| Zara Boutique (Yorkshire) Ltd | Wholesale & retail | 2025 |
| Zara Hana Ltd | Health & social care | 2024 |
| Zara Lettings Ltd | Other services | 2022 |
| Zara Tariq Ltd | Financial services | 2017 |
| Zaraexpert Limited | Hospitality | 2026 |
| Zarah Enterprise Ltd | Wholesale & retail | 2026 |
| Zari Sales Consultants Ltd | Professional & scientific | 2025 |
| Zarina Foods Ltd | Hospitality | 2024 |
| Zarlion Commerce Limited | Wholesale & retail | 2026 |
| Zarmaan Ltd | Wholesale & retail | 2024 |
| Zarmeenz 649 Ltd. | Wholesale & retail | 2017 |
| Zarry Mart Ltd | Wholesale & retail | 2023 |
| Zaryab Frozen Food Limited | Manufacturing | 2026 |
| Zash Support Work Ltd | Health & social care | 2023 |
| Zasi Britannia Limited | Financial services | 2024 |
| Zasim Ltd | Wholesale & retail | 2025 |
| Zatae Property Group Ltd | Real estate | 2025 |
| Zauz Emporium Ltd | Wholesale & retail | 2025 |
| Zauz Media Network Ltd | Professional & scientific | 2024 |
| Zavis Wakefield Ltd | Hospitality | 2025 |
| ZAW Haulage Limited | Transport & logistics | 2021 |
| Zawar Auto Engine Dismantlers Limited | | 1981 |
| Zawiyah Shop Ltd | Wholesale & retail | 2024 |
| Zayaan Cars Ltd | Wholesale & retail | 2026 |
| Zayaan School Transport Ltd | Transport & logistics | 2025 |
| Zayaan Superstore Ltd | Wholesale & retail | 2025 |
| Zayan SAK Limited | Wholesale & retail | 2018 |
| Zaylio Ltd | Wholesale & retail | 2025 |
| Zaynah Limited | Wholesale & retail | 2024 |
| Zayns Collection Ltd | Wholesale & retail | 2026 |
| Zaytuna Social Care Ltd | Health & social care | 2023 |
| Zayyan Transport Ltd | Transport & logistics | 2026 |
| Zazu Market Ltd | Wholesale & retail | 2026 |
| ZB Furnishings Ltd | Wholesale & retail | 2021 |
| ZB Mart Ltd | Manufacturing | 2022 |
| ZBP25 Ltd | Real estate | 2025 |
| ZBS Makeup Ltd | Other services | 2017 |
| ZDA Properties Ltd | Households | 2025 |
| Zeal Consultancy Ltd | Information & communication | 2022 |
| Zeal Ltd | Hospitality | 2019 |
| Zebra Crossings Limited | Health & social care | 2024 |
| Zebs Steakhouse & Pizza Bar Ltd | Hospitality | 2024 |
| Zebs Steakhouse Ltd | Hospitality | 2025 |
| Zebulun Healthcare Ltd | Administrative & support | 2020 |
| ZED Automotive Ltd | Wholesale & retail | 2019 |
| ZED Decor Limited | Administrative & support | 2014 |
| Zedz Food Supplies Ltd | Wholesale & retail | 2024 |
| ZEE Bargains Ltd | Wholesale & retail | 2022 |
| ZEE Corporate Limited | Wholesale & retail | 2022 |
| ZEE Enterprises Ltd | Wholesale & retail | 2025 |
| ZEE Links BFD Limited | Wholesale & retail | 2015 |
| ZEE Locum Services Limited | Health & social care | 2025 |
| ZEE Management Ltd | Hospitality | 2024 |
| ZEE Managment Services Limited | Wholesale & retail | 2025 |
| ZEE Mobile Barber Limited | Other services | 2022 |
| ZEE Property Expert Ltd | Construction | 2025 |
| ZEE Snacks Ltd | Hospitality | 2025 |
| Zeeshanzaka Ltd | Wholesale & retail | 2025 |
| Zeest & Co Limited | Wholesale & retail | 2025 |
| Zeetax Limited | Wholesale & retail | 2024 |
| Zeke a Limited | Transport & logistics | 2023 |
| Zelvix Ltd | Wholesale & retail | 2026 |
| Zenith Capital Bradford Ltd | Professional & scientific | 2025 |
| Zenith Construction Consultants Ltd | Construction | 2024 |
| Zenith House Propco Limited | Real estate | 2021 |
| Zenith International Freight Holdings Ltd | Financial services | 2016 |
| Zenith International Freight Limited | Transport & logistics | 1999 |
| Zenith Psychotherapy Ltd | Health & social care | 2024 |
| Zenith Supplies Ltd | Water & waste | 2025 |
| Zenithaxis Ltd | Wholesale & retail | 2026 |
| Zenova Life Ltd | Wholesale & retail | 2025 |
| Zens Barbers Ltd | Other services | 2020 |
| Zentech Ltd | Wholesale & retail | 2023 |
| Zentrix Motors Ltd | Wholesale & retail | 2026 |
| Zentrixmotorz Ltd | Wholesale & retail | 2026 |
| Zentyro Limited | Wholesale & retail | 2025 |
| Zenvira Traders Ltd | Wholesale & retail | 2026 |
| Zenvixo Ltd | Wholesale & retail | 2026 |
| Zenzoe Universal Ltd | Wholesale & retail | 2026 |
| Zephyer Ltd | Wholesale & retail | 2024 |
| Zephyr Security Solutions Limited | Professional & scientific | 2007 |
| Zero Defects (UK) Ltd | Information & communication | 2012 |
| Zero Eight Global Limited | Other services | 2014 |
| Zero Genetics Fight Club Ltd | Other services | 2025 |
| Zero Genetics Gym Ltd | Other services | 2025 |
| Zero to Infinity Media Limited | Professional & scientific | 2025 |
| Zeshaan Akhtar Ltd | Professional & scientific | 2024 |
| Zest 365 Ltd. | Wholesale & retail | 2013 |
| Zesty Delights Ltd | Wholesale & retail | 2025 |
| Zeteo Limited | Information & communication | 2026 |
| Zevora Ltd | Wholesale & retail | 2026 |
| ZFC Foods Ltd | Hospitality | 2024 |
| ZH & a Limited | Administrative & support | 2026 |
| ZH Care Services Ltd | Health & social care | 2025 |
| ZH Dent Ltd | Health & social care | 2010 |
| Zhea Group Ltd | Real estate | 2026 |
| Zi&L Properties Limited | Real estate | 2026 |
| Zi's Holding Ltd | Financial services | 2023 |
| ZIA Capital Holdings Ltd | Financial services | 2025 |
| Zias Sports Ltd | Wholesale & retail | 2022 |