| Top Marks Development Limited | Information & communication | 2019 |
| Topaz Retail Ltd | Wholesale & retail | 2020 |
| Topchefburton Ltd | Hospitality | 2021 |
| Torus Emission Solutions Limited | Wholesale & retail | 2023 |
| Total Development (Midlands) Limited | Construction | 2026 |
| Total Event Management Ltd | Hospitality | 2025 |
| Total Heating Maintenance Ltd | Construction | 2019 |
| Totality Recruitment Ltd | Administrative & support | 2025 |
| Totally Scalloped Ltd | Hospitality | 2026 |
| Touchconstellations Limited | Education | 2022 |
| Tower Brewery Limited | Manufacturing | 2006 |
| Town & County Services Limited | Other services | 2008 |
| TPG Logistics Limited | Transport & logistics | 2017 |
| TQ Car Sales Ltd | Wholesale & retail | 2024 |
| Trac-Pro Limited | Administrative & support | 2022 |
| Tracca Limited | Information & communication | 2013 |
| Tractic Limited | Information & communication | 2020 |
| Trade Centres Signature Limited | Wholesale & retail | 2018 |
| Trade Data Ltd | Information & communication | 2012 |
| Trailer Sales UK Ltd | Wholesale & retail | 2025 |
| Trails & Tales Collective C.I.C. | Education | 2026 |
| Trans Empire Limited | Transport & logistics | 2021 |
| Trans-World Solutions Limited | Extraterritorial | 1998 |
| Transalliance TS Limited | Transport & logistics | 1998 |
| Transdut Limited | Transport & logistics | 2025 |
| Transhaven RS Ltd | Construction | 2019 |
| Transportget Ltd | Transport & logistics | 2018 |
| Transtruck Ltd | Transport & logistics | 2019 |
| Transylvania Services Ltd | Transport & logistics | 2017 |
| Trapido Limited | Extraterritorial | 2015 |
| Travel 4 Limited | Administrative & support | 2025 |
| Trees Properties Ltd | Real estate | 2022 |
| Trenbane Investments Ltd | Real estate | 2025 |
| Trendstek Ltd | Wholesale & retail | 2026 |
| Trendztrove Limited | Wholesale & retail | 2024 |
| Trent & Derwent Electrical Services Ltd | Construction | 2013 |
| Trent Construction Services Limited | Construction | 2012 |
| Trent Fire Solutions Limited | Public administration | 2025 |
| Trent Flooring Solutions Limited | Wholesale & retail | 2013 |
| Trent Furnishing Co.Limited | Wholesale & retail | 1967 |
| Trent GAS Solutions Ltd | Construction | 2021 |
| Trent Innovation Limited | Professional & scientific | 2024 |
| Trently ASH Ltd. | Real estate | 2024 |
| Trenton Fire Limited | Construction | 2007 |
| Trentside Property Co (Burton) Limited | Construction | 1982 |
| Trevor Demon Ltd | Wholesale & retail | 2025 |
| Trew Consultants Ltd | Professional & scientific | 2024 |
| Tri-Build Ltd | Construction | 2009 |
| Trial Systems Limited | Information & communication | 1986 |
| Triangle Heart Ltd | Information & communication | 2025 |
| Triley Bidco Limited | Professional & scientific | 2021 |
| Triley Midco 2 Limited | Financial services | 2022 |
| Triley Midco Limited | Professional & scientific | 2021 |
| Trinity Housing Developments Limited | Construction | 2019 |
| Triosss Foods Ltd | Hospitality | 2026 |
| Tropical Beach Ltd | Hospitality | 2025 |
| TRU Solutions BOT Limited | Information & communication | 2016 |
| Truform Consultants Ltd | Administrative & support | 2022 |
| Trust IT Management Ltd | Information & communication | 2016 |
| Trustanelectrician.Com Ltd | Construction | 2011 |
| Truste Services Limited | Professional & scientific | 2006 |
| Trusted Care Services Group Limited | Health & social care | 2023 |
| Trustone Builders Limited | Construction | 2002 |
| TRUX4ALL Limited | Administrative & support | 2009 |
| Trym Property Limited | Hospitality | 2009 |
| Tsar Holdings Limited | Financial services | 2018 |
| Tsmithcare Ltd | Health & social care | 2019 |
| TSR 2 Limited | Extraterritorial | 2005 |
| TSRV1 Ltd | Hospitality | 2024 |
| TTT Logistics Limited | Transport & logistics | 2017 |
| Tudor Grange Investments Ltd | Real estate | 2000 |
| Tulip House Burton Ltd | Health & social care | 2020 |
| Tulip Trading Ltd | Real estate | 2008 |
| Tumopa Limited | Construction | 2016 |
| Tuntex Commercial UK Ltd | Administrative & support | 2011 |
| Turner & Co. (Consulting) Limited | Professional & scientific | 2009 |
| Turner Sports Limited | Wholesale & retail | 2013 |
| Turret Care Limited | Health & social care | 2025 |
| Turrini Ltd | Information & communication | 2014 |
| Tutbury Carpets Ltd | Wholesale & retail | 2022 |
| Tutbury Homes and Gardens Ltd | Construction | 2020 |
| Tutbury Present Company Limited | Wholesale & retail | 2009 |
| TW Empire Ltd | Construction | 2018 |
| Tw&Tf Ltd | Wholesale & retail | 2025 |
| Twhau Ltd | Hospitality | 2024 |
| Twisted Frog Ltd | Wholesale & retail | 2014 |
| Two Oceans Limited | Hospitality | 2020 |
| Twyford Complex Limited | Arts & recreation | 2014 |
| Tylo Engineering Limited | Administrative & support | 2017 |
| U & H Real Estate Ltd | Real estate | 2018 |
| U Mart Limited | Wholesale & retail | 2021 |
| U&H Couriers Ltd | Transport & logistics | 2024 |
| UK Apex Core Limited | Wholesale & retail | 2026 |
| UK Development Limited | Real estate | 2025 |
| UK Drainage Limited | Water & waste | 2007 |
| UK Local Shop Ltd | Wholesale & retail | 2024 |
| UK PAK Property Ltd | Real estate | 2024 |
| UK Rejoin the EU Ltd | Other services | 2022 |
| UK Tramping Recruitment Limited | Transport & logistics | 2025 |
| Ulltrapure Ltd | Professional & scientific | 2011 |