| Victory to Victory Community Church Ltd | Other services | 2007 |
| Videojug Corporation Limited | Information & communication | 2005 |
| Viewpointcm Limited | Construction | 2010 |
| Vigra Ltd | Financial services | 2025 |
| Vikins Family Leisure Limited | Hospitality | 2023 |
| Vilaro Living Limited | Real estate | 2024 |
| Vilaro Oculoplastics Limited | Health & social care | 2020 |
| Vilcabamba Limited | Professional & scientific | 2010 |
| Vine Investment Company Limited (the) | Real estate | 1957 |
| Vintage Point Services Ltd | Administrative & support | 2025 |
| VIP Banquets Limited | Hospitality | 2005 |
| Virtus Projects Ltd | Construction | 2019 |
| Visao Research Limited | Professional & scientific | 2023 |
| Visiospective Ltd | Information & communication | 2019 |
| Visual Art Ltd | Other services | 2011 |
| Visual Developer Limited | Information & communication | 2000 |
| Visual Eyecare Ltd | Health & social care | 2011 |
| Visual Platform Global Ltd | Information & communication | 2024 |
| Vithusan AA Property Ltd | Real estate | 2026 |
| Viva Creative Flower Company Limited | Other services | 2017 |
| Vivid Graphics & Print Ltd | Construction | 2018 |
| Vivo Design Ltd | Construction | 2025 |
| Vlachos UK Limited | Manufacturing | 2014 |
| Vlcare Limited | Professional & scientific | 2018 |
| VM Smiles Ltd | Health & social care | 2024 |
| Voice LAB Ltd | Information & communication | 2015 |
| Volans Specialty Risks Limited | Financial services | 2023 |
| Volt Storage Ltd | Transport & logistics | 2025 |
| VP Taxi Group UK Limited | Transport & logistics | 2016 |
| VRD Consultancy Limited | Information & communication | 2013 |
| VRG Property Investment Ltd | Real estate | 2021 |
| VS FAM Ltd | Hospitality | 2025 |
| VS Marketing Solutions Ltd | Professional & scientific | 2025 |
| VSA Holdings Limited | Real estate | 2026 |
| Vsolv Technologies UK Limited | Information & communication | 2008 |
| VY Holdings Ltd | Health & social care | 2021 |
| W13 Projects Limited | Construction | 2023 |
| W3RIGGING Ltd | Construction | 2025 |
| W7 Consultancy Limited | Professional & scientific | 2018 |
| Wabi Holdings Ltd | Financial services | 2024 |
| Wacm Holdings Ltd | Financial services | 2025 |
| Wags in Style Limited | Other services | 2016 |
| Walden Retention Ltd | Professional & scientific | 2025 |
| Walker Group Holdings Ltd | Extraterritorial | 2021 |
| Walkwood Properties Limited | Real estate | 2012 |
| Walton Pier Catering Ltd | Hospitality | 2021 |
| Walton Pier Limited | Arts & recreation | 2016 |
| Want PC Help Limited | Information & communication | 2020 |
| Warren TV & Film Services Ltd | Information & communication | 2024 |
| Warriar Care Ltd | Health & social care | 2022 |
| Warriars Ltd | Education | 2020 |
| Waste & Site Services Limited | Water & waste | 2003 |
| Water Master Watford Ltd | Construction | 2025 |
| Waterboy Toys Limited | Professional & scientific | 2025 |
| Waterdell Place Management Limited | Households | 1998 |
| Waterfield Estates 27 Ltd | Real estate | 2015 |
| Waterfield Orchard Limited | Households | 2026 |
| Waterfront Global Consultants Limited | Professional & scientific | 2014 |
| Waterway Projects Ltd | Water & waste | 2014 |
| Waterways Heritage Limited | Administrative & support | 1989 |
| Watford Breakdown & Recovery Ltd | Transport & logistics | 2024 |
| Watford Physiotherapy and Sports Injury Clinic Limited | Health & social care | 2020 |
| Watford Roofing Limited | Construction | 1999 |
| Watford Roofing Services Limited | Professional & scientific | 2004 |
| Watford Sushi Ltd | Manufacturing | 2019 |
| Watford Women’S Health Limited | Health & social care | 2018 |
| Wattleton Associates Ltd | Professional & scientific | 2022 |
| Wavermarsh Development Co. Limited | Real estate | 1987 |
| WAX Information Technology Limited | Information & communication | 1997 |
| WD Subs Ltd | Real estate | 2014 |
| Web Dynamics Employees Trust Limited | Professional & scientific | 1997 |
| Web Dynamics Limited | Manufacturing | 1995 |
| Weirdough Wood Fired Pizza Limited | Hospitality | 2017 |
| Well Studio Digital Limited | Information & communication | 2014 |
| Wellbeing Africa Limited | Health & social care | 2024 |
| Wells Court Freehold Limited | Real estate | 2024 |
| Welmanne Dival Associates Ltd | Administrative & support | 2017 |
| Welmanne Dival Freohms Ltd | Real estate | 2013 |
| Welmanne Dival Group Ltd | Real estate | 2013 |
| Welmanne Dival Holdings Ltd | Financial services | 2020 |
| Welmanne Dival Investments Ltd | Financial services | 2013 |
| Welmanne Dival Management Ltd | Real estate | 2013 |
| Wendum Travel Services Limited | Administrative & support | 2008 |
| West 1 Executive Limited | Transport & logistics | 2012 |
| West END Surveying Ltd | Professional & scientific | 2023 |
| West Herts Golf Club Limited | Arts & recreation | 1894 |
| West Hyde Property Limited | Real estate | 2003 |
| West London Social Housing Limited | Construction | 2021 |
| Western Plant and Repair Ltd | Manufacturing | 2025 |
| Westernrock Limited | Construction | 2019 |
| Westmount Properties Ltd | Construction | 1994 |
| Westworld (Flats 5 and 6) Limited | Real estate | 2024 |
| Westworld Trading Limited | Real estate | 2014 |
| WF Consultancy Limited | Administrative & support | 2006 |
| Wheatley Events Limited | Hospitality | 2018 |
| Whisgars Ltd | Hospitality | 2019 |
| Whisperliner Limited | Other services | 2012 |
| White Bear Rickmansworth Ltd | Hospitality | 2013 |
| White SET Services Limited | Manufacturing | 2013 |
| Whitecloud Consultancy Limited | Information & communication | 2026 |