| THE Prestige Resin Company (Yorkshire) Limited | Construction | 2026 |
| THE Reed Asset Company Limited | Real estate | 2016 |
| THE Reed Partnership Ltd | Administrative & support | 2002 |
| THE Specialist Menopause Clinic Ltd | Health & social care | 2024 |
| THE Stables Hunmanby Limited | Households | 2000 |
| THE Stella Group Ltd | Financial services | 2021 |
| THE Strategy Exchange Limited | Professional & scientific | 2012 |
| THE Tipsy Toad Bar Company Ltd | Hospitality | 2019 |
| THE Tipsy Toad Hospitality Company Ltd | Hospitality | 2020 |
| THE Vinery Limited | Hospitality | 2026 |
| THE Whistling Kettle Tea Room Ltd | Hospitality | 2023 |
| THE White Gate (Mirfield) Ltd | Hospitality | 2025 |
| THE Woodland Gift Company Ltd | Wholesale & retail | 2017 |
| THE Yorkshire Property Guide Ltd | Information & communication | 2009 |
| Think Design Interiors Limited | Professional & scientific | 2012 |
| Threedom Solutions Limited | Professional & scientific | 2009 |
| Tier Property Ltd | Real estate | 2022 |
| Tiger Skip Hire Ltd | Water & waste | 2017 |
| Tina Egan HE Consulting Ltd | Professional & scientific | 2025 |
| Titanic Projects Limited | Construction | 2008 |
| TK Creative Ltd | Professional & scientific | 2022 |
| TO Have and to Hold Bridalwear Ltd | Wholesale & retail | 2016 |
| TOR Engineering Services Ltd | Professional & scientific | 2024 |
| Total E Solutions Asset Management Limited | Real estate | 2021 |
| Total E-Solutions (Consulting) Limited | Information & communication | 2003 |
| Townberry Properties Ltd | Construction | 2020 |
| Trapezoid Limited | Professional & scientific | 2011 |
| Travellers Rest Wakefield Ltd | Hospitality | 2025 |
| Tream Clothing Ltd | Wholesale & retail | 2024 |
| Tree and Bees Ltd | Manufacturing | 2022 |
| Treen Management Ltd | Households | 2016 |
| Trendwayve Limited | Wholesale & retail | 2024 |
| Trent Taverns Limited | Hospitality | 2024 |
| Trett Group Limited | Financial services | 2026 |
| Trett Labs Limited | Information & communication | 2026 |
| Trinity Court (Wallington) Management Company Limited | Households | 2004 |
| True North Tackle Store Limited | Wholesale & retail | 2025 |
| Truehr Ltd. | Professional & scientific | 2016 |
| Tuesday Consulting Ltd | Professional & scientific | 2022 |
| Tyneside Flock Company,Limited(The) | Extraterritorial | 1914 |
| UK Carriage Masters Ltd | Other services | 2026 |
| UK Surgeon Limited | Health & social care | 2008 |
| Ukpetsupplies Ltd | Wholesale & retail | 2010 |
| UMR Trading Ltd | Other services | 2021 |
| Unicolour Limited | Manufacturing | 1984 |
| Untemax Limited | Wholesale & retail | 2019 |
| Urban Hybrid Architecture Limited | Professional & scientific | 2008 |
| Urban Hybrid Limited | Professional & scientific | 2007 |
| Ushi Group Holdings Limited | Financial services | 2019 |
| Ushiwear Clothing Limited | Administrative & support | 1990 |
| Valor Management Limited | Administrative & support | 2016 |
| Varley Jointing Services Ltd | Professional & scientific | 2023 |
| Viola Healthcare Limited | Health & social care | 2022 |
| Visual Effect Conservatories Limited | Construction | 2005 |
| Vitellus Limited | Professional & scientific | 2021 |
| VT Ventures Three Limited | Construction | 2018 |
| W N Properties Limited | Real estate | 2005 |
| Warmauk Ltd | Construction | 2020 |
| WAX Limited | Financial services | 2005 |
| Waxwing Print UK Limited | Information & communication | 2024 |
| WB Joinery Services Limited | Construction | 2016 |
| Weldsumable Limited | Wholesale & retail | 2017 |
| WES NO 4 Limited | Energy | 2022 |
| West Yorkshire Groundworks Ltd | Construction | 2019 |
| West Yorkshire Print Workshop | Arts & recreation | 2010 |
| WF14 Electrical and Property Solutions Limited | Construction | 2014 |
| WG Homes Limited | Real estate | 2024 |
| WG Managment Services Limited | Professional & scientific | 2021 |
| Wheatley Park Management Ltd | Real estate | 2017 |
| Whirlwind Energy Storage Limited | Real estate | 2019 |
| WI' Scraps Ltd | Extraterritorial | 1996 |
| Wi'Bits Ltd | Real estate | 1995 |
| Wila Transport Logistics Limited | Transport & logistics | 2011 |
| Wilcock and Co Limited | Real estate | 2014 |
| Willow Bay Home & Garden Limited | Wholesale & retail | 2016 |
| Wilson's Republic CIC | Administrative & support | 2020 |
| WIN Solicitors Limited | Professional & scientific | 2017 |
| Window and Door Centre Limited | Construction | 2020 |
| Wizekap CIC | Education | 2025 |
| WOK Kitchen (Leeds) Ltd | Hospitality | 2017 |
| WOK Kitchen (Manchester) Ltd | Hospitality | 2017 |
| Woodbank Estates Limited | Construction | 2022 |
| Work.Office.Business. Ltd | Wholesale & retail | 2015 |
| Worldbase Limited | Manufacturing | 2009 |
| Wowy Ltd | Hospitality | 2026 |
| WRE Broomhill Limited | Real estate | 2022 |
| WRE Lyndhurst Limited | Real estate | 2019 |
| WRE West Boldon Limited | Extraterritorial | 2025 |
| Wright Consulting Ltd | Professional & scientific | 2024 |
| Wyke Plastics Limited | Manufacturing | 2012 |
| WYL Properties Ltd | Real estate | 2018 |
| Wyld and Coco Ltd | Wholesale & retail | 2024 |
| Xcho Limited | Information & communication | 2026 |
| XZP Limited | Financial services | 2026 |
| Yorkshire and Humberside Regional Technology Network | Administrative & support | 1989 |
| Yorkshire Homecare Plumbing & Heating Ltd | Construction | 2025 |
| Yorkshire Makers Ltd | Wholesale & retail | 2024 |
| Yorkshire Sporting Guns Limited | Wholesale & retail | 2004 |
| Yorkshire Stone Dresser Media Ltd | Manufacturing | 2026 |
| Yorkshireripz Ltd | Wholesale & retail | 2025 |