Real estate | 2020 |
| Williams Mechanical Services Ltd | Construction | 2020 |
| Willow Trauma Recovery Counselling Service LLP | | 2026 |
| Wilpha Consultancy Limited | Education | 2019 |
| Wilson Kent Ltd | Real estate | 2022 |
| Wilson Security Services Limited | | 1988 |
| Wilson Tree Surgery Limited | Administrative & support | 2009 |
| Wilson's Express Same Day Limited | Transport & logistics | 1999 |
| Wincura Limited | Professional & scientific | 2007 |
| Windmill Scaffolding Ltd | Construction | 2026 |
| Windowfix Services Limited | Construction | 2023 |
| Windowsdan Ltd | Information & communication | 2017 |
| Windyridge Retail Ltd | Wholesale & retail | 2021 |
| Wing IT Consulting Ltd | Information & communication | 2025 |
| Wingrove Construction Management Ltd | Professional & scientific | 2018 |
| Wings Consultancy Ltd | Professional & scientific | 2021 |
| Winlify Ltd | Information & communication | 2026 |
| Winyoung Ltd | Wholesale & retail | 2024 |
| Wirehead Software Limited | Information & communication | 2026 |
| Wisdom Consult Limited | Professional & scientific | 2013 |
| Wisdom Universal Services Ltd | Information & communication | 2010 |
| Wise Building Developments Ltd | Construction | 2026 |
| Wiselaga Ltd | Health & social care | 2021 |
| Wiseman Nunn Ltd | Other services | 2004 |
| Wiseup Events Limited | Education | 2011 |
| Wiseup Team Building Limited | Education | 2015 |
| Wisevest Mgmt Ltd | Real estate | 2022 |
| With US Property Limited | Real estate | 2025 |
| WIZ Construction Ltd | Construction | 2023 |
| Wizard of OZ Limited | Wholesale & retail | 2022 |
| WJ Blythe Limited | Wholesale & retail | 2003 |
| WJH Flooring Ltd | Construction | 2022 |
| WK Consultant Ltd | Information & communication | 2014 |
| WLK Consulting Limited | Information & communication | 2008 |
| WLS Investment Partnership Limited | Financial services | 2017 |
| WLS Properties Group Limited | Real estate | 2024 |
| Wolfpack Consulting Limited | Professional & scientific | 2020 |
| Women of Influence Community C.I.C. | Health & social care | 2022 |
| Wonderful Days Limited | Administrative & support | 2022 |
| Woodford House Healthcare Limited | Health & social care | 2021 |