| Tara Dynamic Ltd | Wholesale & retail | 2024 |
| Tara Evans Media Limited | Information & communication | 2026 |
| Taranheights Limited | Real estate | 1985 |
| Tarkine Ltd | Construction | 2026 |
| Tarkine Property Ltd | Real estate | 2026 |
| Tarshish Ltd | Real estate | 2017 |
| Taryag Ltd | Education | 2025 |
| Tasca Ventures Ltd | Information & communication | 2025 |
| Tash Arash Ltd | Real estate | 2025 |
| Tashbar Academy Ltd | Education | 2010 |
| Taslim Properties Ltd | Households | 2024 |
| Tasty Buds Take Away Ltd | Hospitality | 2025 |
| Tasty Kosher Limited | Wholesale & retail | 2020 |
| Tastykitchensalford Ltd | Hospitality | 2023 |
| Tatis Delicious Ltd | Hospitality | 2025 |
| Tattenhoe Park SPV Limited | Real estate | 2025 |
| Tattoo Removal UK Ltd | Health & social care | 2026 |
| Tattoos at TOB Ltd | Other services | 2025 |
| Taub Properties Ltd | Real estate | 2025 |
| Tax Wizzards Ltd | Professional & scientific | 2022 |
| Taylor & Finch Ltd | Wholesale & retail | 2018 |
| Taylor Street Estates Ltd | Real estate | 2023 |
| Taylor'D Floorings & Carpets Ltd | Construction | 2017 |
| TBC Estates Ltd | Real estate | 2023 |
| Tbgr Limited | Other services | 2025 |
| TBM Holdings Ltd | Other services | 2019 |
| TC Quality Ltd | Professional & scientific | 2023 |
| Tcal Holdings Ltd | Wholesale & retail | 2020 |
| TCC Broadcasting Limited | Information & communication | 2017 |
| TCH CX Limited | Administrative & support | 2025 |
| TCH Global Ltd | Administrative & support | 2025 |
| Tcla Media Ltd | Information & communication | 2025 |
| TCN Ltd | Information & communication | 2005 |
| Tcrecords Limited | Arts & recreation | 2019 |
| TDD Estates Ltd | Real estate | 2008 |
| TDG Entertainments Ltd | Arts & recreation | 2026 |
| TE Estates Ltd | Real estate | 2023 |
| Tea Delight UK Ltd | Extraterritorial | 2024 |
| Teachmeplab Ltd | Education | 2022 |
| Teai Ltd | Wholesale & retail | 2025 |
| Teak Commercial Limited | Extraterritorial | 2019 |
| Teal Compliance Limited | Professional & scientific | 2018 |
| Teal Consultancy Limited | Professional & scientific | 2013 |
| Team Consulting International (UK) Limited | Administrative & support | 2012 |
| Team Offshore Ltd | Professional & scientific | 2018 |
| Team Tidy Cleaning Ltd | Administrative & support | 2024 |
| Team Valley Securities 2 Limited | Real estate | 2020 |
| Team Valley Securities Limited | Real estate | 2020 |
| Teammeli Ltd | Health & social care | 2023 |
| Teamone Solutions Ltd | Administrative & support | 2025 |
| Tean Valley View Management Company Limited | Households | 2024 |
| Tebo 1111 Ltd | Other services | 2025 |
| Tech Cheaper Limited | Manufacturing | 2022 |
| Tech Edge Enterprises Ltd | Wholesale & retail | 2019 |
| Tech FIX SC Ltd | Wholesale & retail | 2024 |
| Tech Universe Ltd | Wholesale & retail | 2020 |
| Techcein Ltd | Professional & scientific | 2023 |
| Techfutures Limited | Administrative & support | 2006 |
| Technical Professionals Limited | Administrative & support | 2007 |
| Technique Art Construction Ltd | Construction | 2025 |
| Technique Art Maintenance Ltd | Construction | 2025 |
| Technoland Ltd | Information & communication | 2025 |
| Technolinks International Limited | Information & communication | 2024 |
| Techvuze Media Ltd | Information & communication | 2025 |
| Tecnation Ltd | Information & communication | 2025 |
| Tectonic OEM Limited | Wholesale & retail | 2019 |
| Teddy Care MCR Ltd | Health & social care | 2026 |
| Ted’S Crazy Golf (London) Limited | Arts & recreation | 2026 |
| TEE Beauty World Ltd | Other services | 2025 |
| TEE Lowe Logistics Ltd | Transport & logistics | 2026 |
| Teesdale Property Company (3) Limited | Other services | 2005 |
| Teeth Brightening Limited | Other services | 2025 |
| Tehq Limited | Wholesale & retail | 2023 |
| Tehran City Limited | Wholesale & retail | 2025 |
| Teisan Limited | Professional & scientific | 2013 |
| Teixeira Logistics Ltd | Transport & logistics | 2019 |
| Teknologie Solutions Limited | Professional & scientific | 2023 |
| TEL Investments Ltd | Real estate | 2019 |
| TEL One Investment Ltd | Real estate | 2020 |
| Telco Global Limited | Information & communication | 2001 |
| Telco Holdings Limited | Information & communication | 2001 |
| Telesign Mobile Limited | Information & communication | 2002 |
| Teligram Limited | Information & communication | 2021 |
| Tella Group. Ltd | Professional & scientific | 2025 |
| Tellar Holdings EOT Trustees Limited | Financial services | 2021 |
| Teltonika United Kingdom Ltd | Wholesale & retail | 2023 |
| Temaro Limited | Professional & scientific | 2024 |
| Temple Drive Garages Limited | Households | 1987 |
| Temple Securities 2 Limited | Real estate | 2021 |
| Temple Securities Limited | Real estate | 2021 |
| Templebase Limited | Manufacturing | 2011 |
| TEN Property Group Ltd | Financial services | 2024 |
| Tenancy Hive Limited | Information & communication | 2021 |
| Tenant Protect Limited | Administrative & support | 2010 |
| Tendon Limited | Energy | 2023 |
| Tenet Education Services Limited | Professional & scientific | 1995 |
| Tengates (Aspull) Limited | Extraterritorial | 2022 |
| Tenterbury Investments Limited | Real estate | 2024 |
| Tenway Corporate Ltd | Extraterritorial | 2015 |
| Terahost Ltd | Information & communication | 2015 |