| Teal Security Ltd | Information & communication | 2017 |
| Team 64 Consultants Limited | Health & social care | 2016 |
| Team Electrical Services (1996) Limited | Construction | 1997 |
| Team FMQ Limited | Health & social care | 2020 |
| Team Minhas Limited | Real estate | 2023 |
| Team One 2025 Ltd | Information & communication | 2025 |
| Team Rehab UK Limited | Health & social care | 2015 |
| Team Shoe-Box Limited | Arts & recreation | 2019 |
| Team Shoebox Academy C.I.C. | Arts & recreation | 2024 |
| Team Stockdale Limited | Arts & recreation | 2023 |
| Team Two 2025 Ltd | Manufacturing | 2025 |
| Teamscapes Limited | Professional & scientific | 2010 |
| Tech Cargo UK Limited | Transport & logistics | 1990 |
| Tech Source I.T Solutions Ltd | Administrative & support | 2009 |
| Tech Source I.T. Holdings Limited | Financial services | 2024 |
| Tech Tree Morrison Ltd | Wholesale & retail | 2026 |
| Tech Value Limited | Wholesale & retail | 2025 |
| Techarbour Ltd | Information & communication | 2021 |
| Techcru Ltd | Wholesale & retail | 2022 |
| Techdude Ltd | Professional & scientific | 2022 |
| Techfan Ltd | Wholesale & retail | 2014 |
| Techguardix Limited | Wholesale & retail | 2025 |
| Techhorizon Global Projects Ltd | Information & communication | 2024 |
| Techiguys Ltd | Wholesale & retail | 2025 |
| Techloof Ltd | Information & communication | 2026 |
| Techman International Limited | Information & communication | 2018 |
| Techman Limited | Information & communication | 2024 |
| Technet IT Limited | Information & communication | 2026 |
| Technet Solutions 4 U Limited | Information & communication | 2016 |
| Technetcom Solutions Ltd | Information & communication | 2024 |
| TECHNIC8 Ltd | Information & communication | 2018 |
| Technical Competence Ltd | Professional & scientific | 2016 |
| Technical Fastening Solutions Ltd | Manufacturing | 2022 |
| Technical Heating Services (Northampton) Ltd | Construction | 2016 |
| Technical Ropes Ltd | Professional & scientific | 2015 |
| Technical Trading Limited | Wholesale & retail | 2012 |
| Techniche UK Limited | Wholesale & retail | 2014 |
| Technitool Ltd | Manufacturing | 2005 |
| Technofarm Ltd | Information & communication | 2025 |
| Techsyx Limited | Wholesale & retail | 2025 |
| Techvision Solutions Ltd | Professional & scientific | 2024 |
| Techvista Solution Ltd | Information & communication | 2020 |
| Tecnovap UK Limited | Manufacturing | 2019 |
| Teconica Ltd | Information & communication | 2017 |
| Tecstone Limited | Manufacturing | 2001 |
| Tecto Group Ltd | Administrative & support | 2012 |
| Tecto Holdings Ltd | Financial services | 2024 |
| TED the Chimney Sweep Ltd | Administrative & support | 2022 |
| TED Walker Ltd | Extraterritorial | 2016 |
| Teddy's Barber Shop Limited | Other services | 2016 |
| Teddy's Dog Care Limited | Other services | 2021 |
| Teddz LLP | | 2024 |
| Tedlec Limited | Construction | 2015 |
| Tedwyn Investments Limited | Real estate | 2015 |
| Tees Holdings Ltd | Real estate | 2023 |
| Teeton Homes Ltd | Construction | 2013 |
| Teezin Limited | Health & social care | 2018 |
| Teglas Decor Group Ltd | Construction | 2026 |
| TEK-73 Limited | Information & communication | 2016 |
| TEK7 Ltd | Professional & scientific | 2023 |
| Tekma Care Solutions Ltd | Transport & logistics | 2023 |
| Telecuris Solutions Ltd | Information & communication | 2020 |
| Telet Services Ltd | Information & communication | 2012 |
| Telford Tanks Limited | Professional & scientific | 2000 |
| Teliuc Ltd | Transport & logistics | 2016 |
| Tellica Investments Ltd | Real estate | 2016 |
| Telmar Consultancy Services Ltd | Information & communication | 2015 |
| Telnet Holdings Limited | Financial services | 2026 |
| Telor Ltd. | Information & communication | 2020 |
| Telos Farming Ltd | Agriculture & fishing | 2025 |
| Telos Hoofcare Ltd | Wholesale & retail | 2024 |
| Telos Livery Ltd | Arts & recreation | 2025 |
| Teltronix Holdings Ltd | Financial services | 2020 |
| Teltronix Limited | Manufacturing | 2021 |
| Teltronix U.K. Limited | Manufacturing | 2020 |
| Tema Industries Limited | Manufacturing | 2013 |
| Tempeo Group Holdings Limited | Administrative & support | 2024 |
| Tempeo Limited | Administrative & support | 2024 |
| Tempeo PAY Limited | Administrative & support | 2024 |
| Temper! (Domestic Violence) | Health & social care | 1999 |
| Tempestas Capital Limited | Administrative & support | 2019 |
| Tempestas Global Ltd | Administrative & support | 2024 |
| Tempestas Holdings Limited | Financial services | 2020 |
| Temple Construction Recruitment Ltd | Administrative & support | 2024 |
| Temple North Management Ltd | Financial services | 2016 |
| Temple Vapes Ltd | Wholesale & retail | 2018 |
| Templeman Family and Company Ltd | Administrative & support | 2024 |
| TEN24 IT Services Ltd | Information & communication | 2021 |
| Tenamis Limited | Financial services | 2020 |
| Tenaura Homes Ltd | Real estate | 2025 |
| Tenderlink Ltd | Health & social care | 2023 |
| Tendolove Homecare Limited | Extraterritorial | 2022 |
| Tenerifestars Limited | Construction | 2025 |
| Tenet Legal and Technology Services Ltd | Information & communication | 2025 |
| Tenmonkeys Limited | Information & communication | 2010 |
| Tennessee Trucking Ltd | Transport & logistics | 2024 |
| Tennin Ltd | Wholesale & retail | 2018 |
| Tennis Rockets Limited | Education | 2019 |
| Tennyson Close 1957 Limited | Extraterritorial | 2014 |
| Tenovici Ltd | Transport & logistics | 2023 |