| W J S Improvements Ltd | Construction | 2024 |
| W J Supplies Limited | Construction | 2005 |
| W L Heating Ltd | Construction | 2022 |
| W L Homes Ltd | Real estate | 2024 |
| W S Carpentry & Joinery Ltd | Construction | 2020 |
| W S R Recruitment Limited | Administrative & support | 2001 |
| W Squared Events Ltd | Administrative & support | 2017 |
| W Thompson Accounting Limited | Professional & scientific | 2016 |
| W Wade Freight Ltd | Transport & logistics | 2023 |
| W&J Global Ltd. | Manufacturing | 2011 |
| W. H. COX & SON (Removals & Storage) Ltd | Transport & logistics | 2007 |
| W.A.Farm Supplies Limited | Administrative & support | 1963 |
| W.F.I. Trading Limited | Transport & logistics | 2000 |
| W.M.M. Enterprises Limited | Other services | 1999 |
| W.P.B. Contractors Limited | Construction | 1991 |
| W.R.Grant & Sons Limited | Real estate | 1959 |
| W.S.Furnival(Brookland)Limited | Agriculture & fishing | 1971 |
| W.T.U. Limited | Construction | 2014 |
| W4 Construction Limited | Construction | 2011 |
| W4 Eggs Ltd | Extraterritorial | 2013 |
| Waakye Joint Ashford Ltd | Hospitality | 2024 |
| Wadesons Ltd | Administrative & support | 2004 |
| Wagtail Doggy Daycare Ltd | Other services | 2020 |
| WAH Productions Ltd | Information & communication | 2025 |
| Waitt Burgate Partnership Limited | Construction | 2016 |
| Waitt Capital (66 NDR) Limited | Construction | 2017 |
| Waitt Capital Limited | Extraterritorial | 2013 |
| Waitt Estates (57ANDR) Limited | Construction | 2017 |
| Waitt Estates Limited | Construction | 2014 |
| Wake UP (UK) Limited | Professional & scientific | 2013 |
| Wake UP Your Wealth LLP | | 2016 |
| Wakelin Homes Limited | Real estate | 2013 |
| Walia Enterprises Limited | Wholesale & retail | 2012 |
| Walkease Limited | Health & social care | 2026 |
| Walker Rail Ltd | Extraterritorial | 2020 |
| Walkingwomen (2021) Limited | Administrative & support | 2021 |
| Wallguard Systems Limited | Construction | 2017 |
| Wallis Freight Limited | Transport & logistics | 2015 |
| Wallpaper Online Limited | Wholesale & retail | 2019 |
| Walsun NRG Ltd | Administrative & support | 2025 |
| Walter Geering Limited | Wholesale & retail | 2018 |
| Walters (Kent) Limited | Other services | 2021 |
| Walton Plumbing & Heating Limited | Professional & scientific | 2011 |
| WAM (RAY) Limited | Real estate | 2013 |
| Wanb Limited | Health & social care | 2015 |
| Wanhe Limited | Wholesale & retail | 2021 |
| Wanstall Holdings Limited | Financial services | 2018 |
| Wanstall Ltd | Construction | 2017 |
| Ward Utilities Ltd | Other services | 2019 |
| Warehorne Vineyard Limited | Agriculture & fishing | 1997 |
| Warnes London Costs Consultants Ltd | Professional & scientific | 2001 |
| Warpco Ltd | Information & communication | 2025 |
| Warrens Window Cleaning Ltd | Administrative & support | 2025 |
| Warrior One Wellbeing Limited | Health & social care | 2022 |
| WAS Associates Ltd | Transport & logistics | 2022 |
| WAS Music Limited | Information & communication | 2010 |
| WAS Sandgate Limited | Hospitality | 2009 |
| Wash 2 YOU Ltd | Administrative & support | 2025 |
| Washroom Perception Ltd | Wholesale & retail | 2012 |
| WATCH114 Limited | Information & communication | 2018 |
| Watchous Designs Limited | Professional & scientific | 2025 |
| Water Cremation Ltd | Professional & scientific | 2020 |
| Water Direct Management Limited | Administrative & support | 2000 |
| Water Environmental Engineers Ltd | Construction | 2025 |
| Water Oakley Escapes Ltd | Hospitality | 2026 |
| Waterbrook Park (Parcel a) Limited | Construction | 2021 |
| Waterbrook Park Truckstop Limited | Construction | 2026 |
| Waterfield Collection Limited | Manufacturing | 2026 |
| Waterfield Hill Limited | Financial services | 2025 |
| Waterhouse Strong Ltd | Transport & logistics | 2006 |
| Watermain Solutions South East Limited | Construction | 2017 |
| Waterman Coaching and Consultancy Ltd | Professional & scientific | 2021 |
| Watermelons After Dark Limited | Hospitality | 2024 |
| Watermill Court Management Limited | Households | 2017 |
| Watermill Court Phase 2 Management Limited | Households | 2017 |
| Waters Edge Trading Limited | Professional & scientific | 2015 |
| Watling Street Freehold Limited | Real estate | 2006 |
| Watmore and Co. Accounting Ltd | Professional & scientific | 2023 |
| Watmore and Co. Holding Limited | Financial services | 2025 |
| Watson & Wellings Ltd. | Professional & scientific | 2016 |
| Watson Building Services Limited | Construction | 2018 |
| Watson Properties (Ascot) Limited | Real estate | 2021 |
| Watson Property Partnership (Ascot) LLP | | 2021 |
| Watt & Wire Electrical Limited | Construction | 2026 |
| Watts Associates Limited | Information & communication | 2009 |
| Watts Glazing Ltd | Construction | 2026 |
| Waxpack Limited | Wholesale & retail | 2015 |
| Way to Services Ltd | Administrative & support | 2022 |
| Wayne Bushnell Horsemanship Limited | Other services | 2023 |
| Wbgb Plumbing Ltd | Construction | 2020 |
| WBM Scaffolding Limited | Construction | 2024 |
| WBM South East Limited | Construction | 2019 |
| WCW Consulting Limited | Professional & scientific | 2025 |
| WDS255 Services Ltd | Construction | 2020 |
| WE Buy IT for More Ltd | Wholesale & retail | 2023 |
| WE FIX Double Glazing Ltd | Wholesale & retail | 2024 |
| WE Love Aesthetics Ltd | Other services | 2019 |
| WE Rave Sober Ltd | Wholesale & retail | 2025 |
| WE Recycle (UK) Limited | Extraterritorial | 2006 |
| WE Sell by the Sea Ltd | Wholesale & retail | 2023 |