| TAG Metals Limited | Water & waste | 2002 |
| Taggar Investments Ltd | Real estate | 2022 |
| Tailfin Finance Limited | Financial services | 2011 |
| Takeover World Limited | Wholesale & retail | 2022 |
| Talbot FS Ltd | Financial services | 2018 |
| Talitha Christine Ltd | Manufacturing | 2024 |
| Talk Therapy Birmingham Limited | Other services | 2020 |
| Tallon Limited | Hospitality | 2026 |
| Talon Management Limited | Administrative & support | 1992 |
| Tambak Capitol Limited | Construction | 2016 |
| Tambak Group Limited | Construction | 2018 |
| Tambak Holdings Ltd | Financial services | 2024 |
| Tambak Limited | Construction | 2016 |
| Tame Grounds Maintenance Limited | Administrative & support | 2015 |
| Tame Homes (Dosthill) Limited | Construction | 2021 |
| Tame Homes (Penkridge) Limited | Construction | 2023 |
| Tame Industrial Cleaning Limited | Administrative & support | 2016 |
| Tameya Fragrances Ltd | Manufacturing | 2025 |
| Tammys Wins Ltd | Arts & recreation | 2023 |
| Tampsand Holdings Ltd | Real estate | 2020 |
| Tamworth Takeaway Services Ltd | Hospitality | 2019 |
| Tanagon Limited | Health & social care | 2006 |
| Tanc Properties Limited | Real estate | 2015 |
| Tanishq Ltd | Hospitality | 2025 |
| Tann Hills Properties Limited | Real estate | 1964 |
| Tanvee Solutions Ltd | Information & communication | 2023 |
| Taome Limited | Administrative & support | 2007 |
| TAP Food Vans Limited | Hospitality | 2022 |
| Target PR Limited | Administrative & support | 2008 |
| Tassama's Treasure's Ltd | Wholesale & retail | 2023 |
| Taste E M Ltd | Arts & recreation | 2020 |
| Tasteful Pubs and Inns Limited | Hospitality | 2003 |
| Tasty Bake Limited | Manufacturing | 1982 |
| Tasty Pizza Ltd | Hospitality | 2022 |
| Tath Ltd | Real estate | 2020 |
| Tattooed Trainer Ltd | Other services | 2025 |
| Taurus Consulting Group Ltd | Professional & scientific | 2020 |
| Tavern Investments LLP | | 2010 |
| Taxx Limited | Professional & scientific | 1997 |
| Taylor Squared Ltd | Professional & scientific | 2012 |
| Taylor Trading Systems Holdings Ltd | Financial services | 2025 |
| Taylor Trading Systems Limited | Wholesale & retail | 2009 |
| Taylorcare (Coventry) Limited | Professional & scientific | 2019 |
| Taylorcare (East Midlands) Ltd | Administrative & support | 2025 |
| Taylorcare Limited | Administrative & support | 2014 |
| Taylors Deliveries Limited | Transport & logistics | 2025 |
| Taylors Funerals (Wirral) Limited | Extraterritorial | 1958 |
| Taylors Property's Services Ltd | Construction | 2024 |
| TB 01 Limited | Construction | 2016 |
| TB 02 Limited | Construction | 2016 |
| TB Education Group Ltd | Education | 2024 |
| TB Resort Holdings UK Limited | Financial services | 2019 |
| TB Resort Operations Limited | Hospitality | 2012 |
| TBS Online Limited | Wholesale & retail | 2021 |
| TDA Computer Systems Limited | Information & communication | 2004 |
| Tealby Property Limited | Real estate | 2021 |
| Team 2 Electrical Ltd | Construction | 2022 |
| Tech Secure Group Ltd | Information & communication | 2021 |
| TECH2YOU Limited | Information & communication | 2018 |
| Techgiantonline Ltd | Information & communication | 2025 |
| Technixus Solutions Ltd | Information & communication | 2018 |
| Technoform Insulation Solutions UK Limited | Wholesale & retail | 2018 |
| Technologies 24 Limited | Information & communication | 2022 |
| Technonika UK Limited | Construction | 2025 |
| Techwava Wholesale L Ltd | Wholesale & retail | 2024 |
| Tecjec Limited | Real estate | 2024 |
| Tectevo Ltd | Administrative & support | 2019 |
| Tectonic Shift Ltd. | Information & communication | 2007 |
| Tectum Holdings Limited | Professional & scientific | 2020 |
| TED Williams of Birmingham Limited | Wholesale & retail | 1952 |
| Teeshas Health and Beauty Ltd | Other services | 2025 |
| Temperleys School of Dance Limited | Education | 2015 |
| Temple Mead Care Ltd | Health & social care | 2012 |
| Temple Mead Holdings Ltd | Financial services | 2023 |
| Temple ROW Wealth Management Ltd | Financial services | 2019 |
| Temple Skin Ltd | Wholesale & retail | 2026 |
| TEN Care & Support International Ltd | Administrative & support | 2024 |
| Tepy Construction Management Ltd | Professional & scientific | 2025 |
| Terra Engineering Limited | Construction | 2023 |
| Terra Properties One Ltd | Real estate | 2025 |
| Terrastructures Limited | Construction | 2017 |
| Tesla Group Holdings Limited | Financial services | 2025 |
| Tesla Holdings Limited | Administrative & support | 2015 |
| Tesla UK Limited | Wholesale & retail | 2007 |
| Tessera Omega Limited | Real estate | 2016 |
| Test Software Solutions Limited | Information & communication | 2012 |
| Teulu Hair Ltd | Other services | 2022 |
| Texty Technologies Ltd | Information & communication | 2026 |
| TF Midlands Limited | Hospitality | 2025 |
| TF Snacks Limited | Wholesale & retail | 2012 |
| TF Tiles Ltd | Wholesale & retail | 2023 |
| TFF Group Limited | Wholesale & retail | 2000 |
| TFP Analytics Limited | Administrative & support | 2017 |
| TFQ Limited | Professional & scientific | 2012 |
| TFSPORTS91 Limited | Health & social care | 2025 |
| That's the House Ltd | Real estate | 2024 |
| Thawait Optics Limited | Professional & scientific | 2021 |
| THB & BAX Financial Consulting Limited | Professional & scientific | 2025 |
| THD Equestrian Services Limited | Agriculture & fishing | 2015 |
| THE Aesthetics Company UK- Mere Green Ltd | Health & social care | 2022 |