| Wade International (UK) Limited | Manufacturing | 1963 |
| Wade International Limited | Manufacturing | 2002 |
| Waendel Properties Limited | Real estate | 2026 |
| Wakefield and Dennis Limited | Administrative & support | 2026 |
| Wakely Hill Healthcare Limited | Health & social care | 2021 |
| Walanyo Companies Ltd | Wholesale & retail | 2026 |
| Waldemar Irek Limited | Transport & logistics | 2015 |
| Walk Inns Limited | Hospitality | 2009 |
| Walker Property Developments Ltd | Construction | 2021 |
| Walking Miles Limited | Arts & recreation | 2017 |
| Wallis Lettings Limited | Real estate | 2018 |
| Wallis Mill Interiors Limited | Wholesale & retail | 2012 |
| Wallis Mill Limited | Wholesale & retail | 2011 |
| Walls and Floors Limited | Wholesale & retail | 2003 |
| Walsh's Limited | Other services | 2002 |
| Wama Lounge Limited | Hospitality | 2024 |
| Wama Ltd | Construction | 2021 |
| Ward Aerospace Consulting Ltd | Professional & scientific | 2025 |
| Ward Property Group Ltd | Construction | 2017 |
| Wards Apartments Ltd | Real estate | 2026 |
| Warkton Holding Ltd | Financial services | 2025 |
| Warkton Letting Ltd | Real estate | 2025 |
| Warkton Properties Ltd | Real estate | 2025 |
| Warkton Roofing Co Limited | Construction | 1995 |
| Warkton Wealth Management Ltd | Financial services | 2021 |
| Warrow Ltd | Professional & scientific | 2015 |
| Warwick House Apartments Limited | Real estate | 2024 |
| Warwick Mount Limited | Real estate | 2024 |
| Warwick Towers Limited | Real estate | 2024 |
| Water Network Management Solutions Ltd | Professional & scientific | 2021 |
| Water Technical Services Ltd | Construction | 2019 |
| Watercress Consultants Ltd | Information & communication | 2026 |
| Waterfield (A&L) Limited | Construction | 2017 |
| Waterfield (Red Roofs) Ltd | Construction | 2019 |
| Waterfield Dudley (Hunstanton 1) Limited | Construction | 2018 |
| Waterfield Dudley Limited | Construction | 2015 |
| Waterline Services Ltd | Construction | 2023 |
| Waterloo Crescent Ltd | Real estate | 2019 |
| Waters and Cookman Holdings Ltd | Financial services | 2020 |
| Waterside 21 Limited | Construction | 2012 |
| Waterside Commercial Developments Limited | Real estate | 2015 |
| Watson Gardner Limited | Hospitality | 2025 |
| Watters Scaffolding Services Limited | Construction | 2005 |
| Wavecentric Ltd | Information & communication | 2025 |
| Waverley Manor Care Ltd | Administrative & support | 2025 |
| Waycase Limited | Wholesale & retail | 2024 |
| Waynewrites Limited | Information & communication | 2013 |
| WDC Partnership Limited | Real estate | 2015 |
| WE ARE Hierarchy Limited | Arts & recreation | 2017 |
| WE Enjoy Learning Limited | Education | 2018 |
| Wearezumi Limited | Professional & scientific | 2022 |
| Webb Associates Public Relations Limited | Professional & scientific | 2003 |
| Webb Ventures Ltd | Financial services | 2015 |
| Webster Engineering Limited | Manufacturing | 2007 |
| Websters Florists Limited | Wholesale & retail | 2017 |
| Wecares Mart Limited | Wholesale & retail | 2024 |
| Weee Environmental (GB) Limited | Water & waste | 2008 |
| Weetabix Limited | Manufacturing | 1932 |
| Weight Loss With Nicki Limited | Other services | 2012 |
| Weima UK Limited | Extraterritorial | 2001 |
| Weisertechnik Limited | Wholesale & retail | 2019 |
| Weiyan Limited | Hospitality | 2024 |
| Weldon Tree and Landscapes Limited | Agriculture & fishing | 2016 |
| Welfare Action CIC | Other services | 2025 |
| Welham Computer Services Limited | Information & communication | 2004 |
| Welham Manor Management Company Limited | Households | 2026 |
| Welin Aviation Limited | Transport & logistics | 2021 |
| Well Lane Management Limited | Households | 2001 |
| Welland Land and Planning Limited | Administrative & support | 2019 |
| Welland Valley Cars Ltd | Transport & logistics | 2023 |
| Wellingborough Bereavement Services Limited | Other services | 2015 |
| Wellingborough Professional Education Ltd | Education | 2023 |
| Wellingborough Self Store Ltd | Real estate | 2025 |
| Wellingborough Trains and Models Limited | Wholesale & retail | 2024 |
| Wellington Warehouse Direct Limited | Wholesale & retail | 2010 |
| Wellington Works Management Company Limited | Households | 2001 |
| Wellmet Companion Ltd | Health & social care | 2026 |
| Wellplay Limited | Administrative & support | 1993 |
| Wells Trading Co Ltd | Hospitality | 2022 |
| Wellskye Ltd | Real estate | 2024 |
| Wellsyke Ltd. | Professional & scientific | 2001 |
| Welltan Ltd | Other services | 2026 |
| Welltrust Healthstaff Limited | Administrative & support | 2022 |
| Wemtise Limited | Professional & scientific | 2006 |
| Wendy's Nails Ltd | Other services | 2016 |
| Wenglor Sensoric Limited | Administrative & support | 1995 |
| Wergs Limited | Extraterritorial | 1956 |
| Werma (U.K.) Limited | Wholesale & retail | 2007 |
| Werringtons Developments Limited | Construction | 2020 |
| Werringtons Ltd | Hospitality | 2008 |
| Wesley Offshore Limited | Other services | 2025 |
| Wesley Weddings Limited | Information & communication | 2025 |
| West Bridge Business & Planning Ltd | Real estate | 2026 |
| West Hill Consulting Ltd | Financial services | 2021 |
| West Lodge Plants and Gardens Limited | Wholesale & retail | 2003 |
| West Premier Properties Limited | Real estate | 2017 |
| Westgate Security Ltd | Administrative & support | 2026 |
| Westminster Acquisition Limited | Financial services | 2017 |
| Westminster U.K. Holdings Limited | Financial services | 2022 |
| Westward HO Property Ltd | Real estate | 2020 |