| Teleconnect Ltd | Information & communication | 2025 |
| Telemart Limited | Wholesale & retail | 2021 |
| Telemartuk Ltd | Wholesale & retail | 2024 |
| Telepro Global Partners Ltd | Professional & scientific | 2025 |
| Telescope Security Group Ltd | Administrative & support | 2025 |
| Telesis IT Services Limited | Information & communication | 2014 |
| Telido Consulting Ltd | Information & communication | 2016 |
| Temelo Limited | Construction | 2025 |
| Temmy Ventures Foods Ltd | Hospitality | 2026 |
| Templar Property Development Ltd | Real estate | 2025 |
| Templar Red Limited | Transport & logistics | 2021 |
| Templehill Autos Ltd | Wholesale & retail | 2023 |
| Tempus (Atherton) Ltd | Construction | 2024 |
| Tempus (Pennington) Ltd | Construction | 2024 |
| Tempus AIM Limited | Real estate | 2021 |
| Tempus Broseley Ltd | Construction | 2025 |
| Tempus Counselling Ltd | Health & social care | 2022 |
| Tempus Design & Build Ltd | Construction | 2009 |
| Tempus Development Consultancy Limited | Construction | 2016 |
| Tempus GIN Limited | Manufacturing | 2017 |
| Tempus Recruitment Limited | Extraterritorial | 2009 |
| Tempus Training Limited | Education | 2005 |
| Tenant Mate Ltd | Construction | 2024 |
| Tengu Solutions Ltd | Information & communication | 2022 |
| Tengueri Services Ltd | Health & social care | 2024 |
| Tenko Ltd | Real estate | 2023 |
| Tennissupermovers Ltd | Education | 2020 |
| Tennyson Holdings Limited | Professional & scientific | 2024 |
| Tent Valeting Services Limited | Manufacturing | 1983 |
| Terence Anderson Limited | Professional & scientific | 2017 |
| Terence Armstrong Surveyors Ltd | Professional & scientific | 2018 |
| Terminus Ltd | Information & communication | 2012 |
| TERRA365 Ltd. | Wholesale & retail | 2025 |
| Terrabuild Group Ltd | Construction | 2022 |
| Terrahaven Realty Ltd | Real estate | 2024 |
| Terrasphere Technologies Limited | Professional & scientific | 2025 |
| Terreta. Ltd | Professional & scientific | 2020 |
| Terry Barrow Agencies Ltd | Wholesale & retail | 2010 |
| Terrypan Limited | Information & communication | 2016 |
| Tesh Investments Ltd | Real estate | 2021 |
| Tesh P Ltd | Real estate | 2020 |
| Tesoro Hospitality Group Ltd | Hospitality | 2025 |
| Tesoro Pizza Limited | Hospitality | 2021 |
| Testek Ltd | Information & communication | 2010 |
| Tetlow (HC) Limited | Financial services | 2022 |
| Tetlow (PC) Limited | Real estate | 2022 |
| Tetlow (PM) Limited | Real estate | 2022 |
| Tetra Medicare Ltd | Health & social care | 2021 |
| Tetra Properties Ltd | Real estate | 2021 |
| Tetra Staffing Ltd | Administrative & support | 2022 |
| Tetracam Ltd | Manufacturing | 2020 |
| Texas Steakhouse (Chorley) Ltd | Hospitality | 2022 |
| Texmex Bolton Limited | Other services | 2014 |
| Textile 300 Ltd | Wholesale & retail | 2018 |
| Textile Solutions Professional Ltd | Manufacturing | 2007 |
| Textilo Ltd | Wholesale & retail | 2021 |
| Tezzapp Media Technologies Ltd | Information & communication | 2019 |
| TF Capital Limited | Financial services | 2013 |
| TF Medical Ltd | Health & social care | 2019 |
| Tfip Limited | Health & social care | 2020 |
| TFS Logistics Solutions Ltd | Transport & logistics | 2026 |
| Tfsa Wind Limited | Construction | 2026 |
| TGC Ecology Ltd | Professional & scientific | 2026 |
| TGG Property Group Limited | Households | 2022 |
| TGL Dynamics Limited | Information & communication | 2022 |
| TGR NDT Ltd | Professional & scientific | 2022 |
| TGR Trans Ltd | Transport & logistics | 2019 |
| TGS Tree Care Ltd | Administrative & support | 2026 |
| TGT Limited | Administrative & support | 2018 |
| TH Energy Asessors Ltd | Professional & scientific | 2025 |
| Thai Food Supermarket Limited | Wholesale & retail | 2018 |
| Thai Original House Ltd | Wholesale & retail | 2026 |
| Thai Original Restaurant Delivery Limited | Hospitality | 2024 |
| Thai Original Restaurant Limited | Hospitality | 2024 |
| Thamesmead EYE Care Ltd | Wholesale & retail | 2021 |
| Thando Works Limited | Professional & scientific | 2024 |
| Thanet Home Care Ltd | Health & social care | 2025 |
| Thanos Holdings Ltd | Financial services | 2025 |
| That Car Place Limited | Wholesale & retail | 2023 |
| That Cat Flap Company Ltd | Construction | 2020 |
| That Dog Flap Company Ltd | Construction | 2021 |
| Thata Ltd | Wholesale & retail | 2024 |
| Thathi Estates Limited | Real estate | 2025 |
| THB3 Holdings Ltd | Administrative & support | 2024 |
| THC Mentoring Ltd | Information & communication | 2023 |
| Thdd Ltd | Manufacturing | 2022 |
| Thdh 2025 Limited | Financial services | 2025 |
| THE 1ZERO84 Business Ltd | Wholesale & retail | 2023 |
| THE 3 Gals Healthcare Ltd | Health & social care | 2018 |
| THE 3RD Rock Holdings Limited | Financial services | 2018 |
| THE Abel Candle Company Ltd | Manufacturing | 2022 |
| THE Acai HUT Ltd | Wholesale & retail | 2023 |
| THE AD Shack Ltd | Arts & recreation | 2011 |
| THE Aesthetic Advisor Limited | Health & social care | 2026 |
| THE AI Detective Ltd | Education | 2024 |
| THE Aims Service Providers Limited | Professional & scientific | 2023 |
| THE Arches Garage Limited | Wholesale & retail | 2016 |
| THE Arches MOT Centre Limited | Wholesale & retail | 2016 |
| THE Art LAB Services Limited | Information & communication | 2009 |
| THE Artisans Group Ltd | Construction | 2015 |