| Wellbought Limited | Wholesale & retail | 2018 |
| Wellcom Property Investment Limited | Real estate | 1999 |
| Wellington Homes Limited | Hospitality | 2024 |
| Wellness Fusion CIC | Education | 2024 |
| Wendsbury Food and Wine Ltd | Other services | 2025 |
| Wentworth Lodge Developments Limited | Construction | 2021 |
| Wepham Homes Ltd | Real estate | 2022 |
| Wessex House Limited | Real estate | 2006 |
| West 12 Centre Ltd | Health & social care | 2020 |
| West Acton Superstores Limited | Wholesale & retail | 2006 |
| West Best 1 Limited | Hospitality | 2025 |
| West Best 10 Limited | Hospitality | 2018 |
| West END U.K. Ltd | Wholesale & retail | 2017 |
| West Enterprises London Ltd | Real estate | 2026 |
| West London Automotive Ltd | Wholesale & retail | 2024 |
| West London BED & Breakfast Ltd | Real estate | 2023 |
| West London Cakes Ltd | Wholesale & retail | 2025 |
| West London Cash & Carry Ltd | Wholesale & retail | 2022 |
| West London DUB Club Ltd | Arts & recreation | 2024 |
| West London Electrical Services Limited | Construction | 2025 |
| West London Freight Services Ltd | Transport & logistics | 2025 |
| West London GAS and Plumbing Limited | Construction | 2022 |
| West London Hitters Volleyball CIC | Arts & recreation | 2023 |
| West London Solicitors Ltd | Professional & scientific | 2012 |
| West Middlesex Club Limited(The) | Arts & recreation | 1976 |
| West Side Developers Ltd | Real estate | 2025 |
| West Windows & Plastic Centre Limited | Construction | 2017 |
| West Windows Glazing Limited | Construction | 2023 |
| Westell Investments Limited | Real estate | 2017 |
| Westend Buildrs Limited | Construction | 2019 |
| Western Banana Limited | Wholesale & retail | 2009 |
| Western Hardware Ltd | Wholesale & retail | 2018 |
| Western Hilton Roofing Ltd | Construction | 2025 |
| Western HUT Ltd. | Manufacturing | 2024 |
| Western International Market Tenants Association Limited | Other services | 1972 |
| Western Nails Ltd | Other services | 2023 |
| Westline Recruitment Ltd | Administrative & support | 2026 |
| Westpod Studio Ltd | Information & communication | 2025 |
| Westroofingboys Limited | Construction | 2025 |
| Westvigo Limited | Wholesale & retail | 2025 |
| Westwood Store Ltd | Wholesale & retail | 2026 |
| WEX Properties Limited | Real estate | 2024 |
| Weyshab Education and Training Limited | Education | 2012 |
| WG Beauty Services Limited | Other services | 2015 |
| WGS Services Ltd | Construction | 2026 |
| WHEELS4U Ltd | Wholesale & retail | 2021 |
| Whitby Drycleaning Ltd | Other services | 2019 |
| White by Mehar Limited | Professional & scientific | 2014 |
| White Cloud Laundry Dryer Ltd | Other services | 2021 |
| White Heaven Investment Ltd | Real estate | 2021 |
| White Heaven Ltd | Real estate | 2014 |
| White Hill Concrete Ltd | Manufacturing | 2022 |
| White Horse (Global) Limited | Wholesale & retail | 2012 |
| White House Accommodation Limited | Real estate | 2006 |
| White Tiger Consultant Limited | Education | 2022 |
| Whitegate Wholesale Limited | Wholesale & retail | 2024 |
| Whitetower Construction Limited | Real estate | 2019 |
| Who's Next Ltd | Wholesale & retail | 2015 |
| Wholesale Aesthetics Ltd | Other services | 2020 |
| Whoopit Limited | Information & communication | 2022 |
| WHS Trades Ltd | Wholesale & retail | 2025 |
| Wild West Grill & Steakhouse Ltd | Hospitality | 2018 |
| Wildra Ltd | Real estate | 2024 |
| Willowstone Property Management Ltd | Hospitality | 2025 |
| Wilmott Turner Financial Services Limited | Financial services | 2009 |
| Wiltonserve Limited | Real estate | 1997 |
| Wimbledon Chase Enterprise Ltd | Wholesale & retail | 2026 |
| Win-Doors INT Ltd | Construction | 2013 |
| Wind Turbine Inspection Ltd | Professional & scientific | 2021 |
| Window DIY Limited | Construction | 2023 |
| Windson International Limited | Wholesale & retail | 2024 |
| Winstone Estates Private Limited | Real estate | 2022 |
| Wires & Wireless Communications Limited | Information & communication | 2015 |
| Wise Property Solutions Limited | Real estate | 2025 |
| Wish Angel Boutique Ltd | Wholesale & retail | 2024 |
| Wishbeauty Limited | Wholesale & retail | 2019 |
| Wisk Construction London Limited | Construction | 2025 |
| Witley Motor Repair Centre Ltd | Other services | 2016 |
| Wizbuild Ltd | Construction | 2021 |
| Wizcore Ltd | Professional & scientific | 2023 |
| Wizzplumbing Limited | Construction | 2022 |
| WJ Essentials Limited | Wholesale & retail | 2025 |
| WJ Nestle CML. Limited | Real estate | 2019 |
| WJ Nestle Limited | Real estate | 2018 |
| Wk(Southall) Ltd | Wholesale & retail | 2025 |
| Wnterstorm Bites Ltd | Wholesale & retail | 2026 |
| Wobniar Ltd | Wholesale & retail | 2023 |
| Wocsom Forwarding Ltd | Transport & logistics | 2024 |
| Woksy Ltd | Hospitality | 2025 |
| Wolf Bar Ltd | Wholesale & retail | 2021 |
| Wolfgang Virtus Ltd | Wholesale & retail | 2025 |
| Wolfs Polish Limited | Wholesale & retail | 2018 |
| Women's Community Circle Ltd | Hospitality | 2025 |
| Wonder Living Limited | Wholesale & retail | 2017 |
| Wonderful Cleaning Ltd | Administrative & support | 2025 |
| Woodlands Offlicence and Groceries Limited | Wholesale & retail | 2011 |
| Woodridge House (Southall) Limited | Households | 2022 |
| Woodstock Angel Ltd | Real estate | 2026 |
| Woodward Holdings (Watford) Limited | Financial services | 2008 |
| Woodward Property Partnership LLP | | 2020 |