| THE JAD Group (Yorkshire) Ltd | Financial services | 2025 |
| THE Jenny Wren at Beal Ltd | Hospitality | 2021 |
| THE Kyori Group Ltd | Professional & scientific | 2024 |
| THE Landings (Hook) Management Company Limited | Households | 2010 |
| THE Laser Station Ltd | Wholesale & retail | 2022 |
| THE Mahoney Hair Company Ltd | Other services | 2011 |
| THE Millhouse Bistro Limited | Hospitality | 2026 |
| THE Northern Centre for Mindfulness and Compassion Ltd | Health & social care | 2004 |
| THE Other Consultants Ltd | Professional & scientific | 2017 |
| THE PAL Network Limited | Wholesale & retail | 2020 |
| THE PIG Inn & the Peppered PIG Limited | Hospitality | 2025 |
| THE Portington Trading Company Limited | Real estate | 2006 |
| THE Skin Theory Yorkshire Ltd | Other services | 2026 |
| THE Two Butchers Ltd | Wholesale & retail | 2024 |
| THE Verde Project Ltd | Agriculture & fishing | 2025 |
| THE Vikings Foundation CIC | Education | 2023 |
| THE Wander Inn Ltd | Hospitality | 2022 |
| THE Wheatsheaf Laughing Lounge Ltd | Hospitality | 2025 |
| THE Woofy Wash Ltd | Administrative & support | 2025 |
| THE Yorkshire Timber Company Limited | Manufacturing | 2020 |
| Theluxelab Ltd | Other services | 2024 |
| Thermocool Solutions Ltd | Construction | 2014 |
| Thinking Anglers Limited | Wholesale & retail | 2004 |
| Thompson Clark Ltd | Real estate | 2023 |
| Thorne Boat Services Ltd | Manufacturing | 2025 |
| Thorpe Eco Ltd | Construction | 2014 |
| Three Swans Group Limited | Professional & scientific | 2025 |
| THS Traders Limited | Construction | 2021 |
| Tilda Properties Limited | Real estate | 2025 |
| TIM Leighton Limited | Professional & scientific | 2017 |
| TIM Lewis Limited | Agriculture & fishing | 2016 |
| Timbergate Holdings Limited | Extraterritorial | 2022 |
| Titor First Choice Limited | Hospitality | 2025 |
| Tjax Ltd | Construction | 2023 |
| TJH Joinery Ltd | Extraterritorial | 2017 |
| Tjrw Contracting Services Ltd | Financial services | 2013 |
| Tlax Property Ltd | Real estate | 2019 |
| TLJ Joinery & Building Contractors Limited | Construction | 2017 |
| TMW Limited | Real estate | 2016 |
| To'Rera Foods Ltd | Wholesale & retail | 2026 |
| TOM Chambers Limited | Manufacturing | 1977 |
| TOM Parkinson Services Ltd | Manufacturing | 2012 |
| Tool Box Leeds Ltd | Wholesale & retail | 2017 |
| Top Hand Car Wash 1 Ltd | Administrative & support | 2025 |
| Top Notch Timber Ltd. | Manufacturing | 2017 |
| Total Beauty & Laser Clinic Ltd | Other services | 2026 |
| Total Property Developers Ltd | Real estate | 2020 |
| Total Property Sourcing Ltd | Real estate | 2020 |
| Total System Engineering Ltd | Professional & scientific | 2023 |
| Total-Applications Ltd | Information & communication | 2014 |
| Touchstone Investments (GB) Limited | Construction | 2002 |
| Townends Accountants Limited | Professional & scientific | 2006 |
| Townends Accountants LLP | | 2011 |
| Townends Wealth Management Limited | Financial services | 2004 |
| Towngate Plumbing Ltd | Construction | 2022 |
| Townstrip Ltd | Hospitality | 2023 |
| Traffic Assist Limited | Extraterritorial | 2012 |
| Traffic Labour Supplies (Holdings) Ltd | Manufacturing | 2011 |
| Traffic Labour Supplies Ltd | Public administration | 2010 |
| Traffic Management DP123 Ltd | Construction | 2023 |
| Trailaway LLP | | 2013 |
| Training-Pays Limited | Education | 1999 |
| Tramps With Stamps Limited | Wholesale & retail | 2014 |
| Trattoria 34 Ltd | Hospitality | 2025 |
| Trebro Sales (UK) Ltd | Wholesale & retail | 2021 |
| Trendy GAL Clothing Ltd | Wholesale & retail | 2023 |
| Triumph Properties Limited | Real estate | 2015 |
| TRK Services Ltd | Transport & logistics | 2018 |
| Trojak Transport Ltd | Transport & logistics | 2018 |
| Tropical Tides Travel Limited | Administrative & support | 2025 |
| TRU Group Limited | Manufacturing | 1994 |
| Tru-Back (UK) Limited | Manufacturing | 1998 |
| Trust and Estate Planning Services Ltd | Financial services | 2009 |
| TSG Terminal Limited | Transport & logistics | 2014 |
| Turboqual Ltd | Professional & scientific | 2022 |
| Turnbridge 4X4, Commercial, Sports and Prestige Vehicles Ltd. | Extraterritorial | 2020 |
| Turnbridge Autos Ltd | Wholesale & retail | 2020 |
| Turnbridge Properties Limited | Real estate | 2022 |
| Turnkey Changing Places Limited | Construction | 2025 |
| Twentu Services Limited | Information & communication | 2026 |
| Twenty Nine Retail Limited | Wholesale & retail | 2017 |
| Two Headed Duck Translation Ltd | Information & communication | 2020 |
| Tykes Property Limited | Real estate | 2016 |
| TYR Fitness & Nutrition Limited | Arts & recreation | 2018 |
| Tyvm Limited | Real estate | 2018 |
| U Phone Mobile &Vapes Limited | Wholesale & retail | 2026 |
| Ultimate Windows & Doors Yorkshire Ltd | Manufacturing | 2022 |
| Ultra Hillier Ltd | Wholesale & retail | 2020 |
| Underworldunderwear Limited | Wholesale & retail | 2008 |
| Union Street Management Limited | Households | 1994 |
| Uniqema Limited | Professional & scientific | 1997 |
| Uniqema UK Limited | Professional & scientific | 1919 |
| Unique Art Corp Ltd | Arts & recreation | 2016 |
| Unique Paints Limited | Wholesale & retail | 2011 |
| Unique Spaces Northern Ltd | Construction | 2022 |
| Universal Bingham Limited | Wholesale & retail | 2001 |
| Universal Renewables (O+M) Ltd | Construction | 2015 |
| Uphone Mobile Limited | Wholesale & retail | 2024 |
| V. D. Hanna Ltd | Administrative & support | 2015 |
| Valedi Ltd | Construction | 2015 |