| Wearsmart Limited | Wholesale & retail | 1989 |
| Wearwolf Clothing Limited | Wholesale & retail | 2018 |
| Weaverfish Limited | Real estate | 2021 |
| Web & Tech Solutions Limited | Other services | 2019 |
| Web DEV Sphere Ltd | Professional & scientific | 2017 |
| Web Dimensions Limited | Information & communication | 2016 |
| Web Search Media Ltd | Information & communication | 2016 |
| WEB24 Digital Brands Ltd | Professional & scientific | 2019 |
| Webb Mechanical Ltd | Construction | 2011 |
| Webb Scenic Carpentry Ltd | Manufacturing | 2024 |
| Webbmech Properties Ltd | Real estate | 2017 |
| Webe Limited | Information & communication | 2012 |
| Webe Properties Ltd | Real estate | 2025 |
| Webinfo Systems Ltd | Information & communication | 2013 |
| Webintrix Limited | Information & communication | 2011 |
| Webmantra Ltd | Information & communication | 2007 |
| Webmark Ltd | Information & communication | 2013 |
| Webringly Ltd | Information & communication | 2025 |
| Website Designing Services Limited | Information & communication | 2015 |
| Websposure Ltd | Information & communication | 2004 |
| Webverse Limited | Wholesale & retail | 2023 |
| Webzeasy Limited | Professional & scientific | 2022 |
| WECARE4CARERS C.I.C. | Other services | 2023 |
| WED in Style (Perivale) Ltd | Other services | 2014 |
| WED in Style Gants Hill Limited | Other services | 2010 |
| Wed-In-Style (Leicester) Limited | Other services | 2009 |
| Wed-In-Style (Tooting) Ltd | Other services | 2010 |
| Wed-In-Style Limited | Other services | 2003 |
| Wedding Shedding Limited | Information & communication | 2023 |
| Wedge Properties Ltd | Households | 2023 |
| Wednesbury Ventures Ltd | Real estate | 2022 |
| Weeds of London Ltd | Professional & scientific | 2022 |
| Weeksbridge Capital Limited | Financial services | 2022 |
| Weerideuk Limited | Wholesale & retail | 2008 |
| Weexa Limited | Information & communication | 2019 |
| Wehustle Productions Limited | Information & communication | 2020 |
| Weightnomore Limited | Wholesale & retail | 2023 |
| Weird Wolf Games Ltd | Wholesale & retail | 2023 |
| Welcome Chicken Shop Ltd | Hospitality | 2024 |
| Welcome Hair Salon (Harrow) Ltd | Other services | 2017 |
| Welcomespace Property Management Limited | Households | 1993 |
| Welders & Welding Solutions Limited | Manufacturing | 2023 |
| Weldin 3 Properties Limited | Real estate | 2020 |
| Weldin Estates Limited | Real estate | 2025 |
| Weldon Crescent Ltd | Real estate | 2016 |
| Welfare 4 Hire Ltd | Administrative & support | 2010 |
| Welfare Limited | Wholesale & retail | 1986 |
| Welford Chase Estates Limited | Hospitality | 2023 |
| Well Done Builders Limited | Construction | 2025 |
| Well Done Cleaning Limited | Administrative & support | 2004 |
| Well Safe Trading Limited | Wholesale & retail | 2026 |
| Wellbeing B2B Limited | Administrative & support | 2019 |
| Wellbuy Limited | Other services | 2017 |
| Wellcare Pharma Ltd | Wholesale & retail | 2020 |
| Wellcome Estates Limited | Real estate | 2002 |
| Welldon Activity Group | Health & social care | 2001 |
| Welldon Kids Club Limited | Education | 2026 |
| Wellington London Limited | Real estate | 2015 |
| Wellington Peak Limited | Hospitality | 2014 |
| Wellington Spine Limited | Health & social care | 2007 |
| Wellness Communications Ltd | Professional & scientific | 2020 |
| Wellora Services Limited | Administrative & support | 2026 |
| Wellpoint Health Ltd | Information & communication | 2025 |
| Wellveer Ltd | Wholesale & retail | 2026 |
| Weltec Engineering(Uk) Ltd | Construction | 2010 |
| Wemb Ltd | Real estate | 2015 |
| Wembley Central Halal Meat & Bakery (UK) Ltd | Manufacturing | 2020 |
| Wembley Family Church | Other services | 2008 |
| Wembley Group Plastering Ltd | Construction | 2025 |
| Wembley Investments 511 Limited | Real estate | 2025 |
| Wembley Park Car Wash Ltd | Wholesale & retail | 2022 |
| Wembley Park Restaurants Limited | Hospitality | 2020 |
| Wentworth Aesthetics Ltd | Health & social care | 2018 |
| Wentworth Properties Ltd | Real estate | 2019 |
| WEP Two Ltd | Households | 2023 |
| Wepadel for Sports Ltd | Wholesale & retail | 2026 |
| WERECRUIT4YOU Ltd | Administrative & support | 2025 |
| Wershahs Limited | Real estate | 2022 |
| Werth Represents Ltd | Administrative & support | 2021 |
| Wesell Businesses Limited | Administrative & support | 2001 |
| Wesend Ltd | Information & communication | 2025 |
| Wessex@Ragvnall Limited | Construction | 2025 |
| West 1 Property Ltd | Real estate | 2024 |
| West 6 Auto Centre Limited | Other services | 2012 |
| West Benz Motors Ltd | Wholesale & retail | 2025 |
| West Buildings Holdings Limited | Real estate | 2025 |
| West Court Residents' Association (Harrow) Limited | Households | 1990 |
| West Drayton (Waterside) Management Company Limited | Real estate | 2014 |
| West Ealing Community CIC | Administrative & support | 2016 |
| West Ealing Properties Ltd. | Real estate | 2020 |
| West END Building Solutions Ltd | Construction | 2018 |
| West END Consultants UK Limited | Professional & scientific | 2008 |
| West END Residential Property (2) Ltd | Real estate | 2014 |
| West END Road (Ruislip) Management Company Limited | Real estate | 2006 |
| West END UK Builders Limited | Construction | 2018 |
| West England Construction Limited | Construction | 2026 |
| West Green House Limited | Arts & recreation | 2004 |
| West Harrow Park Pre-School Ltd. | Health & social care | 2016 |
| West London City Lets Limited | Real estate | 2014 |
| West London Foods Ltd | Hospitality | 2018 |