| Yolunda AS Ltd | Wholesale & retail | 2025 |
| Yomol Limited | Real estate | 2025 |
| York Fashion Week Ltd | Administrative & support | 2021 |
| Yorkshire Asset Finance Limited | Financial services | 2009 |
| Yorkshire Coins Ltd | Wholesale & retail | 2025 |
| Yorston Management Ltd | Professional & scientific | 2016 |
| Yossyferry Ltd | Wholesale & retail | 2025 |
| Youll Construction Ltd | Construction | 2007 |
| Young & Bethell Construction Ltd | Construction | 2024 |
| Young at Heart ULO C.I.C. | Health & social care | 2022 |
| Young Farrell Limited | Transport & logistics | 2015 |
| Young Welch Investments Limited | Financial services | 2025 |
| Your Care Matters to US Ltd | Public administration | 2025 |
| Your Home Lettings (NE) Limited | Real estate | 2016 |
| Your Travel Consultant Group Ltd | Information & communication | 2024 |
| Your Travel Consultant Ltd | Information & communication | 2024 |
| Yourhomepd Ltd | Construction | 2025 |
| Youxpro Limited | Wholesale & retail | 2025 |
| YS Laboratories Ltd | Wholesale & retail | 2026 |
| YU Enterprises Ltd | Health & social care | 2025 |
| Z a Rashid Ltd | Health & social care | 2016 |
| Z4INDUSTRIES Ltd | Information & communication | 2019 |
| Zahuts Burgers Ltd | Hospitality | 2022 |
| Zaifar Limited | Real estate | 2015 |
| Zekko Golf Ltd | Information & communication | 2026 |
| ZEN Limited | Financial services | 2022 |
| ZEN UK Holdings Ltd | Financial services | 2022 |
| ZEN UK Limited | Hospitality | 2008 |
| Zenica Limited | Wholesale & retail | 2022 |
| Zenith Edge Enterprises Ltd | Wholesale & retail | 2025 |
| Zenithb Limited | Administrative & support | 2023 |
| Zensphere Group Ltd | Wholesale & retail | 2022 |
| Zeynep Anzerlioglu Ltd | Wholesale & retail | 2024 |
| ZH Ventures Ltd | Financial services | 2026 |
| Zheng BTL Ltd | Real estate | 2022 |
| ZINC1 Ltd | Real estate | 2013 |
| Zingcommerce Ltd | Wholesale & retail | 2025 |
| ZLO Store Ltd | Wholesale & retail | 2025 |
| Zora Skin and Aesthetics Group Ltd | Other services | 2026 |
| ZSI Fibre Ltd | Information & communication | 2024 |
| Zukart Limited | Wholesale & retail | 2026 |
| Zulu Residences Ltd | Real estate | 2024 |
| ZW Services Ltd | Administrative & support | 2024 |
| Zzzebraaa Limited | Wholesale & retail | 2023 |