| Zane Homes Estates Limited | Real estate | 2025 |
| Zane Homes Holdings Limited | Financial services | 2024 |
| Zane Homes Limited | Construction | 2020 |
| Zane Homes Properties Limited | Construction | 2025 |
| Zanfi Investments Limited | Real estate | 2011 |
| Zanista Consulting Limited | Information & communication | 2001 |
| Zannaa Ltd | Wholesale & retail | 2020 |
| Zantsi Limited | Health & social care | 2025 |
| ZAP 1 Ltd | Real estate | 2021 |
| ZAP 2 Ltd | Real estate | 2023 |
| ZAP Electrical Ltd | Construction | 2017 |
| Zap-It Solutions Limited | Information & communication | 2014 |
| Zapco UK Limited | Real estate | 2017 |
| Zapp Associates Ltd | Administrative & support | 2024 |
| Zara Elizabeth Design Ltd | Professional & scientific | 2020 |
| Zaraf & Co Ltd | Professional & scientific | 2022 |
| Zarah Interior Ltd | Manufacturing | 2019 |
| Zarar & Bros Limited | Education | 2015 |
| Zarehvi Limited | Wholesale & retail | 2026 |
| Zarmahi Ltd | Wholesale & retail | 2025 |
| Zarolia Parcel Service Limited | Transport & logistics | 2017 |
| Zarta Investments Ltd | Real estate | 2025 |
| Zaru Consultancy Ltd | Professional & scientific | 2020 |
| ZAS-PPL-110 Ltd | Real estate | 2025 |
| ZAS-SPL-110 Ltd | Real estate | 2025 |
| Zasaai Ltd | Financial services | 2019 |
| Zasef Express Limited | Transport & logistics | 2015 |
| Zasef Healthcare Limited | Health & social care | 2022 |
| Zass Traders Ltd | Wholesale & retail | 2023 |
| ZAT Medical Limited | Health & social care | 2020 |
| Zatano Ltd | Administrative & support | 2010 |
| ZAU Investments Limited | Financial services | 2019 |
| Zaveritaxi Ltd | Transport & logistics | 2024 |
| Zavson Property Investments Ltd | Real estate | 2019 |
| Zavsons Lettings Ltd | Real estate | 2026 |
| Zavsons Limited | Real estate | 2018 |
| Zawadi Health Limited | Health & social care | 2025 |
| Zayan Consultancy Ltd | Professional & scientific | 2012 |
| Zayd Holdings Limited | Financial services | 2019 |
| Zayde Investments Limited | Real estate | 2019 |
| Zayn Europe Ltd | Wholesale & retail | 2025 |
| Zaynab & Zahra Trading Ltd | Wholesale & retail | 2025 |
| Zaynab Ltd | Real estate | 2018 |
| Zaynnet Ltd | Wholesale & retail | 2023 |
| Zaynrahman Limited | Real estate | 2023 |
| Zaysha Estate UK Ltd | Real estate | 2022 |
| Zayuhealth Limited | Health & social care | 2023 |
| ZAZ (Invesments) Limited | Real estate | 2025 |
| ZAZ Traders Ltd | Wholesale & retail | 2025 |
| ZB & HS Company Ltd | Health & social care | 2023 |
| ZB Building Ltd | Construction | 2025 |
| ZB Medical Ltd | Health & social care | 2020 |
| Zbarlea Limited | Transport & logistics | 2021 |
| ZBW Group Ltd | Health & social care | 2026 |
| ZCT Limited | Manufacturing | 2004 |
| ZD Metrology Ltd | Professional & scientific | 2023 |
| ZDI Properties Limited | Real estate | 2018 |
| Zdms Ltd | Manufacturing | 2022 |
| Zdrava Construction Leicester Limited | Construction | 2021 |
| Zeal Wilkes Ltd | Professional & scientific | 2021 |
| Zebertino Construction Ltd | Construction | 2020 |
| Zebra 2.4 Limited | Professional & scientific | 2025 |
| Zebun Property Ltd | Real estate | 2023 |
| ZED Investments Limited | Real estate | 2021 |
| ZED Squared Ltd | Extraterritorial | 2017 |
| Zedstone Solutions Ltd | Wholesale & retail | 2026 |
| ZEE Motors Ltd | Wholesale & retail | 2011 |
| ZEE Pizza Ltd | Hospitality | 2026 |
| Zeeba Limited | Wholesale & retail | 2022 |
| Zeebax Limited | Wholesale & retail | 2021 |
| Zeeco Fashions Ltd | Professional & scientific | 2001 |
| Zeeinger Ltd | Wholesale & retail | 2019 |
| Zeenat Auto Limited | Wholesale & retail | 2025 |
| Zeenat Traders Limited | Wholesale & retail | 2009 |
| Zeenatec Systems Limited | Professional & scientific | 2003 |
| Zeepharm Ltd | Health & social care | 2024 |
| Zeerah Ltd | Hospitality | 2023 |
| Zeeshan Autos Ltd | Wholesale & retail | 2024 |
| Zeezeesgroup Ltd | Hospitality | 2025 |
| ZEI Pharma Services Ltd | Professional & scientific | 2026 |
| Zeifman Limited | Extraterritorial | 2025 |
| Zein Catering Limited | Hospitality | 2015 |
| Zeion International Limited | Wholesale & retail | 2020 |
| Zeit Foods Ltd | Hospitality | 2020 |
| Zellingtons Ltd | Wholesale & retail | 2024 |
| Zeltech Ltd | Wholesale & retail | 2019 |
| Zelvion Consultancy Ltd | Professional & scientific | 2026 |
| ZEM Construction Limited | Manufacturing | 2026 |
| ZEN & MAX UK Limited | Professional & scientific | 2014 |
| ZEN CBD Ltd | Wholesale & retail | 2025 |
| ZEN J International Limited | Information & communication | 2025 |
| ZEN Ledger UK Limited | Professional & scientific | 2023 |
| ZEN Nights Ltd | Hospitality | 2023 |
| Zenakara Ltd | Real estate | 2024 |
| Zenara Estates Ltd | Real estate | 2025 |
| Zenco Legal Limited | Other services | 2014 |
| Zenco Social Limited | Financial services | 2021 |
| Zendor Limited | Information & communication | 2016 |
| Zenincommerce Ltd | Wholesale & retail | 2026 |
| Zenith (Bolton) Ltd | Real estate | 2010 |