| West London Finance Ltd | Financial services | 2012 |
| West London Grabs Limited | Construction | 2025 |
| West London Investment Properties Ltd | Real estate | 2012 |
| West London Management and Marketing Consultancy Ltd Limited | Manufacturing | 2018 |
| West London Medical Ltd | Education | 2019 |
| West London Motor Services Ltd | Wholesale & retail | 2020 |
| West London Recovery Ltd | Wholesale & retail | 2023 |
| West London Traders Ltd | Wholesale & retail | 2025 |
| West Steel Fabrications Limited | Manufacturing | 2016 |
| Westbourne Style Limited | Wholesale & retail | 2025 |
| Westcott Properties Limited | Real estate | 2018 |
| Westdrive Motors Ltd | Wholesale & retail | 2025 |
| Westec Group Ltd | Construction | 2014 |
| Westlake Property Limited | Real estate | 2018 |
| Westlondonbikes Ltd | Wholesale & retail | 2025 |
| Westminster Housing Solutions Limited | Real estate | 2019 |
| Westridge Corporation Limited | Administrative & support | 2010 |
| Westside Garage Ltd | Wholesale & retail | 2016 |
| WFP Capital Ltd | Professional & scientific | 2022 |
| Wharf House Management Limited | Real estate | 1997 |
| Whichev Limited | Manufacturing | 2019 |
| Whisk & Wonder Ltd | Wholesale & retail | 2025 |
| White Amber Palace Ltd | Wholesale & retail | 2025 |
| White Eagle Bedrooms and Kitchens Limited | Construction | 2024 |
| White Rock Healthcare Ltd | Health & social care | 2023 |
| Whitebrook Park Limited | Real estate | 2025 |
| Whitebull Ltd | Transport & logistics | 2020 |
| Whiz Business Solutions Ltd | Administrative & support | 2015 |
| Whizcraft Ltd | Administrative & support | 2015 |
| Wicked Deals Limited | Wholesale & retail | 2019 |
| Widdicombe Limited | Wholesale & retail | 2002 |
| Widei Films Limited | Information & communication | 2005 |
| William Peter Dsouza Ltd | Construction | 2022 |
| Willow Property Investments Ltd | Real estate | 2017 |
| Windows & Glass Solutions Ltd | Construction | 2008 |
| Wings of Aquila Ltd | Professional & scientific | 2023 |
| Winjoy Catering Limited | Hospitality | 2025 |
| Wise Look Ltd | Wholesale & retail | 2015 |
| Wise Prize Limited | Wholesale & retail | 2022 |
| Wise Utility Telecoms Limited | Information & communication | 2012 |
| Wishgarf Limited | Administrative & support | 2012 |
| Wispville Limited | Wholesale & retail | 1976 |
| Witchcraft Limited | Administrative & support | 2020 |
| Witek Windows Ltd | Construction | 2025 |
| Wizard Sleeve Bars (Essex) Limited | Hospitality | 2015 |
| WK Lighting Limited | Arts & recreation | 2014 |
| WK London Properties Ltd | Real estate | 2023 |
| WM Construction Ltd | Construction | 2024 |
| WOK & Falafeeloo Limited | Hospitality | 2026 |
| Woke Essence Living Ltd | Health & social care | 2025 |
| Wolska UK Ltd | Wholesale & retail | 2025 |
| Women's Synergy Group CIC | Other services | 2023 |
| Wonderful Arctic Mind Ltd | Wholesale & retail | 2022 |
| Woodmar Construction Ltd | Construction | 2022 |
| Woodnok Limited | Real estate | 2025 |
| Work Evolution Ltd | Real estate | 2025 |
| Workmantra Recruitments Limited | Administrative & support | 2026 |
| Workology Limited | Extraterritorial | 2023 |
| Workplace Hygiene Co Limited | Administrative & support | 2025 |
| World-Wanda Holdings Limited | Information & communication | 2025 |
| Worldwide ALL Canine Registry Ltd | Manufacturing | 2025 |
| WP Construction London Limited | Construction | 2015 |
| WP Ground Works Services Limited | Construction | 2025 |
| Wsmrm Limited | Construction | 2017 |
| WZ LAB Ltd | Wholesale & retail | 2026 |
| XAD Fibre Ltd | Information & communication | 2024 |
| Xecta IT Ltd | Information & communication | 2018 |
| Xequtive Tech Ltd | Information & communication | 2026 |
| Xero Residential Limited | Real estate | 2021 |
| XI Productions Ltd | Professional & scientific | 2016 |
| XN Builders Limited | Construction | 2017 |
| XO Travel Limited | Administrative & support | 2024 |
| Xtreme Technology Limited | Information & communication | 2019 |
| XXL Restaurant Ltd | Hospitality | 2017 |
| XYZ Marketing Limited | Wholesale & retail | 2020 |
| Y & B Bakery (Brent Street) Limited | Wholesale & retail | 2021 |
| Y & B Bakery Limited | Wholesale & retail | 2012 |
| Y & S Property Limited | Real estate | 2018 |
| Y & S Stone Ltd | Construction | 2022 |
| Y Alwandi Ltd | Health & social care | 2026 |
| Y.K. Waran Ltd | Construction | 2001 |
| Yabb Care Ltd | Health & social care | 2017 |
| Yadav and Azavedo Limited | Hospitality | 2025 |
| Yahaska Energy Services Limited | Professional & scientific | 2010 |
| Yannis & Robert Ltd | Construction | 2019 |
| Yarl Global Corporation Ltd | Real estate | 2018 |
| Yasin Cars Limited | Wholesale & retail | 2017 |
| Yatra Design Ltd | Information & communication | 2025 |
| YBA Consultants Ltd | Professional & scientific | 2020 |
| Yeading Pharma Limited | Wholesale & retail | 2025 |
| Yee-Haw Media Ltd | Information & communication | 2010 |
| Yellow Lion Ltd | Other services | 2016 |
| YES 99 Plus Ltd | Wholesale & retail | 2015 |
| Yeshivas Keser Hatorah | Other services | 2022 |
| Yeskia Ltd | Administrative & support | 2025 |
| Yira Ltd | Information & communication | 2018 |
| Ykky Limited | Construction | 2025 |
| YMA Constructions Ltd | Construction | 2018 |
| Yoad Ltd | Transport & logistics | 2023 |
| Yogi Wood Art Limited | Manufacturing | 2025 |