| Toshiba TEC U.K. Imaging Systems Limited | Manufacturing | 2000 |
| Toss Global Management Limited | Information & communication | 2022 |
| Total Tennis GB Ltd | Arts & recreation | 2012 |
| Town CRT. Farm Limited | Construction | 2026 |
| TPH Enterprises Ltd | Real estate | 2020 |
| Tpmg Geomatics Consulting Limited | Extraterritorial | 2018 |
| Tradle Ltd | Administrative & support | 2024 |
| Training Luxury (UK) Limited | Education | 2014 |
| Trans European Plastics Limited | Extraterritorial | 1988 |
| Transglobal Metals Limited | Manufacturing | 2019 |
| Transport Management & Bookkeeping Services Ltd | Transport & logistics | 2024 |
| Traydaht Ltd | Information & communication | 2018 |
| Treats 4 Dogs Ltd | Wholesale & retail | 2025 |
| TRI County Plumbing and Heating Ltd | Construction | 2024 |
| Trident Dealerships Limited | Financial services | 2026 |
| Trident Garages Limited | Wholesale & retail | 1963 |
| Trident Property Holdings (Ottershaw) Limited | Financial services | 2026 |
| Trident Property Holdings Limited | Financial services | 2025 |
| Trinity Road Studios Ltd | Information & communication | 2025 |
| Trojan Projects Limited | Administrative & support | 2005 |
| Truett Holdings Limited | Professional & scientific | 2022 |
| TS Tech Strategies Ltd | Information & communication | 2025 |
| TSN Solutions Ltd | Information & communication | 2016 |
| TU Morada Ltd | Real estate | 2019 |
| TU Vivienda Property Ltd | Real estate | 2019 |
| Tutoring Futures Limited | Education | 2009 |
| Twenty Springwell Road Ltd | Real estate | 2026 |
| U T Ogden Ltd | Professional & scientific | 2017 |
| Ubon Partners Management Services Limited | Professional & scientific | 2024 |
| Ubon Partners Nominee Limited | Financial services | 2024 |
| UK Cars Accident Repair Limited | Wholesale & retail | 2023 |
| UK Parks Limited | Real estate | 2017 |
| Ukap Limited | Extraterritorial | 1981 |
| Ukbg Limited | Manufacturing | 2014 |
| Ultra International UK Limited | Wholesale & retail | 2017 |
| Umbrella Storage Limited | Transport & logistics | 2019 |
| Unicorn Childcare CDE Ltd | Education | 2022 |
| Unidecor Limited | Construction | 2010 |
| Universalfashion.Ltd Ltd | Arts & recreation | 2020 |
| Uniweb Limited | Information & communication | 1999 |
| Unravel Ltd | Information & communication | 2021 |
| Uplift Investment Group Ltd | Construction | 2020 |
| Upward Capital Limited | Financial services | 2023 |
| Urban Download Limited | Arts & recreation | 2010 |
| Urban Prep Co Ltd | Wholesale & retail | 2026 |
| V-Cliff Consultancy Limited | Professional & scientific | 2016 |
| V.M.C.Limited | Manufacturing | 1951 |
| Valorant Protective Solutions Limited | Wholesale & retail | 2025 |
| Value Adders Limited | Information & communication | 2008 |
| VANQUISH2025 Ltd | Construction | 2025 |
| Varshaw Investments Limited | Real estate | 2015 |
| VEI Global Ltd | Information & communication | 2013 |
| Velox Auto Limited | Wholesale & retail | 2025 |
| Verony Ltd | Wholesale & retail | 2024 |
| Versan Limited | Manufacturing | 2003 |
| Versan Management Limited | Construction | 2022 |
| VG Restaurants Ltd | Hospitality | 2024 |
| Victoria Seascape Limited | Wholesale & retail | 2023 |
| Victory Creation Ltd | Manufacturing | 2018 |
| Victory Lettings Surrey LLP | | 2025 |
| Video Editor EM Ltd | Information & communication | 2021 |
| Village Pottery Ltd | Arts & recreation | 2021 |
| Village Pottery Online Ltd | Arts & recreation | 2023 |
| Vine Mews (Chertsey) Management Ltd | Professional & scientific | 2012 |
| Vink UK Limited | Wholesale & retail | 1975 |
| Vision Build and Design Ltd | Construction | 2024 |
| Vita One Limited | Real estate | 2021 |
| Vital Academy Limited | Administrative & support | 2023 |
| Vivianahealth Limited | Transport & logistics | 2020 |
| Vmax Engineering Ltd | Wholesale & retail | 2023 |
| VN Neurology Services Ltd | Health & social care | 2025 |
| VVC Group Ltd | Construction | 2026 |
| W&A Consular Ltd | Professional & scientific | 2020 |
| W&A Consular World 1 (UN) Limited | Professional & scientific | 2024 |
| W.S. Hunt's Contract Hire Limited | Transport & logistics | 1988 |
| W.S. Hunt's Holdings Limited | Professional & scientific | 2001 |
| W.S. Hunt's Properties Limited | Real estate | 1961 |
| W.S. Hunt's Transport Limited | Transport & logistics | 1949 |
| W.S.Hunt's Service Stations Limited | Wholesale & retail | 2004 |
| W.W.D Limited | Hospitality | 2025 |
| Walker Solutions Ltd | Education | 2018 |
| Wallace Chiropractic Limited | Health & social care | 2015 |
| Warblington Street Holdings Limited | Financial services | 2024 |
| Warblington Street Ltd | Administrative & support | 2022 |
| Warj Ltd | Wholesale & retail | 2023 |
| Warren Park (Ottershaw) Management Limited | Other services | 1997 |
| Waterguruz Limited | Manufacturing | 2025 |
| Watford Construction and Maintenance Ltd | Construction | 2021 |
| Wayward Brand Ltd | Other services | 2026 |
| WE Group Holdings Limited | Financial services | 2026 |
| WE R PR Ltd | Professional & scientific | 2025 |
| We'Ve GOT Balls Limited | Arts & recreation | 2018 |
| Weavers UK Limited | Extraterritorial | 2005 |
| Wedgeglen Limited | Wholesale & retail | 1980 |
| Wegetgeo Limited | Administrative & support | 2013 |
| Well Kids Ltd | Health & social care | 2015 |
| Welling Limited Liability Partnership | | 2008 |
| Wendon Aviation Consultancy Limited | Other services | 2016 |
| Westbrooke Surveyors Limited | Professional & scientific | 2014 |
| Wethepeople Consulting Ltd | Professional & scientific | 2015 |