| Web Traffic Boost Limited | Information & communication | 2013 |
| Web With James Limited | Information & communication | 2025 |
| Webb Estate Limited | Households | 1999 |
| Webb Group (Surrey) Ltd | Construction | 2022 |
| Webb Heating Limited | Construction | 2019 |
| Webbs Estate Agents (Croydon) Ltd | Real estate | 2016 |
| Webcredible Solutions Limited | Information & communication | 2013 |
| Webhost Dragon Ltd | Information & communication | 2024 |
| Webintellect Ltd | Information & communication | 2018 |
| Weboo Online Limited | Information & communication | 2009 |
| Webshard Ltd | Wholesale & retail | 2024 |
| Websites Fast Ltd | Information & communication | 2022 |
| Webstore Supplies Ltd | Wholesale & retail | 2015 |
| Webtech Technologies Ltd | Professional & scientific | 2022 |
| Wecare Housing & Support Limited | Administrative & support | 2020 |
| Weclikk Ltd | Information & communication | 2019 |
| Wedow Road (Thaxted) Management Company Limited | Households | 2013 |
| WEI Properties Limited | Real estate | 2022 |
| Weighill Builders Limited | Construction | 1980 |
| Weight & SEE Limited | Households | 1996 |
| Weir Biotech Consulting Ltd | Professional & scientific | 2022 |
| Welch Audiometric Calibration Services Ltd | Professional & scientific | 2019 |
| Welcombes View Management Company Limited | Households | 2014 |
| Welcome Property Investments Limited | Construction | 2015 |
| Weldfit Ltd | Construction | 2024 |
| Welford Asset Consultancy Limited | Information & communication | 2014 |
| Welford Asset Management Limited | Administrative & support | 2017 |
| Well Life Clinic Limited | Health & social care | 2023 |
| Welland House (Peterborough) Management Company Limited | Households | 1999 |
| Wellbeing YOU CIC | Health & social care | 2013 |
| Wellesley AA Ltd | Wholesale & retail | 2025 |
| Wellesley Construction Services Limited | Professional & scientific | 2009 |
| Wellington a Limited | Financial services | 2011 |
| Wellington B Limited | Financial services | 2011 |
| Wellington Place Chiswick Limited | Households | 2005 |
| Wellmar Limited | Administrative & support | 1991 |
| Wells Coffee Limited | Extraterritorial | 2014 |
| Wells Park Place Management Company Limited | Households | 2017 |
| Welshback Management Company Limited | Households | 1989 |
| Welwyn Merx Hertfordshire Limited | Wholesale & retail | 2026 |
| Welwyn Merx Limited | Wholesale & retail | 2014 |
| Wendie 1205 Limited | Real estate | 2025 |
| Wendlebury Court Limited | Households | 1990 |
| Wendover CT Management Company Limited | Households | 2026 |
| Wenridge Limited | Real estate | 2010 |
| Wentworth Corporate Advice Limited | Professional & scientific | 2017 |
| Wentworth Hurstbourne Limited | Wholesale & retail | 2019 |
| Wentworth Lodge Management Company Limited | Households | 2002 |
| Weohworks Limited | Information & communication | 2010 |
| Werise Solutions Ltd | Financial services | 2019 |
| Werunsouth Ltd | Education | 2026 |
| Wesingusing Company Limited | Education | 2014 |
| Wessex-C.C. Ltd | Professional & scientific | 2010 |
| Wesson House Residents Association Limited | Hospitality | 1994 |
| West Croydon Dental Practice Ltd | Health & social care | 2011 |
| West Croydon Fish Ltd | Hospitality | 2026 |
| West Croydon Takeaway Ltd | Hospitality | 2023 |
| West Ealing News Agency Limited | Wholesale & retail | 2017 |
| West Harrow Garage Limited | Wholesale & retail | 2008 |
| West Hill Sanderstead Limited | Real estate | 2014 |
| West Manor RTM Company Limited | Households | 2012 |
| West Midlands Lettings Ltd | Real estate | 2008 |
| West Street Croydon Limited | Households | 2020 |
| West Wickham DRY Cleaning and Alteration Limited | Other services | 2026 |
| Westbourne Place Management Company Limited | Households | 2015 |
| Westbourne Property Management Limited | Households | 1981 |
| Westbridge Park (Auckley) Management Company Limited | Households | 2013 |
| Westbrook & Oakwell Ltd | Real estate | 2026 |
| Westchart Limited | Construction | 2016 |
| Westciti Limited | Hospitality | 2016 |
| Westcroft Paddocks Management Company Limited | Households | 2006 |
| Westdene (West Grove) Management Limited | Households | 2005 |
| Westerleigh Court (Yate) Management Company Limited | Households | 2013 |
| Westerleigh Mews (Yate) Management Company Limited | Households | 2013 |
| Western & British Art Ltd | Wholesale & retail | 2006 |
| Western Marketing Services Limited | Administrative & support | 2004 |
| Western Road Property Brighton Limited | Hospitality | 2019 |
| Westgate House Ebbsfleet Management Company Limited | Households | 2022 |
| Westhaus Management Limited | Households | 2015 |
| Westlepe Developments Limited | Real estate | 2022 |
| Westmede Residents Limited | Households | 2006 |
| Westminster Court (Guildford) Residents Association Limited | Households | 1983 |
| Westminster Court (Worthing) Management Limited | Households | 1963 |
| Westminster Grocery & General Store Limited | Wholesale & retail | 2009 |
| Westminster Infrastructure Solutions Limited | Professional & scientific | 2026 |
| Westminster Park (Warrington) Management Company Limited | Households | 2007 |
| Westminster Place Management Limited | Households | 2016 |
| Westminster Square Management Limited | Households | 1996 |
| Weston Lane Limited | Households | 2004 |
| Westow Resources Ltd | Real estate | 2018 |
| Westow Secretarial Limited | Professional & scientific | 2016 |
| Westow Street Properties Ltd | Real estate | 2006 |
| Westside Enterprises Ltd | Information & communication | 2015 |
| Westside House Freehold Ltd | Households | 2010 |
| Westside House Management Company Limited | Households | 1999 |
| Westwayz Property Services Limited | Transport & logistics | 2025 |
| Westwind Energy Group Limited | Financial services | 2025 |
| Weybridge News Limited | Wholesale & retail | 2010 |
| Weybush Development Limited | Real estate | 2018 |
| WG Desserts Limited | Hospitality | 2023 |