| Warlingham Developments Two Limited | Professional & scientific | 2006 |
| Warner Mason Ltd | Real estate | 2016 |
| Warnham Arts Ltd | Information & communication | 2024 |
| Warren Health Consultancy Ltd | Professional & scientific | 2023 |
| Watsontelly Limited | Extraterritorial | 2012 |
| Waymaker Initiative CIC | Administrative & support | 2023 |
| Waymar Property Management Ltd | Construction | 2025 |
| WCF Consultants Ltd | Administrative & support | 2007 |
| WDA Accountants Ltd | Professional & scientific | 2025 |
| Webb Court Limited | Households | 1999 |
| Wellbore Wizard Ltd | Professional & scientific | 2023 |
| Werth & Partner Limited | Other services | 2019 |
| Wessons News Limited | Wholesale & retail | 2026 |
| West Ewell Ltd | Wholesale & retail | 2013 |
| Westcountrychimneys.Co.Uk Ltd | Administrative & support | 2024 |
| Whispers Bar and Grill Ltd | Hospitality | 2025 |
| Whitecastle Developments Ltd | Construction | 2014 |
| Wildman Brothers Limited | Financial services | 2007 |
| Wildman, Doman & Houston Limited | Financial services | 2016 |
| Windycroft Management Company Limited | Households | 2026 |
| Wireg Services Ltd | Professional & scientific | 2019 |
| Wise Logistics Limited | Transport & logistics | 2016 |
| Wise Printing Ltd | Manufacturing | 2025 |
| WK Purley Developments Limited | Financial services | 2021 |
| WK Purley Limited | Financial services | 2021 |
| WMM Media Limited | Arts & recreation | 2026 |
| Woisys Limited | Information & communication | 2025 |
| WOK Grill Ltd | Hospitality | 2026 |
| Wolfcraft Limited | Wholesale & retail | 1990 |
| Woodcote Apartments Freehold Limited | Real estate | 2019 |
| Woodcote Smith Limited | Professional & scientific | 2022 |
| Woodcote Studios Limited | Professional & scientific | 2016 |
| Woodville Advisory Ltd | Professional & scientific | 2022 |
| Woody's Farm Ltd | Agriculture & fishing | 2026 |
| Workforce Buddy Ltd | Professional & scientific | 2026 |
| Worksop Skyline Ltd | Real estate | 2025 |
| Wwimport Ltd | Wholesale & retail | 2023 |
| Xelatech UK Limited | Information & communication | 2019 |
| XLR8 Training Limited | Professional & scientific | 2016 |
| Xtra Global Ltd | Professional & scientific | 2025 |
| Xyphora Ltd | Wholesale & retail | 2024 |
| Yardhurst Logistics Ltd | Transport & logistics | 2019 |
| Yasmed Limited | Health & social care | 2021 |
| Yayati Consulting Limited | Information & communication | 2014 |
| YES 2 Pets Ltd | Wholesale & retail | 2025 |
| YEW & Maple Limited | Administrative & support | 2002 |
| YEW Tree (Financial Services) Limited | Financial services | 1996 |
| YIF Properties Ltd | Real estate | 2025 |
| Ykjvjhvj Ltd | Information & communication | 2026 |
| YLU UN Limited | Administrative & support | 2026 |
| YM Properties London Ltd | Real estate | 2021 |
| Young & Tender Ltd | Transport & logistics | 2015 |
| Your Maintenance Matters Limited | Manufacturing | 2025 |
| Your True Solution Limited | Administrative & support | 2014 |
| Youshenxin Investments Limited | Financial services | 2014 |
| Youshenxin Management Limited | Financial services | 2021 |
| Youthology Aesthetics Ltd | Health & social care | 2025 |
| YS Motors Ltd | Wholesale & retail | 2026 |
| Yudel Trading Limited | Wholesale & retail | 2013 |
| Yuuki&Co Ltd | Information & communication | 2024 |
| Z Gani Consultancy Ltd | Professional & scientific | 2024 |
| Zabbix Properties Limited | Real estate | 2020 |
| Zaidi Clinic Ltd | Real estate | 2026 |
| Zaidi Properties Limited | Hospitality | 2017 |
| Zaidi Smile Limited | Health & social care | 2021 |
| Zains Ltd | Construction | 2004 |
| Zamora UK Limited | Administrative & support | 2008 |
| ZAN Property Limited | Real estate | 2023 |
| Zarinab Consulting Ltd | Administrative & support | 2015 |
| Zarinab Properties Ltd | Real estate | 2022 |
| Zayd Education Ltd | Education | 2025 |
| Zedzen Ltd | Construction | 2024 |
| Zenrene Properties Ltd | Real estate | 2024 |
| Zenvino Ltd | Other services | 2026 |
| Zhjn Investments Limited | Real estate | 2025 |
| Zia-Gee Ltd | Information & communication | 2014 |
| Zips Properties Ltd | Real estate | 2024 |
| Zizah Ltd. | Arts & recreation | 2016 |
| Zjvyhgc Ltd | Information & communication | 2026 |
| Zuberi Properties Ltd | Real estate | 2021 |