| ZAM ZAM Halal Meat Ltd | Wholesale & retail | 2019 |
| Zaman UK Enterprises Limited | Real estate | 2018 |
| Zamble African Dance Company | Arts & recreation | 2005 |
| Zamo Alliance Limited | Health & social care | 2013 |
| Zaree Services Ltd | Wholesale & retail | 2019 |
| Zaro's Fresh Fruit & VEG Ltd | Wholesale & retail | 2023 |
| Zaroq Group Ltd | Administrative & support | 2025 |
| ZAS Trading Ltd | Transport & logistics | 2016 |
| Zasma Groups Ltd | Transport & logistics | 2015 |
| Zassons Limited | Real estate | 2012 |
| Zavitar Ltd | Professional & scientific | 2023 |
| Zawaya Ghadafan Trading Limited | Transport & logistics | 2024 |
| Zaykov Installations Ltd | Manufacturing | 2021 |
| ZB Investment Limited | Manufacturing | 2014 |
| ZBW Impex Limited | Wholesale & retail | 2015 |
| ZED Associates Ltd | Wholesale & retail | 2021 |
| ZED Trading London Limited | Construction | 2015 |
| ZEE Trading Ltd | Transport & logistics | 2016 |
| Zeesaytom Limited | Health & social care | 2022 |
| Zeezone Ltd | Wholesale & retail | 2026 |
| Zenith Engineering Surveys Ltd | Construction | 2019 |
| Zenzone Marketplace Limited | Wholesale & retail | 2024 |
| Zestien Management Ltd | Households | 2024 |
| Zetech Enterprises Ltd | Construction | 2025 |
| Zetexa Ltd | Wholesale & retail | 2026 |
| Zeytin Nuts & Spices UK Ltd | Wholesale & retail | 2025 |
| Zezu Limited | Real estate | 2025 |
| Zhanna Ltd | Construction | 2016 |
| ZHE German Doner & Shake Limited | Hospitality | 2014 |
| ZHE German Limited | Hospitality | 2017 |
| Ziaam Tech Ltd Ltd | Wholesale & retail | 2020 |
| Zida Building Materials Trading Limited | Wholesale & retail | 2025 |
| Zigi Properties Ltd | Real estate | 2022 |
| Zimal Ltd. | Wholesale & retail | 2015 |
| Zion - Shekinah Limited | Administrative & support | 2012 |
| Zion Leadership Consultancy Ltd | Financial services | 2023 |
| ZIQ Limited | Transport & logistics | 2021 |
| Zjmt Consulting Ltd | Professional & scientific | 2026 |
| ZKS Group Limited | Other services | 2022 |
| ZME Heating Ltd | Construction | 2024 |
| Zofat Ltd | Real estate | 2020 |
| Zoha Holds Ltd | Financial services | 2024 |
| Zoha Property Investment Ltd | Real estate | 2024 |
| Zoie&Emma Ltd | Wholesale & retail | 2022 |
| Zoom Music UK Limited | Information & communication | 2014 |
| ZRA London Trading Ltd | Transport & logistics | 2016 |
| ZRL Transport Ltd | Transport & logistics | 2025 |
| ZS Holds Ltd | Financial services | 2024 |
| ZS Living Ltd | Real estate | 2025 |
| ZS Properties Investments Ltd | Real estate | 2024 |
| ZSI (London) Ltd | Information & communication | 2020 |
| ZTR Ltd | Wholesale & retail | 2026 |
| Zubi Goods and Devices Online Limited | Wholesale & retail | 2024 |
| Zulfiqar Bashir Awan Contracting Company Ltd | Construction | 2024 |
| Zute Estates Ltd | Real estate | 2022 |
| ZYK Services Limited | Administrative & support | 2019 |
| Zzaq Trading Limited | Transport & logistics | 2018 |
| Æether Ltd | Other services | 2018 |
| Śankh & Nathrach Limited | Real estate | 2022 |