| Williams Finance Limited | Financial services | 2008 |
| Willow House Accounting Limited | Professional & scientific | 2016 |
| Willwood Developments Ltd | Real estate | 2012 |
| WNU20 Limited | Construction | 2018 |
| Woodhouse Environmental Services Limited | Energy | 2008 |
| Woodlands (Bramhope) Management Company Limited | Households | 1993 |
| Woodlll Limited | Transport & logistics | 2025 |
| Woodman Investments Limited | Financial services | 2026 |
| Wooshk Ltd | Professional & scientific | 2018 |
| Word UP North Limited | Arts & recreation | 1972 |
| Workforce Solutions (ENG) Ltd | Administrative & support | 2021 |
| Worrall & Worrall Ltd | Professional & scientific | 2016 |
| Worrall & Worrall Property Limited | Real estate | 2017 |
| WPM Energy Engineering Ltd | Professional & scientific | 2020 |
| Wrapped in Faith (Properties) Limited | Real estate | 2025 |
| Wright Casa Ltd | Construction | 2026 |
| Wright VA Ltd | Administrative & support | 2019 |
| WSI (Bradford) Limited | Hospitality | 2018 |
| WY Dog Wash Ltd | Other services | 2024 |
| X-Pert Coaching Ltd | Professional & scientific | 2013 |
| XO Fitness Ltd | Arts & recreation | 2021 |
| XT Consulting Limited | Professional & scientific | 2003 |
| YAP Films (UK) Limited | Information & communication | 2002 |
| Yardsale SKI Ltd | Wholesale & retail | 2025 |
| Yeveley Homes Limited | Real estate | 2021 |
| YFX Consulting Ltd | Professional & scientific | 2025 |
| Yorkshare Ltd | Financial services | 2025 |
| Yorkshire Adventure Company Limited | Extraterritorial | 2019 |
| Yorkshire Autodrome Limited | Professional & scientific | 2014 |
| Yorkshire Digs Ltd | Households | 2023 |
| Yorkshire Flower Essences Ltd | Manufacturing | 2016 |
| Yorkshire Gender Endocrinology Services Limited | Health & social care | 2026 |
| Yorkshire Hot Tubs Ltd | Wholesale & retail | 2009 |
| Yorkshire Motorcycles Limited | Wholesale & retail | 2026 |
| Yorkshire Runner Limited | Wholesale & retail | 2015 |
| Yorkshire Sprinklers Ltd | Administrative & support | 2010 |
| Yorkstone Asset Development Management Limited | Professional & scientific | 2018 |
| Yorkstone Derwenthorpe Limited | Extraterritorial | 2025 |
| Yorkstone Developments Limited | Financial services | 2024 |
| Yorkstone Homes Limited | Construction | 2024 |
| Yorkstone Morley Limited | Construction | 2024 |
| Youco Solutions Ltd | Construction | 2023 |
| Zapet Homes Limited | Real estate | 2025 |
| ZBS Construction Limited | Construction | 2016 |
| ZBS Properties Ltd | Real estate | 2018 |
| Zentreat Limited | Real estate | 2025 |
| Zepplin Transport Services Limited | Wholesale & retail | 2018 |
| Zeta Developments Ltd | Real estate | 2000 |
| ZHK Properties Ltd | Real estate | 2025 |
| Zico Automotive Limited | Wholesale & retail | 2013 |
| Zmart Solutions Limited | Information & communication | 2015 |