| Turick Ltd | Construction | 2013 |
| Turkish-Br Journalists Ltd | Professional & scientific | 2026 |
| Turn Your Light on C.I.C. | Education | 2020 |
| Turnbull KER LLP | | 2007 |
| Turner Security Group Ltd | Other services | 1991 |
| Turnstone Freight Services Ltd | Transport & logistics | 2023 |
| Turnstone Worldwide Logistics Limited | Transport & logistics | 2014 |
| Tutor Coop Ltd | Education | 2015 |
| Tutorfront Ltd | Education | 2019 |
| Tutoring Operations Limited | Education | 2024 |
| Tutortalent Limited | Education | 2018 |
| TUV UK Limited | Professional & scientific | 1979 |
| Tvfp Ltd | Real estate | 2017 |
| Tvox Ltd | Information & communication | 2022 |
| Twahir's Property Ltd | Real estate | 2025 |
| TWD Event Planners Ltd | Real estate | 2025 |
| TWD Plumbing and GAS Services Ltd | Construction | 2024 |
| Tweets Touch Ltd | Other services | 2025 |
| Twelve Middle ROW Limited | Wholesale & retail | 2018 |
| Twelve Thirty Ltd | Real estate | 2020 |
| Twenty Fours Hustle Entertainment Limited | Information & communication | 2024 |
| TWENTY07 Development Ltd | Construction | 2025 |
| TWENTY20 Investments LLP | | 2012 |
| TWENTY20 Solutions Limited | Administrative & support | 2013 |
| Twice Nice Ltd | Wholesale & retail | 2021 |
| Twiin Art Ltd | Wholesale & retail | 2021 |
| Twin City Limited | Administrative & support | 2023 |
| Twin Oaks Management Company Limited | Households | 2003 |
| Twin Sparx Ltd | Information & communication | 2023 |
| Twins London Ltd | Wholesale & retail | 2020 |
| Twinsie Ltd | Hospitality | 2024 |
| Twinz Limited | Hospitality | 2019 |
| Twiss Square Management Company Limited | Households | 2009 |
| Twist Media Group Ltd | Professional & scientific | 2019 |
| Twitchy Limited | Transport & logistics | 2023 |
| Twixtly Limited | Professional & scientific | 2024 |
| Two Bishopswood Road Maintenance Limited | Households | 1966 |
| Two Impatient Ltd | Wholesale & retail | 2021 |
| Two Press Ltd | Wholesale & retail | 2025 |
| Two Time Limited | Wholesale & retail | 2018 |
| TWO3SIX Limited | Information & communication | 2020 |
| TWO3THIRTEEN Ltd. | Wholesale & retail | 2014 |
| Twothreeseven Ltd | Wholesale & retail | 2020 |
| TXL Capital Limited | Financial services | 2019 |
| TXL Developments Limited | Construction | 2019 |
| TXL Group Limited | Financial services | 2018 |
| TXW Housing Limited | Real estate | 2023 |
| Tydae Limited | Other services | 2007 |
| Tyde Developments Ltd | Real estate | 2023 |
| TYI Freight and Shipping Ltd | Other services | 2014 |
| TYK Superstore Ltd | Wholesale & retail | 2024 |
| Tyki Ltd | Information & communication | 2016 |
| Tykos Holdings UK Limited | Real estate | 2022 |
| Tyler House RTM Company Limited | Households | 2006 |
| Tyre Giant Ltd | Wholesale & retail | 2015 |
| Tyre Shred Disposal Ltd. | Water & waste | 1994 |
| Tyrell Park Limited | Real estate | 2024 |
| Tyrestooyou Ltd | Manufacturing | 2018 |
| TZG Partnership Limited | Professional & scientific | 2015 |
| TZG Property Management Ltd | Real estate | 2026 |
| U Khan Coperative Ltd | Transport & logistics | 2026 |
| U Mobile Phone Ltd | Wholesale & retail | 2025 |
| U.K Boyuan International Limited | Education | 2014 |
| UAS Property Group Ltd | Real estate | 2024 |
| Ubugme Limited | Other services | 2007 |
| Ubuntu Making IT Possible Community Interest Company | Education | 2024 |
| Uees Ltd | Hospitality | 2019 |
| Uemcc Ltd | Information & communication | 2024 |
| UFJ Ltd | Health & social care | 2023 |
| Ufone Accessories Hub Limited | Wholesale & retail | 2024 |
| Uganda Annual Sports Day UK Limited | Education | 2018 |
| Uganda Correspondent Publications Ltd | Professional & scientific | 2010 |
| Uganda Croydon Catholic Community | Other services | 2018 |
| UGO Properties Ltd | Real estate | 2018 |
| Ugohvill Portfolio Limited | Real estate | 2025 |
| Uhercik Limited | Health & social care | 2014 |
| UJ Logistics Solutions Limited | Transport & logistics | 2025 |
| UK Advocates Ltd | Professional & scientific | 2018 |
| UK AJO Services Ltd | Transport & logistics | 2025 |
| UK Beauty Supplier Limited | Wholesale & retail | 2025 |
| UK Beer & Soft Drinks Ltd | Wholesale & retail | 2015 |
| UK Bi-Fold Door Factory Ltd. | Construction | 2016 |
| UK Blue Eyes TCG Ltd | Wholesale & retail | 2025 |
| UK Boiler Company Ltd | Manufacturing | 2014 |
| UK Car Spray Limited | Wholesale & retail | 2013 |
| UK Coles Transmission Co., Ltd | Manufacturing | 2022 |
| UK Defenders Limited | Wholesale & retail | 2017 |
| UK Desserts (Lincoln) Ltd | Hospitality | 2017 |
| UK Elbest Life Science Co., Ltd | Administrative & support | 2023 |
| UK Global Ltd | Manufacturing | 2022 |
| UK Greensynta Agricultural Solutions Ltd | Administrative & support | 2025 |
| UK Home Heroes Ltd | Transport & logistics | 2025 |
| UK Homechef Ltd | Hospitality | 2025 |
| UK ID Food Ltd | Transport & logistics | 2020 |
| UK Jinma Import and Export Trading Co., Ltd | Wholesale & retail | 2025 |
| UK M P D Ltd | Real estate | 2017 |
| UK Maestro Productions Limited | Arts & recreation | 2022 |
| UK Milky Way Media Limited | Wholesale & retail | 2025 |
| UK Movement Collective Ltd | Education | 2022 |
| UK Nova Capital Holdings Co., Ltd | Wholesale & retail | 2025 |