| Yovko Ltd | Transport & logistics | 2025 |
| YRS Properties Limited | Real estate | 2023 |
| Ysfood Stoke T/A RAZ Charcoal Grill Ltd | Hospitality | 2026 |
| YU Xiang Restaurant Ltd. | Hospitality | 2021 |
| Yuane Volition Ltd | Construction | 2022 |
| YUM Hub Hanley Ltd | Hospitality | 2026 |
| Yummy 838 Limited | Hospitality | 2025 |
| Yummy Brands Ltd | Hospitality | 2025 |
| Yummy LIN Limited | Hospitality | 2025 |
| Z and Z Community Support CIC | Health & social care | 2025 |
| Z K Recycling Ltd | Water & waste | 2024 |
| Z N a Catering Limited | Hospitality | 2017 |
| Z S Services (UK) Ltd | Construction | 2015 |
| Z Salmon Properties Ltd | Real estate | 2022 |
| Z&A Family Property Ltd | Real estate | 2025 |
| Z&E Traders Limited | Wholesale & retail | 2026 |
| Z&G Catalytic Converters Ltd | Water & waste | 2015 |
| Z&S Luxury Homes Ltd | Real estate | 2023 |
| Z-A Rental Properties Ltd | Real estate | 2026 |
| ZA Jabeen Ltd | Wholesale & retail | 2025 |
| ZA1 Properties Limited | Households | 2025 |
| Zaam AI Tech Global Solutions Ltd | Information & communication | 2025 |
| Zaam Wholesale Distribution Limited | Wholesale & retail | 2015 |
| Zack Ecommerce Limited | Wholesale & retail | 2026 |
| Zackson Ltd | Construction | 2021 |
| Zadrian Smith Studio Ltd | Arts & recreation | 2015 |
| ZAF Homework Ltd | Manufacturing | 2017 |
| Zafars Properties Limited | Real estate | 2025 |
| Zagros Store Ltd | Wholesale & retail | 2025 |
| Zaid Trading Ltd | Wholesale & retail | 2025 |
| Zaida Properties Limited | Real estate | 2025 |
| Zaidi Medicos Limited | Health & social care | 2025 |
| Zaintec Ltd | Wholesale & retail | 2025 |
| Zaisanz Limited | Wholesale & retail | 2023 |
| ZAK Foods and Catering Ltd | Hospitality | 2024 |
| Zakes Logistics Ltd | Transport & logistics | 2026 |
| Zall Collections Limited | Wholesale & retail | 2025 |
| ZAM Brothers Limited | Wholesale & retail | 2025 |
| ZAM International Limited | Wholesale & retail | 2021 |
| ZAM Transport Services Limited | Transport & logistics | 2026 |
| Zam's Store Limited | Wholesale & retail | 2024 |
| Zama Print Ltd | Manufacturing | 2011 |
| Zambia Ltd | Wholesale & retail | 2026 |
| Zamir Properties Ltd | Other services | 2023 |
| Zarka's Fast Food and Diner L.P. | | 2018 |
| ZAS Ceramics Limited | Professional & scientific | 2025 |
| Zavendra Ltd | Wholesale & retail | 2026 |
| Zawar Investments Limited | Construction | 2021 |
| ZAY G20 Limited | Wholesale & retail | 2025 |
| ZAY Portfolio Ltd | Real estate | 2024 |
| Zaya Holdings Limited | Financial services | 2022 |
| Zaym Properties Ltd | Real estate | 2025 |
| ZAZ Median Ltd | Transport & logistics | 2016 |
| Zazhi Limited | Wholesale & retail | 2024 |
| ZED Building Contractors Ltd | Construction | 2015 |
| ZEE Boutique Ltd | Wholesale & retail | 2022 |
| ZEE Property Services Ltd | Real estate | 2025 |
| Zeestar Limited | Wholesale & retail | 2020 |
| Zehratext Limited | Wholesale & retail | 2019 |
| Zena Group Ltd | Wholesale & retail | 2025 |
| Zenaida CLN Ltd | Wholesale & retail | 2022 |
| Zenhome Developments Limited | Wholesale & retail | 2017 |
| Zenith Blue Marketing Limited | Administrative & support | 2010 |
| Zenith Comms Limited | Construction | 2017 |
| Zenith Global Healthcare Limited | Health & social care | 2020 |
| Zenon Trading Ltd | Wholesale & retail | 2007 |
| Zenura Group Ltd | Wholesale & retail | 2026 |
| Zephyros Enterprise Network Ltd | Information & communication | 2016 |
| Zero Second Ltd | Wholesale & retail | 2026 |
| Zeropath Ltd | Information & communication | 2023 |
| Zest Hanley Hospitality Limited | Hospitality | 2019 |
| Zeus Regen Ltd | Wholesale & retail | 2024 |
| ZH Global Limited | Wholesale & retail | 2026 |
| ZIA Holdings Ltd | Real estate | 2022 |
| ZID Properties G20 Ltd | Real estate | 2025 |
| ZID Properties Limited | Real estate | 2022 |
| Zikar Estate Agent Ltd | Real estate | 2016 |
| Zilchtax Ltd | Professional & scientific | 2024 |
| Zillpharm Ltd | Wholesale & retail | 2025 |
| Zilpha Properties Limited | Real estate | 2017 |
| Zimexcel Ltd | Wholesale & retail | 2025 |
| Zion Books Ltd | Wholesale & retail | 2026 |
| Zipx Trading Ltd | Wholesale & retail | 2026 |
| Zirad Investments Ltd | Real estate | 2026 |
| Zirza Ltd | Wholesale & retail | 2025 |
| Zivanai Harahwa Limited | Health & social care | 2023 |
| ZIZ Events Ltd | Hospitality | 2025 |
| ZLB Limited | Professional & scientific | 2010 |
| ZM Collective Ltd | Wholesale & retail | 2026 |
| ZM Trading Commerce Limited | Wholesale & retail | 2024 |
| Zman Group Ltd | Real estate | 2025 |
| Zodiac 365 Limited | Construction | 2023 |
| ZOE at the Foot Health Clinic Limited | Health & social care | 2020 |
| ZOE Baggott Industries Ltd | Arts & recreation | 2022 |
| Zofa International Ltd | Wholesale & retail | 2025 |
| Zohan BWP Ltd | Wholesale & retail | 2025 |
| Zohan&Rohaan Ltd | Wholesale & retail | 2025 |
| Zommos Mattress Limited | Manufacturing | 2018 |
| Zoogly Media Limited | Information & communication | 2015 |
| Zoon Consultant Ltd | Information & communication | 2025 |