| Welldone Development Ltd | Real estate | 2018 |
| Wellness Vacations Ltd | Administrative & support | 2022 |
| Wemade Solutions Ltd | Professional & scientific | 2021 |
| Wensons Legacy Ltd | Professional & scientific | 2020 |
| Wensons Ltd | Professional & scientific | 2022 |
| West Builder Ltd | Construction | 2026 |
| West Drayton Activity Centre Limited | Health & social care | 2025 |
| West Drayton Barbers Ltd | Other services | 2023 |
| West Drayton Body Works Ltd | Wholesale & retail | 2020 |
| West Drayton Development Limited | Real estate | 2024 |
| West Drayton Fast Food Limited | Hospitality | 2025 |
| West Drayton Kebab Centre Ltd | Hospitality | 2022 |
| West Drayton MOT Centre Ltd | Wholesale & retail | 2025 |
| West Drayton Tutors Ltd | Education | 2023 |
| West LDN Construction Ltd | Construction | 2020 |
| West London Self-Storage Ltd | Transport & logistics | 2018 |
| West Middlesex Glass Company Limited | Construction | 1986 |
| West Middlesex Motorcycles Limited | Wholesale & retail | 2010 |
| West Prius Cars Ltd | Wholesale & retail | 2019 |
| West Properties Investment Ltd | Real estate | 2023 |
| West Street Market Ltd | Wholesale & retail | 2025 |
| Westbound Cars Ltd | Wholesale & retail | 2021 |
| Western-Attire Ltd | Wholesale & retail | 2025 |
| Westgate Executive Chauffeur Service LLP | | 2011 |
| Westside Autos Ltd | Wholesale & retail | 2019 |
| Westside Creative Media Ltd | Information & communication | 2012 |
| Whale Global Freight Limited | Transport & logistics | 2013 |
| Whatnot Ltd | Information & communication | 2013 |
| White Horse Property Investments Limited | Real estate | 2019 |
| Whitesky Limited | Information & communication | 2015 |
| Whole Food Suppy Ltd | Hospitality | 2014 |
| WHOLESALE4U Ltd | Wholesale & retail | 2023 |
| Wilkes Carpentry Ltd | Construction | 2019 |
| William Boyer & Sons, Limited | Real estate | 1926 |
| Winclin Global Limited | Wholesale & retail | 2025 |
| Window Innovations Limited | Other services | 2026 |
| Wine Brew Ltd | Wholesale & retail | 2024 |
| Winkelen Ltd | Wholesale & retail | 2022 |
| Winnie Lighting Ltd | Arts & recreation | 2020 |
| Winnie Locum Health Limited | Health & social care | 2020 |
| Winning Streak IT Services Ltd | Information & communication | 2015 |
| Wired Global Limited | Information & communication | 2011 |
| Wiretech (UK) Limited | Real estate | 2005 |
| Wise Direction Chauffeuring Ltd | Transport & logistics | 2022 |
| Wise Removals Limited | Transport & logistics | 2025 |
| Wizborn Consultants Ltd | Professional & scientific | 2011 |
| Wizborn Ltd | Administrative & support | 2020 |
| WL Appliances Limited | Other services | 2023 |
| WMS EH Consultants Ltd | Information & communication | 2015 |
| Wohz Ltd | Hospitality | 2025 |
| Wonders of Blue Planet UK Ltd | Agriculture & fishing | 2024 |
| Woodbray Limited | Professional & scientific | 2019 |
| Woodnest Studio Ltd | Wholesale & retail | 2025 |
| Woofie Tweats Ltd | Hospitality | 2020 |
| Worth Worldwide Logistics UK Private Limited | Transport & logistics | 2025 |
| Woud Group Limited | Professional & scientific | 2025 |
| Wpharvest Ltd | Wholesale & retail | 2020 |
| Wssg Holding PVT Ltd | Real estate | 2025 |
| Www.Britainairporttransfer.Co.Uk Limited | Transport & logistics | 2017 |
| Www.Hireasuit.Co.Uk Ltd | Wholesale & retail | 2008 |
| Xevy Media PVT Ltd | Information & communication | 2024 |
| XG Communications Ltd | Information & communication | 2012 |
| Xpoints Ltd | Wholesale & retail | 2026 |
| Xpress Logistic Services Ltd | Transport & logistics | 2015 |
| Y & R Executive Ltd | Transport & logistics | 2020 |
| Yacoub Limited | Hospitality | 2023 |
| Yammi Ltd | Wholesale & retail | 2022 |
| Yammi Vending Ltd | Manufacturing | 2023 |
| Yanom Limited | Administrative & support | 2019 |
| YAR Hire Ltd | Transport & logistics | 2018 |
| Yaseen 1 Ltd | Hospitality | 2019 |
| Yasmeen Service Ltd | Administrative & support | 2023 |
| Yassh Comm Limited | Information & communication | 2012 |
| Yavewari Limited | Professional & scientific | 2019 |
| YDL Property Success Ltd | Real estate | 2019 |
| YEM Constructions Ltd | Construction | 2025 |
| YES Exchange Limited | Information & communication | 2018 |
| YES Global Ltd | Transport & logistics | 2024 |
| YES Marble Limited | Construction | 2014 |
| Yevhen Ltd | Real estate | 2025 |
| Yiewsley Foods Ltd | Wholesale & retail | 2026 |
| Yiewsley Fresh Halal Meat Ltd | Wholesale & retail | 2024 |
| Yiewsley Gogo Ltd | Hospitality | 2025 |
| Yiewsley Sushi Bar Limited | Hospitality | 2023 |
| Ying WAH Homes Ltd | Real estate | 2024 |
| Yodha Roofing Limited | Construction | 2024 |
| York Arcade Logistics Ltd | Transport & logistics | 2013 |
| YOU Grow ME Ltd | Professional & scientific | 2025 |
| Young Deus Ltd | Wholesale & retail | 2020 |
| Your Electrician Ltd | Construction | 2006 |
| Your Land Limited | Construction | 2022 |
| Z&A Shop Ltd | Extraterritorial | 2024 |
| Z&Ps Construction Ltd | Construction | 2018 |
| Z-Decorating Ltd | Construction | 2019 |
| Z5 Logistics Limited | Transport & logistics | 2020 |
| Zachs Barbershop Ltd | Other services | 2026 |
| Zackery Robert Hotels Limited | Hospitality | 1978 |
| Zainabhaya Limited | Wholesale & retail | 2026 |
| Zarah Services Limited | Wholesale & retail | 2022 |
| Zari Weddings Limited | Administrative & support | 2025 |