| Vontier UK Holdings Limited | Financial services | 2021 |
| Vonula Limited | Administrative & support | 2025 |
| VR Solutions Private Limited | Health & social care | 2006 |
| Vrsp Optical Ltd | Health & social care | 2007 |
| VSA International Limited | Construction | 2025 |
| VSA Investments Limited | Real estate | 2007 |
| VSG Car Sales Ltd | Wholesale & retail | 2023 |
| VSM Services Ltd | Wholesale & retail | 2015 |
| Vtea Limited | Extraterritorial | 2022 |
| VTM Group Limited | Real estate | 2021 |
| Vtsgh Limited | Hospitality | 2022 |
| Vtsgh Property Limited | Real estate | 2022 |
| Vuis Properties Limited | Real estate | 2021 |
| Vulture Holdings Limited | Wholesale & retail | 2025 |
| Vynex Solution Ltd | Wholesale & retail | 2026 |
| Vyno Ltd | Wholesale & retail | 2026 |
| Vyral Digital Ltd | Information & communication | 2025 |
| W E Cole Limited | Wholesale & retail | 1956 |
| W F T Haulage Limited | Transport & logistics | 2006 |
| W G Blight Partnership | | 2003 |
| W M Deane Limited | Wholesale & retail | 2006 |
| W P a King Limited | Wholesale & retail | 1999 |
| W. Harris of Chelmsford Limited | Transport & logistics | 1962 |
| W. J. Groom Carpet Contracts Limited | | 1983 |
| W.& H.Marriage & Sons Limited | Manufacturing | 1961 |
| W.H. Burdess Chemists Limited | Wholesale & retail | 1998 |
| W.J. Smith (Insulations) Limited | Water & waste | 1964 |
| W.J.Knight(Farms)Limited | Agriculture & fishing | 1941 |
| W.L. Paxon & Company Limited | Wholesale & retail | 1975 |
| W.Larkins Limited | Construction | 1971 |
| Wahalla Limited | Wholesale & retail | 2026 |
| Wailing Daughters of Zion Global (Wdozgbl) Ltd | Other services | 2025 |
| Wakepharm Services Limited | Health & social care | 2003 |
| Wakes Management Limited | Real estate | 2006 |
| Walk With Walker Ltd | Information & communication | 2015 |
| Walker Management Limited | Professional & scientific | 1976 |
| Wallace Manufacturing Ltd | Manufacturing | 2020 |
| Wallace Rose Electrical Ltd | Energy | 2004 |
| Wallum Farms Limited | Agriculture & fishing | 1952 |
| Walt Properties & Estates Ltd | Real estate | 2024 |
| Walter Farthing (Trust) Limited | Health & social care | 1957 |
| Waltham Abbey Youth 2000 | Health & social care | 1997 |
| Wanderwell Locums Limited | Health & social care | 2025 |
| Waqar Arshad Ltd | Wholesale & retail | 2025 |
| Waqsato Ltd | Wholesale & retail | 2026 |
| Ward & Vanlint Limited | Construction | 2004 |
| Wardrop Security Joinery Limited | Manufacturing | 2009 |
| Wargm Trading Limited | Arts & recreation | 2024 |
| Warmhouse Services Ltd | Construction | 2002 |
| Warner Marine Services Ltd. | Administrative & support | 2001 |
| Warner-Talbott Limited | Information & communication | 2007 |
| Warren Farm Two (Stanway) Management Company Limited | Households | 1993 |
| Warren Lane Properties Limited | Real estate | 1991 |
| WAS (Components) Limited | Manufacturing | 1996 |
| Wash Windows Limited | Administrative & support | 2007 |
| Washington Project Management Ltd | Professional & scientific | 2007 |
| Waterbrowns Driving Ltd | Water & waste | 2025 |
| Waterman Britannia International Ltd | | 1999 |
| Watson Admin Ltd | Administrative & support | 2003 |
| Watson Homes & Building Services Limited | Real estate | 2007 |
| Watt Works Consultancy Ltd | Construction | 2025 |
| WCM Consultants Limited | Construction | 2003 |
| WD Pharma (UK) Limited | Wholesale & retail | 2013 |
| WDF Contracts Ltd | Construction | 2021 |
| WDF Investments Ltd | Real estate | 2023 |
| WE Buy ANY Flat Ltd | Real estate | 2015 |
| WE Buy ANY House (Southeast) Ltd | Real estate | 2015 |
| WE Make Invisible Robots Ltd | Professional & scientific | 2025 |
| We-Win 2GEDER Limited | Wholesale & retail | 2022 |
| Wearnix Ltd | Wholesale & retail | 2026 |
| Web Methods Ltd | Information & communication | 2006 |
| WEB3COUNTY Ltd | Information & communication | 2023 |
| Webbs Consultancy Ltd | Professional & scientific | 2021 |
| Webform Limited | Information & communication | 2005 |
| Webgeek Technologies Ltd | Information & communication | 2025 |
| Webshop Limited | Information & communication | 1995 |
| Wedropsites Ltd | Information & communication | 2026 |
| Weekly NAI Baat London Limited | Information & communication | 2013 |
| Weeks Property Company Limited | Real estate | 2002 |
| Weelba Engineering Services Limited | Construction | 2007 |
| Weeley Farms Limited | Agriculture & fishing | 1963 |
| Weeley Football Club CIC | Arts & recreation | 2026 |
| Weez Optics Limited | Health & social care | 2024 |
| Weir Road 92A Ltd | Administrative & support | 1998 |
| Weknics Ltd | Wholesale & retail | 2023 |
| Weksilum Ltd | Wholesale & retail | 2026 |
| Wellesley House Residents Association Limited | Households | 2004 |
| Wellington Building Services Limited | Construction | 1999 |
| Wellington Investors Limited | Financial services | 2025 |
| Wellington Trading UK Limited | Transport & logistics | 1992 |
| Wellnesscohub Ltd | Wholesale & retail | 2023 |
| Wellwood Investments Limited | Real estate | 2006 |
| Weltree Ltd | Wholesale & retail | 2002 |
| Welwyn Garden Osteopaths Limited | Health & social care | 2003 |
| Wembley Stadium Limited | Professional & scientific | 2007 |
| Wendy Associate Limited | Professional & scientific | 2007 |
| Wenham Engineering & SON Ltd | Professional & scientific | 2024 |
| Wentworth Development Properties Limited | Construction | 1965 |
| Wentworth Developments Limited | Construction | 1966 |
| Wesbroom Engineering Limited | Manufacturing | 2000 |