| Walfins Limited | Administrative & support | 1997 |
| Walford Management Services Ltd | Hospitality | 2022 |
| Waliaz Holdings Ltd | Real estate | 2025 |
| Walker Associates (Swindon) Limited | Construction | 2017 |
| Walker Family Estate Limited | Real estate | 2024 |
| Walking Moon Ltd | Real estate | 2026 |
| Wallace Luxury Car Hire Limited | Administrative & support | 2025 |
| Walmart Ltd | Wholesale & retail | 2019 |
| Walmat Windows Limited | Construction | 2015 |
| Walrus Marketing Ltd | Information & communication | 2023 |
| Walsall Karate Dojo LLP | | 2016 |
| Walsh Industries Ltd | Manufacturing | 2025 |
| Walters Coaching Ltd | Other services | 2020 |
| Wamami Ltd | Health & social care | 2017 |
| Wanborough Beer Run C.I.C. | Arts & recreation | 2025 |
| Wandiq Limited | Information & communication | 2025 |
| Wansdyke Builders Limited | Manufacturing | 2018 |
| Waram Ltd | Hospitality | 2025 |
| Waratah and Rose Limited | Construction | 2021 |
| Ward & Sons Roofing & Building Ltd | Construction | 2025 |
| Wardrobe Fit Ltd | Manufacturing | 2025 |
| Warhorse Training Ltd | Arts & recreation | 2025 |
| Warm Iceberg Limited | Information & communication | 2016 |
| Warren Ductwork Ltd | Energy | 2008 |
| Warrior Build Ltd | Construction | 2024 |
| Warsaw Supermarket Ltd | Wholesale & retail | 2018 |
| Wasafeen Ltd | Wholesale & retail | 2024 |
| Wasdell Holdings Limited | Professional & scientific | 2006 |
| Wasdell Manufacturing Limited | Manufacturing | 2014 |
| Wasdell Northampton Ltd | Administrative & support | 1997 |
| Wasdell Packaging Limited | Manufacturing | 1969 |
| Wasdell Properties Ltd | Real estate | 2016 |
| Wash Wash Services Ltd | Administrative & support | 2025 |
| Washbourne House Therapy Centre Ltd | Health & social care | 2019 |
| Wasp Industrial Services Limited | Wholesale & retail | 2010 |
| Wass Homes Limited | Construction | 2019 |
| Waste Removal Recycle Management Ltd | Water & waste | 2023 |
| Waste to Energy Systems Limited | Extraterritorial | 2013 |
| Wastestrike Limited | Water & waste | 2022 |
| Wasy Care Ltd | Health & social care | 2023 |
| Watado Limited | Administrative & support | 2015 |
| Watch Yourself Media Limited | Information & communication | 2024 |
| Watchet Glass and Glazing Limited | Construction | 2012 |
| Watchfield Service Centre Ltd | Wholesale & retail | 2010 |
| Watching Waves Limited | Real estate | 2025 |
| Waterford Environmental Limited | Real estate | 2015 |
| Waterpark Aggregates Limited | Extraterritorial | 2016 |
| Waterpark Storage Limited | Transport & logistics | 2004 |
| Waters Properties Limited | Real estate | 2017 |
| Watersedge Building Consultants Limited | Construction | 2016 |
| Waterskier Software Limited | Information & communication | 1994 |
| Watkins Business Transformation Ltd | Professional & scientific | 2025 |
| Watson Building Contractors Limited | Construction | 2024 |
| Watson Commercial Properties Limited | Real estate | 2017 |
| Watson Oils Ltd | Wholesale & retail | 2014 |
| WAV Solutions Limited | Professional & scientific | 2025 |
| Waxables Ltd | Wholesale & retail | 2025 |
| Waxcourt Limited | Extraterritorial | 2017 |
| Wayne Holder Vehicle Service and Repair Ltd | Wholesale & retail | 2024 |
| Wayson Partners Ltd | Professional & scientific | 2018 |
| Wazeek Limited | Information & communication | 2015 |
| WB Gloucestershire & North Wiltshire Ltd | Education | 2019 |
| WB Maintenance Limited | Construction | 2019 |
| WBP LAN LLP | | 2024 |
| WBP MAN N LLP | | 2020 |
| Wbps Gloucestershire & North Wiltshire LP | | 2017 |
| WBS Auto Ltd | Wholesale & retail | 2008 |
| WD Finance Limited | Financial services | 2024 |
| WDB and SON Roofing Ltd | Construction | 2026 |
| Wdsl 07740954 Limited | Extraterritorial | 2011 |
| WE ARE Design Dough Limited | Information & communication | 2026 |
| WE ARE Happy Dogs Ltd | Other services | 2023 |
| WE ARE Made to Move Ltd | Professional & scientific | 2016 |
| WE ARE Stage One Ltd | Professional & scientific | 2017 |
| WE DO IT Ltd | Administrative & support | 2017 |
| WE Know Beauty Ltd | Professional & scientific | 2018 |
| WE Love Pets East Kilbride Ltd | Other services | 2025 |
| WE Love Pets Wimbledon & Richmond Ltd | Other services | 2026 |
| WE Make Footballers (Croydon) LLP | | 2019 |
| WE Make Footballers (Ealing) LLP | | 2018 |
| WE Make Footballers (Essex) LLP | | 2018 |
| WE Make Footballers (Milton Keynes) LLP | | 2018 |
| WE Make Footballers (Sunbury) LLP | | 2017 |
| WE Make Footballers (Sussex) LLP | | 2018 |
| WE Make Footballers (TW Area) LLP | | 2015 |
| WE Make Footballers - Chislehurst and Orpington LLP | | 2022 |
| WE Make Footballers Beckenham LLP | | 2018 |
| WE Make Footballers Chiswick, Sheen, Southall LLP | | 2015 |
| WE Make Footballers Cobham LLP | | 2024 |
| WE Make Footballers Epsom LLP | | 2021 |
| WE Make Footballers Farnborough LLP | | 2019 |
| WE Make Footballers Gillingham LLP | | 2019 |
| WE Make Footballers Girls (BR2 and BR3) LLP | | 2025 |
| WE Make Footballers Greenwich LLP | | 2019 |
| WE Make Footballers Lewisham LLP | | 2021 |
| WE Make Footballers Limited | Arts & recreation | 2011 |
| WE Make Footballers Redhill and Reigate LLP | | 2019 |
| WE Make Footballers Richmond LLP | | 2018 |
| WE Make Footballers Sutton LLP | | 2022 |
| WE Move and Clean Ltd | Transport & logistics | 2026 |