| Turnleft Care Ltd | Health & social care | 2024 |
| Tutifreshsuperfoods Ltd | Hospitality | 2026 |
| Tvww Limited | Professional & scientific | 2017 |
| TW Builds Ltd | Construction | 2021 |
| Twentytwo Life Sciences Ltd | Professional & scientific | 2025 |
| Twin Peaks Properties Ltd | Real estate | 2025 |
| Twinbrooks Management Company Limited | Households | 1990 |
| Twizel Publishing Limited | Information & communication | 2022 |
| Two Lines Meet Limited | Professional & scientific | 2018 |
| Twosea Limited | Information & communication | 2004 |
| Twyford Management Limited | Households | 2016 |
| Tyler Roofing Limited | Real estate | 1984 |
| Type Digital Ltd | Professional & scientific | 2019 |
| TZ Consult Ltd | Construction | 2025 |
| TZ Homes Ltd | Real estate | 2025 |
| U Padel Ltd | Wholesale & retail | 2025 |
| Ubik Studio Ltd | Information & communication | 2021 |
| Ufuk Bartender Ltd | Hospitality | 2019 |
| Ugley Duckling Limited | Health & social care | 2014 |
| Uhnw Ltd | Financial services | 2025 |
| UK Hoardings Ltd. | Administrative & support | 2018 |
| UK Solmar Limited | Wholesale & retail | 2020 |
| Ukglimpse Ltd | Information & communication | 2025 |
| UKI Flooring Services Limited | Construction | 1999 |
| Ulterium Limited | Information & communication | 2011 |
| Ultra Design & Build Ltd | Construction | 2025 |
| Ultrawise Innovation Limited | Professional & scientific | 2016 |
| Umai Gourmet Company Limited | Hospitality | 2024 |
| Uncle Funk Ltd. | Arts & recreation | 2019 |
| Unfilteredlauren Limited | Professional & scientific | 2026 |
| Unique Construction Solutions Ltd | Financial services | 2015 |
| United Mail Ltd | Professional & scientific | 2024 |
| United Tools & Fixings Limited | Wholesale & retail | 2009 |
| Uniting Ambition Group Limited | Professional & scientific | 2019 |
| Uniting Enterprise Limited | Administrative & support | 2019 |
| Unity Health Care (Alliance) Ltd | Health & social care | 2013 |
| Universal Car Care Ltd | Wholesale & retail | 2025 |
| Universe Cleaning Ltd | Administrative & support | 2015 |
| Unlimited Brands Limited | Professional & scientific | 2011 |
| Unsung Marketing Limited | Other services | 2026 |
| Untangled Solutions Limited | Professional & scientific | 2006 |
| Untoldcgi Ltd | Information & communication | 2024 |
| Upfront Autosales Ltd | Wholesale & retail | 2025 |
| Upskill IVO Ltd | Transport & logistics | 2025 |
| Upwards and Outwards Building Ltd | Construction | 2025 |
| Upwick Ltd | Wholesale & retail | 2023 |
| Urban 8 Creative Solutions Ltd | Education | 2008 |
| Urban Exchange (ADA ST) Limited | Financial services | 2009 |
| Urban Gaff Limited | Information & communication | 2016 |
| USA Nails Design Ltd | Other services | 2025 |
| Uskip Ltd | Information & communication | 2017 |
| UX Writing Ltd | Professional & scientific | 2020 |
| V O'Regan Limited | Administrative & support | 2017 |
| V Owusu Ltd | Health & social care | 2017 |
| VA Associates Limited | Information & communication | 2009 |
| VA PR Services Ltd | Administrative & support | 2014 |
| Vagabonds Refuge Ltd | Wholesale & retail | 2026 |
| Valen Property Group Ltd | Real estate | 2025 |
| Valet Pro 26 Ltd | Manufacturing | 2026 |
| Valgerd Ltd | Real estate | 2023 |
| Van Tromp Holdings Ltd | Administrative & support | 2021 |
| Van Vinyl Limited | Administrative & support | 1995 |
| Vantix Midlands Limited | Professional & scientific | 2025 |
| Varley Projects Limited | Professional & scientific | 2025 |
| Vellum Limited | Information & communication | 2017 |
| Velocity (Paint & Body) Limited | Wholesale & retail | 2023 |
| Velocity Automotive Limited | Wholesale & retail | 2023 |
| Velocity Ventilation Services Ltd | Construction | 2023 |
| Vende UK Limited | Professional & scientific | 2016 |
| Venture Alliance Ltd | Wholesale & retail | 2025 |
| Venuescope Ltd | Information & communication | 2025 |
| Verena Hallam Ltd | Professional & scientific | 2021 |
| Veritas Carpentry Limited | Construction | 2007 |
| Vernons Farm Estate Residents' Association Limited | Households | 1965 |
| Verolabs Ltd | Professional & scientific | 2026 |
| Vertex Roofing Limited | Construction | 2006 |
| Vesna Wellness Limited | Manufacturing | 2025 |
| Vfire Limited | Construction | 2025 |
| VH Commercial Limited | Professional & scientific | 2026 |
| Victoria Grant Couture Ltd | Wholesale & retail | 2024 |
| Victoria Kain Ltd | Education | 2018 |
| Vient Solutions Ltd | Hospitality | 2024 |
| Village Bakery (Hertford) Ltd | Wholesale & retail | 2026 |
| Vintage Taverns Ltd. | Real estate | 1992 |
| Vinther Holdings Limited | Real estate | 2025 |
| Violas ME Limited | Hospitality | 2017 |
| Violets & Velvet Ltd | Wholesale & retail | 2012 |
| VIP Parcels Limited | Transport & logistics | 2016 |
| Viper Electrical Services Ltd | Construction | 2023 |
| Virevo Active Limited | Wholesale & retail | 2025 |
| Virtual BEE Ltd | Administrative & support | 2016 |
| Virtual Office World Ltd | Administrative & support | 2026 |
| Virtus Property Management Limited | Real estate | 2016 |
| Visiblespaces Ltd | Construction | 2023 |
| Vision Balconies Installations Limited | Construction | 2022 |
| Vision Electronics Ltd | Manufacturing | 2021 |
| Visionscapes Limited | Professional & scientific | 2022 |
| Vistan Ltd | Construction | 2011 |
| Vitabody Ltd | Wholesale & retail | 2025 |
| Vivid I.T. Limited | Information & communication | 1998 |