| White Horse Education and Training Ltd | Education | 2012 |
| White Property & Advisory Ltd | Real estate | 2026 |
| White Stag Coaching Limited | Other services | 2013 |
| White Works 4 U Ltd | Professional & scientific | 2016 |
| Whitelock Consultancy Ltd | Professional & scientific | 2026 |
| Whitrow & Potter Estates Ltd | Real estate | 2020 |
| Whole Health Foods Ltd | Wholesale & retail | 2021 |
| Wickford Glass Ltd | Extraterritorial | 2025 |
| Wickham Engineering Hose & Hydraulics Limited | Manufacturing | 2007 |
| Wickham Flooring Limited | Other services | 1974 |
| Wildtrak Ltd | Wholesale & retail | 2023 |
| Wilfho Limited | Real estate | 2023 |
| William Charles Developments Ltd | Construction | 2018 |
| Willow & FOX Limited | Wholesale & retail | 2018 |
| Wilson & Anderson Financial Solutions Ltd | Financial services | 2025 |
| Wilson & Co Secretaries Limited | Professional & scientific | 2003 |
| WIN My Car Ltd | Wholesale & retail | 2026 |
| Wind Chime Properties Limited | Real estate | 2018 |
| Windsor Flooring Limited | Construction | 2020 |
| Wingrove's Limited | Wholesale & retail | 2024 |
| Winkle and Crab Limited | Real estate | 2012 |
| Winstanley Estate Limited | Real estate | 1987 |
| Wireless Music Ltd | Information & communication | 2003 |
| Wisdom Within Limited | Wholesale & retail | 2007 |
| Wise Monkey Automotive Ltd | Wholesale & retail | 2026 |
| Witham Glass Limited | Extraterritorial | 2009 |
| Witney Motor Company Limited | Agriculture & fishing | 2010 |
| WJA Roofing Limited | Manufacturing | 2026 |
| WLH Solutions Limited | Construction | 2014 |
| WML Contracts Ltd | Construction | 2023 |
| Wong Chinese Ltd | Hospitality | 2022 |
| Wood Property Management Limited | Real estate | 1982 |
| Woodgate (Abbey) Limited | Real estate | 2019 |
| Woodgate (AR TH) 5 Limited | Real estate | 2019 |
| Woodgate (AR TH) 6 Limited | Real estate | 2019 |
| Woodgate (AR TH) 7 Limited | Real estate | 2019 |
| Woodgate 2025 Ltd | Real estate | 2022 |
| Woodgate 2026 Ltd | Real estate | 2022 |
| Woodgate Group Holdings Ltd | Financial services | 2024 |
| Woodgate Investments (2) Limited | Real estate | 2017 |
| Woodgate Southern Ltd | Construction | 2016 |
| Woodham Design Limited | Wholesale & retail | 2021 |
| Woodham Lodge Management Limited | Administrative & support | 2012 |
| Woodland Entertainment Limited | Transport & logistics | 2004 |
| Woodland Global Ltd | Transport & logistics | 1988 |
| Woodland Group Holdings Limited | Professional & scientific | 2022 |
| Woodland Group Limited | Transport & logistics | 2005 |
| Woodland International Transport Co Limited | Professional & scientific | 1996 |
| Woodland Logistics Ltd | Transport & logistics | 2004 |
| Woodland Media Limited | Professional & scientific | 2013 |
| Woodland Risk Services Limited | Other services | 2006 |
| Woodrolfe Boatyard Limited | Administrative & support | 2006 |
| Woodside Securities Limited | Real estate | 1998 |
| Woodward Technical Services Limited | Professional & scientific | 2014 |
| Woodwardgraphics Ltd | Manufacturing | 2024 |
| Woof & Co Boutique Ltd | Wholesale & retail | 2026 |
| Workaround Literacy Ltd | Education | 2024 |
| Working for Wellbeing Ltd | Education | 2010 |
| World Famous Dive Bars Ltd | Hospitality | 2023 |
| Worldwide Book Services Limited | Transport & logistics | 2003 |
| Wright Tech (Essex) Limited | Construction | 2020 |
| WS Holdings Limited | Administrative & support | 2009 |
| WTC Logistics Holding Ltd | Financial services | 2024 |
| Wyvern Facility Maintenance Limited | Construction | 1998 |
| Xcelsior Properties Limited | Real estate | 2022 |
| Xenomorph Holdings Limited | Information & communication | 1995 |
| Xenomorph Software Limited | Information & communication | 1996 |
| Xform Ltd | Information & communication | 2005 |
| Xiqing Hardware Co., Limited | Administrative & support | 2022 |
| Xtreme Customs Developments Ltd | Wholesale & retail | 2014 |
| Xtreme Fitness Ltd | Arts & recreation | 2011 |
| YAD Building and Construction Limited | Construction | 2016 |
| YAD Capital Investments (Cleaning) Ltd | Financial services | 2026 |
| YAD Capital Investments (Engineering) Ltd | Financial services | 2025 |
| YAD Capital Investments (Print) Ltd | Financial services | 2026 |
| YAD Capital Investments (Tools) Limited | Financial services | 2025 |
| YAD Capital Investments Ltd | Financial services | 2022 |
| YAD Estates UK Holdings Ltd | Real estate | 2019 |
| YAD Property Group Ltd | Real estate | 2024 |
| YAD WT Investments Limited | Real estate | 2020 |
| Yappyeverafter Dog Grooming Ltd | Other services | 2024 |
| Yardley Engineering Ltd | Professional & scientific | 2010 |
| Yarham Construction Ltd | Construction | 2025 |
| YEO Digital Solutions Ltd | Information & communication | 2025 |
| YES Boat Limited | Professional & scientific | 2010 |
| Yiwu Dongqing Import and Export Co., Ltd | Administrative & support | 2024 |
| YOU Come First Ltd | Health & social care | 2023 |
| YOU Wellbeing - Dunmow Ltd | Health & social care | 2024 |
| YOU Wellbeing Ltd | Health & social care | 2017 |
| Your Elegant Occasions Limited | Other services | 2012 |
| Your Next Car Online Limited | Information & communication | 2020 |
| Zanjabeel Translations Ltd | Information & communication | 2021 |
| Zanobini Tools Ltd | Wholesale & retail | 2012 |
| Zarges (UK) Limited | Wholesale & retail | 1972 |
| Zedlabz Ltd | Wholesale & retail | 2022 |
| Zeneco Limited | Real estate | 2014 |
| Zenith Doors Industrial Limited | Construction | 1995 |
| Zenxi Oriental Ltd | Hospitality | 2024 |
| Zenxi Services Ltd | Hospitality | 2024 |
| Zhiyuan Lucky Co., Ltd | Administrative & support | 2024 |