| W E Cycle/Weld Limited | Construction | 2017 |
| W Emery & Sons Limited | Other services | 2006 |
| W Installations Limited | Administrative & support | 2013 |
| W Riaz Healthcare Services Ltd | Health & social care | 2025 |
| W.M. Codd Limited | Construction | 1974 |
| W.W. Greener (Sporting Guns) Limited | Manufacturing | 1985 |
| W.W. Greener Limited | Manufacturing | 1985 |
| W11 Consultancy Limited | Professional & scientific | 2025 |
| W2 Construction (Staffs) Ltd | Construction | 2025 |
| Wacker Neuson Limited | Wholesale & retail | 1962 |
| Waesch and Sutton (GAS & Heating Contractors) Ltd | Construction | 2006 |
| Waft Ltd | Agriculture & fishing | 2018 |
| Waggybytes Technology Ltd | Information & communication | 2023 |
| Waggy’S Walks Ltd | Other services | 2020 |
| Wags on Walks Limited | Other services | 2012 |
| Waihhuaa Limited | Wholesale & retail | 2025 |
| Wainwright Carpentry Contracts Limited | Construction | 2013 |
| Walker Commissioning Services Ltd | Construction | 2019 |
| Wallett Health, Safety and Environmental Services Limited | Professional & scientific | 2011 |
| Walo UK Limited | Construction | 1999 |
| Walter Dean Properties Ltd | Construction | 2024 |
| Waltham Investments Limited | Financial services | 2017 |
| Walton Multi-Academy Trust | Education | 2016 |
| WAM Agency Ltd | Professional & scientific | 2024 |
| WAN Food Supply Chain Co., Limited | Wholesale & retail | 2024 |
| Wanflex Rubber Co., Ltd | Extraterritorial | 2015 |
| Wang Charlie Digital Limited | Information & communication | 2021 |
| Wangzzzenb Ltd | Wholesale & retail | 2025 |
| Wanshun Group Co., Ltd | Wholesale & retail | 2022 |
| WANT2ACHIEVE C.I.C. | Education | 2018 |
| WANT2ACHIEVE Sport and Education Limited | Education | 2022 |
| WANT2ACHIEVE the Academy Limited | Education | 2021 |
| WAR Games Limited | Manufacturing | 2024 |
| Ward Tree Services Ltd | Administrative & support | 2021 |
| Wardray Services Limited | Construction | 2010 |
| Warevio Technology Group Limited | Information & communication | 2020 |
| Waring Green Ltd | Real estate | 2022 |
| Warren Richardson Limited | Construction | 2006 |
| Warstone Construction Limited | Construction | 2026 |
| Warstone Property Investments Limited | Real estate | 2026 |
| Washroom Services Limited | Administrative & support | 2008 |
| Wason Trading Limited | Wholesale & retail | 2025 |
| Waste Trade Holdings Limited | Wholesale & retail | 2021 |
| Waters Landscapes Limited | Administrative & support | 2025 |
| Watery Bank Barns Limited | Real estate | 2007 |
| WAX BE Gone Ltd | Health & social care | 2023 |
| WAX Jars UK Ltd | Wholesale & retail | 2023 |
| WB Directors Ltd | Professional & scientific | 1998 |
| Wcfs Limited | Professional & scientific | 2008 |
| WE ARE Buzzers Media Limited | Information & communication | 2016 |
| WE ARE BX2 Limited | Administrative & support | 2023 |
| WE ARE Candid Limited | Administrative & support | 2020 |
| Weatherproof Roofing & Property Maintenance Ltd | Construction | 2026 |
| Weathertight Roofing Limited | Construction | 1995 |
| Web Optic Limited | Information & communication | 2013 |
| Web-Routes Limited | Information & communication | 1996 |
| Webb Plant Group Ltd | Administrative & support | 2013 |
| Webforce Limited | Agriculture & fishing | 1997 |
| Webheath Meadow (Management) Limited | Construction | 2016 |
| Weir Group Europe Limited | Mining & quarrying | 2026 |
| Weis Industrial Co., Ltd | Extraterritorial | 2012 |
| WEK Contractors Ltd | Construction | 2025 |
| Welex Rental Limited | Construction | 2014 |
| Welex Verhuur B.V. | | 2009 |
| Well Creative Youth Project CIC | Education | 2025 |
| Well DO Source Co., Limited | Extraterritorial | 2013 |
| Well International Logistics Co., Ltd | Wholesale & retail | 2022 |
| Wellings Property Ltd | Real estate | 2020 |
| Wellington Prescott Limited | Arts & recreation | 2023 |
| Wellington Print Limited | Manufacturing | 2022 |
| Wellko Services Ltd | Wholesale & retail | 2025 |
| Welmar Developments (Stafford) Ltd | Construction | 2015 |
| Welovevending Ltd | Wholesale & retail | 2023 |
| Welwin Group Limited | Manufacturing | 2025 |
| WEN SHI Co. , Ltd | Manufacturing | 2024 |
| Wenji LUO Trading Limited | Wholesale & retail | 2026 |
| Wenjie Media Co., Ltd | Wholesale & retail | 2025 |
| Wenzhou Bestop Steel Co., Ltd | Manufacturing | 2023 |
| Wenzhou Hongdan Industry Co., Ltd. | Wholesale & retail | 2019 |
| Weprof Trading Co., Limited | Wholesale & retail | 2025 |
| West Midland Properties Limited | Real estate | 1980 |
| West Midland Property & Plant Limited | Administrative & support | 2009 |
| West Midlands Digital Ltd | Information & communication | 2017 |
| West Midlands GAS Connections Ltd | Construction | 2021 |
| Westcon Control Limited | Extraterritorial | 2018 |
| Westgate Global Ltd | Construction | 2012 |
| Westhaven Vale Ltd | Wholesale & retail | 2023 |
| Weston Estates (Staffs) Ltd | Real estate | 2002 |
| Weston Property Holdings Limited | Real estate | 2005 |
| Weston Road Catering Ltd | Hospitality | 2020 |
| Westside (Stafford) Limited | Transport & logistics | 1999 |
| Westwood Franklin Ltd | Manufacturing | 2023 |
| Wesun Health UK Limited | Wholesale & retail | 2023 |
| Whale Venture Trading Co., Limited | Wholesale & retail | 2025 |
| Whalesp Ltd | Wholesale & retail | 2025 |
| Whalewish Techs Limited | Wholesale & retail | 2025 |
| Wheaton Aston Dairy Limited | Wholesale & retail | 2003 |
| Wheel Art New Energy Technology (UK) Limited | Manufacturing | 2025 |
| Which Rate Limited | Professional & scientific | 2008 |
| Which Rate Online Ltd | Information & communication | 2017 |