| Thecook'Scompany Ltd | Manufacturing | 2026 |
| Thereforyou Ltd | Administrative & support | 2022 |
| Theresa Henry Services Limited | Professional & scientific | 2019 |
| Thesefaway Ltd | Information & communication | 2026 |
| Threethings Limited | Wholesale & retail | 2026 |
| Thrill on Grill Limited | Hospitality | 2024 |
| Thunder Cars Ltd | Wholesale & retail | 2025 |
| Tidy Car Garage Limited | Wholesale & retail | 2022 |
| Tiger Real Estate Ltd | Real estate | 2023 |
| Tikayo Ltd | Wholesale & retail | 2024 |
| TIM Hygiene Services Ltd | Administrative & support | 2018 |
| Tima’S Taste Ltd | Hospitality | 2025 |
| Time of Books Ltd | Wholesale & retail | 2025 |
| Timeryder Productions Ltd | Other services | 2011 |
| Times for Media & Studies Ltd | Information & communication | 2025 |
| Tinee Care Ltd | Health & social care | 2023 |
| Tiny Store Limited | Wholesale & retail | 2020 |
| Tirlor Consultancy Limited | Professional & scientific | 2012 |
| Tirmizi Trips Ltd | Administrative & support | 2024 |
| Tkaczyk Ltd | Construction | 2015 |
| TM Solid Core Ltd | Construction | 2026 |
| TN Hire Services Ltd | Transport & logistics | 2016 |
| Tokash Consultancy Limited | Real estate | 2014 |
| Toll Global Forwarding (UK) Limited | Transport & logistics | 1987 |
| Toll Global Forwarding Group (UK) Limited | Professional & scientific | 1994 |
| Toll Group (UK) Ltd | Professional & scientific | 2010 |
| Toll Investments (NA) Ltd | Professional & scientific | 2010 |
| Toll Investments (UK) Ltd | Professional & scientific | 2010 |
| TOM & Jerry Pestcontrol Limited | Agriculture & fishing | 2025 |
| Tomay Properties Limited | Real estate | 2020 |
| Tommy Atkins Movie Limited | Professional & scientific | 2021 |
| Toor Homes Ltd | Real estate | 2022 |
| Top Blokes Ltd | Construction | 2017 |
| Top Build London Ltd | Construction | 2024 |
| Top-Cuts Carpentry Ltd | Manufacturing | 2024 |
| TOP1 Scaffolding Ltd | Construction | 2019 |
| Topp Scaff 2025 Limited | Construction | 2025 |
| Topshield Roofing&Building Ltd | Construction | 2026 |
| Total Airside Project Support Limited | Extraterritorial | 2014 |
| Touch Pro+ Ltd | Wholesale & retail | 2025 |
| TPS Security Services Ltd | Administrative & support | 2025 |
| Tradenomic Limited | Financial services | 2023 |
| Trainee Ventures Limited | Information & communication | 2024 |
| Trans AMC Ltd | Transport & logistics | 2020 |
| Trans-Rst Limited | Transport & logistics | 2019 |
| Transcontinental Business Ltd | Wholesale & retail | 2020 |
| Transdev Airport Services Limited | Wholesale & retail | 2019 |
| Transdev Autonomous Services Limited | Transport & logistics | 2025 |
| Transit Pro Ltd | Transport & logistics | 2024 |
| Transport Revolution Group Ltd | Transport & logistics | 2020 |
| Transports HA Ltd | Transport & logistics | 2023 |
| Travel Agent Boss Ltd | Administrative & support | 2026 |
| Travel Bookings Ltd | Transport & logistics | 2023 |
| Traveldeal Limited | Transport & logistics | 2000 |
| Travelserve Limited | Transport & logistics | 2013 |
| Trch Ltd | Construction | 2025 |
| Treckwell Service Ltd | Transport & logistics | 2021 |
| Tredstone Property Holdings Limited | Real estate | 2024 |
| Trenz Space Ltd | Information & communication | 2026 |
| TRI0TRANSPORT Ltd | Transport & logistics | 2019 |
| Trinity Palace Ltd | Real estate | 2023 |
| Triple S Consulting Limited | Information & communication | 2014 |
| Tripvlog Ltd | Information & communication | 2022 |
| Tropesphere Limited | Information & communication | 2025 |
| Truck Spa Limited | Administrative & support | 2019 |
| True Value Properties Ltd | Real estate | 2020 |
| Tsaryves Ltd | Information & communication | 2022 |
| TTK Associates Limited | Health & social care | 2025 |
| Tudose Repairs Ltd | Construction | 2019 |
| Tunisi Promotions Ltd | Other services | 2018 |
| TV 99 Limited | Wholesale & retail | 2014 |
| U.A Solutions Ltd | Wholesale & retail | 2018 |
| U1 Holdings Ltd | Real estate | 2025 |
| UA Supplies Limited | Wholesale & retail | 2022 |
| UB7 Investments Ltd | Real estate | 2021 |
| Ubiqueso Limited | Professional & scientific | 2023 |
| Udan International Limited | Wholesale & retail | 2020 |
| UGS Holdings Limited | Financial services | 2023 |
| UGS Midco Limited | Financial services | 2023 |
| UGS Real Estate Limited | Financial services | 2023 |
| UK Aquire Limited | Real estate | 2020 |
| UK Breakdown Recovery Limited | Transport & logistics | 2024 |
| UK Building Materials Limited | Construction | 2021 |
| UK Building Solutions Ltd | Construction | 2026 |
| UK Capital Services Ltd | Real estate | 2021 |
| UK College of Science & Management Ltd | Education | 2021 |
| UK Construction Group Limited | Construction | 2026 |
| UK Education Bridge Limited | Education | 2025 |
| UK Gateway Study Limited | Education | 2025 |
| UK Global ION Limited | Wholesale & retail | 2023 |
| UK Goan Events Limited | Hospitality | 2022 |
| UK Investment Company 210 Limited | Financial services | 2018 |
| UK Investment Company 211 Holdco Limited | Financial services | 2018 |
| UK Investment Company 211 Limited | Hospitality | 2018 |
| UK Investment Company 211 Mezz Holdco Limited | Financial services | 2018 |
| UK Investment Company 211 Mezzco Limited | Financial services | 2018 |
| UK J.V Ltd | Real estate | 2022 |
| UK Land & Property Development Ltd | Real estate | 2014 |
| UK Rental Hub Ltd | Real estate | 2024 |
| UK Silver Ipco Limited | Extraterritorial | 2018 |