| With Care Weybridge Ltd | Hospitality | 2026 |
| WJB Estates UK Limited | Real estate | 2025 |
| WJG Holdings Limited | Financial services | 2022 |
| WJG Land & Developments Limited | Construction | 2025 |
| WJM Technologies Limited | Information & communication | 2023 |
| WK Management Consultants Limited | Professional & scientific | 2018 |
| WK Professional Risks Limited | Financial services | 2024 |
| WM Car Wash Ltd | Other services | 2021 |
| Woburn Building Company Ltd | Construction | 2024 |
| Wolfbrother Whisky Ltd | Wholesale & retail | 2021 |
| Wong's Builder Limited | Other services | 2010 |
| Wongcc Limited | Information & communication | 2008 |
| Woodcock Brothers (Holdings) Limited | Financial services | 2015 |
| Woodcock Brothers (Wimbledon) Limited | Construction | 1950 |
| Woodcock Brothers Investments Ltd | Construction | 2016 |
| Woodcock House Limited | Real estate | 2024 |
| Woodcote Management Company Limited | Households | 1978 |
| Woodenstone Surveying Limited | Professional & scientific | 2014 |
| Woodforth Developments Limited | Construction | 2024 |
| Woodforth Investments Limited | Real estate | 2020 |
| Woodland Ferrari Limited | Information & communication | 1990 |
| Woodland Grove Investments Limited | Financial services | 2026 |
| Woodland Way Weybridge Limited | Real estate | 2007 |
| Woodlands Contracting Limited | Construction | 2002 |
| Woodmancote Development Limited | Extraterritorial | 2015 |
| Woodridings Freehold Limited | Financial services | 2024 |
| Woods Place Ventures Ltd | Professional & scientific | 2012 |
| Woodstock Design & Construction Ltd | Construction | 2018 |
| Woodvale Tree Care Ltd | Agriculture & fishing | 2016 |
| Woojeong KIM Ltd | Wholesale & retail | 2019 |
| Workplace Engagement Solutions Ltd | Administrative & support | 2023 |
| Workstore Limited | Real estate | 2021 |
| World Class Furniture Limited | Professional & scientific | 2012 |
| Worldwide Securities Limited | Administrative & support | 1997 |
| WOT Locks Ltd | Manufacturing | 2021 |
| Wren Property Solutions Limited | Real estate | 2014 |
| WV Grand Group Limited | Real estate | 2019 |
| WV Investment Management Limited | Real estate | 2019 |
| WY Ventures Limited | Manufacturing | 2025 |
| Wyadup Limited | Construction | 2015 |
| Wyecliffe Galleries LLP | | 2016 |
| Wyvern Corporate Finance LLP | | 2023 |
| Wyvern Partners Group Limited | Professional & scientific | 2010 |
| Wyvern Partners Limited | Professional & scientific | 2008 |
| Xsport Coaching Ltd | Arts & recreation | 2010 |
| Xsport Global Ltd | Arts & recreation | 2012 |
| Xstratis Limited | Professional & scientific | 1997 |
| Xtramile-Uk Ltd | Transport & logistics | 2022 |
| Xylok Legal Limited | Professional & scientific | 2023 |
| Yaffle Holdings Limited | Financial services | 2024 |
| Yaffle Property Limited | Real estate | 2020 |
| YAR Group Ltd | Hospitality | 2025 |
| Yarag Limited | Arts & recreation | 2002 |
| YCC Property Services Ltd | Real estate | 2022 |
| Yeldham Investments Ltd | Professional & scientific | 2002 |
| Yendee Ltd | Hospitality | 2016 |
| YEU Travel Ltd | Extraterritorial | 2024 |
| YEW Tree Enterprises Limited | Construction | 2021 |
| Yoobra Limited | Manufacturing | 2021 |
| Yooobuild Ltd | Construction | 2019 |
| Yooodle Limited | Real estate | 2017 |
| Yoooserv Group Holdings Ltd | Hospitality | 2021 |
| York House (Cheam) Management Company Limited | Households | 2003 |
| York Place Traders Limited | Extraterritorial | 2021 |
| Your Choice Mortgage Services Limited | Financial services | 2002 |
| Your Own Cloud Limited | Information & communication | 2014 |
| Yourpromo Gifts Limited | Wholesale & retail | 2020 |
| YTL Logistics Consulting Limited | Transport & logistics | 2005 |
| Z&S Nuggetronics Ltd | Wholesale & retail | 2025 |
| Zafferano (Catering) Limited | Hospitality | 2003 |
| Zaimore Limited | Households | 2017 |
| Zalaris UK Limited | Information & communication | 1998 |
| Zaphod Investments Ltd | Real estate | 2021 |
| ZCG Ltd | Administrative & support | 2016 |
| ZED Property Ltd | Real estate | 2025 |
| Zedma Ltd | Professional & scientific | 2009 |
| Zell Corp Ltd | Professional & scientific | 2023 |
| Zephyr Digital EHS Limited | Information & communication | 2025 |
| Zerk Effects Limited | Professional & scientific | 2016 |
| Zerova Technologies UK Limited | Wholesale & retail | 2026 |
| Zesla Ltd | Health & social care | 2023 |
| Zetabyte (West) Holdings Ltd | Financial services | 2014 |
| Zetabyte (West) Ltd | Wholesale & retail | 2010 |
| Zhou & Co. Limited | Wholesale & retail | 2017 |
| Zinc Property Services Ltd | Real estate | 2025 |
| Zionstone Limited | Real estate | 1982 |
| Zionstone Properties Limited | Real estate | 2012 |
| Zionstone SUB Limited | Construction | 2017 |
| Zonsopgang Holding Limited | Financial services | 2025 |
| Zuza Living Ltd | Manufacturing | 2025 |
| ZYD Care Ltd | Financial services | 2023 |
| Zydacron (Europe) Limited | Manufacturing | 1996 |