| TRI County Golf Cars Limited | Other services | 2009 |
| Trillium Real Estate Enterprise Ltd | Real estate | 2018 |
| Trim Fadeys Limited | Other services | 2025 |
| Trinitas Gaming Ltd | Information & communication | 2020 |
| Tripitaka Limited | Administrative & support | 2008 |
| Triple Fit Physio Ltd | Other services | 2024 |
| Tripple M & a Property Ltd | Real estate | 2026 |
| Troupe 22 Ltd | Arts & recreation | 2024 |
| Truecut Diamond Drilling Limited | Construction | 2007 |
| Truegear Trading Limited | Administrative & support | 2008 |
| Truetrack Ltd | Administrative & support | 2026 |
| Truetrust Limited | Real estate | 1997 |
| Truewall Group Limited | Construction | 2024 |
| Truly Madly Deeply Limited | Wholesale & retail | 2008 |
| Trustediq EBT Limited | Administrative & support | 2026 |
| Trustediq Technologies Limited | Information & communication | 2025 |
| TS Accountants Limited | Professional & scientific | 2024 |
| TS CSV QA Ltd | Information & communication | 2017 |
| Tsavior Ltd | Wholesale & retail | 2025 |
| Tsveti Group Ltd | Wholesale & retail | 2026 |
| TT Day Limited | Construction | 2022 |
| TTB Canterbury Ltd | Wholesale & retail | 2024 |
| Tucker Robinson Associates Ltd | Professional & scientific | 2007 |
| Tudor Group Holdings Limited | Financial services | 2019 |
| Tudor Holdings (UK) Limited | Financial services | 2013 |
| Tuesday's Feature Ltd | Information & communication | 2024 |
| Tuition Academy (Maidstone) Limited | Education | 2012 |
| Tuition Extra (Kent) Limited | Education | 2014 |
| Tuition Extra Group Ltd | Financial services | 2022 |
| Tunedox Limited | Professional & scientific | 2021 |
| Tunstead Farms | Professional & scientific | 1900 |
| Tupak Ltd | Real estate | 2023 |
| Turi House Ltd | Hospitality | 2017 |
| Turi Ltd | Real estate | 2017 |
| Turnbull Wallis Associates Ltd | Administrative & support | 2017 |
| Turner Bathrooms Limited | Construction | 2022 |
| Turner Investment Group Limited | Professional & scientific | 2022 |
| Turner Street Holdings Limited | Real estate | 2017 |
| Turner's Game Poultry & Meats. Limited | Wholesale & retail | 2013 |
| Turnkeydc Limited | Professional & scientific | 2015 |
| Turpentine Limited | Other services | 2022 |
| Turquoise Istanbul Limited | Hospitality | 2023 |
| TUS Consultancy Limited | Professional & scientific | 2021 |
| TUS Contractor Services Ltd | Real estate | 2015 |
| Twelve Percent Ltd | Wholesale & retail | 2022 |
| Twiggers Limited | Wholesale & retail | 1998 |
| Two Counties Foods Holdings Limited | Financial services | 2013 |
| Two Counties Foods Limited | Wholesale & retail | 1984 |
| Two Sawyers Ltd | Hospitality | 2023 |
| Twrpa Ltd | Arts & recreation | 2025 |
| Tychicus Consult Ltd | Transport & logistics | 2025 |
| Tyfymz Ltd | Hospitality | 2024 |
| Tyler's Kiln Public House Limited | Hospitality | 2013 |
| TZ Town Planners Ltd | Professional & scientific | 2019 |
| U Z Creation Limited | Wholesale & retail | 2025 |
| Udoka Iyoha Ltd | Manufacturing | 2024 |
| Ugur 27 Ltd | Other services | 2021 |
| UK Academic Exploration Ltd | Professional & scientific | 2026 |
| UK Barber (Canterbury) Ltd | Other services | 2021 |
| UK Dried Foods Ltd | Wholesale & retail | 2025 |
| UK Educo Ltd | Education | 2019 |
| UK Graphics Supplies Limited | Administrative & support | 2023 |
| UK Health, Safety & Environmental Training Limited | Professional & scientific | 2009 |
| UK Innovation Industries (Ukii) Ltd | Information & communication | 2025 |
| UK Mobile Bars Ltd | Hospitality | 2009 |
| UK Photo Prints Ltd | Manufacturing | 2023 |
| UK Raine Motors Limited | Other services | 2021 |
| UK Shopverse Ltd | Wholesale & retail | 2025 |
| UK Vaparettes Limited | Wholesale & retail | 2014 |
| Uk-China Education Limited | Education | 2014 |
| Ukfibrenet Limited | Information & communication | 2014 |
| Ulasi River Limited | Construction | 2025 |
| Ultrasensors Ltd | Professional & scientific | 2020 |
| Ultrasound Services Kent Limited | Administrative & support | 2013 |
| UM Associates Limited | Professional & scientific | 2025 |
| Uncontained Performance Limited | Arts & recreation | 2025 |
| Under OUR Roof Ltd | Construction | 2018 |
| Undercover Support Services Limited | Professional & scientific | 2026 |
| Underwood Court Limited | Households | 1989 |
| Unight U.K. Ltd | Arts & recreation | 2014 |
| Unimbeck Consulting Ltd | Real estate | 2024 |
| Uniquely Sophia's Limited | Wholesale & retail | 2019 |
| Unit 6 East Ltd | Professional & scientific | 2013 |
| Unit Hair Studio Ltd | Other services | 2025 |
| United by POP Limited | Information & communication | 2019 |
| United Converting (UK) Ltd. | Manufacturing | 2004 |
| United Taxi Canterbury Ltd | Transport & logistics | 2022 |
| Unity Arts Collective Limited | Arts & recreation | 2024 |
| Unity Fire & Security Services Ltd | Administrative & support | 2026 |
| Universal Advisory Limited | Administrative & support | 2012 |
| Universal Organisation Ltd. | Wholesale & retail | 2025 |
| Univox Data Limited | Information & communication | 2025 |
| Unusually Tall Stories Ltd | Information & communication | 2012 |
| UP & OUT Platforms Ltd | Construction | 2020 |
| Upton & Sons Limited | Other services | 1930 |
| Urban Bites Foods Ltd | Hospitality | 2026 |
| Urban Chic Limited | Wholesale & retail | 2015 |
| Urban Farm Consultancy Limited | Professional & scientific | 2025 |
| Urban Farm-Group Ltd | Agriculture & fishing | 2025 |
| Urban Farm-It Limited | Agriculture & fishing | 2025 |