| Tylers Fencing Limited | Administrative & support | 2011 |
| UK Maintenance and Construction Ltd | Construction | 2014 |
| UKC Digital Limited | Administrative & support | 2021 |
| Ultimate Kricket Challenge Limited | Administrative & support | 2021 |
| UM Labs Limited | Information & communication | 2006 |
| Um-Labs R&D Limited | Information & communication | 2016 |
| Underwood Financials Ltd | Professional & scientific | 2023 |
| Unicity Foundation | Administrative & support | 1996 |
| Unicorn Hot Air Balloons Ltd | Professional & scientific | 2018 |
| Unidraw Limited | Professional & scientific | 1997 |
| Unite Talent Limited | Administrative & support | 2026 |
| United Smile Ltd | Health & social care | 2022 |
| Universal Sportswear Limited | Other services | 2021 |
| Urban Heights Scaffolding & Roofing Ltd | Construction | 2024 |
| Urban Oak Select Ltd | Wholesale & retail | 2026 |
| Urban Scaffolding Ltd | Construction | 2002 |
| Urmi Raval Limited | Health & social care | 2021 |
| Usrtec Limited | Information & communication | 2007 |
| Utility Soft LLP | | 2013 |
| V&V Nails Ltd | Other services | 2019 |
| Vaani Properties Limited | Real estate | 2016 |
| Valiant Trawlers Limited | Agriculture & fishing | 1991 |
| Valley Barbers Caterham Ltd | Other services | 2025 |
| Vanna Housing & Property Management Limited | Real estate | 2020 |
| Vass&Ells Ltd | Construction | 2020 |
| Vaultguard Ltd | Manufacturing | 2025 |
| Vayas Developments Ltd | Construction | 2019 |
| VDO LDN Ltd | Transport & logistics | 2019 |
| Vegan Baby Ltd | Hospitality | 2018 |
| Vegor Trading Ltd | Wholesale & retail | 2025 |
| Ventex 24 Ltd | Real estate | 2024 |
| Verdantor Tree Specialists Limited | Administrative & support | 2024 |
| Versatile Flooring Limited | Construction | 2016 |
| Verumcura Ltd | Administrative & support | 2024 |
| VG Partners Limited | Wholesale & retail | 2020 |
| VIC Gibson Butchers Limited | Wholesale & retail | 2003 |
| Vigilant Group Holdings Limited | Financial services | 2019 |
| Vigilant Group Property Limited | Financial services | 2019 |
| Vigilant Group Services Limited | Manufacturing | 2019 |
| VIK Management Ltd | Professional & scientific | 2025 |
| Village Green Media Limited | Professional & scientific | 2007 |
| Vintage Bargains Limited | Administrative & support | 2002 |
| Virtuoso Security Ltd | Information & communication | 2013 |
| Viruma Limited | Hospitality | 2013 |
| Vishal Ltd | Professional & scientific | 2019 |
| Visio Voce Limited | Professional & scientific | 2016 |
| Vision Care England Limited | Administrative & support | 2020 |
| VISION4SPORT Limited | Arts & recreation | 2011 |
| Vitrux Ltd | Information & communication | 2023 |
| Vitrux Shield Limited | Information & communication | 2025 |
| Vivid Aurora Limited | Manufacturing | 2024 |
| Vlad&Db Ltd | Construction | 2015 |
| Vmsih Limited | Professional & scientific | 2023 |
| Vnb-Oni Limited | Real estate | 2021 |
| VOIP4WORK Ltd | Information & communication | 2009 |
| Volare Travel Management Ltd | Administrative & support | 2022 |
| Volta Limited | Information & communication | 2019 |
| Volta Renewables Ltd | Wholesale & retail | 2026 |
| Voyager Estates Ltd | Professional & scientific | 2024 |
| VRA Solutions Limited | Professional & scientific | 2011 |
| Vuzo Ltd | Professional & scientific | 2017 |
| VX by Chantelle Ltd | Administrative & support | 2025 |
| W O’Brien & Sons (Properties) Limited | Real estate | 2025 |
| W.R. Pape Gunmakers Limited | Other services | 2019 |
| W3GLOBAL UK Ltd | Administrative & support | 2021 |
| WAC Consulting Services Limited | Information & communication | 2011 |
| Wags Dogs Day Care Ltd | Other services | 2021 |
| Wahc Limited | Financial services | 2015 |
| Waheguru Trading Ltd | Other services | 2012 |
| Wakehurst Roofing Limited | Construction | 2024 |
| Walk-In Arch Limited | Professional & scientific | 2020 |
| Walker Electricians Ltd | Construction | 2026 |
| Walkiez Limited | Other services | 2024 |
| Walksteady Limited | Professional & scientific | 2007 |
| Wallaroo Consulting Limited | Administrative & support | 2011 |
| Wallis Carpentry and Construction Limited | Construction | 2022 |
| Walton Heating Company Limited | Construction | 2013 |
| Warren Residents Security Community Interest Company | Administrative & support | 2018 |
| Wasteman Ltd | Water & waste | 2025 |
| Wayne’S Way Removal Services Limited | Transport & logistics | 2025 |
| WD Holdco Ltd | Financial services | 2025 |
| WE LAY LOW Ltd | Wholesale & retail | 2025 |
| WE Love Plants Limited | Administrative & support | 2010 |
| Weald Properties Limited | Real estate | 2017 |
| Web Tech Digital Limited | Information & communication | 2015 |
| Wegorekreate Limited | Manufacturing | 2014 |
| Welbos Limited | Real estate | 2024 |
| Well Kempt Gardens Ltd | Administrative & support | 2016 |
| Well Woodwork Ltd | Manufacturing | 2021 |
| Wendy Arnold & Co Ltd | Education | 2009 |
| Wentworth Surety Limited | Financial services | 2000 |
| West London Young Care Limited | Health & social care | 2024 |
| West London Young Living Ltd | Health & social care | 2023 |
| Westbrook Care Ltd | Health & social care | 2020 |
| Westbrook Healthcare LLP | | 2019 |
| Westfielding Limited | Information & communication | 2014 |
| Westhill Dwellings Ltd | Real estate | 2026 |
| Weve Technology Ltd | Information & communication | 2026 |
| WFS Consulting Limited | Financial services | 1999 |
| WH Lane Property Ltd | Real estate | 2012 |