| Tabia's Touch Limited | Other services | 2020 |
| TAC Security Limited | Administrative & support | 2012 |
| Tacconi Consulting Ltd | Manufacturing | 2025 |
| Tackling Stigma Ltd | Professional & scientific | 2021 |
| Tacug Ltd | Information & communication | 2024 |
| Tadas Carpentry Ltd | Construction | 2025 |
| Tafadzwa Health Innovations Limited | Professional & scientific | 2025 |
| Tagarec Ltd | Construction | 2015 |
| TAJ Gill Properties Limited | Real estate | 2023 |
| TAJ Supermarket Limited | Wholesale & retail | 2017 |
| Tajacla Limited | Health & social care | 2020 |
| Takechipandpin.Com Limited | Wholesale & retail | 2024 |
| Talent and Skills Hub Limited | Education | 2022 |
| Talent Beacon Ltd | Manufacturing | 2024 |
| Talent Flow Partners Limited | Administrative & support | 2024 |
| Talent Sherpa Recruitment Limited | Other services | 2024 |
| Talos Consultancy Ltd | Professional & scientific | 2025 |
| Tamaya Services Ltd. | Professional & scientific | 2015 |
| Tambor Fleet Solutions Ltd | Administrative & support | 2021 |
| Tambor Recruitment Solutions Ltd | Administrative & support | 2021 |
| Tamco Medical Limited | Health & social care | 2016 |
| TAN & Sons Developers Ltd | Construction | 2026 |
| Tanase Trans Limited | Transport & logistics | 2022 |
| Tandem Ciclo Ltd | Hospitality | 2016 |
| Tando Capital Limited | Financial services | 2024 |
| Tangled Hair & Beauty Ltd | Other services | 2013 |
| Tapiwa Limited | Health & social care | 2012 |
| Tapton Capital Limited | Financial services | 2018 |
| Tardigg Utilities Ltd | Construction | 2020 |
| Tarf Ltd | Real estate | 2025 |
| Target Broadland Limited | Real estate | 2025 |
| Target Motor Sports Limited | Wholesale & retail | 1986 |
| Target Piracy Ltd | Administrative & support | 2019 |
| Target Riverside Limited | Real estate | 2022 |
| Target Security Services Ltd | Administrative & support | 2020 |
| Target Waterside Limited | Real estate | 2024 |
| Targit Ltd | Extraterritorial | 2017 |
| TAS Whitmore Way Ltd | Wholesale & retail | 2025 |
| Task Heating Soloutions Ltd | Construction | 2026 |
| Taskers Motor Company Limited | Wholesale & retail | 2020 |
| Taskers Transport Ltd | Transport & logistics | 2020 |
| Tassels 360 Ltd | Arts & recreation | 2025 |
| Taste of Italy Limited | Wholesale & retail | 2020 |
| Taste the East Ltd | Hospitality | 2026 |
| Tastea Food Ltd | Hospitality | 2022 |
| Tasty Mart Ltd | Wholesale & retail | 2024 |
| Tatla Ltd | Wholesale & retail | 2023 |
| Tatu Transport Ltd | Transport & logistics | 2022 |
| Taurus Solutions Ltd | Information & communication | 2018 |
| Tavistock Construction Limited | Construction | 2004 |
| Tavistock Plant Ltd | Extraterritorial | 2014 |
| Tax Bridge UK Ltd | Information & communication | 2026 |
| Taxtime Advisors Ltd | Professional & scientific | 2024 |
| Taylor and Lyle Limited | Administrative & support | 2025 |
| Taylor Baines Limited | Administrative & support | 2010 |
| Taylormade Group Holdings Limited | Construction | 2018 |
| Taylormade Mechanical & Electrical Services Limited | Construction | 2009 |
| TB Interiors Ltd | Construction | 2023 |
| Tben Health Care Services Limited | Health & social care | 2023 |
| TBR Salons Ltd | Other services | 2014 |
| TC Marine Ltd | Manufacturing | 2023 |
| TC Trading Limited | Wholesale & retail | 2024 |
| TCA Construction Ltd | Construction | 2025 |
| TCE 2007 Limited | Administrative & support | 2015 |
| TCH Automotive Limited | Wholesale & retail | 2020 |
| TCS Total Cleaning Services Ltd | Other services | 2018 |
| TD Kostov 3 Ltd | Transport & logistics | 2025 |
| TD Leonard Services Limited | Manufacturing | 2026 |
| Tdsc Ltd | Professional & scientific | 2022 |
| Teallach Partners Limited | Professional & scientific | 2017 |
| Team Auto Sales Ltd | Wholesale & retail | 2023 |
| Team Glam Ltd | Other services | 2015 |
| Team Office Supplies Limited | Wholesale & retail | 2016 |
| Team UK Solutions Limited | Financial services | 2022 |
| Teamwork Care Services Limited | Health & social care | 2013 |
| TEC Global Solutions Limited | Manufacturing | 2015 |
| TEC Global UK Limited | Information & communication | 2022 |
| Tech Maintenance Ltd | Information & communication | 2019 |
| Techbase Basildon Limited | Wholesale & retail | 2025 |
| Techlitix Ltd | Wholesale & retail | 2019 |
| Techmind Recruitment Limited | Administrative & support | 2018 |
| Technical Services (London) Limited | Other services | 2019 |
| Technique Interiors Limited | Construction | 2013 |
| Technique Projects Limited | Construction | 1983 |
| Technoflex Ltd | Information & communication | 2026 |
| Techpos Asset Limited | Administrative & support | 2016 |
| Tecosim Limited | Professional & scientific | 1999 |
| Teddy’S Tree Services Limited | Agriculture & fishing | 2025 |
| Teds Wheels and Refurbishment Ltd | Wholesale & retail | 2026 |
| Teefah’S Limited | Health & social care | 2022 |
| Teekay’S World Limited | Wholesale & retail | 2026 |
| Teenie Rockets Limited | Health & social care | 2022 |
| Teesman Limited | Health & social care | 2023 |
| Tegaa Ltd | Professional & scientific | 2025 |
| TEI Industrial Services Limited | Manufacturing | 2025 |
| Teizar Limited | Wholesale & retail | 2023 |
| TEK Alliance Group Ltd | Information & communication | 2020 |
| Tekna Catering Ltd | Hospitality | 2025 |
| Tekna Electrical Ltd | Construction | 2018 |
| Tekna Holdings Limited | Financial services | 2026 |