| Wimbledon Car Services Limited | Transport & logistics | 2017 |
| Wimbledon Plumbing and Heating Ltd | Construction | 2021 |
| WIN 360 Consulting Ltd | Professional & scientific | 2023 |
| Winchester House RTM Company Limited | Households | 2025 |
| Winchmore Tutors Ltd | Administrative & support | 2008 |
| Winder Consulting Limited | Information & communication | 2004 |
| Windies Foods Ltd | Hospitality | 2026 |
| Winding Wheel Limited | Real estate | 2017 |
| Windmill Business Services Ltd | Professional & scientific | 2015 |
| Windmill Walk (Langney) Management Company Limited | Households | 2011 |
| Windowgenies Ltd | Construction | 2020 |
| Windows to Fit Ltd | Construction | 2019 |
| Windrose M-M LLP | | 2021 |
| Windsor Court (Whyteleafe) Management Company Limited | Real estate | 1993 |
| Windyhill Ltd | Wholesale & retail | 2025 |
| Wine With Words Limited | Wholesale & retail | 2020 |
| Winning Ways Formula Footy Tots Limited | Extraterritorial | 2001 |
| Winscott Construction Ltd | Construction | 2023 |
| Winter Consultancy Ltd | Information & communication | 2019 |
| Wisebird Communication Limited | Professional & scientific | 2024 |
| Wiser Human Ltd | Information & communication | 2024 |
| Wiwi UK Limited | Wholesale & retail | 2024 |
| WJH Investment Consulting Limited | Financial services | 2003 |
| Wjon Ltd | Financial services | 2025 |
| Wklandscaping Ltd | Administrative & support | 2024 |
| WLC Couriers Ltd | Transport & logistics | 2021 |
| Wobk Workshop Services Limited | Wholesale & retail | 2014 |
| Wolsey House Construction Limited | Construction | 2022 |
| Wolsey House Consultancy Limited | Construction | 2022 |
| Wolsey House Designs Limited | Professional & scientific | 2020 |
| Wolsey House Group Limited | Real estate | 2022 |
| Women in Business International Limited | Professional & scientific | 2023 |
| Women in Middle East North Africa Limited | Professional & scientific | 2023 |
| Wonder Setup Limited | Construction | 2023 |
| Wonder Studios Ltd | Professional & scientific | 2017 |
| Wonderful World Ltd | Real estate | 2022 |
| Wonderkid Studios Ltd | Information & communication | 2023 |
| Wong.Media Ltd | Information & communication | 2024 |
| Wood Lodge Wimbledon (Freehold) Limited | Households | 2010 |
| Wood West Management Limited | Real estate | 2009 |
| WOOD2METAL Limited | Manufacturing | 2018 |
| Woodcote Close Management Company Limited | Real estate | 2000 |
| Woodcote Collective Limited | Professional & scientific | 2022 |
| Woodcote Medical Services Limited | Health & social care | 2010 |
| Woodcote Park GC Pro Shop Limited | Wholesale & retail | 2022 |
| Woodflame Limited | Construction | 2017 |
| Woodham House Limited | Real estate | 1999 |
| WOODHAM45 Limited | Construction | 2026 |
| Woodhill Management Company Ltd | Households | 2019 |
| Woodlands Estate Agents Limited | Real estate | 2004 |
| Woodlands Gardens Management Company Limited | Households | 2000 |
| Woodlands Lettings Limited | Real estate | 2003 |
| Woodlands Maintenance Company Limited | Professional & scientific | 1968 |
| Woodlands Road 1 Limited | Construction | 2025 |
| Woodroffe Close Management Company Limited | Households | 2019 |
| Woods for the Trees Communications Limited | Administrative & support | 2005 |
| Woods Walls & Ceilings Ltd | Construction | 2024 |
| Woolgar & Turner Mortgages Limited | Financial services | 2024 |
| Wootton Place (Esher) Management Company Limited | Households | 2012 |
| Worcester Park Football Club Ltd | Arts & recreation | 2025 |
| Workingmen's CUB Limited | Hospitality | 2005 |
| Workplacecultureclub Ltd | Education | 2025 |
| World Mate | Education | 1999 |
| World Mission Society Church of GOD | Health & social care | 2010 |
| World of Roofing Ltd | Construction | 2022 |
| World Wide Power and Energy Limited | Other services | 2015 |
| Worldmate Services Limited | Education | 2000 |
| Wormhill Farm Limited | Arts & recreation | 2003 |
| WORPLE27 Limited | Households | 2014 |
| Worth House Properties Limited | Real estate | 1998 |
| Worth Recruiting Limited | Extraterritorial | 2020 |
| Worth Recruitment Limited | Extraterritorial | 2020 |
| Worthco Ltd | Construction | 2021 |
| Wpwp Peace Pathway Limited | Arts & recreation | 2012 |
| Wright Family Property Company Ltd | Real estate | 2022 |
| WS Motorcycles Ltd | Wholesale & retail | 2024 |
| WSM Cleaning Services Limited | Administrative & support | 2017 |
| WSP Legal Limited | Professional & scientific | 2013 |
| WTP Memorials Limited | Other services | 2007 |
| Wulf & Eadwacer Theatre Ltd | Arts & recreation | 2022 |
| WW Construction Ltd | Construction | 2026 |
| Wwfx UK Limited | Information & communication | 2018 |
| Wyatt Build and Development Ltd | Construction | 2021 |
| Wyatt Dixon Homes Ltd | Administrative & support | 2023 |
| Wych Hill Park Management Ltd | Households | 1999 |
| Wynford Place (Belvedere) Management Company Limited | Real estate | 1987 |
| Xcelence Therapy Ltd | Wholesale & retail | 2026 |
| XIA Guang Ltd | Hospitality | 2025 |
| XL Marlin Lighting Limited | Manufacturing | 2025 |
| Xolent Scaffolding Services Limited | Construction | 2013 |
| Xpert Cars Limited | Transport & logistics | 2013 |
| Xpertease Software Ltd | Information & communication | 2024 |
| XPM Investment Consulting Ltd | Financial services | 2015 |
| Xrai Futures Limited | Manufacturing | 2026 |
| Xydas Investments Ltd | Real estate | 2021 |
| Xydas Technical Limited | Professional & scientific | 2021 |
| Y2X Investment Advisory Limited | Information & communication | 2015 |
| Yakemba Productions Limited | Professional & scientific | 2017 |
| Yalcinstore Ltd | Wholesale & retail | 2022 |
| Yanny Travel Consultants Limited | Professional & scientific | 2019 |