| Yumkinu Limited | Professional & scientific | 2024 |
| Yuval Korn Limited | Real estate | 2016 |
| YZ Remote Diagnostic Limited | Health & social care | 2020 |
| YZ Remote Investment Ltd | Financial services | 2024 |
| Z B Consultants Ltd | Information & communication | 2013 |
| Z Real Estates Lettings Ltd | Real estate | 2023 |
| Z Real Estates Ltd | Real estate | 2021 |
| Z&L Trading Ltd | Wholesale & retail | 2020 |
| Zahriz Ltd | Wholesale & retail | 2024 |
| Zaro Design Ltd | Professional & scientific | 2020 |
| Zaroo London Ltd | Wholesale & retail | 2025 |
| Zasm Ltd | Hospitality | 2015 |
| Zayla Investments Limited | Real estate | 2017 |
| Zaytoon Investments Limited | Real estate | 2024 |
| Zaytoon Smile Centre Limited | Health & social care | 2024 |
| Zebralc Limited | Professional & scientific | 2012 |
| Zehro Limited | Professional & scientific | 2015 |
| ZEN Beauty Ltd | Other services | 2023 |
| Zerb Ltd | Wholesale & retail | 2024 |
| Zeroah Properties Ltd | Extraterritorial | 2024 |
| Zeroah Ventures Limited | Wholesale & retail | 2020 |
| Zeynep Kartal Fashion Ltd | Manufacturing | 2018 |
| Zhou Property Holdings Ltd | Real estate | 2026 |
| ZI Pharm Ltd | Health & social care | 2016 |
| Zivy Ltd | Real estate | 2023 |
| ZL Realisations Limited | Information & communication | 2017 |
| ZNB Plant Hire Ltd | Administrative & support | 2025 |
| ZNB Properties Ltd | Real estate | 2023 |
| Zntglobal Ltd | Wholesale & retail | 2025 |
| Zochios Limited | Financial services | 2025 |
| Zochstein Limited | Real estate | 2025 |
| ZOE Ilana Hill Limited | Professional & scientific | 2026 |
| Zombie Chicken Limited | Information & communication | 2024 |
| ZR Takeaway Ltd | Hospitality | 2022 |
| Zynergy Power Limited | Financial services | 2025 |