| Womencentre Limited | Real estate | 2007 |
| Wonderland - Tattoo & Piercing Ltd | Other services | 2018 |
| Wood (Rent-A-Home) Limited | Real estate | 1975 |
| Woodside Court Management Company (Normanton) Limited | Real estate | 2007 |
| Woodsley Road Multicultural Community Centre | Health & social care | 2006 |
| Woolley & Thorpe Limited | Transport & logistics | 1962 |
| Woolsafe Ltd | Professional & scientific | 2002 |
| Word World Ltd | Other services | 2004 |
| Wrapid Manufacturing Limited | Manufacturing | 1998 |
| Write Design & Print Limited | Manufacturing | 2005 |
| WS Windows & Conservatories Limited | Construction | 2007 |
| X.L.Properties(Brighouse)Limited | Manufacturing | 1943 |
| Xamax Clothing Company Limited | Manufacturing | 2001 |
| Ynotdata Limited | Information & communication | 2025 |
| Yongheng Limited | Hospitality | 2024 |
| Yorkline (White Lining Services) Limited | Construction | 2007 |
| Yorkshire Bespoke Timber Ltd | Manufacturing | 2022 |
| Yorkshire Design Developments Limited | Real estate | 1989 |
| Yorkshire Displays Limited | Wholesale & retail | 2005 |
| Yorkshire Photonic Technology Limited | Manufacturing | 2006 |
| Yorkshire Plumb Supplies Ltd | Wholesale & retail | 2006 |
| Yorkshire Sculpture Park | Arts & recreation | 1998 |
| Yorkshire Tree Contractors Limited | Agriculture & fishing | 2003 |
| Your Company Limited | Professional & scientific | 2001 |
| Yoyo Laos Sauce Ltd | Manufacturing | 2022 |
| YPS Valves Limited | Manufacturing | 1977 |
| Yvonne Goodwin Wealth Management Limited | Administrative & support | 2007 |
| Zahid Ahmed Ltd | Real estate | 2003 |
| Zaitun Limited | Wholesale & retail | 2007 |
| Zanbeel PVT Ltd | Wholesale & retail | 2023 |
| Zanko Barber Ltd | Other services | 2023 |
| Zenithalpha Limited | Hospitality | 2003 |
| Zenithwave Technologies Ltd | Wholesale & retail | 2025 |
| Zenixoworld. Ltd | Wholesale & retail | 2024 |
| Zennylight Partners Ltd | Wholesale & retail | 2025 |
| Zero Zero One Limited | Arts & recreation | 1998 |
| ZSG Accountancy Ltd | Professional & scientific | 2004 |