| Webwork Labs Ltd | Information & communication | 2025 |
| Wedge Property (Holdings) Ltd | Real estate | 2004 |
| Wedge Property (Residential) Limited | Real estate | 2004 |
| Welcome Inn (Surrey) Ltd | Hospitality | 2016 |
| Weld-Line Engineering Services Limited | Information & communication | 1978 |
| Welders Inc. Ltd | Manufacturing | 2005 |
| Wellness Smile Limited | Health & social care | 2025 |
| Wellrich Limited | Professional & scientific | 1989 |
| Wellroad Investments Limited | Real estate | 2007 |
| Wellsborough Developments Limited | Real estate | 1998 |
| Wellstone Properties Limited | Real estate | 1997 |
| Weng Ltd | Administrative & support | 2017 |
| Wesley Cooper Ltd | Professional & scientific | 2006 |
| Wessenden Marketing Limited | Administrative & support | 2007 |
| West 4 Construction Limited | Construction | 2006 |
| West END Commercial Ltd | Wholesale & retail | 2017 |
| West END Refurbishment Ltd | Construction | 2011 |
| West Horsley Dental Practice Limited | Health & social care | 2008 |
| West Horsley Motor Works Limited | Wholesale & retail | 1962 |
| West Street Sheerness Limited | Real estate | 2008 |
| West Surrey Golf Club Company, Limited | Arts & recreation | 1909 |
| Westbourne Care Limited | Health & social care | 2007 |
| Westcar Financial Planning Ltd | Financial services | 2013 |
| Westell Property Company Limited | Real estate | 1962 |
| Western Pathways Ltd | Health & social care | 2019 |
| Westland Products Limited | Professional & scientific | 1973 |
| Westmead (Effingham) Limited | Households | 2000 |
| Westminster Green Acquisitions Limited | Construction | 2006 |
| Westplan Investments Limited | Real estate | 2000 |
| Wexley Group Ltd | Wholesale & retail | 2025 |
| WEY Computing Solutions Limited | Information & communication | 2022 |
| WEY Valley Bowls Association Limited | Arts & recreation | 1970 |
| WEY Valley Properties Limited | Real estate | 2010 |
| Weyburn Camshafts Limited | | 1925 |
| Weycombe Road Management Company Limited | Real estate | 2004 |
| Weyside Management Services Limited | Professional & scientific | 1981 |
| WH Brickwork Contractors Limited | Construction | 1998 |
| Wheelbase Car Sales Limited | Wholesale & retail | 1995 |
| Wheelbase Garage Limited | Wholesale & retail | 1995 |
| Wheelchair Travel Limited | Administrative & support | 1987 |
| Wherry Financial Services Limited | Financial services | 1997 |
| WHI (Financial Services) Limited | Financial services | 1983 |
| Whitcombe Projects Limited | Professional & scientific | 1996 |
| White Barnes & Co. Limited | Construction | 1996 |
| White Designs Limited | Professional & scientific | 2005 |
| White Square (Southern) Ltd | Construction | 2003 |
| Whitefriar Limited | Professional & scientific | 2003 |
| Whitegates Care Centre Limited | Health & social care | 2018 |
| Whitehaven Aviation Consultancy Limited | Transport & logistics | 2018 |
| Whitehorse Stores Limited | Wholesale & retail | 2002 |
| Whitening Quick Limited | Health & social care | 2003 |
| Whiteoaks Estates Limited | Real estate | 2003 |
| Whites Builders (Shirley) Limited | | 1975 |
| Whitesteel Limited | Real estate | 1998 |
| Whitgift Hire Company Limited | Administrative & support | 1976 |
| WHO Owns Whom Limited | Information & communication | 2005 |
| Wholeserve (Recycling) Limited | Professional & scientific | 2002 |
| WHY NOT Group Limited | Professional & scientific | 2004 |
| Wickens Media Services Limited | Information & communication | 2004 |
| Wickham Business Services Limited | Professional & scientific | 2006 |
| Wildcat Marine Limited | Transport & logistics | 2008 |
| Wilkes & Sons Limited | Construction | 1999 |
| Wilky Group Limited(The) | Professional & scientific | 1971 |
| Willad Limited | | 1935 |
| William Hampton (Holdings) Limited | Financial services | 1911 |
| Willis Towers Watson Assessment Limited | Financial services | 2022 |
| Willklean Limited | Administrative & support | 2002 |
| Willmotts Healthcare Limited | Extraterritorial | 2002 |
| Willodean Ltd. | Hospitality | 2004 |
| Willow Lane Management Company Limited | Real estate | 1994 |
| Willowcombe Limited | Construction | 1975 |
| Willows Investments Limited | Administrative & support | 2007 |
| Wiltan Self Drive Rental Limited | Transport & logistics | 1991 |
| Wimbledon Commerce Ltd | Professional & scientific | 1999 |
| Wimbledon Tree Services Limited | Extraterritorial | 1995 |
| Winaim Limited | Information & communication | 2003 |
| Winchester Mews (Clarkes Avenue) Management Company Limited | Households | 2005 |
| Windlesham Golf Management Limited | Arts & recreation | 1992 |
| Windmill Tearooms Limited | Hospitality | 2006 |
| Windows Factory London Limited | Construction | 2020 |
| Windsor Holdings Limited | Arts & recreation | 1982 |
| Windsor Telecom Limited | Information & communication | 1999 |
| Windsor Telecommunications Limited | Professional & scientific | 1999 |
| Windways Residents Limited | Extraterritorial | 2007 |
| Wine Circle Limited | Hospitality | 2018 |
| Winners Retail Ltd | Wholesale & retail | 2019 |
| Winning Edge (UK) Limited | Professional & scientific | 2001 |
| Winston Laboratories Limited | Manufacturing | 2004 |
| Winston Windings Limited | Manufacturing | 1967 |
| Winterbay Limited | Information & communication | 1994 |
| Wisdom H R Consulting Limited | Professional & scientific | 2006 |
| Wise Labs Ltd | Information & communication | 2018 |
| Wiseacc Ltd | Professional & scientific | 2024 |
| Wiseacc Services Ltd | Professional & scientific | 2024 |
| Wisei Holdings Ltd | Real estate | 2021 |
| Wisphome Limited | Administrative & support | 1976 |
| Wistwell Ltd | Construction | 2006 |
| Witherns Consulting Ltd | Administrative & support | 2023 |
| Wizzlink Ltd | Information & communication | 2002 |
| WJR Consultancy Limited | Information & communication | 2005 |