| Torrino Limited | Wholesale & retail | 2017 |
| Tower Clean Services Limited | Administrative & support | 2018 |
| Tower House (Hoddesdon) Management Company Limited | Real estate | 2004 |
| Towers & Co (Services) Limited | Wholesale & retail | 1990 |
| Towers & Co.,Limited | Wholesale & retail | 1898 |
| Towers Barron Limited | Wholesale & retail | 1990 |
| Towers Meats Limited | Wholesale & retail | 1984 |
| Towers Pension Scheme Trustees Limited | Financial services | 1989 |
| Towers Thompson Holdings Limited | Wholesale & retail | 1997 |
| Towers Thompson Limited | Wholesale & retail | 1987 |
| Towers Thompson Seafood Limited | Wholesale & retail | 1988 |
| Trade Algorithm Limited | Wholesale & retail | 2023 |
| Tradefield Services Ltd | Administrative & support | 2022 |
| Train Insane OR Remain the Same Limited | Arts & recreation | 2018 |
| Tranby Park Residential Management Company Limited | Households | 2019 |
| Trans GAL Ltd | Transport & logistics | 2022 |
| Trans Stefan Matasa Ltd | Transport & logistics | 2018 |
| Transport Construction Ltd | Construction | 2025 |
| Travelette & Co Limited | Administrative & support | 2024 |
| Treasury Court Ltd | Households | 2002 |
| Trees and Plants Unlimited Wholesale Ltd | Wholesale & retail | 2022 |
| Tregowan FOX Limited | Professional & scientific | 2019 |
| Trends Beauty Limited | Other services | 2016 |
| Trent 2 Limited | Real estate | 2014 |
| Trent Works (Nottingham) Management Company Limited | Households | 2021 |
| Trevethow Riel (Truro) Residents Management Company Limited | Households | 2016 |
| Trevor Jones & Partners Ltd | Professional & scientific | 2017 |
| Trilogy Residents Management Company Limited | Households | 2025 |
| Trinity Court Management Company (Ferndale) Limited | Households | 2002 |
| Trinity Village (Phase 3) Residents Company Limited | Households | 2013 |
| Trinity Village (Phase 4) Residents Company Limited | Extraterritorial | 2014 |
| Triquetra EHS Consultancy Limited | Professional & scientific | 2006 |
| Troutbeck Close Management Company Limited | Real estate | 1993 |
| True Opps Ltd | Real estate | 2017 |
| Trumpet Productions Limited | Arts & recreation | 2010 |
| Trvlez Ltd | Information & communication | 2026 |
| TTB Consulting Ltd | Extraterritorial | 2012 |
| TTS Vehicle Services Ltd | Wholesale & retail | 2023 |
| TTT Acquisitions Ltd | Administrative & support | 2025 |
| Tudor Gardens (Wylde Green) Management Company Limited | Households | 2002 |
| Tuesday KIM Ltd | Professional & scientific | 2022 |
| Turek Trans Ltd | Transport & logistics | 2022 |
| Tusbar Flat Management Company Limited | Households | 1982 |
| Tusk Holdings Limited | Construction | 1920 |
| Twenty Three Craven Hill Gardens (Management Company) Limited | Households | 1981 |
| Twigger Investments Limited | Financial services | 2016 |
| Twin Flame Stationery Ltd | Manufacturing | 2025 |
| Twinflames Foods Ltd | Hospitality | 2025 |
| Two Twos Curb Limited | Hospitality | 2023 |
| Twoeighty Consulting Limited | Professional & scientific | 2023 |
| Twyford Road Residents Association Limited | Households | 1984 |
| Tyleigh Interiors Limited | Construction | 2018 |
| Tylers Cross Nursery Limited | Agriculture & fishing | 2011 |
| Ugur Limited | Other services | 2018 |
| UK Bike Skills Limited | Arts & recreation | 2009 |
| UK Blue Ltd | Administrative & support | 2026 |
| UK Decorating and Maintenance Ltd | Construction | 2024 |
| UK Fresh RM Ltd | Agriculture & fishing | 2024 |
| UK Jump City Ltd | Arts & recreation | 2016 |
| UK Pads Developments Ltd | Construction | 2018 |
| UK Salads Investments Limited | Real estate | 2014 |
| Uka$Ii Ltd | Wholesale & retail | 2018 |
| Ukrn Ltd | Financial services | 2018 |
| ULA Properties Ltd | Real estate | 2025 |
| Ulker Barbers Ltd | Other services | 2020 |
| Ultimate Pest Force Ltd | Other services | 2015 |
| Unbound MEN Limited | Other services | 2026 |
| Uncle Salads Ltd | Agriculture & fishing | 2023 |
| Union Studio Ltd | Professional & scientific | 2014 |
| Unique Aromas UK Limited | Manufacturing | 2019 |
| Unique Stone Surfaces Ltd | Manufacturing | 2017 |
| Unity Wharf (Management) Limited | Households | 1988 |
| Unse Ltd | Wholesale & retail | 2017 |
| UP and OUT Builds Ltd | Construction | 2017 |
| Upton (Miller Homes) Management Company Limited | Households | 2006 |
| Upton Block 1-3 (Miller Homes) Management Company Limited | Households | 2007 |
| Upton D2 Management Company Limited | Households | 2006 |
| Upward Trends Limited | Financial services | 2012 |
| Urbanterm Residents Management Limited | Administrative & support | 1988 |
| Urmston Square Management Company Limited | Households | 2014 |
| Usborne Mews Residents Association Limited | Households | 1986 |
| Utility Fitters Ltd | Construction | 2022 |
| V & a Chandelier Cleaning Limited | Administrative & support | 2016 |
| V & P Developments Ltd | Real estate | 2022 |
| V R Builders Ltd | Construction | 2018 |
| V&D Property Management Ltd | Real estate | 2026 |
| V.A.T. Watkins Investments Limited | Real estate | 1978 |
| Vale Abbey (Wallasey) Management Company Limited | Households | 2005 |
| Vale Croft Woods Management Company (Farnborough) Limited | Real estate | 2023 |
| Valentina Limited | Real estate | 2021 |
| Valentis Contractor Housing Ltd | Real estate | 2017 |
| Valentis Property & Maintenance Services Ltd | Construction | 2016 |
| Valley Gardens Phase 6 Management Limited | Households | 1994 |
| Valley Trucks Holdings Limited | Financial services | 2009 |
| Van Brugh Mews Management Company Limited | Households | 1994 |
| Van Hage & Company (Holdings) Limited | Real estate | 1959 |
| Vanguard (Grays) Management Company Limited | Households | 2001 |
| Vantage UK Finance Ltd | Information & communication | 2020 |
| Varney's Sarnies Ltd | Hospitality | 2024 |
| Varsity Gate Management Company (NO.2) Limited | Households | 1993 |