| WJB Property Management Ltd | Households | 2026 |
| WJS UK Limited | Wholesale & retail | 2004 |
| WM1 Estate Management Limited | Real estate | 2016 |
| Wong YIP Accounting Limited | Professional & scientific | 2023 |
| Woodlands 62 Ltd | Hospitality | 2023 |
| Woodview Projects Limited | Construction | 2009 |
| Word Creative Consulting Limited | Administrative & support | 2010 |
| Word of Goddard Limited | Professional & scientific | 2023 |
| Wordsmiths UN Limited | Professional & scientific | 2011 |
| Work From Paradise Limited | Administrative & support | 2025 |
| Workout Megastore Ltd | Wholesale & retail | 2026 |
| Workwear Your Way Limited | Wholesale & retail | 2016 |
| World Sourcing Consultancy Limited | Professional & scientific | 2013 |
| World Wide Consultancy Limited | Administrative & support | 2017 |
| Worldwide Imports Direct Limited | Wholesale & retail | 1999 |
| Wothersome Limited | Administrative & support | 2013 |
| Wright Truck Limited | Wholesale & retail | 2010 |
| Wrixle Ltd | Professional & scientific | 2018 |
| WTM (1217) Limited | Professional & scientific | 2016 |
| Wysiwyg Design & Marketing Limited | Professional & scientific | 2013 |
| Xperience Unlimited Global Limited | Wholesale & retail | 2025 |
| Xperience Unlimited Group Limited | Financial services | 2023 |
| XTR Holding Limited | Professional & scientific | 2015 |
| YDY Coaching Ltd | Professional & scientific | 2023 |
| YDY Hub Ltd | Information & communication | 2025 |
| YE Old Black BOY Ltd | Hospitality | 2019 |
| Yellow Marine Consultancy Ltd | Wholesale & retail | 2012 |
| YLA Investments Ltd | Other services | 2017 |
| YO8 Limited | Professional & scientific | 2023 |
| York Bespoke Bathrooms Limited | Construction | 2013 |
| York Classic Car Storage Limited | Transport & logistics | 2015 |
| York Photo Litho Limited | | 1981 |
| Yorkshire & Cambridgeshire Investments Ltd | Hospitality | 2025 |
| Yorkshire & Cambridgeshire Management LLP | | 2025 |
| Yorkshire Colour Works Ltd | Manufacturing | 2023 |
| Yorkshire Eco Packaging Company Ltd | Administrative & support | 2025 |
| Yorkshire Electric Gates Limited | Construction | 2003 |
| Yorkshire Farmhouse Furniture Limited | Manufacturing | 2014 |
| Yorkshire Financial Management Limited | Professional & scientific | 1996 |
| Yorkshire Health and Wellness Doctor Limited | Professional & scientific | 2019 |
| Yorkshire Lean Meat Ltd | Wholesale & retail | 2015 |
| Yorkshire Location Services Limited | Information & communication | 2011 |
| Yorkshire Marketing Consultants Ltd | Professional & scientific | 2019 |
| Yorkshire Metal Services Limited | Manufacturing | 2000 |
| Yorkshire Oak Frames Limited | Construction | 2008 |
| Yorkshire Performance Limited | Wholesale & retail | 2023 |
| Yorkshire Roller Disco Limited | Arts & recreation | 2026 |
| Yorkshire Rose Financial Planning Ltd | Financial services | 2017 |
| Yorkshire Street Furniture Ltd | Manufacturing | 2015 |
| Yorkstone Property Investment Holdings Ltd | Real estate | 2024 |
| Yorkstone Property Solutions Ltd | Real estate | 2024 |
| Your Home Help Ltd | Health & social care | 2025 |
| Your Metal Store Limited | Wholesale & retail | 2004 |
| YP Real Estate Limited | Real estate | 2013 |
| Ypdp Ltd | Health & social care | 2018 |
| ZB Coaching Ltd | Arts & recreation | 2025 |
| Zeco Energy Limited | Information & communication | 2012 |
| Zeco Holdings Limited | Financial services | 2022 |
| Zeki Consulting Group Ltd | Information & communication | 2021 |
| Zey&Li Ltd | Hospitality | 2025 |
| Zion International Trading Company Limited | Wholesale & retail | 2025 |
| Zoar Street Developments Limited | Real estate | 2006 |
| ZT Solutions Ltd | Other services | 2015 |
| Zuna Group Ltd | Wholesale & retail | 2026 |