| Techy Limited | Information & communication | 2011 |
| Tectrailers Ltd | Manufacturing | 2010 |
| TEE N CEE Ltd | Health & social care | 2023 |
| Teeny Weeny Films Ltd | Information & communication | 2025 |
| Teesbeautyroom Ltd | Wholesale & retail | 2024 |
| Teetom Ltd | Wholesale & retail | 2026 |
| Teevan Plastering Limited | Construction | 2007 |
| Teevan Properties Ltd | Real estate | 2019 |
| Tefo Mofokeng Limited | Health & social care | 2020 |
| TEG Holdings Limited | Arts & recreation | 2017 |
| Teji Tech Ltd | Information & communication | 2026 |
| TEK H & S Limited | Manufacturing | 2011 |
| Tekaida Consulting Ltd | Professional & scientific | 2024 |
| Teleaga Transport Ltd | Transport & logistics | 2024 |
| Telecomworld Ltd | Administrative & support | 2016 |
| Telekinetix Limited | Information & communication | 1998 |
| Telemaster Limited | Other services | 2003 |
| Telephonetics Limited | Professional & scientific | 2004 |
| Telopea Managed Services Limited | Health & social care | 2008 |
| Telron Events Ltd | Construction | 2026 |
| Telron Services Limited | Information & communication | 2019 |
| Temac Demoliton and Construction Co. Limited | | 1974 |
| Temfem Limited | Hospitality | 2017 |
| Temilolade Limited | Health & social care | 2020 |
| Temitayo Healthcare Ltd | Health & social care | 2014 |
| Tempeh-Tempeh Ltd | Hospitality | 2013 |
| Temperley Research Limited | Administrative & support | 2004 |
| Temple Flooring Limited | Wholesale & retail | 2017 |
| Temple of Denim Ltd | Wholesale & retail | 2022 |
| Temple Therapy Ltd | Other services | 2026 |
| Temples Hair Salon Limited | Other services | 2008 |
| Tempo Eventz Ltd | Professional & scientific | 2025 |
| Tempo Trails Ltd | Arts & recreation | 2018 |
| Temporal Events Limited | Administrative & support | 2024 |
| Tempsford Trading Ltd | Hospitality | 2018 |
| TEN Fitness Ltd | Arts & recreation | 2021 |
| TEN ST. Andrews Road Bedford Ltd | Households | 2012 |
| Tenant Matters Limited | Hospitality | 2007 |
| Tench Ltd | Professional & scientific | 2017 |
| Tenderhaven Care Ltd | Administrative & support | 2026 |
| Tenderness Care Services Limited | Health & social care | 2023 |
| Tenfortu Limited | Health & social care | 2024 |
| Tennis Media Ltd | Information & communication | 2026 |
| Tenpin (Halifax) Limited | Arts & recreation | 2006 |
| Tenpin (Sunderland) Limited | Arts & recreation | 2006 |
| Tenpin Entertainment Limited | Arts & recreation | 2017 |
| Tenpin Five Limited | Arts & recreation | 2015 |
| Tenpin Limited | Arts & recreation | 2003 |
| Tenpin One Limited | Arts & recreation | 2015 |
| TEO35 Construction Ltd | Construction | 2019 |
| Tequila Developments Limited | Construction | 2014 |
| Tequilitis Limited | Wholesale & retail | 2025 |
| Tera-Byte Consulting Ltd | Information & communication | 2026 |
| Terminal Productions Limited | Real estate | 2009 |
| Terratech Solutions Ltd | Professional & scientific | 2023 |
| Terravane Ltd | Real estate | 2025 |
| Terraverde Trading Co. Ltd | Wholesale & retail | 2024 |
| TES Accountants Ltd | Professional & scientific | 2023 |
| Tesla Consulting Limited | Professional & scientific | 2015 |
| Tesla Live Ltd | Construction | 2017 |
| Tesla Management Limited | Professional & scientific | 2014 |
| Testa Corporation Ltd | Financial services | 2026 |
| Testa Enterprises Ltd | Professional & scientific | 2025 |
| Tester Hire Limited | Professional & scientific | 2009 |
| Tetley Plumbing and Heating Services Limited | Construction | 2013 |
| TEV Solutions Ltd | Professional & scientific | 2015 |
| Tewin Property Development Limited | Professional & scientific | 2009 |
| Texellent Solutions Limited | Information & communication | 1996 |
| Textile Hub MJ Limited | Wholesale & retail | 2026 |
| Textiles Business Holdings Limited | Financial services | 2020 |
| Tezaur Ltd | Wholesale & retail | 2025 |
| TF Care Services Ltd | Health & social care | 2021 |
| TF Pump Supplies & Services Limited | Administrative & support | 2000 |
| TFA Carsales and Recovery Ltd | Water & waste | 2019 |
| TFC Bedford Ltd | Hospitality | 2022 |
| TFD Painting & Decorating Ltd | Construction | 2019 |
| TFE Financial Services Ltd. | Financial services | 2010 |
| Tfplus Ltd | Other services | 2024 |
| TGE Infrastructure Capital Limited | Financial services | 2020 |
| TGE Management Company Limited | Professional & scientific | 2017 |
| Thabva Investment Holdings Limited | Financial services | 2018 |
| Thai Orchid Barton Ltd | Hospitality | 2024 |
| Thai to Walk Ltd | Hospitality | 2026 |
| Thali & Tandoor Ltd | Hospitality | 2017 |
| Thames (Roofing & Building Supplies) Limited | Wholesale & retail | 1983 |
| Thami Care Ltd | Health & social care | 2017 |
| Thanal Property Services Ltd | Real estate | 2023 |
| Thandal Transport Ltd | Transport & logistics | 2025 |
| That's SO YOU Limited | Wholesale & retail | 2017 |
| THC Services Ltd | Professional & scientific | 2010 |
| THD Studios Limited | Other services | 2018 |
| THE 360 View Service Limited | Professional & scientific | 2017 |
| THE 3R Diabetes Reversal System Limited | Health & social care | 2024 |
| THE 42 Group Limited | Wholesale & retail | 2020 |
| THE Absolute Works Ltd | Wholesale & retail | 1992 |
| THE Accounting Lounge Limited | Professional & scientific | 2025 |
| THE Active Wellness Project Ltd | Arts & recreation | 2021 |
| THE Aditi Collection Limited | Professional & scientific | 2014 |
| THE Airedale Nursing Home Limited | Health & social care | 2007 |
| THE ALL Round Confidence Company Ltd | Education | 2016 |