| Tanglewood United Limited | Extraterritorial | 2026 |
| Tania B Limited | Transport & logistics | 2026 |
| Tans 4 U Limited | Other services | 2012 |
| TAP Property Limited | Real estate | 2024 |
| Tapedup Sports Ltd | Wholesale & retail | 2025 |
| Tapsell HSE Consultancy Ltd | Professional & scientific | 2026 |
| Tapton House Development Limited | Construction | 2023 |
| Tapton House Management Limited | Households | 2023 |
| Tara Brevitt Limited | Professional & scientific | 2021 |
| Taras Brook Ltd | Professional & scientific | 2024 |
| Target Construction Requirements Ltd | Education | 2022 |
| Tarnpik Business Consultancy Limited | Administrative & support | 2012 |
| Tarra Barber Ltd | Other services | 2021 |
| Tartariart Ltd | Professional & scientific | 2021 |
| TAS Accountants Limited | Administrative & support | 2006 |
| Tasci Estate Limited | Real estate | 2025 |
| Tasci Property Management Ltd | Households | 2025 |
| Task Force Jackal Ltd | Information & communication | 2026 |
| Taste Doncaster Ltd | Hospitality | 2025 |
| Taste of African Kitchen Ltd | Hospitality | 2026 |
| Taste of India Doncaster Limited | Hospitality | 2025 |
| Taste Peru (Chesterfield) Ltd | Hospitality | 2024 |
| Taste Peru Limited | Hospitality | 2019 |
| Tasty Pizza 62 Limited | Hospitality | 2023 |
| Tate Electrical Limited | Construction | 2006 |
| Tatendahl Limited | Professional & scientific | 2025 |
| Tatiana Dalgeanu Ltd | Transport & logistics | 2025 |
| Taurus Commercial Management Ltd | Professional & scientific | 2022 |
| Taurus Management Holding Limited | Financial services | 2024 |
| Taurus Project Management Services Ltd | Professional & scientific | 2025 |
| Taurus Transit Ltd | Transport & logistics | 2025 |
| Taverns and Tearooms Ltd | Hospitality | 2026 |
| Tavitu Enterprises Ltd | Health & social care | 2020 |
| Tavola Publishing Ltd | Information & communication | 2021 |
| Tax Ahoy Ltd | Professional & scientific | 2016 |
| Tax Office DM Limited | Professional & scientific | 2010 |
| Taxloop Limited | Professional & scientific | 2025 |
| Taya Media Limited | Information & communication | 2022 |
| Taylor Anderson Financial Services Limited | Extraterritorial | 1993 |
| Taylor Bracewell Holdings Limited | Financial services | 2022 |
| Taylor Bracewell Law Limited | Professional & scientific | 2017 |
| Taylor Clarke Wealth Management Limited | Professional & scientific | 2012 |
| Taylor Hathaway Wealth Management Limited | Financial services | 2015 |
| Taylor Stevenson Ltd | Administrative & support | 2019 |
| Taylor Stevenson Preston Ltd | Administrative & support | 2024 |
| Taylor's Maid Ltd | Administrative & support | 2023 |
| Taylor-Nottingham Letts Ltd | Real estate | 2017 |
| Taylored Steel and Construction Services Ltd | Construction | 2026 |
| Taylormade Talent Ltd | Administrative & support | 2025 |
| Taylors 23 Ltd | Professional & scientific | 2025 |
| Taylors Cladding Limited | Construction | 2014 |
| Taylors Consulting Solutions Limited | Professional & scientific | 2025 |
| Taylorscot Ltd | Wholesale & retail | 2014 |
| Taylorscot(Contracts) Ltd | Wholesale & retail | 2017 |
| TAZ Grills & Burgers Limited | Hospitality | 2023 |
| TB FM Solutions Ltd | Administrative & support | 2024 |
| TBA Doncaster Limited | Manufacturing | 1979 |
| Tbex Ltd | Transport & logistics | 2015 |
| TBM Opps Limited | Professional & scientific | 2024 |
| TBP Legal Ltd | Financial services | 2015 |
| Tbsk Holdings Limited | Professional & scientific | 2026 |
| TC Decorating and Spraying Contractors Ltd | Construction | 2019 |
| TC Demolition Ltd | Construction | 2022 |
| TC Plant Hire Epworth Ltd | Administrative & support | 2014 |
| TC7 Shopfitters Ltd | Construction | 2014 |
| TCC Carr LLP | | 2012 |
| TCE Transport Ltd | Transport & logistics | 2021 |
| Tchub Yorkshire Ltd | Health & social care | 2024 |
| TCR Euro Series Limited | Arts & recreation | 2017 |
| Tctm Ltd | Public administration | 2024 |
| TD Roofing & Sons Ltd | Construction | 2024 |
| Tdex LP | | 2021 |
| Tdlt Ltd | Real estate | 2022 |
| TDR Haulage Ltd | Transport & logistics | 2025 |
| Tea Collective Ltd | Information & communication | 2025 |
| Teaching AI Ltd | Information & communication | 2023 |
| Team Clean Group Limited | Administrative & support | 2025 |
| Team Outdoors Ltd | Other services | 2026 |
| Team Roberts Limited | Wholesale & retail | 1995 |
| Team Sports Wear Limited | Wholesale & retail | 2020 |
| Tear Free World Limited | Health & social care | 2018 |
| Teasdale Property Services Ltd | Extraterritorial | 2025 |
| Teasdale Transport Limited | Extraterritorial | 2015 |
| Teasdales Bakers (Holdings) Ltd | Manufacturing | 1983 |
| Teasdales Bakers Ltd | Administrative & support | 1938 |
| Tecc Ltd | Other services | 2026 |
| Tech Cleaning & Guarding Ltd. | Other services | 2010 |
| Tech Store Yorkshire Limited | Wholesale & retail | 2024 |
| Tech-Weld Limited | Administrative & support | 2005 |
| TECH24 Limited | Professional & scientific | 2003 |
| Techcaster Ltd | Information & communication | 2017 |
| Techedu Solution Ltd | Information & communication | 2025 |
| Techfloat Ltd | Administrative & support | 2025 |
| Techforce Europe Ltd | Construction | 2025 |
| Techknowledgy Ltd | Extraterritorial | 2025 |
| TECHNICAL4GROUP Ltd | Education | 2016 |
| Technimeasure Limited | Wholesale & retail | 1984 |
| Techniqual Engineering Limited | Manufacturing | 2015 |
| Technique Properties Ltd | Real estate | 2026 |
| Technology NOW Limited | Information & communication | 2022 |