| VNK Electrical Ltd | Construction | 2024 |
| Vnka Ltd | Construction | 2025 |
| VNL Limited | Professional & scientific | 2014 |
| VNN Learning Limited | Education | 2023 |
| Vodwork PS Limited | Information & communication | 2012 |
| Vogue Empire Ltd | Wholesale & retail | 2025 |
| Voip Supplies Limited | Information & communication | 2016 |
| Voipar UK Limited | Information & communication | 2019 |
| Voltvan Ltd | Wholesale & retail | 2025 |
| Vonel Consulting Ltd | Mining & quarrying | 2017 |
| Voodoo Entertainment Ltd | Arts & recreation | 2009 |
| Voosh Auto Care Ltd | Wholesale & retail | 2022 |
| Vorobets Services Ltd | Other services | 2022 |
| Voto Services Ltd | Wholesale & retail | 2025 |
| VOX Ummah Ltd | Information & communication | 2024 |
| VP Superstore Ltd | Wholesale & retail | 2026 |
| VR International Ltd | Wholesale & retail | 2015 |
| VR Productions Ltd | Information & communication | 2023 |
| Vrajbhumi Properties Ltd | Real estate | 2025 |
| Vren Groundworks Ltd | Construction | 2019 |
| VRR Smiles Limited | Financial services | 2025 |
| Vruttanova Ltd | Construction | 2025 |
| VS Supplies Ltd | Wholesale & retail | 2025 |
| VSA Trading Ltd | Wholesale & retail | 2021 |
| VSI Executive Education Ltd | Education | 2017 |
| VSK Infotech Limited | Information & communication | 2015 |
| Vtac Associates Ltd | Information & communication | 2021 |
| Vtrakit Ltd | Information & communication | 2018 |
| VTW13 Ltd | Real estate | 2025 |
| Vuco Ltd | Transport & logistics | 2018 |
| Vupax Solutions Limited | Information & communication | 2025 |
| VV Auto Specialists Ltd | Wholesale & retail | 2020 |
| VV Raja Ltd | Construction | 2026 |
| VWJ5 Property Limited | Real estate | 2020 |
| VXR Motors Ltd | Wholesale & retail | 2024 |
| Vyanjan Group Limited | Hospitality | 2024 |
| Vynari Ltd | Wholesale & retail | 2025 |
| W & T Holdings (UK) Limited | Extraterritorial | 2024 |
| W & T Properties Ltd | Real estate | 2024 |
| W Jewellers Ltd | Wholesale & retail | 2020 |
| W.R. (Slough) Management Company Limited | Households | 1986 |
| W10 Publishing Limited | Information & communication | 2016 |
| W13 Broadway Ltd | Construction | 2020 |
| W5 Works Ltd | Information & communication | 2017 |
| Waad Web Design Ltd | Construction | 2024 |
| WAD Productions Ltd | Information & communication | 2022 |
| Wafa KB Ltd | Wholesale & retail | 2019 |
| Wagjiani Group Limited | Financial services | 2025 |
| Wagjiani Investments Limited | Financial services | 2025 |
| WAH S Building Services Ltd | Construction | 2025 |
| Waha Products Ltd | Wholesale & retail | 2021 |
| Wahidee Ltd | Information & communication | 2026 |
| Waikato UK Ltd | Professional & scientific | 2024 |
| Waite Davies LET Limited | Real estate | 2015 |
| Waite Davies Limited | Real estate | 2014 |
| Waiz Contractors Limited | Construction | 2021 |
| Wajid Driving School Limited | Education | 2024 |
| Wakeel Properties Ltd | Real estate | 2022 |
| WAL Mechanical Solutions Ltd | Construction | 2026 |
| Waleed Premier Ltd | Wholesale & retail | 2025 |
| WALL2WALL Construction Service Limited | Construction | 2024 |
| Wallis Construction Limited | Construction | 2026 |
| Wallis Peri Peri Limited | Hospitality | 2022 |
| Waltz Corporation Ltd | Professional & scientific | 2024 |
| Wanda Dining Limited | Hospitality | 2018 |
| Wani Medical Limited | Health & social care | 2023 |
| Wanis Trading Ltd | Real estate | 2024 |
| Wanlogix Ltd | Information & communication | 2019 |
| Warburtons (Isle of Wight) Limited | Wholesale & retail | 2007 |
| Warck IT Solutions Ltd | Information & communication | 2025 |
| Warfighter Nutrition Limited | Hospitality | 2025 |
| Wargrave (2024) Ltd | Wholesale & retail | 2024 |
| Washwood Heath Ltd | Construction | 2018 |
| Wassal & Wesal Limited | Real estate | 2026 |
| Wassup London Events UK Ltd | Manufacturing | 2024 |
| Waste Media Agency Ltd | Professional & scientific | 2023 |
| Waszero Design Ltd | Professional & scientific | 2023 |
| Watan Market Ltd | Wholesale & retail | 2021 |
| Watch the Market Ltd | Wholesale & retail | 2026 |
| Watchify Ltd | Professional & scientific | 2024 |
| Water Road Properties Ltd | Construction | 2020 |
| Watford for Roads & Bridges Construction Ltd | Construction | 2020 |
| Watford Orthodontic Practice Limited | Health & social care | 2014 |
| WATFORD1 Property Limited | Real estate | 2025 |
| Wattleaf Limited | Construction | 2025 |
| Waverley Hills Associates Ltd | Real estate | 2022 |
| Waves Media Limited | Professional & scientific | 2015 |
| Wavetech Consulting Limited | Information & communication | 2024 |
| Waxeem Ecommerce Limited | Wholesale & retail | 2025 |
| Way 2 Kleen Ltd | Other services | 2012 |
| Way TOO Sexy Ltd | Hospitality | 2025 |
| Wayfinder Learning Ltd | Education | 2025 |
| Wayne Clark Ltd | Construction | 2016 |
| Wayne's Mechanics Services Limited | Wholesale & retail | 2020 |
| WD Ortho Limited | Health & social care | 2017 |
| WD23 Management Company Limited | Households | 2024 |
| WE Discovr Ltd | Information & communication | 2024 |
| WE DO Verify Limited | Information & communication | 2020 |
| WE HR Limited | Professional & scientific | 2020 |
| WE Invest Properties Ltd | Real estate | 2022 |