| UE Coffee Roasters (UK) Limited | Financial services | 2013 |
| UE Coffee Roasters Limited | Wholesale & retail | 2009 |
| UE Coffee Roasters Trading Ltd | Wholesale & retail | 2026 |
| UK Building Plastics Direct Ltd | Extraterritorial | 2010 |
| UK Shade Solutions Ltd | Manufacturing | 2017 |
| UK Shower Panels Ltd | Wholesale & retail | 2024 |
| Uksg | Other services | 2001 |
| UKTECH2020 Ltd | Professional & scientific | 2018 |
| Ultimatum Combat Gear Ltd | Wholesale & retail | 2026 |
| UN Air D'Antan Limited | Manufacturing | 2017 |
| Unbranded Generic Clothing Ltd | Manufacturing | 2024 |
| Undercliff Property Services Limited | Construction | 2021 |
| Uniform Tooling Limited | Extraterritorial | 2022 |
| Union Court Insurance Services Limited | Real estate | 1964 |
| Union Jack Technologies Limited | Extraterritorial | 2000 |
| Unique Chandeliers Ltd | Manufacturing | 2018 |
| United Kingdom Emergency Response Training (Ukert) CIC | Education | 2016 |
| Unity Witney Limited | Administrative & support | 2025 |
| Universal Mobile Enterprises Limited | Wholesale & retail | 2009 |
| UNU Financial Holdings Ltd | Professional & scientific | 2005 |
| UR Container Storage Ltd | Real estate | 2022 |
| Urban & Wild Creative Ltd | Professional & scientific | 2018 |
| Urban Consult Ltd | Administrative & support | 2016 |
| Urban Peak Group Ltd | Wholesale & retail | 2026 |
| Urodermatology Ltd | Health & social care | 2019 |
| V-One Eleven Consulting Ltd | Professional & scientific | 2023 |
| V-Tac (UK) Limited | Wholesale & retail | 2013 |
| V-Tac Exports Limited | Extraterritorial | 2011 |
| V.Blessed Limited | Health & social care | 2015 |
| Vale & Wold LLP | | 2024 |
| Valentine Industries Ltd | Wholesale & retail | 2025 |
| Valentine UK Investments Limited | Real estate | 2021 |
| Valhalla Games Ltd | Wholesale & retail | 2022 |
| Valorar Ltd | Financial services | 2024 |
| Valuecare Holdings Ltd | Health & social care | 2024 |
| Van 4 YOU Ltd | Transport & logistics | 2017 |
| Van Aerde UK Limited | Wholesale & retail | 2017 |
| Vanessa Corley Limited | Professional & scientific | 2019 |
| VAR Haulage Ltd | Transport & logistics | 2024 |
| VAR Logistics Ltd | Transport & logistics | 2020 |
| Vault VA Limited | Administrative & support | 2024 |
| Velocity 1ST Limited | Other services | 2014 |
| Velocity Multisport Ltd | Extraterritorial | 2004 |
| Velox Precision Ltd | Manufacturing | 2025 |
| Vendredi.Ai Limited | Information & communication | 2025 |
| Ventana Services Ltd | Financial services | 2016 |
| Venture Engineering Limited | Manufacturing | 2015 |
| Venture Industries Group Limited | Financial services | 2026 |
| Venture Innovations Limited | Professional & scientific | 2020 |
| Verdanta Environmental Services Limited | Water & waste | 2025 |
| Veri Artigiani Constructions Ltd | Construction | 2022 |
| Verve & Virtue Ltd | Other services | 2016 |
| Viapilates Limited | Arts & recreation | 2024 |
| Vibes and Visibility Ltd | Professional & scientific | 2024 |
| Vicks Byways Garage Limited | Wholesale & retail | 2025 |
| Vicky Hawkins Project Management Ltd | Professional & scientific | 2013 |
| Victrix Holdings Ltd | Financial services | 2026 |
| Vienna Grace Limited | Financial services | 2024 |
| Vinotext Limited | Arts & recreation | 2003 |
| Vinum Investments Limited | Hospitality | 2021 |
| Virki Ltd | Financial services | 2024 |
| Virtual Engine Limited | Information & communication | 2008 |
| Virtualnet Marketing Limited | Information & communication | 2011 |
| Visions Made Ltd | Other services | 2019 |
| Visit Oxford Tours Limited | Administrative & support | 2019 |
| Vital York Limited | Information & communication | 2006 |
| Vitality Building Limited | Construction | 2025 |
| Vitor Kneipp & Company Limited | Professional & scientific | 2025 |
| VIV Group Ltd | Construction | 2023 |
| Vives & Rolfe Ltd | Wholesale & retail | 2025 |
| Voices of Ewanme Ltd | Manufacturing | 2023 |
| Volaris Education UK Limited | Financial services | 2026 |
| Volt PER Octave Ltd | Information & communication | 2023 |
| Volta Eco UK Limited | Wholesale & retail | 2025 |
| Volunteer Link-Up (West Oxfordshire) | Health & social care | 2009 |
| W Derbyshire Properties Limited | Real estate | 2021 |
| W Dudley Limited | Construction | 2012 |
| W J Armstrong (Construction) Ltd | Construction | 2012 |
| W.H.Edginton & Sons Limited | Agriculture & fishing | 1955 |
| Wagging Rights Ltd | Wholesale & retail | 2025 |
| Wain & Francis Homes Limited | Construction | 2007 |
| Wain & Francis Limited | Construction | 1997 |
| Waitspace Ltd | Information & communication | 2025 |
| Walker Enterprises (Productions) Limited | Transport & logistics | 2003 |
| Wallingford Rowing Club (Trading) Limited | Other services | 2023 |
| Walnut Paddock Management Company Limited | Households | 2023 |
| Walters Electrical Limited | Construction | 2019 |
| Wantage Road Management Company Ltd | Other services | 2019 |
| Wapping Property Developments Limited | Construction | 2025 |
| Ward Bros Developments Limited | Construction | 2017 |
| Warden Consulting Limited | Professional & scientific | 2022 |
| Wareham & Associates Ltd | Professional & scientific | 2000 |
| Wastec Limited | Water & waste | 2001 |
| Wastie Electrical Contracting Limited | Manufacturing | 2025 |
| Wastie's Orchard Residents Association Limited | Households | 1997 |
| Waters Concierge Ltd | Administrative & support | 2021 |
| Wathegar Wind Farm LLP | | 2008 |
| Wattgen AI Limited | Information & communication | 2026 |
| Wattle Lake Ltd | Real estate | 2025 |
| Watts Tutoring Ltd | Education | 2021 |