| Vnus Ltd | Real estate | 2025 |
| Vofo Sports Management & Consultancy Ltd | Arts & recreation | 2018 |
| Vovome Limited | Arts & recreation | 2021 |
| Voytek FDI Ltd | Professional & scientific | 2025 |
| VPN Ghostwalk Limited | Wholesale & retail | 2018 |
| Vrinda Software Ltd | Information & communication | 2016 |
| VTA Services Ltd | Administrative & support | 2020 |
| Vuecare Limited | Health & social care | 2021 |
| Vulcan Pools Limited | Manufacturing | 2019 |
| VVH Limited | Professional & scientific | 2015 |
| W H Roofing and Building Services Limited | Construction | 2016 |
| W Sack Electrics Limited | Construction | 2022 |
| W.Austin & Sons (Stevenage) Limited | Other services | 1958 |
| W.E. Waygood & SON Limited | Agriculture & fishing | 1963 |
| W.J. Rowe Limited | Wholesale & retail | 2003 |
| W1 EPS Group Limited | Financial services | 2025 |
| W9 Properties Limited | Real estate | 2019 |
| W9 Property Development Limited | Real estate | 2018 |
| W9 Property Management Limited | Real estate | 2019 |
| Wade-O-Scope Ltd | Wholesale & retail | 2014 |
| Wagram Holding UK Limited | Real estate | 2023 |
| Wakering Audio Visual Services Ltd | Arts & recreation | 2014 |
| Walker on the Wild Side Ltd | Wholesale & retail | 2025 |
| Walkern Management Company Limited | Households | 2008 |
| Wall Away Ltd | Construction | 2020 |
| Wallace Engineering Consultancy Ltd | Construction | 2025 |
| Wallfix DUO Ltd | Construction | 2024 |
| Walpole Design and Build Ltd | Construction | 2017 |
| Walsh Solutions Ltd | Energy | 2021 |
| Walter Hawley Solutions Limited | Information & communication | 2012 |
| Walton Homes Estates Limited | Real estate | 2020 |
| Walton Homes Holdings Limited | Financial services | 2023 |
| Walton Homes Pest Control Limited | Administrative & support | 2023 |
| Wang Holdings Limited | Real estate | 2024 |
| Wanomichi Hertfordshire Limited | Arts & recreation | 2019 |
| Warden Developments Limited | Real estate | 1995 |
| Warden Residential Limited | Real estate | 2023 |
| Warm Films Limited | Information & communication | 2013 |
| Warnclothing Limited | Other services | 2017 |
| Warren Point Communications Ltd. | Information & communication | 1989 |
| Warren Surfacing Ltd | Construction | 2021 |
| Warren Wood Park Ltd | Real estate | 2018 |
| Wascott Enterprises Ltd | Administrative & support | 2009 |
| Waste Mission Limited | Extraterritorial | 2023 |
| Waste Removal London Ltd | Transport & logistics | 2018 |
| Watches & More Limited | Other services | 2021 |
| Waterfall Enterprise Limited | Health & social care | 2019 |
| Waterloo Farm Wellness Ltd | Other services | 2024 |
| Waterlow Mews Management Company Limited | Households | 1994 |
| Waters Edge (Haverhill) Management Company Limited | Households | 2006 |
| Waterstone Properties Limited | Other services | 2010 |
| Watton Place Lifestyle Clinic Ltd | Health & social care | 2018 |
| Watts Electrical Maintenance Ltd | Construction | 2025 |
| Waveroad Management Limited | Households | 2018 |
| Wawelski Ltd | Wholesale & retail | 2010 |
| Waygood Holdings Ltd | Financial services | 2021 |
| WB Accountant Ltd | Professional & scientific | 2023 |
| Wbmsc Ltd | Other services | 2024 |
| WD247 Ltd | Wholesale & retail | 2018 |
| WE Came, WE SAW, WE Conquered Studios Limited | Information & communication | 2014 |
| WE Form Online Ltd | Administrative & support | 2017 |
| WE Grow Businesses Ltd | Professional & scientific | 2013 |
| WE Heart Pole Limited | Arts & recreation | 2012 |
| WE LET YOU Rent Limited | Real estate | 2015 |
| WE Love Pets Hitchin Ltd | Other services | 2024 |
| WE Print Everything Ltd | Manufacturing | 2022 |
| Wealthy Hats Ltd | Financial services | 2024 |
| Weareidyll Records Ltd | Information & communication | 2020 |
| Weatherwell Limited | Wholesale & retail | 1999 |
| Weaver Bird Properties Limited | Real estate | 2013 |
| Webdarline Limited | Information & communication | 2019 |
| Websafe Systems Limited | Extraterritorial | 2015 |
| Wedgewood Workshop Ltd | Manufacturing | 2024 |
| Weeklyreport.Io Limited | Information & communication | 2023 |
| Wefixnow Investment Limited | Professional & scientific | 2009 |
| Wefixnow Limited | Construction | 1997 |
| Welch Couriers Ltd | Other services | 2012 |
| Welding Tool Services Limited | Professional & scientific | 1996 |
| Welding Tool Supplies Limited | Manufacturing | 1991 |
| Wellover Limited | Real estate | 1965 |
| Wells Securities Limited | Financial services | 2005 |
| Wemah Labs Ltd | Wholesale & retail | 2025 |
| Werx Limited | Manufacturing | 1991 |
| West Associates International Limited | Financial services | 2020 |
| West Dorset Hygienist and Implants Ltd | Health & social care | 2017 |
| West Hill Medical Limited | Health & social care | 2016 |
| West Oak Joinery Holdings Limited | Manufacturing | 2026 |
| West One Cleaning Limited | Administrative & support | 2025 |
| West One Maintenance Limited | Real estate | 2026 |
| Westacres Engineering Limited | Professional & scientific | 2012 |
| Westaway Heights (Pilton) Management Limited | Administrative & support | 2004 |
| Westend Wifi Limited | Information & communication | 2013 |
| Western Atlas Ltd | Professional & scientific | 2006 |
| Western Truck Rental Limited | Administrative & support | 1987 |
| Westfield Residential Limited | Real estate | 2015 |
| Westrock Construction Ltd | Construction | 2026 |
| Wexford Capital Partners Ltd | Financial services | 2026 |
| Wglb Coaching Ltd | Arts & recreation | 2024 |
| WH Smiles Limited | Health & social care | 2025 |
| WH Web Design Ltd | Information & communication | 2025 |