| Tockwith MOT Centre Limited | Wholesale & retail | 2015 |
| Tockwith Profile Cutting Limited | Professional & scientific | 1978 |
| Together Developments Limited | Extraterritorial | 2013 |
| Together Maintenance Limited | Extraterritorial | 2013 |
| Toilet Buddie Limited | Extraterritorial | 2018 |
| Tomfools Ltd | Hospitality | 2022 |
| Tommy Banks Productions Ltd | Information & communication | 2025 |
| Toogood Estates Limited | Real estate | 2021 |
| Toolbox Drama CIC | Arts & recreation | 2021 |
| Top Road (Leasing) Limited | Professional & scientific | 1995 |
| Topaz (London) Limited | Real estate | 2013 |
| Torchlight Wellbeing Ltd | Other services | 2017 |
| Toros Research and Insight Ltd | Professional & scientific | 2022 |
| Touch Telecommunications Limited | Information & communication | 2014 |
| Touchwood of Wetherby Ltd | Wholesale & retail | 2003 |
| TP Professional Services Ltd | Professional & scientific | 2010 |
| Tractor Creative Ltd | Professional & scientific | 2021 |
| Training at Work Group Ltd | Education | 2018 |
| Transform MED Tech Consultancy Ltd | Administrative & support | 2023 |
| Transitions York CIC | Education | 2015 |
| Travel Kinship Ltd | Professional & scientific | 2022 |
| Tree Care Company (Yorkshire) Limited | Agriculture & fishing | 2015 |
| TRI Fit Athletic Ltd | Wholesale & retail | 2019 |
| Triangle Property Solutions Limited | Real estate | 2016 |
| Trilandium Developments LLP | | 2011 |
| Trilandium Estates Limited | Construction | 2010 |
| Triton Consortium Ltd | Financial services | 2024 |
| Triton Group Holdings Ltd | Financial services | 2013 |
| Triton Group of Companies Ltd | Financial services | 2020 |
| Triton Recruitment Ltd | Administrative & support | 2013 |
| Triton Risk Management Ltd | Professional & scientific | 2018 |
| Triton Security & Facilities Management Limited | Administrative & support | 2003 |
| Triton Studio Solutions Ltd | Construction | 2024 |
| Tritontrak Holdings Limited | Financial services | 2022 |
| Tritontrak Limited | Administrative & support | 2019 |
| Trla Investments Limited | Financial services | 2022 |
| True Divorce Consultancy Ltd | Professional & scientific | 2023 |
| True Financial Design Ltd | Professional & scientific | 2018 |
| True Personal Training Guiseley Ltd | Other services | 2022 |
| True Personal Training Ltd | Other services | 2018 |
| Truepb Ltd | Information & communication | 2026 |
| Turner Logistics (Halifax) Limited | Transport & logistics | 2007 |
| Turnpike Coffee Ltd | Hospitality | 2024 |
| Twenty Seven Gifts Limited | Wholesale & retail | 2021 |
| Twisted Digital Limited | Information & communication | 2015 |
| Two Plus Five Limited | Real estate | 2019 |
| Two Tone Production Limited | Other services | 2022 |
| TYA GRP Ltd | Professional & scientific | 2024 |
| Tycc LLP | | 2021 |
| Type in Motion Limited | Information & communication | 2000 |
| Typhoon Abrasives Limited | Wholesale & retail | 2025 |
| Tyszyk and Ballester Holdings Limited | Real estate | 2024 |
| Ua-Connect Limited | Wholesale & retail | 2016 |
| Ugly Frog Limited | Professional & scientific | 2016 |
| UK Ratchet Straps Limited | Wholesale & retail | 2018 |
| UK Refurbs Ltd | Construction | 2008 |
| UK Trade Cars Limited | Wholesale & retail | 2013 |
| Ukind Therapy CIC | Information & communication | 2024 |
| Uktesla Limited | Wholesale & retail | 2024 |
| Ultralight Superstrong Ltd | Arts & recreation | 2014 |
| Ultrasonic Cleaning Services (U.K.) Limited | Manufacturing | 1975 |
| Undique Limited | Information & communication | 2019 |
| United by Design Limited | Professional & scientific | 2007 |
| Unsworth Executive Services Ltd | Professional & scientific | 2005 |
| Unveiled Group Ltd | Information & communication | 2013 |
| Uofh Ltd | Wholesale & retail | 2017 |
| UP Digital Marketing Limited | Professional & scientific | 2019 |
| Upsized CIC | Wholesale & retail | 2025 |
| Upton PUB Company Ltd | Hospitality | 2024 |
| Urban Myth Solutions Ltd | Construction | 2017 |
| Urbanite (York) Limited | Construction | 2017 |
| Urbanite Living Limited | Real estate | 2017 |
| Valour Consulting Limited | Professional & scientific | 2020 |
| Value Plant Machinery Ltd | Wholesale & retail | 2017 |
| Vanquish Assets Ltd | Wholesale & retail | 2019 |
| Vantage Research Limited | Professional & scientific | 2009 |
| Vape Centre Wetherby Ltd | Wholesale & retail | 2017 |
| Vastec Automotive Ltd | Wholesale & retail | 2026 |
| Venicevinpro Ltd | Wholesale & retail | 2025 |
| Venture Surgical Ltd | Health & social care | 2024 |
| Verdant Electrical Ltd | Construction | 2022 |
| Veritass Property Limited | Real estate | 2015 |
| Vertex Retailing Ltd | Wholesale & retail | 2026 |
| Verto Recycle Ltd | Water & waste | 1997 |
| Verto VIS LLP | | 2013 |
| Vicki Cockroft Interiors Limited | Other services | 1997 |
| Victory Graphics (Holdings) Limited | Manufacturing | 2013 |
| Viking EHS Ltd | Professional & scientific | 2024 |
| Vino Coco Ltd | Wholesale & retail | 2021 |
| Vintage Vera Clothing Ltd | Wholesale & retail | 2019 |
| Vintro Paint Limited | Manufacturing | 2015 |
| Virgis Filter Sales & Marketing Limited | Transport & logistics | 2001 |
| Virtu Properties Ltd | Construction | 2018 |
| Visworks Limited | Professional & scientific | 2015 |
| Vita Referrals Site 01 Ltd | Professional & scientific | 2023 |
| Viva Homes Group Holdings Ltd | Professional & scientific | 2011 |
| Vivid North Limited | Information & communication | 2014 |
| Vivienne Brown Ltd | Professional & scientific | 2022 |
| Vortex (Yorkshire) Ltd | Real estate | 2011 |
| W and J a Bishop Limited | Health & social care | 2002 |