| Travail Invest PLC | Extraterritorial | 2009 |
| Tree View Designs Limited | Information & communication | 2009 |
| Trendzuk Ltd | Wholesale & retail | 2025 |
| Tridax Civils Limited | Professional & scientific | 2024 |
| Tridax Construction Limited | Construction | 2021 |
| Tridax Limited | Professional & scientific | 2015 |
| Tridax Maintenance Limited | Real estate | 2024 |
| Trident Traffic Management Ltd | Administrative & support | 2023 |
| Trigger Consultancy Limited | Professional & scientific | 2026 |
| Tristans Hannington Limited | Real estate | 1998 |
| True Environmental Services Ltd | Water & waste | 2017 |
| True Level Limited | Real estate | 2021 |
| Trueloo Ltd | Administrative & support | 2023 |
| Trustytec Limited | Wholesale & retail | 2025 |
| Tsanov Deliveries Ltd | Transport & logistics | 2023 |
| Tsi-Trucker Solution International Limited | Transport & logistics | 2016 |
| TT Lara's Works Ltd | Professional & scientific | 2025 |
| TTC Business Ltd | Wholesale & retail | 2022 |
| TTK Retail Ltd | Wholesale & retail | 2024 |
| Tudor Mews Associates Limited | Households | 2004 |
| Tudor Mews Flat Owners Limited | Real estate | 2004 |
| Tunecutter Limited | Information & communication | 2024 |
| Turrets Freeholders Limited | Households | 2006 |
| Turtek Limited | Information & communication | 2025 |
| Tushibotec Ltd | Information & communication | 2019 |
| Tuttlor Limited | Real estate | 2025 |
| Twentythree Studios Limited | Information & communication | 2020 |
| Twin Flame Lounge Limited | Hospitality | 2025 |
| TWS Digital Limited | Wholesale & retail | 2025 |
| TWS Goods Limited | Wholesale & retail | 2024 |
| U C L Coachbuilders Limited | Wholesale & retail | 1999 |
| UK Harbours Limited | Agriculture & fishing | 2024 |
| UK Hearing Aids Ltd | Wholesale & retail | 2021 |
| UK SME Capital LLC | | 2025 |
| Ultimate Network Services Ltd | Construction | 2020 |
| UN Express Ltd | Wholesale & retail | 2025 |
| Unifize Inc. | | 2022 |
| United Health Kent Ltd | Health & social care | 2010 |
| United International Transatlantic Consolidated Amalgamation Ltd | Extraterritorial | 2021 |
| Unreal Earth Limited | Wholesale & retail | 2017 |
| Unreasonable Expectations PLC | Extraterritorial | 2021 |
| Uplands Farm Barn Limited | Agriculture & fishing | 2026 |
| Upton Court Farm Limited | Wholesale & retail | 2022 |
| Upton Wood Building and Contracting Limited | Administrative & support | 2004 |
| Upton Wood Management Ltd | Real estate | 2006 |
| Urban Key Property Services Limited | Construction | 2025 |
| Urban Properties Development Limited | Construction | 2026 |
| Urban Property Developments Ltd | Real estate | 2018 |
| Urbanshare Property Management Limited | Households | 1987 |
| Use-Ip Limited | Administrative & support | 2008 |
| V 8 Limited | Real estate | 1999 |
| V I R Engineering Limited | Professional & scientific | 1994 |
| V&S Property Ventures Ltd | Real estate | 2026 |
| Valerie Campbell Ltd | Wholesale & retail | 2006 |
| Valeside Services Ltd | Wholesale & retail | 2016 |
| Valley Support Services Ltd | Administrative & support | 2015 |
| Valnik Transport Limited | Transport & logistics | 2015 |
| Vandon Court Freehold Limited | Real estate | 2006 |
| Vandon Investment Company Limited | Real estate | 2011 |
| Vans for Less Global Ltd | Wholesale & retail | 2022 |
| Vatikon Limited | Professional & scientific | 2016 |
| Vaughan Hammond Limited | Real estate | 2023 |
| Vdub Worx (UK) Ltd | Wholesale & retail | 2024 |
| VE Audio Group Limited | Financial services | 2024 |
| VER Sacrum Ltd | Wholesale & retail | 2017 |
| Verag-Unisped Ltd | Transport & logistics | 2020 |
| Vernon Investments Limited | Real estate | 1998 |
| Vertra Elevator Accessories Limited | Professional & scientific | 2019 |
| Vetra Supplies Limited | Wholesale & retail | 2025 |
| VFR GAS Limited | Construction | 2022 |
| Vico Talent Solutions Limited | Administrative & support | 2023 |
| Victoria Horn Publishing Limited | Information & communication | 1999 |
| Victoria Park (17) Limited | Real estate | 2023 |
| Victoria Park (18) Limited | Real estate | 2025 |
| Victoria Park (19) Limited | Real estate | 2023 |
| Victoria Park (25) Limited | Real estate | 2021 |
| Victoria Park (26) Limited | Real estate | 2025 |
| Vigilcom Ltd | Wholesale & retail | 2019 |
| Vigsam Limited | Administrative & support | 2017 |
| Viibe Ltd | Information & communication | 2024 |
| Viking Crew Limited | Administrative & support | 2018 |
| Viking Crew Management Limited | Administrative & support | 2010 |
| Viking Hospitality Limited | Administrative & support | 2014 |
| Viking Marine Consultants Limited | Professional & scientific | 2002 |
| Viking Marine Recruitment Limited | Administrative & support | 2002 |
| Viking Marine Services Limited | Professional & scientific | 2002 |
| Viking Marine Training Limited | Administrative & support | 1991 |
| Viking Marine Travel Limited | Professional & scientific | 2002 |
| Viking Maritime Group Limited | Administrative & support | 1989 |
| Vincent GAS Limited | Energy | 2024 |
| Vinoteq Ltd | Hospitality | 2019 |
| Virsa the Heritage Ltd | Hospitality | 2018 |
| Virtus Media Limited | Wholesale & retail | 2024 |
| Vista Marine Limited | Real estate | 1936 |
| Vita Vitalia Ltd | Hospitality | 2025 |
| Vitacare - Europe Limited | Wholesale & retail | 2014 |
| VJ Fitness (UK) Limited | Other services | 2018 |
| VOI Olodude Ltd | Health & social care | 2026 |
| Voice Express Limited | Information & communication | 2002 |
| Voltech Electrical Solutions Ltd | Construction | 2024 |