| Tapeformers Ltd | Manufacturing | 2005 |
| Tapify Limited | Information & communication | 2025 |
| Taskpro Ltd | Health & social care | 2020 |
| Taste Innovation Ltd | Professional & scientific | 2013 |
| Taste of Athens Limited | Hospitality | 2025 |
| Taste of Bengal House Ltd | Hospitality | 2025 |
| Tasty Spot Ltd | Hospitality | 2025 |
| Tattel Ltd | Information & communication | 2021 |
| Taurus Wojciech Niegolewski Ltd | Wholesale & retail | 2019 |
| Tawk Consulting Ltd | Information & communication | 2010 |
| Taxassist Accountants (Loughborough) Ltd | Professional & scientific | 1999 |
| Taxi Consolidation Group Yorkshire Limited | Transport & logistics | 2021 |
| Taybourne Ltd | Professional & scientific | 2020 |
| Taylah Ltd | Transport & logistics | 2019 |
| Taylor Decorators Limited | Construction | 2014 |
| Taylor Moss Group Limited | Financial services | 2022 |
| Taylor Towers Limited | Real estate | 2020 |
| Taylors Agricultural Limited | Agriculture & fishing | 2011 |
| Taym Clothing Limited | Manufacturing | 2020 |
| Tayplay Activity Camps Ltd | Education | 2017 |
| TB Electical Enginnering Limited | Manufacturing | 2017 |
| TB Vehicle Movements Ltd | Transport & logistics | 2023 |
| TB12 Media Limited | Professional & scientific | 2023 |
| Tbok Limited | Manufacturing | 2026 |
| TC Brickwork Ltd | Construction | 2019 |
| TC Qualitas Ltd | Professional & scientific | 2025 |
| TCS NOTTINGHAM(2023) Limited | Administrative & support | 2023 |
| TCX Technical Services Ltd | Professional & scientific | 2020 |
| Tcxt Ltd | Professional & scientific | 2024 |
| TDC of Leicester Ltd | Wholesale & retail | 2018 |
| TDP Management Limited | Wholesale & retail | 2009 |
| Teachgen AI Ltd | Information & communication | 2023 |
| Team Champions Limited | Arts & recreation | 2005 |
| Team Evans Performance Limited | Arts & recreation | 2022 |
| Team-Up Solution Limited | Administrative & support | 2025 |
| TEC Electrical Services Ltd | Construction | 2010 |
| Tech Installs Ltd | Wholesale & retail | 2023 |
| TECH2 Body Repair Ltd | Wholesale & retail | 2018 |
| Technical Acoustic Solutions Ltd | Manufacturing | 2007 |
| Technical Service Support Limited | Professional & scientific | 2000 |
| Technical Tycoons Ltd | Information & communication | 2020 |
| Technicut Limited | Manufacturing | 1978 |
| Technicut Overseas Holdings Limited | Financial services | 2022 |
| Technology in Medicine Limited | Health & social care | 2004 |
| Technology Solutions (UK) Limited | Manufacturing | 1993 |
| Technoshed Software Ltd | Professional & scientific | 2024 |
| Techsky Ltd | Information & communication | 2011 |
| TEG Vape Limited | Wholesale & retail | 2024 |
| TEK Juice Limited | Information & communication | 2023 |
| Teko Images Limited | Arts & recreation | 2025 |
| Telemara Limited | Wholesale & retail | 2021 |
| Telford Coffee Ltd | Hospitality | 2014 |
| Teller Bar Ltd | Hospitality | 2021 |
| Temboland Limited | Health & social care | 2025 |
| Temperance Property Limited | Real estate | 2021 |
| Templar Health & Safety Consulting Ltd | Professional & scientific | 2023 |
| Temptech Automotive Limited | Wholesale & retail | 2023 |
| Tenancy FOX Ltd | Real estate | 2025 |
| Tenex Business Performance Limited | Information & communication | 2025 |
| Tenight Ltd | Information & communication | 2023 |
| TER Sports Ltd | Arts & recreation | 2025 |
| Terech Trans Limited | Transport & logistics | 2020 |
| Terra Consulting Group Ltd | Professional & scientific | 2019 |
| Terzza Holdings Limited | Real estate | 2016 |
| Testa Technical Services Ltd | Construction | 2020 |
| Tetch Limited | Professional & scientific | 2020 |
| Tetra Communications Ltd | Information & communication | 2024 |
| Tetraelc(Uk) Limited | Hospitality | 2016 |
| Tetragrammaton Ltd | Health & social care | 2021 |
| TEW Hands Interpreting Ltd | Professional & scientific | 2015 |
| TF Consortium Ltd | Real estate | 2025 |
| TFS Systems (UK) Limited | Wholesale & retail | 2008 |
| TFY Bespoke Building Ltd | Manufacturing | 2025 |
| TG CAD Services Ltd | Information & communication | 2014 |
| TG Rugara Services Ltd | Health & social care | 2012 |
| TH Communications Limited | Information & communication | 2006 |
| Thai Food at Home Ltd | Hospitality | 2024 |
| Thames Cruises London Limited | Administrative & support | 2012 |
| Thames Dinner Cruises Ltd | Administrative & support | 2010 |
| That English Accent Ltd | Education | 2021 |
| That's IT Done Ltd | Professional & scientific | 2016 |
| THE 13 Group Ltd | Professional & scientific | 2025 |
| THE 4TH Club Limited | Health & social care | 2026 |
| THE Aegean Supplies Limited | Wholesale & retail | 2026 |
| THE Aesthetics SS Ltd | Other services | 2019 |
| THE African Oasis CIC | Professional & scientific | 2021 |
| THE Amateur Swimming Association (Swim England) Limited | Education | 2017 |
| THE Anchor Inn Walton Limited | Hospitality | 2014 |
| THE Animallist Ltd | Other services | 2025 |
| THE Art of Building Ltd | Professional & scientific | 2003 |
| THE Association of Bookkeepers Limited | Other services | 2022 |
| THE Azan's Group Limited | Wholesale & retail | 2025 |
| THE Badger Group Limited | Information & communication | 2017 |
| THE Barber's Lounge @ Quorn Ltd | Other services | 2019 |
| THE Bath & Tile Depot Limited | Wholesale & retail | 2011 |
| THE Beacon Collective UK Limited | Professional & scientific | 2025 |
| THE Beauty Studio ( East Leake) Limited | Wholesale & retail | 2015 |
| THE Bengal Barrow Limited | Hospitality | 2023 |
| THE Beyond Typical Collective CIC | Education | 2026 |
| THE Black Excellence Hub UK CIC | Education | 2024 |