| TCA Monteagle Court Limited | Real estate | 2021 |
| TCA Rentals Ltd | Real estate | 2025 |
| Tcai Investments Limited | Households | 2015 |
| TCF Global Group Limited | Wholesale & retail | 2026 |
| TCL Interims Limited | Administrative & support | 2016 |
| TCL Remote Limited | Administrative & support | 2022 |
| TCL Rental Properties Limited | Real estate | 2016 |
| TCL Search Limited | Administrative & support | 2016 |
| TCL Surveyors Limited | Administrative & support | 2009 |
| TD Industry Ltd | Wholesale & retail | 2014 |
| TEACH365 Limited | Administrative & support | 2018 |
| Teagle Optics Co., Ltd | Wholesale & retail | 2023 |
| TEB International Limited | Wholesale & retail | 2022 |
| TEC Fluid Automation UK Ltd | Manufacturing | 2023 |
| Tech Access Limited | Information & communication | 2009 |
| Tech Threat Ltd | Administrative & support | 2017 |
| Tech-Option Limited | Information & communication | 2003 |
| Techcrete Limited | Professional & scientific | 1986 |
| Techgeezer Limited | Information & communication | 2017 |
| Techlink Global Co., Limited | Wholesale & retail | 2025 |
| Technical-Security 365 Ltd | Administrative & support | 2026 |
| Technofin Limited | Information & communication | 2021 |
| Technology and Strategy Co., Ltd | Information & communication | 2026 |
| Technology-Check Ltd | Administrative & support | 2017 |
| Techsphere Ltd | Manufacturing | 2023 |
| Techventure Limited | Professional & scientific | 2007 |
| Tecnica FA CIC | Arts & recreation | 2026 |
| Tecnica FA Coaching Ltd | Education | 2026 |
| Tecnica Football Academy Limited | Arts & recreation | 2016 |
| Tecno Electric Limited | Manufacturing | 2022 |
| Tedebebe International Group Limited | Extraterritorial | 2018 |
| Teejaysworld Limited | Other services | 2020 |
| Teenix Life Co., Ltd | Wholesale & retail | 2019 |
| Tees Union Co., Limited | Extraterritorial | 2018 |
| Teffet International Netherlands Ltd. | Manufacturing | 2025 |
| Tejpata Ltd | Hospitality | 2022 |
| TEK Design Solution Ltd | Professional & scientific | 2025 |
| Tekredi Solutions Ltd | Real estate | 2018 |
| Televenture Consulting Limited | Professional & scientific | 2016 |
| Tellesma Fund Management LLP | | 2007 |
| Tellesma GP Limited | Real estate | 2008 |
| Tellesma LLP | | 2009 |
| Tellesma LP Limited | Real estate | 2008 |
| Tellesma Sustainable Real Estate Opportunity Fund | | 2008 |
| Telos Point Property Ltd | Real estate | 2025 |
| Telos Trading Limited | Wholesale & retail | 2025 |
| Temco International Ltd | Extraterritorial | 2018 |
| Temp Works Associates Limited | Administrative & support | 2009 |
| Tendermaster Limited | Extraterritorial | 2000 |
| Tengda Electronics Limited | Manufacturing | 2023 |
| Tenghai Trading Co., Ltd | Manufacturing | 2025 |
| Tengjin Trade Co., Ltd | Wholesale & retail | 2019 |
| Tenn Group Limited | Education | 2025 |
| Tenstu Ltd | Professional & scientific | 2024 |
| Tensure Trading Company Ltd | Extraterritorial | 2014 |
| Tentō Records Ltd | Hospitality | 2022 |
| Tenville Limited | Construction | 1998 |
| Terence Musical Instrument Limited | Extraterritorial | 2021 |
| Tergui Co., Ltd | Extraterritorial | 2020 |
| Terraflux Innovations Technologies Ltd | Information & communication | 2025 |
| Terre Verdi Limited | Manufacturing | 2015 |
| Tertiary IT Limited | Information & communication | 2012 |
| TES Build Ltd | Construction | 2017 |
| TES Facilities Management Limited | Construction | 2009 |
| Tesion Limited | Real estate | 2023 |
| Tetra Mind Ltd | Manufacturing | 2024 |
| Teulon Management Limited | Real estate | 2022 |
| Tezigo Clothing Group Co., Ltd. | Wholesale & retail | 2021 |
| TF New Material Co., Ltd | Extraterritorial | 2019 |
| TFF Trading Limited | Manufacturing | 2020 |
| TG Creative Ltd | Information & communication | 2018 |
| TH Didcot Limited | Construction | 2020 |
| Thal Properties Limited | Real estate | 2018 |
| Thaler Industrial Co., Ltd | Wholesale & retail | 2016 |
| Thames Innovation UK Ltd | Wholesale & retail | 2024 |
| THB Craft Trading Co., Ltd | Wholesale & retail | 2013 |
| THE (Sake) French Company Limited | Manufacturing | 2026 |
| THE 12TH Ltd | Arts & recreation | 2021 |
| THE 311 Consultancy Ltd | Construction | 2018 |
| THE Address Beckenham Limited | Real estate | 2012 |
| THE African Lakes Corporation Limited | Professional & scientific | 2006 |
| THE Alpine Generation Ltd | Administrative & support | 2013 |
| THE Arnold-Smith Group Limited | Real estate | 2020 |
| THE Barbers Room Limited | Other services | 2004 |
| THE Barn Car Repairs Limited | Wholesale & retail | 2020 |
| THE Belt and Road International Federation of Literature and Arts | Professional & scientific | 2026 |
| THE Best Cantus Limited | Information & communication | 2021 |
| THE Birdcage Walworth Limited | Hospitality | 2021 |
| THE Boreal Canoe Tripping Company Ltd | Arts & recreation | 2021 |
| THE Bowen and Emmett Clinic Ltd | Other services | 2022 |
| THE Butcher BOY Limited | Wholesale & retail | 2020 |
| THE Carriage Car Group Ltd | Transport & logistics | 2024 |
| THE Cator Court Management Company Limited | Households | 2013 |
| THE Cocktail Party Group Limited | Hospitality | 2021 |
| THE Collaborative Action Network Limited | Professional & scientific | 2018 |
| THE Community Sketch Club CIC | Public administration | 2024 |
| THE Creative Career Partnership Limited | Administrative & support | 1998 |
| THE Curation Collective Ltd | Other services | 2020 |
| THE Cute and the Curious Printers Co. Ltd. | Manufacturing | 2021 |
| THE DM Collection Limited | Administrative & support | 2015 |