| ZA Medical Services Limited | Health & social care | 2016 |
| Zack Mcgrath Ltd | Wholesale & retail | 2022 |
| Zacksen Properties Ltd | Real estate | 2023 |
| Zahar Support Ltd | Health & social care | 2019 |
| Zaidis Family Limited | Real estate | 2023 |
| Zakeli Technologies Limited | Information & communication | 2026 |
| Zalvan Ltd | Real estate | 2025 |
| Zaza Consultant Ltd | Hospitality | 2015 |
| Zebcarz Driving School Limited | Education | 2025 |
| Zeeprime Consulting Limited | Health & social care | 2021 |
| ZEN Contracts Midlands Limited | Professional & scientific | 2018 |
| Zena Assi Limited | Arts & recreation | 2015 |
| Zenith Advisory Services Limited | Professional & scientific | 2015 |
| Zenith Compliance & Business Solutions Ltd | Administrative & support | 2024 |
| Zeno Fine Art Ltd | Manufacturing | 2021 |
| Zenzo Ltd | Information & communication | 2018 |
| Zero 2 Design Ltd | Information & communication | 2018 |
| Zero 2 Hero Security Ltd | Administrative & support | 2025 |
| Zero 5 Hundred Limited | Professional & scientific | 2020 |
| Zero Estates Limited | Professional & scientific | 1998 |
| Zetvee Ltd | Wholesale & retail | 2026 |
| Zhao Hold Ltd | Real estate | 2020 |
| Zhao Home Ltd | Financial services | 2020 |
| Zion Nest Ltd | Real estate | 2023 |
| Zion Residency Ltd | Real estate | 2025 |
| Zobana Ltd | Manufacturing | 2026 |
| Zomah Investments Limited | Real estate | 2025 |
| Zone Training Facility’S Ltd | Administrative & support | 2025 |
| Zoom Recruitment Services Ltd | Administrative & support | 2012 |
| ZQ Corp. Ltd | Wholesale & retail | 2025 |
| Zuwa Aisien Ltd | Hospitality | 2023 |