| Warriors HQ Ltd | Arts & recreation | 2025 |
| Warty Financial & Transfer Ltd | Financial services | 2015 |
| Warwick Development Holdings Limited | Financial services | 2025 |
| Warwick Development Limited | Manufacturing | 1999 |
| Warwick Development Specialist Window Division Limited | Construction | 2001 |
| Warwick Time-Share Limited | Real estate | 1982 |
| Warwickshire Brain and Spine Imaging Limited | Health & social care | 2010 |
| Warwickwill Ventures Ltd | Wholesale & retail | 2025 |
| WAS51B Ltd | Wholesale & retail | 2025 |
| Wasdon (Dover) Limited | Real estate | 1999 |
| Wasdon (Leeds) Limited | Real estate | 1998 |
| Waseem A2Z Ltd | Transport & logistics | 2026 |
| Washworx Limited | Administrative & support | 2025 |
| Wasif's Driving School Ltd | Education | 2026 |
| Wasp Security Ltd | Administrative & support | 2015 |
| Wasps Landscaping Ltd | Other services | 2022 |
| Wassail Ltd | Arts & recreation | 2025 |
| Wasteflow UK Limited | Water & waste | 2016 |
| Wasteland Power Generation Ltd | Energy | 2020 |
| Wastenot Management Limited | Manufacturing | 2013 |
| Wastewater Technical Services Ltd | Water & waste | 2013 |
| WAT Medical Services Ltd | Health & social care | 2023 |
| Watan Curry House Ltd | Hospitality | 2025 |
| Watch Security Limited | Construction | 2018 |
| Watchman Ecology Ltd | Professional & scientific | 2024 |
| Watcom Limited | Health & social care | 2015 |
| Water Damsel Limited | Transport & logistics | 1992 |
| Water Hall Investments Ltd. | Financial services | 2016 |
| Water Tower Public House Ltd | Hospitality | 2018 |
| Waterbridge Financial Planning Ltd | Financial services | 2015 |
| Waterford Glazing Limited | Manufacturing | 2015 |
| Waterhouse Geotehnical Limited | Professional & scientific | 2017 |
| Waterhouse Management Limited | Households | 2003 |
| Waterline BUS Company Limited | Professional & scientific | 1985 |
| Watermill Gardens (Penistone) Management Company Limited | Households | 2016 |
| Watermill-Ct Holdings Limited | Financial services | 2017 |
| Waterside Woodley Limited | Hospitality | 2025 |
| Waterwall Limited | Manufacturing | 2012 |
| Waterwheel Limited | Professional & scientific | 2021 |
| Watfords of Wombwell Limited | Construction | 1966 |
| Wath Construction Ltd | Construction | 2011 |
| Watkins Electrical Ltd | Extraterritorial | 2024 |
| Watkinsfba Ltd | Wholesale & retail | 2024 |
| Watson Cardiac Services Ltd | Health & social care | 2024 |
| Watson Lawrence Limited | Professional & scientific | 2021 |
| Watson Property Management South Yorkshire Limited | Real estate | 2023 |
| Watson Refractories Limited | Construction | 2020 |
| Watson Wild & Baker Limited | Health & social care | 2008 |
| Watve Ltd | Health & social care | 2022 |
| Wave Global Ecommerce Ltd | Wholesale & retail | 2025 |
| Wave Hand Surgery Ltd | Health & social care | 2022 |
| Wavebreak Limited | Professional & scientific | 2011 |
| Wavegull Trading Limited | Wholesale & retail | 2025 |
| Wavelength Counselling Ltd | Health & social care | 2025 |
| Wavelength NDT Limited | Professional & scientific | 2005 |
| Wavelength Yorkshire Ltd | Other services | 2024 |
| Wavelets Limited | Real estate | 2023 |
| Wavelong Ltd | Administrative & support | 2017 |
| Wavemakers Live Ltd | Administrative & support | 2019 |
| Waverley Health & Safety Consultants Limited | Professional & scientific | 2019 |
| WAW Rigging Services UK Limited | Construction | 2014 |
| WAW Siphonics Ltd | Construction | 2023 |
| Wawel Taunton Ltd | Wholesale & retail | 2017 |
| Wawin (York) Ltd | Hospitality | 2021 |
| Wawin Bakery S10 Ltd | Hospitality | 2021 |
| WAX ETC Ltd | Other services | 2026 |
| Waxhead Records Limited | Wholesale & retail | 2025 |
| Waxwing Assets Limited | Financial services | 2024 |
| Wayfarer Games Limited | Information & communication | 2018 |
| Wayland Investments Limited | Real estate | 2000 |
| Wayland One Limited | Information & communication | 2023 |
| Waymark Living Ltd | Hospitality | 2025 |
| Waymaster Games Ltd | Manufacturing | 2021 |
| Wayne's Garage Ltd | Wholesale & retail | 2018 |
| Waypoint Investments Limited | Extraterritorial | 1996 |
| Waz's Whipz 2.0 Limited | Hospitality | 2026 |
| Waz's Whipz Limited | Hospitality | 2024 |
| Wazzo Limited | Other services | 2020 |
| WB 2019 Limited | Real estate | 2019 |
| WB Coatings Limited | Construction | 2022 |
| WB Hutch Ltd | Information & communication | 2025 |
| WB Landscaping & Property Development Limited | Construction | 2026 |
| WBB Investments Ltd | Financial services | 2017 |
| WBS Lincolnshire Limited | Real estate | 2026 |
| WBS Trading Ltd | Hospitality | 2024 |
| WC Environmental Ltd | Water & waste | 2024 |
| Wccp Ltd | Health & social care | 2019 |
| WCG Environmental Limited | Water & waste | 2015 |
| WD at the White Swan Limited | Hospitality | 2024 |
| WDB Holdings Limited | Administrative & support | 2025 |
| Wdowt Ltd | Hospitality | 2025 |
| WDS Electrical Limited | Construction | 2012 |
| WE ARE Arise Ltd | Information & communication | 2014 |
| WE ARE Corner Store Ltd | Hospitality | 2025 |
| WE ARE Data Centers Limited | Information & communication | 2017 |
| WE ARE in Plant Limited | Construction | 1997 |
| WE ARE Makeup Ltd | Wholesale & retail | 2021 |
| WE ARE Neon Ltd. | Information & communication | 2015 |
| WE ARE Simple Limited | Professional & scientific | 2019 |
| WE ARE the Hide Ltd | Real estate | 2017 |