| ZHI Qing Liang Ltd. | Wholesale & retail | 2025 |
| Zhiliangquant UK Ltd | Financial services | 2025 |
| Zhiqi Xingchen E-Commerce Co., Ltd | Wholesale & retail | 2022 |
| Zhou KJ CEN Ltd. | Wholesale & retail | 2025 |
| Zhou Xing Tang Ltd. | Wholesale & retail | 2025 |
| Zhuang KJ Ltd. | Wholesale & retail | 2025 |
| ZI BIN Chen Ltd. | Wholesale & retail | 2025 |
| ZI Sparks Ltd | Construction | 2025 |
| ZIA Solutions Limited | Information & communication | 2025 |
| ZIB Consultancy Limited | Professional & scientific | 2026 |
| Ziegelhaus Portfolio Limited | Real estate | 2017 |
| Zielony Most Consulting Limited | Administrative & support | 2002 |
| Zifram Ltd. | Information & communication | 2017 |
| Zifto Ltd | Wholesale & retail | 2026 |
| ZIG ZAG Group Limited | Other services | 1996 |
| ZIG ZAG Wholesale Limited | Extraterritorial | 2003 |
| Ziggy Agency Ltd | Information & communication | 2019 |
| Ziggy Holdings Limited | Professional & scientific | 2022 |
| Zigma Logistics Limited | Transport & logistics | 2024 |
| ZIL Education Limited | Education | 2025 |
| ZIM Trading Ltd | Wholesale & retail | 2024 |
| Zimcraft Ltd | Manufacturing | 2006 |
| Zimzam Limited | Other services | 2014 |
| Zinc Developments (Camberley) Ltd | Construction | 2022 |
| Zinc UK Investments Ltd | Real estate | 2020 |
| Zinglet Limited | Hospitality | 2025 |
| Zingo Mart Ltd | Wholesale & retail | 2025 |
| Zinosi Ltd | Information & communication | 2017 |
| Zinpify Limited | Information & communication | 2015 |
| Zinto Ltd | Health & social care | 2024 |
| Zinvite Ltd | Information & communication | 2013 |
| Zion OIL Ltd | Wholesale & retail | 2012 |
| Zion Retail Limited | Wholesale & retail | 2018 |
| Zion World Food Limited | Hospitality | 2020 |
| Zionshill Limited | Construction | 2020 |
| ZIP UP Limited | Other services | 2007 |
| Zipp Mobility UK Ltd | Transport & logistics | 2020 |
| Ziptron Automation Ltd | Professional & scientific | 2026 |
| Zique Cocktails Limited | Wholesale & retail | 2024 |
| Ziri Limited | Health & social care | 2025 |
| Ziso Virtual Control Ltd | Construction | 2024 |
| Ziutex Logistics Ltd | Transport & logistics | 2013 |
| Zivai Ltd | Real estate | 2024 |
| Ziwaka Limited | Health & social care | 2014 |
| Zizi Valley Ltd | Health & social care | 2026 |
| Zizo Analytics Limited | Information & communication | 2017 |
| ZJ XU Ltd. | Wholesale & retail | 2025 |
| ZK Electrix Ltd | Construction | 2025 |
| ZK Property Services Ltd | Real estate | 2026 |
| Zkaz Ltd | Wholesale & retail | 2025 |
| ZLS Property Limited | Real estate | 2015 |
| ZM Car Repairs Limited | Wholesale & retail | 2025 |
| ZM Healthcare Limited | Health & social care | 2015 |
| ZM Pharma Ltd | Wholesale & retail | 2023 |
| ZMF Properties Ltd | Real estate | 2023 |
| ZMG Security Ltd | Administrative & support | 2022 |
| ZMH Housing Ltd | Real estate | 2025 |
| Zmig Digital Solutions Ltd | Information & communication | 2024 |
| ZMK Property Management Ltd | Real estate | 2026 |
| ZMS Solutions Limited | Professional & scientific | 2022 |
| ZO + RO Ltd | Financial services | 2022 |
| ZOE Russell-Turner Limited | Professional & scientific | 2013 |
| ZOE Woodward Gardening Ltd | Wholesale & retail | 2020 |
| Zoe's Essence Estates Ltd | Real estate | 2025 |
| Zoe's Essence Ltd | Wholesale & retail | 2023 |
| Zoho Corporation Limited | Information & communication | 2021 |
| Zolayola Ltd. | Information & communication | 2015 |
| ZON Consulting Services Ltd | Information & communication | 2012 |
| Zons REX International Ltd | Wholesale & retail | 2026 |
| Zoohause Limited | Wholesale & retail | 2016 |
| Zoom Dispatch UK Ltd | Real estate | 2020 |
| Zoom Property INV Ltd | Real estate | 2025 |
| Zoom Studios Ltd | Professional & scientific | 2022 |
| Zoom Taxis & Executive Ltd | Transport & logistics | 2018 |
| Zoomi Limited | Real estate | 2018 |
| Zorb Realtors Ltd | Real estate | 2024 |
| Zoshen Corporation Ltd | Manufacturing | 2018 |
| Zoulakis Travel Ltd | Administrative & support | 2026 |
| Zoya Pharm Ltd | Wholesale & retail | 2022 |
| Zozuvah Concepts Limited | Wholesale & retail | 2018 |
| ZQ XU Ltd. | Wholesale & retail | 2025 |
| Zrcg Ltd | Real estate | 2018 |
| ZRK MK Ltd | Hospitality | 2025 |
| ZS Management Commercial Ltd | Construction | 2026 |
| ZS Management Services Ltd | Real estate | 2022 |
| Zsah Limited | Information & communication | 2002 |
| Zsazsa Boot Sale Ltd | Wholesale & retail | 2026 |
| Zsstsix Limited | Health & social care | 2022 |
| Ztma Trans Limited | Transport & logistics | 2019 |
| Ztukseg Co., Ltd | Extraterritorial | 2019 |
| Zubed Geospatial Limited | Information & communication | 2000 |
| Zubed Sales Limited | Information & communication | 2008 |
| Zubeks Solutions Ltd | Real estate | 2025 |
| Zubes Consulting LLP | | 2026 |
| Zubi & MO PD Ltd | Real estate | 2021 |
| Zumec Health & Welness Services Ltd | Health & social care | 2025 |
| Zuni.Tech Ltd | Wholesale & retail | 2020 |
| Zura Group Ltd | Wholesale & retail | 2025 |
| Zuri Consulting Limited | Administrative & support | 2020 |
| Zuzi Ltd | Transport & logistics | 2023 |