| Zattere Limited | Arts & recreation | 2009 |
| Zaveri Sons Limited | Hospitality | 2022 |
| ZB SEO LLP | | 2018 |
| Zbib and Jetel Trading Limited | Administrative & support | 2023 |
| Zeal Finance Solutions Ltd | Professional & scientific | 2022 |
| Zeal Inc Ltd | Professional & scientific | 2017 |
| Zecast Technologies Limited | Information & communication | 2017 |
| Zeefina Ltd | Wholesale & retail | 2026 |
| Zeetu Holdings Limited | Manufacturing | 2025 |
| Zenith Bookkeeping Services Ltd | Professional & scientific | 2020 |
| Zenith Hospitality Ltd | Hospitality | 2025 |
| Zennix Auto Ltd | Wholesale & retail | 2023 |
| Zenris Limited | Professional & scientific | 2021 |
| Zentara Industries Ltd | Wholesale & retail | 2026 |
| Zerin Solutions Limited | Information & communication | 2012 |
| Zero Day Promotions Limited | Arts & recreation | 2019 |
| Zest Bar Company Ltd | Hospitality | 2020 |
| Zest Watches Ltd | Wholesale & retail | 2021 |
| Zhejiang Barbarik Trade Co., Ltd | Extraterritorial | 2021 |
| Zhejiang Lida Industry Co., Ltd. | Extraterritorial | 2019 |
| Zhejiang Miboi IMP. & EXP. Co., Ltd | Extraterritorial | 2015 |
| Zhejiang Ming WEI Industry and Trade Co., Ltd | Extraterritorial | 2021 |
| Zhejiang New Better Industry Co., Ltd | Administrative & support | 2019 |
| Zhejiang Polestar Tools Co., Ltd | Wholesale & retail | 2019 |
| Zhejiang Rareme Packaging Technology Co., Ltd | Wholesale & retail | 2023 |
| Zhejiang Reliable Machinery Co., Ltd | Wholesale & retail | 2024 |
| Zhejiang Torbo Industrial Co., Ltd | Wholesale & retail | 2023 |
| Zhejiang Zhongda Pet Products Co., Ltd | Extraterritorial | 2022 |
| Zhengda Motors Co., Ltd | Wholesale & retail | 2024 |
| Zhenjiang Leimingkai Tools Co., Ltd | Administrative & support | 2023 |
| Zhongshan Zhihao Lighting Co., Limited | Administrative & support | 2020 |
| Zhoubo W&C Technology Co., Ltd | Administrative & support | 2022 |
| Zhoushan Hongyang Shipbuilding Engineering Service Co., Ltd | Wholesale & retail | 2026 |
| Zicon Homes Limited | Wholesale & retail | 2025 |
| Ziffity Solutions UK Limited | Information & communication | 2020 |
| Zinesure Limited | Information & communication | 2015 |
| Zinker UK Limited | Manufacturing | 2020 |
| ZKM Consulting Ltd | Professional & scientific | 2023 |
| ZL Technologies UK Ltd | Information & communication | 2020 |
| Zlate 79 Transport Ltd | Transport & logistics | 2022 |
| ZMC Consulting Limited | Information & communication | 2010 |
| ZME Blue Ltd | Wholesale & retail | 2022 |
| ZME Properties Ltd | Real estate | 2024 |
| ZOE Plastic Solution Co., Limited | Wholesale & retail | 2019 |
| Zollerdel Limited | Real estate | 2025 |
| Zomyto Consulting Limited | Information & communication | 2017 |
| Zone 2 Zone London Ltd | Construction | 2019 |
| Zongduo Trading Company Limited | Wholesale & retail | 2023 |
| Zoom Building Services Limited | Construction | 2015 |
| Zoom Corrosion Technology Limited | Other services | 2018 |
| Zoom Occasions Limited | Hospitality | 2019 |
| Zora Studio Brands Ltd | Wholesale & retail | 2025 |