| Vyas Consulting Ltd | Information & communication | 2025 |
| W.B. Howlett (London) Limited | Real estate | 1946 |
| W.Carey Motor Engineers Limited | Wholesale & retail | 2023 |
| Waalimoo Limited | Wholesale & retail | 2018 |
| Wadhwa Property Management Ltd | Households | 2025 |
| Walaae Limited | Wholesale & retail | 2025 |
| Waldemar Gilas Ltd | Construction | 2021 |
| Walrus Core Ltd | Wholesale & retail | 2025 |
| Walrus Ecommerce Ltd | Wholesale & retail | 2023 |
| Walrus Media Ltd | Information & communication | 2024 |
| Walrus Video Production Ltd | Information & communication | 2025 |
| Wanduragala LLP | | 2025 |
| Warren Commercial Properties Limited | Construction | 2014 |
| Warren Heating and Plumbing Ltd | Construction | 2025 |
| Wash & CUT Salon Ltd | Other services | 2024 |
| Watan Properties Limited | Real estate | 2026 |
| Water Cloud Ltd | Real estate | 2018 |
| Watership Down Technologies Limited | Manufacturing | 2011 |
| Wavefront AI Ltd | Information & communication | 2025 |
| Waxbill Ltd | Extraterritorial | 2016 |
| Way 2 Save Isleworth Limited | Wholesale & retail | 2009 |
| Waymaker Transport Limited | Transport & logistics | 2024 |
| Wdesignonline Ltd | Professional & scientific | 2010 |
| Wdowczyk Ltd | Transport & logistics | 2018 |
| WE ARE Family Residential Services Ltd | Health & social care | 2023 |
| WE Ethnify Ltd | Professional & scientific | 2024 |
| WE Juice IT Limited | Wholesale & retail | 2019 |
| WE OUI Ventures Ltd | Manufacturing | 2025 |
| WE Rhyme Limited | Information & communication | 2023 |
| Webproducts Global Limited | Wholesale & retail | 2016 |
| Webturner Ltd | Information & communication | 2019 |
| Wedding Crashers Ltd | Information & communication | 2024 |
| Wedge Homes Limited | Construction | 1971 |
| Wedge Investments Limited | Real estate | 2005 |
| Wedidit Ltd | Professional & scientific | 2025 |
| Wehr MW Limited | Financial services | 2025 |
| Wendyandlouis Limited | Manufacturing | 2015 |
| West Cross Woodland House Ltd | Construction | 2019 |
| West London Accident Repair Ltd | Wholesale & retail | 2026 |
| West London Accounting W5 Ltd | Other services | 2024 |
| West London Campervan Hire Limited | Administrative & support | 2009 |
| West London Car Customs Ltd | Wholesale & retail | 2021 |
| West London Chambers of Commerce | Administrative & support | 2012 |
| West London Export Club Ltd | Extraterritorial | 2021 |
| West London MOT Centre Limited | Wholesale & retail | 2016 |
| West One Associates Limited | Professional & scientific | 2013 |
| West One Properties Management Limited | Households | 2017 |
| Westborne Distribution Ltd. | Manufacturing | 1998 |
| Westgate House RMC Ltd | Households | 2007 |
| Westmasters Ltd | Construction | 2016 |
| Wgjt Decorating Services Ltd | Construction | 2014 |
| Whitborne International Limited | Administrative & support | 2018 |
| White Coat Academy Ltd | Education | 2025 |
| Whitecross Health Limited | Health & social care | 2024 |
| Whitehall Advocates Ltd | Professional & scientific | 2026 |
| Whitestep Limited | Wholesale & retail | 2007 |
| Wholesalee Traders Ltd | Wholesale & retail | 2024 |
| Wickson Renovations Ltd | Real estate | 2015 |
| Widenoble Services Limited | Professional & scientific | 1993 |
| Wider Voices Limited | Information & communication | 2020 |
| Wight Hospitality Ltd | Hospitality | 2022 |
| Wighton Mews Residents Limited | Real estate | 1998 |
| WIL Merchanting Limited | Wholesale & retail | 2024 |
| William Rose & Co Ltd | Wholesale & retail | 2003 |
| William Rose EOT Limited | Administrative & support | 2021 |
| Willow&Foggs Limited | Real estate | 2025 |
| Willpower Estate Protection Ltd | Professional & scientific | 2011 |
| Willpower Storage Services Limited | Administrative & support | 1999 |
| Wimbledon Common Ltd | Information & communication | 2024 |
| Wincosolve Technologies Private Limited | Extraterritorial | 2013 |
| Winyard Design Ltd | Professional & scientific | 2026 |
| Wirebird Digital Ltd | Information & communication | 2025 |
| Wise Building Services Ltd | Construction | 2022 |
| Wisetap Ltd | Wholesale & retail | 2024 |
| WIT Car Repair Ltd | Wholesale & retail | 2015 |
| WIT Supplies Limited | Manufacturing | 2026 |
| Withey & Vedi Limited | Administrative & support | 1991 |
| Wizard Technology Consultants Limited | Information & communication | 2002 |
| WJ Imaging Ltd | Health & social care | 2017 |
| WJ Services Ltd | Administrative & support | 2025 |
| WLJ Events Limited | Administrative & support | 2021 |
| WLP Homecare Ltd | Construction | 2020 |
| Wolcar Ltd | Transport & logistics | 2015 |
| Wood Windows Restoration & Construction Ltd | Manufacturing | 2019 |
| Woodfield Properties London Ltd | Real estate | 2022 |
| Woodland Forest Property Limited | Real estate | 2022 |
| Woodlands Design Studio Limited | Manufacturing | 2017 |
| Woodstock Avenue Limited | Households | 2025 |
| Wootz Estates Limited | Real estate | 2025 |
| Work N Play Limited | Wholesale & retail | 2017 |
| Working.Holiday Ltd | Other services | 2016 |
| Workingspace Services Limited | Information & communication | 2016 |
| World Source International Limited | Professional & scientific | 2005 |
| Worton Construction Limited | Construction | 2020 |
| Worton Property Portfolio Ltd | Real estate | 2025 |
| Wosv 69 Limited | Wholesale & retail | 2026 |
| Wren Court (Bounds Green) Management Co Limited | Households | 2025 |
| WSM Consulting Group Ltd | Professional & scientific | 2018 |
| WTA London Limited | Extraterritorial | 2020 |
| Wuuhuu Retail Ltd | Wholesale & retail | 2025 |