| THE SKI Store Ltd | Wholesale & retail | 2022 |
| THE Smartthing Limited | Information & communication | 2009 |
| THE Solution Yoga Limited | Education | 2025 |
| THE Specialized Construction Company Construction Ltd | Wholesale & retail | 2024 |
| THE Stage Door Group Ltd | Financial services | 2022 |
| THE Story of O (Leeds) Ltd | Other services | 2009 |
| THE Strategy House Limited | Professional & scientific | 2002 |
| THE Stray Cake Studio Ltd | Manufacturing | 2025 |
| THE Stray Ferret Ltd | Information & communication | 2020 |
| THE Tannin Level Ltd | Hospitality | 2017 |
| THE Think INK Company Ltd | Manufacturing | 2012 |
| THE Tiny Teapot Boroughbridge Ltd | Hospitality | 2023 |
| THE Tordoff Gallery Ltd | Wholesale & retail | 2015 |
| THE Traditional Soap Company Ltd | Manufacturing | 2024 |
| THE Translation Works Ltd | Professional & scientific | 2012 |
| THE Travelling Artist Ltd | Wholesale & retail | 2025 |
| THE Treasure Chest (Harrogate) Ltd | Wholesale & retail | 2017 |
| THE Tree People (Harrogate) Limited | Professional & scientific | 2004 |
| THE Tulip (Harrogate) Limited | Hospitality | 2024 |
| THE Venture House Group Limited | Wholesale & retail | 2019 |
| THE Village Garage Limited | Wholesale & retail | 2000 |
| THE Vintage Furniture Company Limited | Manufacturing | 2013 |
| THE Wannabe Agency Limited | Arts & recreation | 2005 |
| THE Warehouse Ripon Limited | Households | 2018 |
| THE Waste Team Leeds Limited | Water & waste | 2025 |
| THE Watermill (Pateley Bridge) Ltd | Households | 2003 |
| THE Wellness Clinic Group Ltd | Real estate | 2022 |
| THE Whole Caboodle Agency LLP | | 2006 |
| THE Wildish Club CIC | Education | 2022 |
| THE Wildish Store Ltd | Wholesale & retail | 2022 |
| THE Woodfield Foundation | Administrative & support | 2010 |
| THE Wright PUB Group Limited | Hospitality | 2016 |
| THE York Control Maintenance Company Limited | Professional & scientific | 2009 |
| THE Yorkshire Graze Box Ltd | Hospitality | 2021 |
| THE Yorkshire Hearing Clinic Ltd | Wholesale & retail | 2020 |
| THE Yorkshire Joinery Workshop Limited | Manufacturing | 2021 |
| THE Yorkshire Spice Company Ltd | Manufacturing | 2024 |
| THE Yorkshire Tennis Foundation | Education | 2022 |
| THE Yorkshire Young Achievers Foundation | Other services | 2010 |
| THE Zaika Hub Ltd | Hospitality | 2025 |
| The-Dogwalker (Yorkshire) Ltd | Other services | 2009 |
| Theakston Group Limited | Extraterritorial | 2026 |
| Thearchotel Limited | Hospitality | 2016 |
| Theatresearch Ltd | Arts & recreation | 2005 |
| Theatreshire Books Ltd | Wholesale & retail | 2005 |
| Thecourier Ltd | Transport & logistics | 2023 |
| Theirry Limited | Extraterritorial | 2022 |
| Thenia 3 Limited | Real estate | 2020 |
| Thenia 4 Limited | Real estate | 2021 |
| Thenia Limited | Professional & scientific | 2023 |
| Theodorini Limited | Wholesale & retail | 2024 |
| Therapi Ltd | Other services | 2013 |
| Theraproval Ltd. | Professional & scientific | 2018 |
| There Travel Limited | Administrative & support | 2024 |
| There's Light Limited | Administrative & support | 2017 |
| Theredboxgifts.Com Limited | Wholesale & retail | 2021 |
| Thermo Pooch Ltd | Wholesale & retail | 2025 |
| Thermopatch Sports Ltd | Manufacturing | 1991 |
| Thermshield International Limited | Extraterritorial | 2020 |
| Theroux Limited | Extraterritorial | 2026 |
| Thescranvan Ltd | Hospitality | 2025 |
| These Four Walls Properties Limited | Real estate | 2003 |
| Thesecretgarden Ltd | Education | 2025 |
| Thewriterscollective Ltd | Education | 2023 |
| Think Architecture and Design Limited | Extraterritorial | 2017 |
| Think Architecture Limited | Professional & scientific | 2009 |
| Think COW Ltd | Wholesale & retail | 2021 |
| Think Nourished Ltd | Administrative & support | 2018 |
| Think Property Developments Limited | Real estate | 2012 |
| Thinking Together Limited | Professional & scientific | 2014 |
| Thinksmith Limited | Professional & scientific | 1999 |
| Third EYE Film Productions Ltd. | Administrative & support | 2003 |
| Third Sector Advertising LLP | | 2026 |
| Thirdperson Group Limited | Financial services | 2025 |
| Thirdperson Limited | Professional & scientific | 2002 |
| Thirkill Family Investments Limited | Financial services | 2024 |
| Thirsk Smiles Ltd | Health & social care | 2021 |
| Thirsty Planet Limited | Manufacturing | 2006 |
| Thirty Eight Degrees Limited | Wholesale & retail | 2022 |
| This N' That Enterprises Limited | Wholesale & retail | 1995 |
| This Film Production Limited | Information & communication | 2017 |
| Thistle - Relational Children and Family Services Limited | Professional & scientific | 2026 |
| Thistle Environmental Bidco Limited | Professional & scientific | 2024 |
| Thistle Environmental Limited | Financial services | 2023 |
| THK Consulting Limited | Information & communication | 2022 |
| Thomas Bennett Limited | Real estate | 1995 |
| Thomas Kent Limited | Extraterritorial | 2026 |
| Thomas Neal Limited | Information & communication | 2025 |
| Thompson Corporation Ltd | Financial services | 2025 |
| Thomson Environmental Consultants Holdings Limited | Professional & scientific | 2020 |
| Thomson Environmental Consultants Limited | Administrative & support | 2002 |
| Thomson Gough Ltd | Wholesale & retail | 2026 |
| Thong Properties Ltd | Real estate | 2025 |
| Thonyx Ltd | Other services | 2022 |
| Thorn Group Limited | Households | 2025 |
| Thornberry Limited | Extraterritorial | 2025 |
| Thornton Lodge Estates Ltd | Real estate | 2019 |
| Thorntree Vale (Thornaby) Management Company Limited | Households | 2007 |
| Thoroughbred Estates Limited | Real estate | 2015 |
| Thorpe Hodgson Limited | Professional & scientific | 2011 |