| Total Intelligence Solutions Ltd | Information & communication | 2022 |
| Total Sealing Solutions Ltd | Wholesale & retail | 2023 |
| Touch Robotics Ltd | Professional & scientific | 2025 |
| Touritec Enterprises Ltd | Administrative & support | 2018 |
| TP Music Ltd | Information & communication | 2024 |
| Trade World Enterprises Ltd | Wholesale & retail | 2021 |
| Tradewave Ltd | Wholesale & retail | 2025 |
| Training in Partnership Ltd | Education | 2026 |
| Trainstop Limited | Real estate | 1993 |
| Tralles Solutions Limited | Information & communication | 2017 |
| Transformation Goals Ltd | Professional & scientific | 2024 |
| Translations Direct Limited | Administrative & support | 2000 |
| Travelmagellan Limited | Administrative & support | 2012 |
| Treerunners Limited | Arts & recreation | 2011 |
| Treextreme Limited | Real estate | 2010 |
| Treloar Ltd | Manufacturing | 2020 |
| Trend Treats Limited | Wholesale & retail | 2026 |
| Tribex Services Ltd | Administrative & support | 2021 |
| Tribus Assets Limited | Real estate | 2018 |
| Trident Electrical Services Limited | Construction | 1996 |
| Trident Facilities Management Limited | Construction | 2022 |
| Trident Pools Ltd | Construction | 2017 |
| Triibe Haus Ltd | Information & communication | 2024 |
| Trillo Automation Ltd | Administrative & support | 2023 |
| Trimcourt Limited | Real estate | 1976 |
| Triple Flow Ltd | Construction | 2023 |
| TRS Tyre Specialists Limited | Wholesale & retail | 2015 |
| Truevo Ltd | Information & communication | 2018 |
| Truthpie Ltd | Administrative & support | 2018 |
| TRW Management Consulting Ltd | Wholesale & retail | 2026 |
| TS Networks Limited | Professional & scientific | 2012 |
| Tsessabe Limited | Professional & scientific | 2006 |
| Tucbox Ltd | Wholesale & retail | 2022 |
| Tuckwell Marine Limited | Wholesale & retail | 2002 |
| Tuesday Creative Solutions Ltd | Administrative & support | 2020 |
| Turnstyle Pictures Limited | Information & communication | 2024 |
| Tuscorp Ltd | Education | 2020 |
| TVA Media Ltd | Professional & scientific | 2021 |
| TWELVE20 Consultancy Ltd | Professional & scientific | 2025 |
| Twincastle Resources Limited | Real estate | 2019 |
| Two Bird Experiences & Education Ltd | Arts & recreation | 2020 |
| Tycon Group Limited | Extraterritorial | 2013 |
| U.K. Engineering & Lubricant Supplies Ltd | Professional & scientific | 2020 |
| Ubique Courier Services Ltd | Transport & logistics | 2019 |
| Udavey Ltd | Professional & scientific | 2026 |
| UK Fire Extinguisher Ltd | Wholesale & retail | 2026 |
| UK Goods Lift Company Ltd | Professional & scientific | 2023 |
| UK Lithuanian Youth Association C.I.C. | Other services | 2017 |
| UK Organic Association C.I.C. | Administrative & support | 2008 |
| UK Taishan Association Ltd | Other services | 2020 |
| UK Tanks and Vessels Limited | Manufacturing | 2022 |
| Ukroam Limited | Administrative & support | 2025 |
| Ultimate Surveys Ltd | Professional & scientific | 2020 |
| Ultraflow Group Limited | Financial services | 2020 |
| Umikai Sushi Ltd | Hospitality | 2024 |
| Umonde Holdings Ltd | Financial services | 2020 |
| Unbound Technologies Limited | Information & communication | 2025 |
| Unbranded Projects Ltd. | Manufacturing | 2024 |
| Unbreakable Projects Ltd | Professional & scientific | 2026 |
| Unite Property Ltd | Real estate | 2017 |
| United Shield International Limited | Manufacturing | 2005 |
| Unity (Southern) Ltd | Health & social care | 1997 |
| Uniwise Consultant Limited | Education | 2025 |
| UPCYCL3 Ltd | Wholesale & retail | 2023 |
| Upper Horns Farm LLP | | 2007 |
| Urbanedge Cars Ltd | Transport & logistics | 2025 |
| Urest Limited | Information & communication | 2016 |
| Uruz Limited | Financial services | 2020 |
| US UK Tax Ltd | Professional & scientific | 2026 |
| Utilities Unified Limited | Professional & scientific | 2008 |
| Uttel Ltd | Information & communication | 2023 |
| V & a Lettings Limited | Real estate | 2013 |
| Valiant Pest Management Ltd | Administrative & support | 2022 |
| Valley Bookkeeping Services Limited | Professional & scientific | 2010 |
| Valley Hot ROD Shop Limited | Wholesale & retail | 2008 |
| Valley Housing Ltd | Real estate | 2016 |
| Value Rater Platform Limited | Arts & recreation | 2018 |
| Values & Talent Ltd | Administrative & support | 2025 |
| Vama Rentals Limited | Real estate | 2025 |
| Van Wraps Limited | Administrative & support | 2017 |
| Van-Der-Plank Scaffolding Services Limited | Construction | 2011 |
| Vanandel Communication Management Ltd | Information & communication | 2025 |
| Vanda Digital Consulting Ltd | Information & communication | 2024 |
| Vangaroo Ltd | Transport & logistics | 2025 |
| Vangaroo T/A Sackville-West Ltd | Transport & logistics | 2021 |
| Vanguard Advisory Services Ltd | Information & communication | 2025 |
| Vanguard Contracting Services Ltd. | Construction | 2024 |
| Vanguard Holding Investment Limited | Financial services | 2023 |
| Vasey Engineering Ltd | Manufacturing | 2019 |
| Vawzen Engineering Ltd | Manufacturing | 2024 |
| Vector Retail Media Limited | Professional & scientific | 2024 |
| Veeanyi Services Ltd | Other services | 2023 |
| VEG Prep Ltd | Hospitality | 2022 |
| Veintiuno Limited | Real estate | 2014 |
| Velcourt Marketing Services Limited | Agriculture & fishing | 1999 |
| Velocity Strength & Conditioning Limited | Arts & recreation | 2024 |
| Venetian Finish Ltd | Construction | 2021 |
| Venetian Finish Plastering Ltd | Construction | 2026 |
| Venishaan Services Ltd | Wholesale & retail | 2016 |
| Venn International Ltd. | Professional & scientific | 2013 |