| T & Y Restaurant Limited | Hospitality | 2018 |
| T and G Painting & Decorating Co Limited | Construction | 2014 |
| T D Logistics International Limited | Transport & logistics | 2021 |
| T L Estates Limited | Administrative & support | 2007 |
| T Leonard GAS & Plumbing Limited | Construction | 2019 |
| T&B Property Investment Ltd | Real estate | 2022 |
| T&J Carpentry Ltd | Manufacturing | 2022 |
| T&M Mechanical Services Ltd | Other services | 2018 |
| T&S Mgmnt Ltd | Professional & scientific | 2025 |
| T-Flex Ltd | Construction | 2014 |
| T-Sebi Services Ltd | Construction | 2021 |
| T. Boggis (Decorators) Limited | Construction | 2011 |
| T.E.B. (Builders) Limited | Construction | 1973 |
| T.E.J. Domestic Appliances Limited | Wholesale & retail | 1984 |
| T.K. Interiors Limited | Construction | 2014 |
| T.O.T.I.E Ltd | Wholesale & retail | 2020 |
| T3B Engineering Limited | Wholesale & retail | 2025 |
| TAB Tyres Ltd | Wholesale & retail | 2021 |
| Tabard UK Limited | Wholesale & retail | 2015 |
| Tade for Tomorrow Community Interest Company | Education | 2025 |
| TAG Property Solutions Ltd | Real estate | 2003 |
| TAG UK & Europe Ltd | Professional & scientific | 2024 |
| Tag’S Transport and Garage Services Ltd | Wholesale & retail | 2025 |
| Taika Engineering Ltd | Wholesale & retail | 2024 |
| Tailored Teaching Limited | Education | 2014 |
| Tajj Construction Ltd | Construction | 2024 |
| Take a Moment Away Ltd | Arts & recreation | 2025 |
| Take Shape Coaching Ltd | Education | 2022 |
| Take Your Shot Ltd | Professional & scientific | 2025 |
| Take Your Shot Media Ltd | Professional & scientific | 2025 |
| Taking Care of Your Business and Technology Supplies Limited | Wholesale & retail | 2022 |
| Talentum Leadership Advisory Limited | Professional & scientific | 2026 |
| Talking Computers Limited | Information & communication | 2004 |
| Tall Trees Residential Limited | Real estate | 2022 |
| Talman Limited | Wholesale & retail | 1983 |
| TAN Lounge Limited | Other services | 2011 |
| Tanisoft Consulting Ltd | Information & communication | 2014 |
| Tantoluwa Limited | Health & social care | 2010 |
| TAO Capital Limited | Real estate | 2023 |
| Tapkiran Ltd | Hospitality | 2025 |
| Tarella Ltd | Wholesale & retail | 2024 |
| Tariq & Co Ltd | Professional & scientific | 2012 |
| Tarishi Properties Ltd | Real estate | 2021 |
| Tash of ALL Trades Ltd | Professional & scientific | 2025 |
| Tashvi Consultants Ltd | Information & communication | 2018 |
| Taste Haven Ltd | Hospitality | 2015 |
| Taste of Veronesi Ltd | Wholesale & retail | 2023 |
| Tasty Basildon Ltd | Hospitality | 2025 |
| Tathgar Developments Ltd | Wholesale & retail | 2024 |
| Tax Zone Ltd | Professional & scientific | 2023 |
| Taxmatic Ltd | Professional & scientific | 2024 |
| Taxoria Ltd | Professional & scientific | 2024 |
| Taxtribe Ltd | Professional & scientific | 2021 |
| Taylor Cleaner Limited | Administrative & support | 2023 |
| Taylor Phipps Limited | Professional & scientific | 2022 |
| Tazwar Ltd | Transport & logistics | 2019 |
| TBOX365 Ltd | Manufacturing | 2026 |
| TBT Brewery Group Ltd | Hospitality | 2023 |
| Tcna Ltd | Construction | 2026 |
| TCR Blooms Ltd | Wholesale & retail | 2026 |
| TD Kitchens Limited | Construction | 2019 |
| TDA Strategic Services Ltd | Professional & scientific | 2026 |
| TDR Property Group Ltd | Construction | 2022 |
| TE2025 Ltd | Hospitality | 2025 |
| Tea Island at Home Limited | Hospitality | 2022 |
| Tea Island Limited | Hospitality | 2017 |
| Teach Everywhere Solutions Ltd | Administrative & support | 2014 |
| Teach Recruitment Limited | Administrative & support | 2019 |
| Teag Construction Ltd | Construction | 2020 |
| Teag Property Limited | Real estate | 2021 |
| Team LEO Ltd | Hospitality | 2025 |
| Tech Affairs & Crafts Ltd | Wholesale & retail | 2024 |
| Tech Point 22 Limited | Wholesale & retail | 2025 |
| Tech Saddi Ltd | Professional & scientific | 2024 |
| Tech Socialize Group Limited | Administrative & support | 2020 |
| Tech Tabs Limited | Wholesale & retail | 2023 |
| Techno-Fire Limited | Administrative & support | 2004 |
| Technology DEN Limited | Other services | 2008 |
| Technovate Solutions Ltd | Information & communication | 2024 |
| Techolony Limited | Information & communication | 2013 |
| Techtrus Ltd. | Information & communication | 2015 |
| TED & Dolly's Ltd | Manufacturing | 2017 |
| Teddies Preschool Ltd | Education | 2024 |
| Tedi Bear Ltd | Construction | 2016 |
| Tedin Limited | Hospitality | 2018 |
| Teeny Tott's Limited | Education | 2014 |
| Teep Taap Ltd | Wholesale & retail | 2023 |
| Teesquizite Limited | Hospitality | 2024 |
| Telco Cloud Services Limited | Information & communication | 2024 |
| Telford & Sons Ltd | Construction | 2024 |
| Telford and Sons Properties Limited | Real estate | 2025 |
| Temitope Projects Ltd | Professional & scientific | 2026 |
| Temperature Techs Ltd | Construction | 2025 |
| Temple Tennis Limited | Health & social care | 2023 |
| Tempo Air Conditioning Limited | Administrative & support | 2005 |
| TEN 66 Restaurants Limited | Hospitality | 2025 |
| TEN Sixty-Six Ltd | Real estate | 2025 |
| Tenderlooms Ltd | Wholesale & retail | 2025 |
| Tensor Human Capital Limited | Administrative & support | 2025 |
| Teoctbos Materials Ltd | Wholesale & retail | 2025 |