| Willandskill Limited | Professional & scientific | 2017 |
| Williams Sail Racing Limited | Arts & recreation | 2006 |
| Willow Beauty Products Limited | Wholesale & retail | 2005 |
| Wilverley Limited | Professional & scientific | 2022 |
| Wimbledon Investments Limited | Construction | 1986 |
| Winch Workshop Ltd | Manufacturing | 2023 |
| Winstone Engineering Co.Limited | Real estate | 1965 |
| Winter Sailing Limited | Arts & recreation | 2025 |
| Witness Films Limited | Information & communication | 2006 |
| WJD Engineering Ltd | Professional & scientific | 2018 |
| WM. Smith Exports Limited | Wholesale & retail | 1996 |
| Wmfg Property Ltd | Real estate | 2023 |
| WOK Inn 168 Ltd | Hospitality | 2023 |
| WOK Inn 2628 Ltd | Hospitality | 2026 |
| Woodcock & Harding Limited | Construction | 2015 |
| Woodcock Access and Parking Limited | Real estate | 2015 |
| Woodlands (Lyndhurst) Property Management Ltd | Households | 2025 |
| Woods New Forest Limited | Wholesale & retail | 2013 |
| Woodstock Engineering Limited | Wholesale & retail | 1967 |
| Woody Consulting Limited | Professional & scientific | 2011 |
| World of Glass Limited | Hospitality | 2003 |
| Worldwide Independent Network Limited | Information & communication | 2016 |
| Wpduk Ltd | Hospitality | 2025 |
| Wrap IT Modular Ltd | Other services | 2025 |
| Wright Build Developments Ltd | Construction | 2019 |
| Wrigley Properties Limited | Real estate | 2021 |
| Wunderlust Limited | Arts & recreation | 2019 |
| WVV Ltd | Professional & scientific | 2024 |
| Wykeham Place Management Company Limited | Households | 1967 |
| Xerus Labs Limited | Information & communication | 2026 |
| Xpel Marketing Ltd | Wholesale & retail | 2008 |
| Yacht Haven Marinas Limited | Arts & recreation | 2007 |
| Yacht Havens (Netherlands) Limited | Professional & scientific | 2013 |
| Yacht Management Services Limited | Manufacturing | 2023 |
| Yacht Ownership Solutions Limited | Other services | 1991 |
| Yachting Projects Ltd | Administrative & support | 2020 |
| Yachtmail Company Limited | Wholesale & retail | 1966 |
| Yates Infrastructure and Property Solutions Ltd | Information & communication | 2008 |
| Yawning Dog Productions Ltd | Construction | 2000 |
| Yeatton House (Downton) Management Company Limited | Administrative & support | 1977 |
| Yelgin Ltd | Professional & scientific | 2022 |
| Yellowstone Management Limited | Professional & scientific | 2009 |
| YO26HOMES Ltd | Real estate | 2021 |
| Young Swimming Pools Limited | Administrative & support | 2023 |
| YU XIN Ltd | Health & social care | 2010 |
| Zand & ZIN Ltd | Other services | 2024 |
| Zero Alpha Designs Ltd | Extraterritorial | 2021 |
| Zinka UK Limited | Wholesale & retail | 2012 |