| Watson Design Limited | Professional & scientific | 2014 |
| Watson Video Limited | Manufacturing | 2022 |
| Waugh Search Ltd | Administrative & support | 2026 |
| Wave Group Holdings Ltd | Financial services | 2026 |
| Waveelement Ltd | Wholesale & retail | 2025 |
| Way of the Pigeon Ltd | Information & communication | 2025 |
| WB Websites Ltd | Information & communication | 2019 |
| Wbfh Property Limited | Households | 2025 |
| WDX Weddings Ltd | Administrative & support | 2025 |
| WE ARE Ground Control Ltd | Information & communication | 2024 |
| WE ARE the Good Kind Ltd | Professional & scientific | 2021 |
| WE DO Global Ltd | Wholesale & retail | 2022 |
| WE DO Greetings Ltd | Construction | 2023 |
| WE DO Parties Ltd | Construction | 2023 |
| WE Play Sports CIC | Arts & recreation | 2023 |
| Weald Contemporary LLP | | 2023 |
| Wear OR Carry Ltd | Manufacturing | 2025 |
| Weareitsm Ltd | Information & communication | 2026 |
| Wearthit Studio Limited | Other services | 2026 |
| Web Coding Solutions Ltd | Information & communication | 2022 |
| Web Crafters BD Ltd | Professional & scientific | 2025 |
| Webdicate Limited | Information & communication | 2020 |
| Webee Technologies Ltd | Wholesale & retail | 2026 |
| Webion Solutions Ltd | Wholesale & retail | 2025 |
| Webitech Ltd | Wholesale & retail | 2020 |
| Weblake & Co Ltd | Wholesale & retail | 2025 |
| Webmadness Limited | Information & communication | 2021 |
| Websat Ltd | Information & communication | 2020 |
| Webtoolu Ltd | Information & communication | 2025 |
| Webumo Ltd | Information & communication | 2024 |
| Webways Limited | Information & communication | 2002 |
| Webwise Edge Ltd | Professional & scientific | 2020 |
| Weekes Properties Ltd | Real estate | 2026 |
| Weeklyoffers Ltd | Wholesale & retail | 2020 |
| Wehouse Limited | Hospitality | 2025 |
| WEI Pathways CIC | Administrative & support | 2026 |
| Weighton Coin Wonders Limited | Wholesale & retail | 2003 |
| Weilauger Ltd | Wholesale & retail | 2026 |
| Welixa Limited | Wholesale & retail | 2026 |
| Well Humans Thrive Ltd | Professional & scientific | 2025 |
| Wellbeing Specialists Ltd | Education | 2024 |
| Wellbeing Through Wealth CIC | Professional & scientific | 2025 |
| Welliang Limited | Wholesale & retail | 2025 |
| Wellpath Digital Limited | Wholesale & retail | 2025 |
| Wells & Family Property Ltd | Real estate | 2023 |
| Wellzy Ltd | Wholesale & retail | 2026 |
| Wemarketiq Ltd | Professional & scientific | 2025 |
| Wendel Noordzij Limited | Health & social care | 2020 |
| Wesource Housing Ltd | Real estate | 2023 |
| West and North London Private GP Ltd | Health & social care | 2024 |
| West Hook Ltd | Hospitality | 2020 |
| West Midlands School Support Ltd | Education | 2026 |
| West Room Research Ltd | Professional & scientific | 2021 |
| West Surveying Ltd | Administrative & support | 2022 |
| West Trading and Collectibles Ltd | Wholesale & retail | 2025 |
| West Travel Ltd | Wholesale & retail | 2026 |
| Western Venture Developments Ltd | Real estate | 2011 |
| Westfield Clark Ltd | Extraterritorial | 2025 |
| Westfield Clarke Ltd | Extraterritorial | 2025 |
| Westfield Serric Ltd | Information & communication | 2002 |
| Westford Living Ltd | Wholesale & retail | 2026 |
| Westline Country Ltd | Hospitality | 2022 |
| Westmobility Group Ltd | Wholesale & retail | 2025 |
| Westville Assets Ltd | Real estate | 2019 |
| Westwynd Ltd | Wholesale & retail | 2025 |
| Westyan Property Investments Limited | Real estate | 2025 |
| Wexler Group Ltd | Extraterritorial | 2025 |
| Weyd Industries Limited | Information & communication | 2026 |
| WF Holding Group Ltd | Financial services | 2024 |
| Wfad Holdings Ltd | Wholesale & retail | 2015 |
| WGK Services Ltd | Administrative & support | 2024 |
| What DO Games Ltd | Information & communication | 2024 |
| What Keziah Cooks Ltd | Hospitality | 2026 |
| Wheeler Wholesale Limited | Wholesale & retail | 2026 |
| Whimoment Limited | Wholesale & retail | 2025 |
| Whis Building Systems Ltd | Construction | 2023 |
| Whiscult Limited | Wholesale & retail | 2025 |
| Whiskershark Limited | Wholesale & retail | 2023 |
| Whistle HR Solutions Limited | Administrative & support | 2025 |
| White Blossom Ltd | Other services | 2025 |
| White Gloves Concierge Ltd | Real estate | 2024 |
| White Hare Games Ltd | Information & communication | 2020 |
| White Rose Cakery Ltd | Hospitality | 2025 |
| White Wolf Technology Ltd | Information & communication | 2016 |
| Whitecurrant Ltd | Wholesale & retail | 2026 |
| Whitesquare CGI Ltd | Professional & scientific | 2025 |
| Whiting Consulting Services Ltd | Professional & scientific | 2025 |
| Wholenova Limited | Wholesale & retail | 2026 |
| Wholesale Direct Limited | Administrative & support | 2025 |
| Whollift Limited | Wholesale & retail | 2026 |
| WHY Design Creative Solutions Limited | Administrative & support | 2009 |
| Wicked Binary Ltd | Information & communication | 2012 |
| Wicket Cricket Ltd | Information & communication | 2022 |
| Widescreen.Ai Limited | Information & communication | 2025 |
| Wiggin Electrical Ltd | Construction | 2023 |
| Wight Motek Ltd | Wholesale & retail | 2025 |
| Wild Gardeners Nature Recovery Ltd | Wholesale & retail | 2022 |
| Wild Lens Nature Tours Ltd | Professional & scientific | 2024 |
| Wild Sprout Kitchen Limited | Manufacturing | 2025 |
| Wildebros Limited | Professional & scientific | 2016 |