| Synergy Stem Partners Limited | Administrative & support | 2024 |
| T and R News Limited | Wholesale & retail | 2025 |
| T D'Urso Limited | Professional & scientific | 2025 |
| T&S Grooming Limited | Other services | 2024 |
| T.Anwyl & SON Limited | Construction | 1947 |
| T.D. Sarmala Ltd | Transport & logistics | 2024 |
| T.M.P.H TOM Miller Plumbing & Heating Ltd | Construction | 2021 |
| TAI CHI Takeaway Limited | Hospitality | 2019 |
| Tairuzz Ltd | Information & communication | 2012 |
| Taps 'N Tubs (UK) Limited | Wholesale & retail | 2014 |
| Tatry Delicatessen Ltd | Wholesale & retail | 2014 |
| Tcgtraders Ltd | Wholesale & retail | 2026 |
| TDC Hydro Limited | Manufacturing | 1997 |
| TDN Smith Ltd | Real estate | 2018 |
| Techgadzo Ltd | Wholesale & retail | 2026 |
| Telecycle Europe Limited | Wholesale & retail | 2014 |
| TEN TEN Systems Limited | Information & communication | 2003 |
| Terrarium Direct Ltd | Wholesale & retail | 2023 |
| Thai Chilli Crispie Company Ltd | Wholesale & retail | 2023 |
| THE Anima Centre CIC | Professional & scientific | 2022 |
| THE Bargain FOX Ltd | Wholesale & retail | 2019 |
| THE Barnyard Management Company Limited | Real estate | 1987 |
| THE Beer LAB Limited | Hospitality | 2017 |
| THE Big Hedge Company Ltd | Construction | 2014 |
| THE Biscuit Bridge Ltd | Professional & scientific | 2025 |
| THE Bridal Bunny Ltd | Wholesale & retail | 2021 |
| THE Card Network Limited | Extraterritorial | 2016 |
| THE Corbett Group Limited | Professional & scientific | 2000 |
| THE Creative Bake Co Limited | Manufacturing | 2020 |
| THE Ethikos Group Ltd | Administrative & support | 2017 |
| THE Events Executive Ltd | Administrative & support | 2020 |
| THE Ferry Diner Ltd | Hospitality | 2024 |
| THE Food Warehouse Limited | Wholesale & retail | 2017 |
| THE Furnished Home Company Limited | Real estate | 1998 |
| THE Head Chef Cafe Ltd | Hospitality | 2026 |
| THE Hub Hawarden Ltd | Other services | 2019 |
| THE Little Dress Co. Ltd | Wholesale & retail | 2026 |
| THE Merchant House Limited | Wholesale & retail | 2004 |
| THE Parkgate Lumber Company Ltd | Manufacturing | 2022 |
| THE Parklands (Birmingham) Management Company Limited | Households | 1997 |
| THE Phone Shed Limited | Other services | 2016 |
| THE Powerhouse Auto Limited | Wholesale & retail | 2002 |
| THE Quay Spice Restaurant Limited | Hospitality | 2024 |
| THE Resource Factory Limited | Professional & scientific | 2006 |
| THE Restaurant Bar and Grill Limited | Hospitality | 2020 |
| THE Ritz Cafe Ltd | Hospitality | 2026 |
| THE Sacred Thread Limited | Other services | 2025 |
| THE Soup Group Ltd | Wholesale & retail | 2023 |
| THE Supply Chain Octopus Ltd | Professional & scientific | 2026 |
| THE Talent Foundry Limited | Professional & scientific | 2011 |
| THE Travel Nanny Concierge Ltd | Health & social care | 2025 |
| THE Unconventional Practice Ltd | Professional & scientific | 2026 |
| Thomas Allen Consultancy Limited | Professional & scientific | 2025 |
| Thompson Properties Cheshire Limited | Real estate | 2023 |
| Thorspeed Ltd | Transport & logistics | 2025 |
| Three Amigos Design Ltd | Arts & recreation | 2020 |
| Thrislington Cubicles Limited | Manufacturing | 1995 |
| Tidy UP Ltd | Administrative & support | 2022 |
| Tiny Panda Graphic Artists Ltd | Information & communication | 2023 |
| Titan BW APS UK Limited | Financial services | 2025 |
| Titan Resolutions Limited | Financial services | 2025 |
| TJ Tech Limited | Information & communication | 2020 |
| TLI Cycling Limited | Arts & recreation | 2010 |
| Top Fade Barberss Ltd | Other services | 2024 |
| Total ID Limited | Administrative & support | 2007 |
| TPC Joinery Limited | Manufacturing | 2025 |
| Trainer Vault Ltd | Wholesale & retail | 2025 |
| Transform Your Kitchen Franchise Ltd | Construction | 2019 |
| Transform Your Kitchen Ltd | Construction | 2017 |
| Transmus Limited | Transport & logistics | 2016 |
| Transportmcn Ltd | Transport & logistics | 2025 |
| Trident Commercial Holdings Limited | Water & waste | 1978 |
| Trident Metals Limited | Professional & scientific | 1996 |
| Trilby Pheasant Ltd | Wholesale & retail | 2014 |
| Trimotive Limited | Wholesale & retail | 2022 |
| Triumph Actuation Systems - UK, Ltd. | Administrative & support | 1983 |
| Triumph Aerospace Operations UK, Ltd. | Manufacturing | 1961 |
| Triumph Aerospace Systems Group - UK Ltd | Financial services | 2009 |
| Triumph Controls - UK, Ltd. | Manufacturing | 2009 |
| Triumph Group Holdings - UK, Ltd. | Financial services | 2002 |
| Triumph Structures International, Ltd. | Professional & scientific | 2007 |
| Truck Lease UK Limited | Administrative & support | 2012 |
| Trupro Ltd | Professional & scientific | 2016 |
| Ttuk Limited | Professional & scientific | 2012 |
| Turkish Scissors Ltd | Other services | 2025 |
| Turret Estates Ltd. | Real estate | 2022 |
| Tutor Help Limited | Administrative & support | 2018 |
| U C F Limited | Financial services | 2003 |
| UK Future Connectivity Forum Ltd. | Professional & scientific | 2019 |
| UK Wildrose Limited | Arts & recreation | 2026 |
| ULS Projects Limited | Manufacturing | 2025 |
| Unistow Global Limited | Manufacturing | 2017 |
| Univate Limited | Information & communication | 2015 |
| Unomedical Developments Limited | Professional & scientific | 1989 |
| Unomedical Holdings Limited | Professional & scientific | 1988 |
| Unomedical Limited | Wholesale & retail | 1970 |
| Unoplast (UK) Limited | Professional & scientific | 1976 |
| Upholstery and Beyond Ltd | Administrative & support | 2025 |
| Utiliqo Fabrications Limited | Manufacturing | 2025 |
| Valor Publishing (UK) Limited | Information & communication | 2024 |