| Truly Clothing Limited | Wholesale & retail | 2022 |
| Truly Restaurants Limited | Hospitality | 2022 |
| Trusbauch Ltd | Administrative & support | 2024 |
| Trusshire Ltd | Administrative & support | 2025 |
| Trussonline Ltd | Manufacturing | 2023 |
| Trusswarehouse Ltd | Administrative & support | 2025 |
| Trust Hygiene Services (East) Limited | Professional & scientific | 2006 |
| Trust Hygiene Services Limited | Water & waste | 2002 |
| Trust Property Cleaning Services Limited | Extraterritorial | 2013 |
| Trusted AI Governance Ltd | Information & communication | 2010 |
| Trustworthy Solutions Limited | Information & communication | 2007 |
| Truth Law Consultants Limited | Real estate | 2020 |
| Truwrld Studios Ltd | Information & communication | 2025 |
| TRW Engineering Services Ltd | Manufacturing | 2017 |
| TRZ Vehicle Solutions Ltd | Administrative & support | 2023 |
| TS & D Services Limited | Transport & logistics | 2016 |
| TS Couriers Ltd | Transport & logistics | 2021 |
| TSA Retail Limited | Wholesale & retail | 2020 |
| Tsalach Care Limited | Health & social care | 2022 |
| TSG Seshego Ltd | Health & social care | 2021 |
| Tshongogwe Ltd | Health & social care | 2017 |
| Tshree Ltd | Real estate | 2019 |
| TSI Petro Engineering Ltd | Wholesale & retail | 2026 |
| TSL Deliveries UK Ltd | Transport & logistics | 2025 |
| TSR Pharma Limited | Wholesale & retail | 2026 |
| Tst-Tamsan UK Limited | Wholesale & retail | 2005 |
| TT Aerial Productions Limited | Construction | 2003 |
| TT Partners Ltd | Health & social care | 2018 |
| TT Safe GAS Limited | Construction | 2024 |
| TT Sports Apparel Limited | Education | 2026 |
| TT Tradesmen Limited | Construction | 2023 |
| TTG Pharm Ltd. | Wholesale & retail | 2025 |
| TTH Properties Ltd | Real estate | 2025 |
| Ttip Consulting Ltd | Professional & scientific | 2018 |
| TU Transport Limited | Transport & logistics | 2024 |
| Tube Bend Form Holdings Ltd | Administrative & support | 2024 |
| Tube Bend Form International Ltd | Administrative & support | 2010 |
| TUC Ltd | Other services | 2021 |
| Tuchless Cosmetics Ltd | Manufacturing | 2026 |
| Tudor Construction (West Midlands) Ltd | Construction | 2010 |
| Tudor Employment Agency Limited | Administrative & support | 1988 |
| Tudor Employment Ltd | Administrative & support | 2011 |
| Tudor Hope Healthcare Limited | Extraterritorial | 2025 |
| Tudor Rose Tattoo Studio Ltd | Other services | 2019 |
| Tudorworld Limited | Wholesale & retail | 2017 |
| Tulip Education Limited | Education | 2011 |
| Tully IT Limited | Professional & scientific | 2018 |
| Tumble Town Soft Play Ltd | Arts & recreation | 2023 |
| Tumeric N Glow CIC | Other services | 2025 |
| Tunneline Limited | Construction | 2003 |
| Tunstall Roofing and Cladding Ltd | Construction | 2019 |
| Turbomiser Limited | Extraterritorial | 2010 |
| Turbotech Auto Ltd | Wholesale & retail | 2025 |
| Turf Experts Ltd | Wholesale & retail | 2020 |
| Turkish Barbers Bloxwich Ltd | Other services | 2022 |
| Turkish Barbers by ALI Ltd | Other services | 2023 |
| Turkish Barbers by ALI1 Ltd | Other services | 2025 |
| Turkish Kabab House Ltd | Hospitality | 2023 |
| Turkish Shawarma Ltd | Hospitality | 2017 |
| Turkish Style WR Ltd | Other services | 2024 |
| Turleys Electrical Limited | Construction | 2006 |
| Turnberry Floors Ltd | Construction | 2026 |
| Turnberry House Unisex Tanning & Beauty Ltd | Other services | 2005 |
| Turnberry Plumbing and Heating Ltd | Construction | 2018 |
| Turnbull Estates Ltd | Real estate | 2023 |
| Turner Richards Limited | Manufacturing | 2005 |
| Turner's (West Bromwich) Limited | Real estate | 1957 |
| Turnkey Autos Ltd | Wholesale & retail | 2024 |
| Turnstone Plastering Ltd | Construction | 2026 |
| Tuscan T&D Limited | Professional & scientific | 2003 |
| Tusha Car Valeting Ltd | Other services | 2021 |
| TUT Group Ltd | Professional & scientific | 2019 |
| TVC Retrofit Ltd | Wholesale & retail | 2023 |
| Tvsp Punjabi Ltd | Manufacturing | 2025 |
| TWC Property Investments Limited | Real estate | 2022 |
| TWENTY06 Limited | Arts & recreation | 2018 |
| Twidale Enterprise Ltd | Hospitality | 2022 |
| Twilight Corporation Ltd | Administrative & support | 2025 |
| Twin Design Limited | Professional & scientific | 2007 |
| Twinehaz Ltd | Administrative & support | 2024 |
| Twinnedit Limited | Information & communication | 2025 |
| Twinsane Fitness C.I.C. | Other services | 2021 |
| Twisted Tokyo Ltd | Administrative & support | 2022 |
| Twistique Limited | Wholesale & retail | 2025 |
| Twistv Ltd | Transport & logistics | 2023 |
| Two Birds Care Ltd | Public administration | 2025 |
| Two Brains Ltd | Wholesale & retail | 2025 |
| Two Degrees West Technology Ltd | Extraterritorial | 2015 |
| Two G'S Solutions Ltd | Other services | 2023 |
| Two Guys Group Holdings Ltd | Wholesale & retail | 2025 |
| Two Toms Bars and Hospitality Ltd | Hospitality | 2026 |
| TY Freight Ltd | Transport & logistics | 2025 |
| Tyann Clothes Label Shop Limited | Wholesale & retail | 2026 |
| Tylah Health & Wellness Ltd | Education | 2023 |
| Tyler Brown Art Publishing Ltd | Arts & recreation | 2022 |
| Tyndall Auto Limited | Wholesale & retail | 2025 |
| TYR Property Group Ltd | Real estate | 2025 |
| Tyre Base Auto Centre Ltd | Wholesale & retail | 2020 |
| Tyre City Autocentre Ltd | Wholesale & retail | 2022 |
| Tyre Traders Walsall Ltd | Wholesale & retail | 2025 |