| Xpertise Ltd | Health & social care | 2017 |
| XS Stock Deals Ltd | Wholesale & retail | 2021 |
| Y9 Ltd | Wholesale & retail | 2025 |
| Yahye ALI Ltd | Real estate | 2022 |
| Yarmook Ltd | Wholesale & retail | 2024 |
| Yasir Services Ltd | Wholesale & retail | 2024 |
| YC Media Services Ltd | Professional & scientific | 2019 |
| YDA Vehicles Ltd | Wholesale & retail | 2025 |
| YF Smile Ltd | Health & social care | 2015 |
| YHM Holdings Ltd | Real estate | 2021 |
| YHY Properties Limited | Real estate | 2025 |
| YIP Properties Limited | Real estate | 2016 |
| YK MCR Ltd | Financial services | 2025 |
| YM Sigma Solutions Ltd | Information & communication | 2023 |
| Ymai Ltd | Wholesale & retail | 2021 |
| Yogalife Academy Ltd | Arts & recreation | 2022 |
| Yogalife Collections Ltd | Extraterritorial | 2020 |
| York Property Management Limited | Households | 2017 |
| Young Explorers Childcare Limited | Education | 2009 |
| Younify Ltd | Manufacturing | 2026 |
| Your Chapter Holdings Limited | Professional & scientific | 2016 |
| Your Chapter Limited | Health & social care | 2014 |
| Your Chapter Topco Limited | Professional & scientific | 2024 |
| Your Dwelling Ltd | Real estate | 2025 |
| Your Flock Limited | Information & communication | 2018 |
| Your Padel Community CIC | Arts & recreation | 2026 |
| Your Private Health Limited | Health & social care | 2019 |
| Your Sexual Health Limited | Health & social care | 2014 |
| Your Support Team Ltd | Professional & scientific | 2015 |
| Your Tradies Ltd | Construction | 2025 |
| Yourpadel Ltd | Wholesale & retail | 2025 |
| Youth Care Alliance Ltd | Health & social care | 2025 |
| Yrdistributions Ltd | Wholesale & retail | 2026 |
| YSN Healthcare Ltd | Health & social care | 2022 |
| YUN Vision Ltd | Information & communication | 2019 |
| Yusuf Desai Ltd | Health & social care | 2025 |
| Yvoo Development Ltd | Construction | 2018 |
| Yvoo Limited | Real estate | 2018 |
| Yvoo Properties Ltd | Real estate | 2018 |
| Z Events Ltd | Arts & recreation | 2022 |
| ZA Architects Ltd | Professional & scientific | 2016 |
| ZA Homes MCR Ltd | Real estate | 2025 |
| Zafar Investments Ltd | Real estate | 2020 |
| Zahir Sheikh Ltd | Wholesale & retail | 2022 |
| Zain Motors UK Ltd | Wholesale & retail | 2020 |
| ZAL Homes Ltd | Construction | 2024 |
| Zamantech Ltd | Wholesale & retail | 2024 |
| Zasmhs Limited | Wholesale & retail | 2021 |
| Zaza Capital Limited | Real estate | 2023 |
| Zcubed Associates Limited | Education | 2024 |
| Zcubed Property Limited | Real estate | 2024 |
| Zecchini Ltd | Health & social care | 2023 |
| ZEE Pharmacist Limited | Wholesale & retail | 2024 |
| Zeenarni Ltd | Administrative & support | 2016 |
| Zeeshan Siddique Photography & Films Ltd | Information & communication | 2015 |
| Zehra Photographer Limited | Professional & scientific | 2015 |
| Zeki's Kitchen Ltd | Hospitality | 2025 |
| Zelalset Limited | Hospitality | 2024 |
| Zeman Consultancy Limited | Administrative & support | 2015 |
| Zenith Capital & Consultancy Ltd | Information & communication | 2026 |
| Zenith Gatley (Management Company) Limited | Administrative & support | 2008 |
| Zennys Limited | Health & social care | 2016 |
| Zenzium Ltd | Information & communication | 2016 |
| Zerko Ltd | Real estate | 2018 |
| Zerojb Estates Ltd | Real estate | 2022 |
| Zesh Limited | Health & social care | 2012 |
| Zeus Commercial Limited | Real estate | 2021 |
| ZF Property Ltd | Real estate | 2023 |
| ZFH Group Ltd | Wholesale & retail | 2020 |
| ZH Recruitment Ltd | Wholesale & retail | 2024 |
| Zhak Properties Ltd | Real estate | 2024 |
| Zingaromcr Ltd | Hospitality | 2025 |
| Zisa Ventures Ltd | Real estate | 2025 |
| ZK Property & Management Ltd | Real estate | 2024 |
| Zkalimi Ltd | Health & social care | 2024 |
| ZNK Healthcare Ltd | Health & social care | 2022 |
| Zohair and Nadia Investments Limited | Real estate | 2024 |
| ZR IT Solutions Limited | Professional & scientific | 2017 |
| ZSK Group Limited | Hospitality | 2023 |
| ZSM Pharma Ltd | Wholesale & retail | 2024 |
| ZSZ3 Limited | Professional & scientific | 2021 |
| Zumrut Ltd | Wholesale & retail | 2022 |
| ZUS Services Ltd | Health & social care | 2020 |
| Zuzu Property Management Limited | Real estate | 2026 |
| Zzmedical Ltd | Health & social care | 2020 |