| Taxpertuk Limited | Wholesale & retail | 2017 |
| TAY Firth Laminates Limited | Wholesale & retail | 2007 |
| Taylor Dunne Limited | Construction | 2014 |
| Taylor Electrical Services (Staffs) Limited | Wholesale & retail | 2009 |
| Taylor Grange Developments Limited | Real estate | 2008 |
| Taylor Made Refurbs Ltd | Construction | 2017 |
| Taylor Made Smiles Limited | Professional & scientific | 2017 |
| Taylormade Beauty & Aesthetics Ltd | Other services | 2024 |
| Taylormade Construction Limited | Construction | 2011 |
| Taylormade Management Consulting Limited | Professional & scientific | 2004 |
| Taylormade Training Academy Ltd | Education | 2024 |
| Taylors Commercials Ltd | Construction | 2019 |
| Taylors Construction and Paving Limited | Construction | 2024 |
| Tayyab Masood and Company Ltd | Wholesale & retail | 2025 |
| TAZ1985 Ltd | Wholesale & retail | 2026 |
| TB Services and Solutions Ltd | Wholesale & retail | 2019 |
| TB Styling Ltd | Other services | 2026 |
| TB Tiling & Plumbing Limited | Construction | 2026 |
| TBC Stoke Ltd | Construction | 2022 |
| Tbpub Limited | Hospitality | 2025 |
| TBS Amwell Limited | Administrative & support | 2019 |
| TBS Global Ltd | Information & communication | 2021 |
| TBS Labour Ltd | Administrative & support | 2019 |
| Tbss Care Ltd | Health & social care | 2022 |
| TBW Mini Market Limited | Wholesale & retail | 2024 |
| TC & Sons Limited | Construction | 2012 |
| TC Care Global Ltd | Transport & logistics | 2021 |
| TCC Holdings Ltd | Financial services | 2006 |
| TCD Designs Ltd | Manufacturing | 2025 |
| TCG Catering Limited | Hospitality | 2016 |
| TCG Nerd Castle Ltd | Wholesale & retail | 2026 |
| TCH Motors Ltd | Wholesale & retail | 2024 |
| TCS Home & Garden Ltd | Administrative & support | 2025 |
| TCS Hospitality Ltd | Hospitality | 2025 |
| TD Commercials Ltd | Wholesale & retail | 2022 |
| TDM Consult Limited | Professional & scientific | 2025 |
| TDM Rentals Limited | Real estate | 2023 |
| Teaching Business and Economics Limited | Information & communication | 2020 |
| Teal Cat Ltd | Professional & scientific | 2024 |
| Teal Legal Limited | Information & communication | 2018 |
| Team Elite Kickboxing Limited | Arts & recreation | 2021 |
| Team Maker Limited | Professional & scientific | 2022 |
| Team Viking Ltd | Arts & recreation | 2019 |
| Teams Property Holdings Limited | Financial services | 2022 |
| Tean Pharmacy Limited | Wholesale & retail | 2003 |
| Tebbitts & Sons (Home Bake) Limited | | 1977 |
| Tech 36T Ltd | Information & communication | 2019 |
| Tech ERA Digital Hub Ltd | Information & communication | 2026 |
| Techcastle Digital Ltd | Information & communication | 2023 |
| Technical Engineering Validation Services Ltd | Construction | 2021 |
| Technical Equipment and Logistics LLP | | 2025 |
| Technology Forming Limited | Professional & scientific | 1998 |
| Techshifts Media Limited | Information & communication | 2020 |
| Techsinc Limited | Wholesale & retail | 2024 |
| Techtyremobile Ltd | Wholesale & retail | 2026 |
| Tectime Data Systems Limited | Manufacturing | 1975 |
| TED Tyres Ltd | Wholesale & retail | 2024 |
| Tedec Building & Maintenance Ltd | Extraterritorial | 2018 |
| TEE JAY Executive Selections Ltd | Wholesale & retail | 2021 |
| Teehive Ltd | Manufacturing | 2025 |
| Teejay Motors Ltd | Wholesale & retail | 2024 |
| Teemuch Hair Limited | Health & social care | 2025 |
| Teen Yoga Camp Ltd | Arts & recreation | 2022 |
| Tegiwa Holdings Ltd | Financial services | 2014 |
| Tegiwa Imports Limited | Wholesale & retail | 2006 |
| Tehran Carpet Ltd | Wholesale & retail | 2025 |
| Tehroob and Hasan Ltd | Manufacturing | 2013 |
| Teknavo Group Limited | Professional & scientific | 2005 |
| Teknavo UK Limited | Administrative & support | 2005 |
| Teknavo Ventures Limited | Information & communication | 2016 |
| Teknik Yapi Limited | Construction | 2020 |
| Telecom 150 Ltd | Information & communication | 2010 |
| Telesiseagle Limited | Manufacturing | 1983 |
| Telestai Ltd | Wholesale & retail | 2025 |
| Tellwrights Limited | Water & waste | 2025 |
| Telstrong Developments Ltd | Construction | 2022 |
| Telstrong Properties Ltd | Real estate | 2021 |
| Templar Distributors Limited | Wholesale & retail | 2015 |
| TEN3SASSETS Limited | Real estate | 2020 |
| Tenance Property Limited | Real estate | 2020 |
| Tender Glove Healthcare Ltd | Health & social care | 2021 |
| Tendersprout Care Ltd | Administrative & support | 2026 |
| Teo&Alex Trans Limited | Transport & logistics | 2019 |
| Terasec Ltd | Information & communication | 2025 |
| Tereza Raluca Banica Ltd | Transport & logistics | 2025 |
| Term Controls Ltd | Professional & scientific | 2019 |
| Terrafix Limited | Manufacturing | 1982 |
| Terraxis Eco-Build Ltd | Construction | 2025 |
| Terry Foods Ltd | Wholesale & retail | 2005 |
| Terry Jones Ltd | Construction | 2003 |
| TES 28 Ltd | Construction | 2018 |
| TES28 Properties Ltd | Real estate | 2020 |
| Test and FIX Electrical Ltd | Construction | 2023 |
| Texas Bucknall Ltd | Hospitality | 2026 |
| Texas Fried Chicken Ltd | Hospitality | 2025 |
| TF Power Consulting Limited | Construction | 2026 |
| TFK Property Limited | Real estate | 2009 |
| TFL Ledertechnik UK Ltd | Professional & scientific | 2021 |
| TFP Prison Care Services Limited | Health & social care | 2015 |
| TFR Venture Holdings Limited | Financial services | 2013 |