| Tichsol Limited | Health & social care | 2018 |
| Tide Design Ltd | Manufacturing | 2020 |
| Tigrida Wealth Ltd | Professional & scientific | 2024 |
| Timberlab Limited | Manufacturing | 2024 |
| Time 2 Learn Training Academy Ltd | Education | 2021 |
| Tinbar Limited | Hospitality | 1998 |
| Tinkerbell's Treats Ltd | Wholesale & retail | 2020 |
| Tio’S Piri Piri Ltd | Hospitality | 2025 |
| Tips Box Ltd | Wholesale & retail | 2025 |
| Titan Autosourcing Ltd | Wholesale & retail | 2026 |
| Tiveltis Group Ltd | Transport & logistics | 2018 |
| TJM Developments Yorkshire Ltd | Construction | 2007 |
| Tjmengineer Ltd | Professional & scientific | 2022 |
| TK Shali Ltd | Wholesale & retail | 2017 |
| TLB Property Holdings Ltd | Real estate | 2026 |
| TML Lettings Ltd | Real estate | 2024 |
| Tokies Ltd | Hospitality | 2017 |
| Tol-Nat Ltd | Transport & logistics | 2020 |
| Toland Brown Enterprises Limited | Real estate | 2009 |
| Tomlinson Estates Limited | Real estate | 2022 |
| Tooth & Tiger (Pontefract) Ltd | Hospitality | 2023 |
| Top Charger Ltd | Wholesale & retail | 2025 |
| Top Model Healthcare Recruitment Ltd | Administrative & support | 2022 |
| Top Tier Tiling Limited | Construction | 2026 |
| Torne Consulting Limited | Real estate | 2006 |
| Torne Property Developments Ltd. | Real estate | 2012 |
| Total FM Ltd | Construction | 2018 |
| Total Price Ltd | Information & communication | 2026 |
| Touba Darou Ltd | Administrative & support | 2016 |
| Tour Britain Limited | Administrative & support | 2024 |
| Town House Traders Limited | Wholesale & retail | 2011 |
| Tractor Factor Limited | Transport & logistics | 2017 |
| Trade for Profits Ltd | Financial services | 2019 |
| Trade Price Flooring Ltd | Construction | 2025 |
| Tradelink (UK) Limited | Wholesale & retail | 2013 |
| Transcriptum Limited | Other services | 2016 |
| Transgutek Limited | Transport & logistics | 2017 |
| Transpennine Garage Equipment Ltd | Manufacturing | 2018 |
| Transpole Developments Ltd | Real estate | 2025 |
| Transport Operator Compliance Services Limited | Professional & scientific | 2017 |
| Trash the Studio Ltd | Professional & scientific | 2022 |
| Travel 27 Ltd | Administrative & support | 2021 |
| Tregg Ltd. | Transport & logistics | 2025 |
| Tregoning Power Limited | Administrative & support | 2014 |
| Trendy Haircutz Ltd | Other services | 2020 |
| TRI Nova Construction Ltd | Construction | 2022 |
| Tribology Solutions Limited | Professional & scientific | 2002 |
| Trinity Labs Ltd | Manufacturing | 2025 |
| Triton Electrical Ltd | Construction | 2019 |
| Trivana Care Limited | Administrative & support | 2025 |
| Trixie-Lynn Ltd | Administrative & support | 2025 |
| TRS Site Services Limited | Construction | 2025 |
| Truckingby Holdings Limited | Financial services | 2024 |
| Trust Installations Ltd | Construction | 2025 |
| Trusted Fire Inspections Limited | Professional & scientific | 2016 |
| TSB Global Limited | Information & communication | 2023 |
| Tshali Ltd | Wholesale & retail | 2019 |
| TSR Property Care (Yorkshire) Ltd | Construction | 2014 |
| TU Kitchen Limited | Hospitality | 2020 |
| Tucanoo Solutions Ltd | Information & communication | 2011 |
| Tudor Court Residents Association (South Elmsall) Limited | Households | 1994 |
| Tulsi Pontefract Ltd | Hospitality | 2022 |
| Tunstall Local Ltd | Real estate | 2024 |
| Turnberry Gifts Limited | Wholesale & retail | 2023 |
| Turnkey Auto Solutions Ltd | Wholesale & retail | 2017 |
| Turnkey Property Holdings Ltd | Real estate | 2024 |
| Turnkey Rentals Ltd | Real estate | 2020 |
| Turnkey Surveyors Ltd | Professional & scientific | 2022 |
| Turntables Badminton Coaching CIC | Education | 2026 |
| TW Plumbing & Bathrooms Ltd | Households | 2026 |
| TWF Property Ltd | Real estate | 2024 |
| Twisted Properties Limited | Real estate | 2024 |
| Twistedesign Limited | Professional & scientific | 2013 |
| Two Towers Ltd | Administrative & support | 2026 |
| Twyford Alliance Limited | Professional & scientific | 2023 |
| U Zdzicha Polish Shop Market Ltd | Wholesale & retail | 2025 |
| Ubique Green Limited | Manufacturing | 2026 |
| UFW Holdco Ltd | Financial services | 2019 |
| UFW Topco Limited | Financial services | 2022 |
| UG Innovations Ltd | Education | 2025 |
| UK Afrilink Limited | Wholesale & retail | 2026 |
| UK Event Structures Ltd | Administrative & support | 2022 |
| UK Malayisha Ltd | Transport & logistics | 2026 |
| UK Pressing Limited | Manufacturing | 2019 |
| UK Street Style Ltd | Wholesale & retail | 2015 |
| Ukfastbox Ltd | Wholesale & retail | 2025 |
| UKI Services Limited | Construction | 2018 |
| Ulrick & Short Limited | Wholesale & retail | 2000 |
| Ultimate Shred Academy Community CIC | Education | 2026 |
| Ultimate Shred Academy Ltd | Administrative & support | 2022 |
| Ultimate Stoves (Yorkshire) Ltd | Construction | 2023 |
| Ultra-Print Limited | Manufacturing | 2008 |
| Undercut Tree Services Limited | Agriculture & fishing | 2006 |
| Underwood Plumbing & Heating Limited | Construction | 2018 |
| UNI Guidance Ltd | Education | 2024 |
| Uniforms for Work Limited | Manufacturing | 2009 |
| Unique Support Care Services Limited | Health & social care | 2015 |
| Universal Coaching Academy UK Ltd | Information & communication | 2018 |
| Universal Leisure Services UK Ltd | Transport & logistics | 2020 |
| Universal Retail Limited | Wholesale & retail | 2002 |