| THE Literacy Engine Ltd | Information & communication | 2023 |
| THE Marble Edit Limited | Wholesale & retail | 2026 |
| THE Mill Tea Rooms Ltd | Hospitality | 2015 |
| THE Motorcycle Action Group Limited | Other services | 2014 |
| THE Movement Laboratory Limited | Health & social care | 2021 |
| THE New Primrose Cafe Ltd | Hospitality | 2024 |
| THE Ninth (Castleford) Ltd | Hospitality | 2023 |
| THE Northern Star Estate Agents Ltd | Real estate | 2026 |
| THE Oak(Glasshoughton) Limited | Hospitality | 2013 |
| THE Pole Wizard Ltd | Arts & recreation | 2024 |
| THE Pontefract Liquorice Company Limited | Wholesale & retail | 2017 |
| THE Private Hire & Taxi Company Ltd | Transport & logistics | 2017 |
| THE Respray Team (Leeds) Limited | Construction | 2024 |
| THE Rock Factory Limited | Wholesale & retail | 2014 |
| THE Safety Sheep Group Limited | Wholesale & retail | 2024 |
| THE Sales Gym Limited | Administrative & support | 2024 |
| THE Sign Shed Limited | Manufacturing | 2014 |
| THE Spectacles Room Ltd | Health & social care | 2009 |
| THE Tattoo Vault Ltd | Arts & recreation | 2026 |
| THE Thirsty Steed Ltd | Hospitality | 2021 |
| THE Tipsey Trailer & Co Ltd | Hospitality | 2025 |
| THE Toys Shop Limited | Wholesale & retail | 2020 |
| THE Tyre Shop & MOT Centre Ltd | Wholesale & retail | 2014 |
| THE Vapor Heaven Ltd | Wholesale & retail | 2026 |
| THE Wandering Will Writer Limited | Professional & scientific | 2026 |
| THE Yorkshire Bodyshop Ltd | Wholesale & retail | 2026 |
| THE Yorkshire Broker Ltd | Financial services | 2021 |
| THE Yorkshire Renovation Company Limited | Professional & scientific | 2014 |
| Thedrivingnetwork Ltd | Other services | 2025 |
| Themba Pet Services Ltd | Other services | 2020 |
| Thewhitebearbedale Ltd | Hospitality | 2026 |
| THL Installations Ltd. | Professional & scientific | 2015 |
| Thornesgate Apartments Resident Management Company Limited | Households | 2026 |
| Thornesgate Estate Resident Management Company Limited | Households | 2026 |
| Thorpe Park Plot 4300 Management Company Limited | Real estate | 2006 |
| Thread Mastery Ltd | Manufacturing | 2025 |
| Thrive Bywater Fitness Ltd | Arts & recreation | 2026 |
| Tian HUA Takeaway Limited | Hospitality | 2025 |
| Tierra Ltd | Construction | 2019 |
| Tiger Bites Sandwich Bar Ltd | Hospitality | 2022 |
| Tiger Cars (CAS) Ltd | Transport & logistics | 2014 |
| Tiger Developments (Entertainment) Limited | Information & communication | 1988 |
| Tiger Kutz Limited | Other services | 2025 |
| Tigers Spirits Ltd | Wholesale & retail | 2019 |
| Tigers Trust | Education | 2007 |
| TIJ Services Ltd | Professional & scientific | 2024 |
| Timekeepers of Castleford Ltd | Other services | 2023 |
| Tinyidea Community CIC | Education | 2026 |
| Tiptop Laptop Ltd. | Other services | 2018 |
| TK Property Services Ltd | Construction | 2023 |
| TK VEG Food & Wine Limited | Wholesale & retail | 2017 |
| Tomib Ltd | Transport & logistics | 2015 |
| Toms Transport 1 Limited | Transport & logistics | 2019 |
| Tony Berry BID Solutions Ltd | Professional & scientific | 2018 |
| Toolz 4 YOU Ltd | Wholesale & retail | 2016 |
| Top Day Ltd | Information & communication | 2008 |
| Top Property AJM Ltd | Real estate | 2025 |
| Topdec Decorators Ltd | Construction | 2025 |
| Topsy Turvy Theatre Limited | Education | 2010 |
| Torafines Ltd | Manufacturing | 2025 |
| Toronto Properties Ltd | Real estate | 2022 |
| Total Environmental Compliance Limited | Other services | 1995 |
| Tour Issue Golf Ltd | Wholesale & retail | 2020 |
| Town and City Investments Ltd | Real estate | 2023 |
| Town Hand Car Wash Limited | Administrative & support | 2026 |
| Toys and Gadgets Ltd | Wholesale & retail | 2025 |
| Toyz N Gadgetz Limited | Wholesale & retail | 2018 |
| TP Industrial Concrete Ltd | Construction | 2025 |
| Tracked Spider Solutions (UK) Limited | Administrative & support | 2015 |
| Trackside Testing Services Limited | Transport & logistics | 2009 |
| Trade Bathroom Fitting Ltd | Construction | 2014 |
| Trade Bathroom Fitting Services Ltd | Construction | 2018 |
| Trade Bathrooms & Tiles Limited | Wholesale & retail | 2002 |
| Trading Safely Ltd | Professional & scientific | 2013 |
| Train Holdings Limited | Financial services | 2015 |
| Trak Land and Property Ltd | Real estate | 2022 |
| Transform Haus Properties Ltd | Real estate | 2025 |
| Transformers North CIC | Administrative & support | 2016 |
| Transport Reality Ltd | Education | 2020 |
| Travel Ingredients Limited | Administrative & support | 2020 |
| Traversus Consulting Limited | Professional & scientific | 2017 |
| Tribe Appointments Ltd | Administrative & support | 2025 |
| Trident Steel Fabrications Ltd | Manufacturing | 2024 |
| Trinity Fire and Security Systems Ltd | Administrative & support | 1997 |
| Triple H Group Ltd | Financial services | 2026 |
| Trojan Trans UK Ltd | Manufacturing | 2024 |
| Trust Heat Yorkshire Limited | Construction | 2018 |
| TS Payroll Services Limited | Administrative & support | 2025 |
| Tssl of Doncaster Limited | Administrative & support | 2023 |
| TT Holdings and Developments Ltd | Construction | 2026 |
| Tulips World Ltd | Hospitality | 2019 |
| Tunex Limited | Transport & logistics | 2022 |
| Tuntos Aroma Ltd | Hospitality | 2018 |
| Turtle Yachting Ltd | Manufacturing | 2025 |
| Twin Feather Properties Limited | Real estate | 2026 |
| Twinkle Events Company Limited | Administrative & support | 2019 |
| Twisted Edge Limited | Other services | 2010 |
| Twisted Tree Yorkshire Ltd | Hospitality | 2016 |
| TWW Engineering Ltd | Professional & scientific | 2026 |
| Tylor Booze Shop Ltd | Wholesale & retail | 2019 |