| Village IT & Technology Services Ltd | Other services | 2021 |
| Villains Incorporated Ltd. | Arts & recreation | 2013 |
| Vince Foster Limited | Professional & scientific | 2012 |
| Vintage Bay Home Ltd | Wholesale & retail | 2017 |
| Vintage Bay Ltd | Wholesale & retail | 2016 |
| Vintage Muze Limited | Wholesale & retail | 2022 |
| Vinyl Presents Limited | Manufacturing | 2016 |
| Viram Trading Limited | Wholesale & retail | 2023 |
| Virtual Media Enterprises Limited | Wholesale & retail | 2009 |
| Virtus Aluminium Systems Ltd | Construction | 2026 |
| Visao Living Limited | Hospitality | 2024 |
| Visick Plumbing and Heating Limited | Construction | 2009 |
| Visight Limited | Manufacturing | 2025 |
| Vista Shutters Limited | Other services | 2022 |
| Visual Audio Sensory Technology Ltd | Wholesale & retail | 2020 |
| Vita Fitness Studio Ltd | Arts & recreation | 2024 |
| Vitesse Enterprises Limited | Construction | 1990 |
| Vivaldi Partners Limited | Information & communication | 2003 |
| Vivienne Becker Ltd | Information & communication | 2012 |
| Vivienne Cherry Ltd | Administrative & support | 2020 |
| Viviid Design Ltd | Arts & recreation | 2022 |
| VM Accountancy (UK) Ltd | Professional & scientific | 2014 |
| VNM Consulting Limited | Professional & scientific | 2013 |
| Vocablia Limited | Information & communication | 2011 |
| Voila Creation Limited | Other services | 2009 |
| Volaria Human Factors Ltd | Education | 2025 |
| Voltage Darts Limited | Arts & recreation | 2024 |
| VOO Media Limited | Wholesale & retail | 2016 |
| Voyage Content Limited | Professional & scientific | 2021 |
| VP Capital Management Ltd | Professional & scientific | 2014 |
| Vproc Limited | Information & communication | 2013 |
| Vrolijkheid Ltd | Health & social care | 2018 |
| Vrtue Ltd | Information & communication | 2023 |
| VS Audio Limited | Information & communication | 2023 |
| VSC Engineering Limited | Construction | 2025 |
| VSS Logistic Ltd | Transport & logistics | 2019 |
| VW Audi Specialist Ltd | Wholesale & retail | 2016 |
| Vynett Limited | Professional & scientific | 2010 |
| Vytech Limited | Professional & scientific | 2015 |
| W Choice Luxury Limited | Wholesale & retail | 2025 |
| W. Hammond Contractors Limited | Construction | 1954 |
| W.B.Gatward & SON Limited | Wholesale & retail | 1948 |
| Wagstaffs Hitchin Limited | Professional & scientific | 1996 |
| Waivesanalytics Ltd | Information & communication | 2025 |
| Walby House Management Company Limited | Households | 2020 |
| Walden Nurseries Ltd | Agriculture & fishing | 2025 |
| Walker Holdings Group Ltd | Financial services | 2026 |
| Walkern Windows & Homes Ltd | Construction | 2019 |
| Walkin at Deep Dale Limited | Hospitality | 2021 |
| Walking Talking Therapy Ltd | Education | 2023 |
| Wallace Court (Bancroft) Freehold Ltd | Households | 2023 |
| Wallace Court (Bancroft) Management Company Limited | Households | 2006 |
| Wally Steele Limited | Information & communication | 2000 |
| Walnut Tree Holdings Limited | Real estate | 2018 |
| Walnut Tree Shoot Limited | Agriculture & fishing | 2021 |
| Walsworth Commercial Ltd | Extraterritorial | 2019 |
| Walsworth Publishing Limited | Information & communication | 2000 |
| Walton and Keen Property Limited | Real estate | 2023 |
| Walton Hassell & Port Limited | Real estate | 1910 |
| Want HER Outfit Limited | Wholesale & retail | 2013 |
| Wanted Products Limited | Wholesale & retail | 2023 |
| Ward Home & Garden Ltd | Construction | 2017 |
| Waste NOT Want NOT Nurturing Plants and People CIC | Agriculture & fishing | 2012 |
| Water Lane Productions Limited | Arts & recreation | 2023 |
| Water Mist & Fire Engineering Limited | Professional & scientific | 2005 |
| Water to Go International Ltd | Manufacturing | 2021 |
| Waterhall Joinery Ltd | Construction | 2010 |
| Waterhall Livery Limited | Agriculture & fishing | 2014 |
| Watermore Ventures Limited | Financial services | 2022 |
| Waters Group Ltd | Financial services | 2025 |
| Waterside Court Ltd | Real estate | 2012 |
| Watford Maths LLP | | 2024 |
| Watson Hill Lines Group Limited | Professional & scientific | 2018 |
| Watts & Co., (Specialist Painting & Decorating) Limited | Construction | 2002 |
| Wave 9 Managed Services Limited | Information & communication | 1963 |
| Waveco Productions Limited | Administrative & support | 2019 |
| WBL Consultancy Ltd | Professional & scientific | 2019 |
| WE SEE NOW Limited | Extraterritorial | 2013 |
| Wealdkent Limited | Real estate | 2003 |
| Webdingbats by Design Ltd | Professional & scientific | 2018 |
| Webgoblin Ltd | Information & communication | 2010 |
| Websmart Tech Limited | Information & communication | 2023 |
| Wedonotbuyanycar.Com Limited | Construction | 2011 |
| Weewa UP Limited | Wholesale & retail | 2025 |
| Weight Loss Hertfordshire Ltd | Health & social care | 2022 |
| Well Healthcomms Ltd | Other services | 2024 |
| Well Media Global Limited | Information & communication | 2018 |
| Well Run Sports Limited | Wholesale & retail | 2010 |
| Wellbury Consulting Limited | Construction | 2025 |
| Wellington Evans Ltd | Real estate | 2021 |
| Wells Project Services Limited | Construction | 2025 |
| Wells Property Maintenance Limited | Construction | 2012 |
| Welwyn Park Homes Limited | Construction | 2019 |
| Wendy Jane Homes Limited | Real estate | 2025 |
| Wendy Johnstone Limited | Administrative & support | 2014 |
| Wesley Close Management Freehold Limited | Households | 2007 |
| West Hill Publishing Limited | Information & communication | 2012 |
| West Living Limited | Real estate | 1987 |
| Westbrook Court (Management) Limited | Households | 1987 |
| Westgate Bidco Limited | Other services | 2021 |