| Wordsworth Crushing Limited | Construction | 2003 |
| Wordsworth Excavations Holdings Limited | Financial services | 2022 |
| Wordsworth Excavations Limited | Construction | 2003 |
| Wordsworth Property Developments Ltd | Construction | 2023 |
| Worktop Hive Limited | Wholesale & retail | 2025 |
| World Agriculture Limited | Information & communication | 2018 |
| World of Windows (Yorkshire) Limited | Construction | 2007 |
| World Rail Atlas Limited | Information & communication | 2005 |
| Worldimaging Ltd | Professional & scientific | 2019 |
| Worsbro Motor Spares Limited | Wholesale & retail | 2011 |
| Worsbrough Common Community Association Limited | Health & social care | 2004 |
| Worsbrough Common Football Club | Arts & recreation | 2013 |
| Worsbrough Common Rising Stars Daycare | Education | 2016 |
| Worsbrough Road 1972 Limited | Extraterritorial | 2014 |
| Worsbrough Sports and Development Association | Other services | 2002 |
| Worth Polythene Limited | Wholesale & retail | 1984 |
| Wortley Court Management Limited | Households | 2002 |
| Wosskow Brown Legal Services Limited | Administrative & support | 2015 |
| WOW (Yorks) Ltd | Construction | 2024 |
| WOW Bubbles Barnsley Ltd | Hospitality | 2025 |
| WOW Bubbles Limited | Hospitality | 2021 |
| WOW Comix Ltd. | Wholesale & retail | 2020 |
| WOW Garage Ltd | Wholesale & retail | 2026 |
| WOW Leeds Limited | Wholesale & retail | 2019 |
| Wqss Consultancy Ltd | Professional & scientific | 2024 |
| Wraggs to Riches Ltd | Real estate | 2021 |
| Wray Fabrications Ltd | Manufacturing | 2006 |
| Wright Bros Properties Limited | Real estate | 2015 |
| Wright Estate Group Ltd | Real estate | 2025 |
| Wright Way Reinstatement & Driveways Ltd | Construction | 2024 |
| Wrightway Utility Services Ltd | Construction | 2026 |
| Wroe Courier Services Ltd | Transport & logistics | 2020 |
| Wroe's Roofing Services Ltd | Construction | 2025 |
| WSC Holdings Limited | Financial services | 2023 |
| WSD Utilities Ltd | Construction | 2021 |
| WSJ Transport Limited | Transport & logistics | 2018 |
| WSS Enterprise Limited | Real estate | 2017 |
| WTC Yorkshire Limited | Construction | 2014 |
| WVN Workforce Ltd | Administrative & support | 2026 |
| WW Roofclad Limited | Construction | 2023 |
| Wyatt Coaches Ltd | Wholesale & retail | 2007 |
| Wylex Limited | Real estate | 2017 |
| Wyze Group Limited | Professional & scientific | 2018 |
| X Kitchens Ltd | Manufacturing | 2025 |
| X2AG Limited | Manufacturing | 2011 |
| X5 Machinery Ltd | Wholesale & retail | 2018 |
| Xcadia Limited | Information & communication | 2026 |
| Xeinadin Barnsley Limited | Professional & scientific | 2011 |
| Xenia Medical Limited | Wholesale & retail | 2025 |
| Xeraxon Care Ltd | Information & communication | 2024 |
| Xircular Ltd | Extraterritorial | 2014 |
| XMP Ltd | Real estate | 2009 |
| Xpert Travel Ltd | Administrative & support | 2016 |
| Xpress Building Yorkshire Ltd | Construction | 2025 |
| Xpress Cleaning Services Ltd | Administrative & support | 2024 |
| Xtra Mile Transport Ltd | Transport & logistics | 2021 |
| Xtraflex Limited | Manufacturing | 2006 |
| Xtreme Cladding Contractors Ltd | Construction | 2020 |
| Xtreme Construction Yorkshire Limited | Construction | 2021 |
| Y D Healthcare Limited | Administrative & support | 2010 |
| Y'Olde Renovations and Rentals Ltd | Real estate | 2026 |
| Y'Olde Window Cleaning Ltd | Administrative & support | 2026 |
| Yami Barnsley Limited | Hospitality | 2026 |
| Yanakiev Limited | Health & social care | 2025 |
| Yanis Trans Logistics Ltd | Transport & logistics | 2026 |
| Yanis&Maya Ltd | Transport & logistics | 2018 |
| Yardworx Ltd | Wholesale & retail | 2023 |
| Yates Drywall Ltd | Construction | 2012 |
| YDL Holdings Limited | Financial services | 2023 |
| YE Food Ltd | Hospitality | 2025 |
| YEA Consulting Limited | Professional & scientific | 2019 |
| Yellow Duck Development Ltd | Other services | 2012 |
| Yemlad Care Limited | Health & social care | 2022 |
| YES Please Limited | Real estate | 2004 |
| YES That Counts Ltd | Professional & scientific | 2022 |
| Yevu Consultants Limited | Professional & scientific | 2016 |
| Yews Lane Food & Wine Limited | Wholesale & retail | 2009 |
| YG Investment Group Ltd | Other services | 2019 |
| YGI M&E Limited | Construction | 2013 |
| Yieldfirst Ltd | Real estate | 2026 |
| Yieldform Contractors Limited | Construction | 1993 |
| YIN Ltd | Administrative & support | 2017 |
| York Lift Trucks Limited | Manufacturing | 1998 |
| Yorkshire 247 GAS Limited | Construction | 2025 |
| Yorkshire Bays Ltd | Construction | 2024 |
| Yorkshire Blankets Limited | Wholesale & retail | 2019 |
| Yorkshire Business Systems Limited | Information & communication | 2001 |
| Yorkshire Central Ltd | Wholesale & retail | 2024 |
| Yorkshire Chippy Ltd | Hospitality | 2025 |
| Yorkshire Coast Living Limited | Construction | 2021 |
| Yorkshire Coast Living Management Company Limited | Real estate | 2025 |
| Yorkshire Cockney Trading Limited | Wholesale & retail | 2026 |
| Yorkshire Computer Services Limited | Manufacturing | 2016 |
| Yorkshire Conservatories Ltd | Construction | 2012 |
| Yorkshire Cyber CIC | Other services | 2021 |
| Yorkshire Developments Building Contractors Ltd | Construction | 2013 |
| Yorkshire Dressage Ltd | Arts & recreation | 2022 |
| Yorkshire Eco Assessment Ltd | Professional & scientific | 2025 |
| Yorkshire Electric and Plumbing Limited | Construction | 2013 |
| Yorkshire Electrical Compliance Ltd | Construction | 2026 |