| Yuan Yang Trading Limited | Wholesale & retail | 2025 |
| Yukoni Ltd | Transport & logistics | 2025 |
| Yule Civil Ltd | Construction | 2026 |
| YUM YUM Mini Market Ltd | Wholesale & retail | 2025 |
| Yummy Fung Ltd | Hospitality | 2024 |
| YY Property Group Ltd | Real estate | 2026 |
| YZ Accountants Limited | Professional & scientific | 2021 |
| Z & H Properties Limited | Real estate | 2017 |
| Z Catering Limited | Hospitality | 2017 |
| Z Industries Ltd | Professional & scientific | 2019 |
| Z Life Ltd | Financial services | 2020 |
| Z MO Ltd | Hospitality | 2022 |
| Z&A Sheikhs Limited | Health & social care | 2014 |
| Z&A Ventures Ltd | Wholesale & retail | 2026 |
| Z&H Business Power Ltd | Wholesale & retail | 2026 |
| Z&K T/A Subway Ltd | Hospitality | 2020 |
| Z&R Services Limited | Wholesale & retail | 2020 |
| Z.K. Cars Sale Ltd | Wholesale & retail | 2023 |
| ZA Holdings (Derby) Limited | Financial services | 2023 |
| Zaak Transport Ltd | Transport & logistics | 2025 |
| Zadran Distribution Ltd | Wholesale & retail | 2018 |
| Zahra Haroon Limited | Health & social care | 2025 |
| Zahrah Trading Ltd | Hospitality | 2024 |
| Zaira Mughal Ltd | Health & social care | 2022 |
| ZAK Enterprises (Derby) Limited | Hospitality | 2024 |
| Zakatukis Ltd | Wholesale & retail | 2025 |
| Zalarash Amin Ltd | Wholesale & retail | 2022 |
| Zalos Express Ltd | Transport & logistics | 2026 |
| ZAM Business Services Limited | Wholesale & retail | 2024 |
| ZAM ZAM Sweets Peterborough Ltd | Wholesale & retail | 2017 |
| Zambuko Limited | Wholesale & retail | 2026 |
| Zamzam Sweets Derby Limited | Manufacturing | 2020 |
| ZAN 19 Ltd | Health & social care | 2020 |
| Zani Convenience Store Ltd | Wholesale & retail | 2025 |
| Zani Midland Limited | Wholesale & retail | 2026 |
| Zareen Roohi Works Ltd | Professional & scientific | 2026 |
| Zartaj Dream Limited | Wholesale & retail | 2025 |
| Zasaco Ltd | Wholesale & retail | 2024 |
| Zass Accounting Limited | Professional & scientific | 2017 |
| Zaviyar Global Trading Ltd | Wholesale & retail | 2026 |
| Zaya Limited | Wholesale & retail | 2024 |
| Zayan Properties Limited | Real estate | 2003 |
| Zayt & Zaatar Limited | Hospitality | 2025 |
| Zayyan Floors Ltd | Construction | 2025 |
| Zazu Studio Limited | Arts & recreation | 2012 |
| ZBA Limited | Hospitality | 2026 |
| ZBF Building Renovation Ltd | Construction | 2026 |
| ZBH Properties Limited | Real estate | 2025 |
| ZBZ Consults Ltd | Professional & scientific | 2024 |
| ZDY Property Ltd | Real estate | 2017 |
| Zebbo Productions Limited | Arts & recreation | 2019 |
| ZEE Dazzle Limited | Wholesale & retail | 2024 |
| ZEE Launch Ltd | Wholesale & retail | 2026 |
| ZEE ZEE Derby Limited | Wholesale & retail | 2026 |
| Zeeba Dalston Limited | Education | 2012 |
| Zeeba Day Care Limited | Education | 2013 |
| Zeeba Pre-School Limited | Education | 2009 |
| Zeeba Woolwich Limited | Education | 2013 |
| Zeebaazar Limited | Wholesale & retail | 2024 |
| Zeelo Limited | Information & communication | 2016 |
| Zeelo Supplies Limited | Transport & logistics | 2017 |
| Zeenix Limited | Wholesale & retail | 2026 |
| Zeeshan Foods Limited | Hospitality | 2024 |
| Zeet Traffic Management Limited | Construction | 2026 |
| Zeetechno Ltd | Wholesale & retail | 2025 |
| Zeha Ltd | Wholesale & retail | 2020 |
| Zein Capital Ltd | Real estate | 2019 |
| Zeki Hair Designs Limited | Other services | 2005 |
| Zelenko Ltd | Transport & logistics | 2025 |
| Zemunuk Ltd | Wholesale & retail | 2025 |
| ZEN Nottingham Limited | Other services | 2020 |
| ZEN Properties (Leicester) Limited | Real estate | 2023 |
| Zendi Limited | Health & social care | 2024 |
| Zenexa Renewables Limited | Energy | 2024 |
| Zenith Cyber Ltd | Information & communication | 2024 |
| Zenith Homes Group Ltd | Real estate | 2023 |
| Zenith Key Properties Ltd | Real estate | 2025 |
| Zenithedge Services Ltd | Real estate | 2025 |
| Zenkar Ltd | Wholesale & retail | 2014 |
| Zeno Zone Ltd | Wholesale & retail | 2025 |
| Zenos Automotive Ltd | Wholesale & retail | 2007 |
| Zenos Cars Ltd | Manufacturing | 2017 |
| Zenos Cars Technology Ltd | Administrative & support | 2021 |
| Zenyoyage Ltd | Administrative & support | 2025 |
| Zero Bonsai Ltd | Wholesale & retail | 2021 |
| Zero Carbon Associates Limited | Administrative & support | 2022 |
| Zero Germs Limited | Administrative & support | 2024 |
| Zero One INT Ltd | Manufacturing | 2022 |
| Zero Oracle Ltd | Arts & recreation | 2007 |
| Zest Food Service Limited | Manufacturing | 2001 |
| Zest Produce Holdings Ltd | Financial services | 2023 |
| Zest Produce Limited | Wholesale & retail | 2024 |
| Zestfit Virtual Limited | Arts & recreation | 2020 |
| Zeta X Ltd | Wholesale & retail | 2024 |
| ZFG Properties Ltd | Real estate | 2019 |
| ZI Solutions Limited | Wholesale & retail | 2012 |
| Ziajka Trans Ltd | Transport & logistics | 2018 |
| Zielant and Zielant Ltd | Construction | 2024 |
| Ziffnet Investments Ltd | Real estate | 2019 |
| Ziggsi Limited | Information & communication | 2014 |