| Wallace GAS & Heating Limited | Construction | 2021 |
| Wallen Property Ltd | Construction | 2023 |
| Walsingham Gate Management Limited | Households | 1986 |
| Walski Homes Ltd | Real estate | 2023 |
| Walters Leisure Limited | Hospitality | 2009 |
| Walton Cars Limited | Wholesale & retail | 2024 |
| Walton Finance Limited | Professional & scientific | 2015 |
| Wanderher Limited | Administrative & support | 2024 |
| Wantage Builders Merchants Limited | Wholesale & retail | 2003 |
| Wantopia Holdings Limited | Financial services | 2016 |
| Wantopia Properties Limited | Real estate | 2016 |
| Warm Front Heating Ltd | Construction | 2026 |
| Warren Wood Fine and Rare Wines Limited | Hospitality | 2011 |
| Warrender Creative House Ltd | Professional & scientific | 2025 |
| Warrior GRP Ltd | Construction | 2025 |
| Warwick Flats Management Co.Limited | Administrative & support | 1975 |
| Warwick Joinery Limited | Manufacturing | 2003 |
| Waste Clear Ltd | Water & waste | 2019 |
| Waste-Vac Ltd | Water & waste | 2026 |
| Wastedrive Limited | Extraterritorial | 1978 |
| Watan Kashmir Cargo Ltd | Wholesale & retail | 2024 |
| Water Design Engineers Limited | Water & waste | 2017 |
| Watercroft Joinery LLP | | 2008 |
| Waterproofing Accessories Limited | Professional & scientific | 2018 |
| Waterrower (UK) Ltd. | Manufacturing | 1991 |
| Waterrower Holdings Limited | Financial services | 2007 |
| Waterside Steel Ltd | Manufacturing | 2020 |
| Watford 1521 Limited | Construction | 2023 |
| Wathuge & Tennekoon Limited | Health & social care | 2013 |
| Waugh Inns Ltd | Hospitality | 2019 |
| Wavara Limited | Information & communication | 2026 |
| Waverley Care & Training Solutions Ltd | Health & social care | 2024 |
| WAX Water Limited | Hospitality | 2017 |
| Waycroft Ventures Limited | Real estate | 2015 |
| Wayside Control Engineering Limited | Professional & scientific | 2026 |
| WBA Ltd | Hospitality | 2017 |
| WC Properties Ltd | Real estate | 2021 |
| WCL 32 Limited | Financial services | 2013 |
| Wdpro Limited | Professional & scientific | 2018 |
| WE ARE Handy Limited | Construction | 2024 |
| WE Buy Phones Limited | Information & communication | 2022 |
| WE Buy Your Car Limited | Wholesale & retail | 2017 |
| WE Buy Your Farm Ltd | Real estate | 2024 |
| WE Love Pets (HW & Marlow) Ltd | Other services | 2022 |
| Wealdstone Autoprep Limited | Wholesale & retail | 1976 |
| Wealth & Health Supplements Ltd | Wholesale & retail | 2025 |
| Wealth Anyway Limited | Administrative & support | 2009 |
| Wearify Trading Limited | Wholesale & retail | 2025 |
| Web Furniture & Installations Ltd | Other services | 2024 |
| Webb Davies Ltd | Information & communication | 2021 |
| Webb Studios Limited | Information & communication | 2023 |
| Webbam (PVT) Ltd | Real estate | 2010 |
| Webrockit Ltd | Information & communication | 2023 |
| Wed-Start Ltd | Other services | 2021 |
| Weedgone Garden Maintenance Limited | Administrative & support | 2011 |
| Weekend Contact Limited | Health & social care | 2024 |
| Weglobal Consultancy Limited | Professional & scientific | 2023 |
| Welaco Ltd | Wholesale & retail | 2023 |
| Welco Solutions Limited | Construction | 2024 |
| Welford FIC Ltd | Other services | 2024 |
| Well Fit Protein Shops Ltd | Hospitality | 2018 |
| Welland Medical Limited | Manufacturing | 1987 |
| Wellbeing Insurance Ltd | Financial services | 1985 |
| Wellbrick Estates Limited | Other services | 1968 |
| Wellby Partners Limited | Wholesale & retail | 2015 |
| Wellington Paddocks (Walmer) Management Company Limited | Households | 2023 |
| Wellness for Work Ltd | Public administration | 2025 |
| Wells Property Assets Ltd | Real estate | 2021 |
| Wendover Enterprise Ltd | Wholesale & retail | 2018 |
| Wendover Hotel Limited | Hospitality | 2008 |
| Wendover Worx Ltd | Construction | 2025 |
| Werema Group Ltd | Administrative & support | 2019 |
| Werema Group(Uk) Ltd | Wholesale & retail | 2024 |
| West Bank Songs Limited | Information & communication | 1980 |
| West Drylining Limited | Construction | 1999 |
| West Frazier Limited | Financial services | 1976 |
| West London Brickwork Ltd | Construction | 2025 |
| West One Care Limited | Health & social care | 2026 |
| West Wycombe Autocentre Limited | Wholesale & retail | 2020 |
| West Wycombe Caves Limited | Arts & recreation | 1953 |
| West Wycombe Residents Association Limited | Real estate | 2001 |
| West Wycombe Road Management Company Limited | Hospitality | 2011 |
| West Wycombe Sporting Limited | Extraterritorial | 2011 |
| West-Evans Consulting Ltd | Extraterritorial | 2021 |
| Westbound Ideal Synergy Ltd | Wholesale & retail | 2023 |
| Westbound Marketing Services Ltd | Wholesale & retail | 2013 |
| Westbound Supreme Solar Ltd | Wholesale & retail | 2023 |
| Westech Consulting Ltd | Professional & scientific | 2023 |
| Westeria Ltd | Real estate | 2024 |
| Westgate Redhill Ltd | Real estate | 2023 |
| Westlake Motor Services Ltd | Wholesale & retail | 2000 |
| Westlake(Wembley) Limited | Wholesale & retail | 1963 |
| Westone 512 Ltd | Real estate | 2024 |
| Westrock Estate Ltd. | Real estate | 2003 |
| Westwon Equipment Limited | Wholesale & retail | 2001 |
| Westwon Finance Limited | Administrative & support | 1997 |
| Westwon Leasing Limited | Information & communication | 1976 |
| Westwon Limited | Financial services | 2004 |
| Westwood Carpentry Ltd | Construction | 2024 |
| Westwyc Management Company Limited | Administrative & support | 1986 |