| Zing Fried Chicken Ltd | Hospitality | 2021 |
| Zing PFC Ltd | Hospitality | 2017 |
| Zing Spice Ltd | Hospitality | 2025 |
| Zingberry Ltd | Wholesale & retail | 2024 |
| Zinger Tiling Ltd | Manufacturing | 2025 |
| Zinka Properties Ltd | Real estate | 2023 |
| Zinka Property LLP | | 2023 |
| Zint Limited | Professional & scientific | 2023 |
| Zintex Ltd | Wholesale & retail | 2021 |
| Zion Christian Fellowship Ltd | Other services | 2011 |
| Zion Christian Prayer House | Other services | 2026 |
| Zippey Upvc Door & Window Repairs Limited | Construction | 2025 |
| Zis-Co. Ltd | Health & social care | 2014 |
| Zisb Limited | Professional & scientific | 2024 |
| Zivex Ltd | Information & communication | 2025 |
| Ziyaan Holding Ltd | Wholesale & retail | 2025 |
| Ziyara Tours Ltd | Administrative & support | 2022 |
| Ziza Solutions Limited | Information & communication | 2022 |
| ZJP Estates Ltd | Real estate | 2022 |
| ZK One Services Ltd | Wholesale & retail | 2023 |
| ZK Optical Ltd | Health & social care | 2022 |
| ZK Security Ltd | Financial services | 2019 |
| Zksa Consulting Limited | Professional & scientific | 2025 |
| ZLM C.I.C. | Administrative & support | 2014 |
| ZM A&I Consultancy Ltd | Information & communication | 2023 |
| ZM Business Solutions Ltd | Information & communication | 2025 |
| ZM Estates Ltd | Real estate | 2022 |
| ZM Guard Ltd | Administrative & support | 2025 |
| ZM Optical Ltd | Wholesale & retail | 2024 |
| ZM Services Ltd | Information & communication | 2024 |
| ZMB UK Trading Ltd | Wholesale & retail | 2025 |
| ZMC Transporter Limited | Transport & logistics | 2019 |
| ZMI Driving School Ltd | Education | 2026 |
| ZMK Properties Ltd | Real estate | 2020 |
| ZMT Autos London Ltd | Wholesale & retail | 2023 |
| ZMZ Traders Ltd | Wholesale & retail | 2020 |
| ZN Cars Ltd | Wholesale & retail | 2019 |
| ZN Foundation | Administrative & support | 2024 |
| ZN Solutions & Marketing Ltd | Administrative & support | 2023 |
| ZNH Enterprises Limited | Real estate | 2018 |
| ZNM Properties Ltd | Real estate | 2024 |
| ZNZ Podiatry Ltd | Health & social care | 2026 |
| Zobest Ltd | Construction | 2020 |
| Zohkan Investments 2 Limited | Real estate | 2022 |
| Zohkan Investments Limited | Real estate | 2020 |
| Zohra Yakrang Ltd | Other services | 2025 |
| Zokunglal Consulting Ltd | Professional & scientific | 2025 |
| Zone Building Services Ltd | Construction | 2015 |
| Zono Leathers Ltd | Wholesale & retail | 2024 |
| Zony Limited | Hospitality | 2023 |
| ZOO Bar Limited | Financial services | 2019 |
| ZOO Estates Limited | Construction | 2019 |
| ZOO Fashions Limited | Wholesale & retail | 2015 |
| ZOO London Limited | Wholesale & retail | 1997 |
| ZOO Property Holdings Limited | Real estate | 2004 |
| Zoom Abroad Online Limited | Information & communication | 2017 |
| Zoom London Ltd | Wholesale & retail | 2025 |
| Zoom Viza Ltd | Professional & scientific | 2026 |
| Zoomi Rides Ltd | Wholesale & retail | 2026 |
| Zora Construction Ltd | Construction | 2023 |
| Zoraix Ltd | Wholesale & retail | 2025 |
| Zorba Investments Limited | Real estate | 2022 |
| Zorba Limited | Extraterritorial | 2010 |
| Zoro Build Ltd | Construction | 2020 |
| Zosim Electrical Solutions Ltd | Construction | 2024 |
| Zovva Media Limited | Professional & scientific | 2025 |
| Zoya Beauty Salon Ltd | Administrative & support | 2022 |
| Zoya Capital Ltd | Professional & scientific | 2025 |
| Zoya Online Trading Ltd | Wholesale & retail | 2022 |
| ZR London Ltd | Wholesale & retail | 2015 |
| ZR Advisory Limited | Professional & scientific | 2026 |
| ZR Enterprise Ltd | Wholesale & retail | 2018 |
| ZR Pharma Ltd | Wholesale & retail | 2020 |
| ZR Trading Ltd | Wholesale & retail | 2025 |
| Zrauf Ltd | Information & communication | 2012 |
| ZRK Trading Ltd | Wholesale & retail | 2026 |
| ZS Building Services Ltd | Construction | 2017 |
| ZS Contractors Ltd | Construction | 2025 |
| ZS Furniture Ltd | Wholesale & retail | 2024 |
| ZS Housing Solutions Ltd | Real estate | 2025 |
| ZS Products London UK Ltd | Manufacturing | 2026 |
| ZS Sltns Limited | Information & communication | 2025 |
| ZS Solutions Limited | Wholesale & retail | 2012 |
| Zsbzkb Ltd | Hospitality | 2025 |
| Zsideo Content Ltd | Wholesale & retail | 2025 |
| ZSK AB London Limited | Real estate | 2023 |
| ZSK London Limited | Construction | 2022 |
| ZSS INT Ltd | Real estate | 2022 |
| ZST Care Ltd | Health & social care | 2024 |
| ZT Advisory Ltd | Professional & scientific | 2025 |
| ZT Prime Investments Ltd | Real estate | 2024 |
| ZT Repair and Maintanance Limited | Construction | 2024 |
| Ztech Enterprises Limited | Wholesale & retail | 2024 |
| Zu's Grill Ltd | Hospitality | 2019 |
| Zuana Services Limited | Construction | 2026 |
| Zubidot Ltd | Wholesale & retail | 2025 |
| Zubra Construction Ltd | Construction | 2016 |
| Zuche Pharmaceuticals Ltd | Wholesale & retail | 2023 |
| Zuha Services Ltd | Professional & scientific | 2018 |
| Zuhaib Khan Limited | Wholesale & retail | 2025 |