| Wawin M5 Ltd | Hospitality | 2023 |
| Waydale Limited | Other services | 1990 |
| Wayne Connolly Holdings Limited | Other services | 2008 |
| WB Noodle Ltd | Hospitality | 2025 |
| WBR Estates Ltd | Real estate | 2024 |
| WC Investments Limited | Real estate | 2014 |
| Wckd Technologies Limited | Information & communication | 2023 |
| WCM Consultancy Limited | Professional & scientific | 2024 |
| WE ARE Survivors | Health & social care | 2009 |
| WE Love Vapes Ltd | Wholesale & retail | 2025 |
| WE Make Footballers Manchester Collyhurst LLP | | 2024 |
| WE Move Estates Limited | Real estate | 2017 |
| WE Shine IT Cleaning Company Ltd | Administrative & support | 2022 |
| WE Stax Limited | Wholesale & retail | 2021 |
| WE Three - Citizen Support Services Ltd | Professional & scientific | 2025 |
| Weade Ltd | Information & communication | 2012 |
| Wealth Restoration Solutions Ltd | Financial services | 2023 |
| Weaste Hotels Ltd | Hospitality | 2022 |
| Weauname Health Care Limited | Health & social care | 2022 |
| Weaverwood Ltd | Real estate | 2004 |
| Web Thirst Limited | Information & communication | 2006 |
| WEB3ANDME Ltd | Information & communication | 2022 |
| Websharks Ltd | Extraterritorial | 2023 |
| Webuybikes Ltd | Education | 2023 |
| Wedding Film Festival Ltd | Information & communication | 2025 |
| Weimor Ltd | Financial services | 2021 |
| Weintraub Estates Limited | Extraterritorial | 2015 |
| Weird Rainbow Films Ltd | Information & communication | 2021 |
| Weiss Capital Ltd | Real estate | 2025 |
| Weiss Estates Ltd | Real estate | 2026 |
| Wejo Limited | Information & communication | 2013 |
| Welclean Limited | Administrative & support | 2024 |
| Welcome Vape Ltd | Wholesale & retail | 2020 |
| Welden HR Services Limited | Administrative & support | 2018 |
| Welgo Builders Limited | Construction | 2017 |
| Welgo Estates Ltd | Real estate | 2019 |
| Welgo Kitchens Ltd | Real estate | 2018 |
| Well Properties Ltd | Real estate | 2021 |
| Well Space Ergonomics Ltd | Health & social care | 2026 |
| Welli Properties 36 Limited | Real estate | 2026 |
| Wellington Apartments (2) Ltd | Professional & scientific | 2017 |
| Wellington Apartments Ltd | Professional & scientific | 2017 |
| Wellington Assets Management Company Limited | Real estate | 2016 |
| Wellington East Ltd | Real estate | 2020 |
| Wellington Residences Limited | Real estate | 2025 |
| Wellington White Property Management Limited | Construction | 2025 |
| Welliwest Trading Ltd | Wholesale & retail | 2019 |
| Wellsky Estates Ltd | Real estate | 2015 |
| Wellspring Pharmaceutical Services Limited | Extraterritorial | 2008 |
| Wellspring Pharmaceutical Services UK Limited | Extraterritorial | 2008 |
| Wellway Estates Ltd | Real estate | 2011 |
| Welwyn Garden City Management Company Limited | Real estate | 2026 |
| Wendy Juno Ltd | Wholesale & retail | 2024 |
| Wesley Court Limited | Professional & scientific | 1980 |
| Wesley Moore Talent Management Ltd | Arts & recreation | 2025 |
| West Bell Limited | Wholesale & retail | 2024 |
| West Craig Mews Investment Co Limited | Real estate | 2026 |
| West Craig Mews SPV Limited | Real estate | 2026 |
| West George Street Services Limited | Real estate | 2025 |
| West Meadows Property Limited | Extraterritorial | 2010 |
| Westblue Limited | Financial services | 2016 |
| Westend Home Renovations Ltd | Construction | 2026 |
| Westgy Ltd | Real estate | 2026 |
| Westland Systems Limited | Information & communication | 2009 |
| Westpoint Corporate Limited | Extraterritorial | 2015 |
| Westwood Joinery Ltd | Construction | 2024 |
| Weterymaria Limited | Professional & scientific | 2022 |
| Wetri Vale Limited | Real estate | 2025 |
| WEY Securities 2 Limited | Real estate | 2022 |
| WEY Securities Limited | Real estate | 2022 |
| Weyden Limited | Extraterritorial | 2000 |
| WG Birmingham Limited | Extraterritorial | 2019 |
| WG Cardiff Limited | Extraterritorial | 2019 |
| WG Chichester Limited | Extraterritorial | 2019 |
| WG Holdings Ltd | Real estate | 2025 |
| WG Watford Limited | Extraterritorial | 2019 |
| WGP Marketing Limited | Professional & scientific | 2024 |
| WH UK Investments Ltd | Real estate | 2023 |
| Wharton Ventures Ltd | Administrative & support | 2025 |
| Wheatrig Rise Management Company Limited | Households | 2025 |
| WHG Management Co Limited | Households | 2025 |
| Whisky Glen Ltd | Wholesale & retail | 2021 |
| Whisper (North) Limited | Information & communication | 2021 |
| White Brick Estates Ltd | Real estate | 2022 |
| White House Investment Property Ltd | Real estate | 2026 |
| White Paper Games Ltd | Information & communication | 2012 |
| White Paper Roots Ltd | Education | 2017 |
| White Paper Studio Ltd | Other services | 2017 |
| Whiteband Limited | Extraterritorial | 2016 |
| Whitefield Brownfield Limited | Professional & scientific | 2004 |
| Whitegate & Co Accountants Ltd | Professional & scientific | 2015 |
| Whitehall RD Estates Ltd | Other services | 2018 |
| Whiteley Meadows SPV Limited | Real estate | 2025 |
| Whiteline Property Ltd | Real estate | 2023 |
| Whiteluck Estates Ltd | Real estate | 2019 |
| Whiteside and Davies Ltd | Professional & scientific | 2023 |
| Whiteside Joinery and Building Ltd | Construction | 2026 |
| Whitespace Design Ltd | Real estate | 2021 |
| Whitestone Estates Ltd | Real estate | 2026 |
| Whitlane (NO. 2) Ltd | Extraterritorial | 2005 |