| Whitlane Limited | Extraterritorial | 1999 |
| Whobenwho Ltd | Education | 2024 |
| Whole Earth Communities CIC | Education | 2026 |
| Wholeness Group Ltd | Wholesale & retail | 2026 |
| Whph INK Ltd | Administrative & support | 2016 |
| WHY NOT NOW? Travel Ltd | Professional & scientific | 2022 |
| Wibdi Ltd | Wholesale & retail | 2018 |
| Wigit Ltd | Wholesale & retail | 2017 |
| WIL Haulage Ltd | Construction | 2018 |
| Wilhays Trade Limited | Construction | 2024 |
| Wilkes Property Management Company Limited | Households | 2025 |
| Wilkie Events Limited | Construction | 2025 |
| Wilkincroft Limited | Real estate | 1985 |
| Willandraffe Ltd | Wholesale & retail | 2025 |
| William Moss Group Limited(The) | Extraterritorial | 1919 |
| Williams Roofing & Contractors Limited | Construction | 2025 |
| Willow Properties Limited | Real estate | 2023 |
| Willowpark Estates Co. Ltd | Extraterritorial | 1999 |
| Willowport Enterprises Limited | Real estate | 2012 |
| Willowtree Property Limited | Real estate | 2011 |
| Wilmslow Road Holdings Ltd | Construction | 2021 |
| Wilson & ROE HCE Limited | Professional & scientific | 2010 |
| Wilson Studios Limited | Extraterritorial | 2023 |
| Winbrand Ltd | Wholesale & retail | 2022 |
| Winckley One Cowork Ltd | Professional & scientific | 2023 |
| Windermere Gardens Management Company Limited | Real estate | 2024 |
| Windermere Law Limited | Professional & scientific | 2025 |
| Windlesham Holdings Ltd | Real estate | 2023 |
| Windmill Childcare Limited | Education | 2005 |
| Wineyard Developments Ltd | Real estate | 2022 |
| WINFIELD2000 Ltd | Professional & scientific | 2024 |
| Winged Travel Ltd | Administrative & support | 2026 |
| Wingford Management Company Limited | Real estate | 1979 |
| Winningways MCR Limited | Hospitality | 2025 |
| Winsford Devco LLP | | 2016 |
| Winsford Holdings 1 LLP | | 2016 |
| Winsford Holdings 2 LLP | | 2016 |
| Winsor Snacks Limited | Wholesale & retail | 2021 |
| Winter Studio Films Ltd | Information & communication | 2025 |
| Winterbourne Medical Ltd | Information & communication | 2022 |
| Winthorpe Law Limited | Professional & scientific | 2024 |
| Wire IT Solutions Limited | Construction | 2022 |
| Wirksworth Property Holdings Limited | Other services | 2024 |
| Wirral Growth Company Nominee Limited | Administrative & support | 2017 |
| Wisdom & Effort Retail Ltd | Wholesale & retail | 2017 |
| Wisdom and Effort Ltd | Manufacturing | 2016 |
| Wise Cook Ltd | Hospitality | 2025 |
| Wise G2 Ltd | Construction | 2025 |
| Wisedebt Solution Ltd | Professional & scientific | 2025 |
| Wisehse Limited | Real estate | 2018 |
| Wiser Estates Ltd | Real estate | 2024 |
| Wiseway Education Ltd | Other services | 2020 |
| Wiseworx Ltd | Construction | 2021 |
| Wish Money Ltd | Financial services | 2023 |
| Wish Self-Storage Ltd | Real estate | 2021 |
| Wisla Market Ltd | Wholesale & retail | 2019 |
| Wispmart Ltd | Wholesale & retail | 2025 |
| Wiswould Wise Productions Ltd | Arts & recreation | 2024 |
| With Two Eyes Ltd | Information & communication | 2024 |
| WK Estates Ltd | Real estate | 2025 |
| WL Management Limited | Households | 2010 |
| WM Joinery & Fire Door Specialist Ltd | Construction | 2023 |
| WMB (Mechanical) Limited | Construction | 2011 |
| Woh-Nort Ltd | Health & social care | 2026 |
| WOK 'N' ROE Limited | Hospitality | 2006 |
| Wolesley Finance Limited | Administrative & support | 2025 |
| Wolf Educational Services Ltd | Education | 2024 |
| Wolf Guard Security Services Ltd | Administrative & support | 2025 |
| Wolf's Head Limited | Information & communication | 2022 |
| Wolfgang Advisory Ltd | Professional & scientific | 2025 |
| Wollatonnottingham II Limited | Real estate | 2022 |
| Wollatonnottingham Limited | Real estate | 2020 |
| Women Stocking Ltd | Wholesale & retail | 2025 |
| Women WHO Rise UP CIC | Administrative & support | 2023 |
| Wong's Bros UK Co. Ltd | Real estate | 2024 |
| Woodall Contracting Ltd | Construction | 2008 |
| Woodbine Estates Ltd | Real estate | 2022 |
| Woodbury Investments Ltd | Real estate | 2014 |
| Woodbury Park RTM Company Limited | Households | 2010 |
| Woodchester House (NO 1) Ltd | Extraterritorial | 2000 |
| Wooden Spoon F&J Catering Ltd | Hospitality | 2024 |
| Woodend Properties Ltd | Real estate | 2019 |
| Woodhouse Wigan Ltd | Real estate | 2021 |
| Woodlake Estates Ltd | Real estate | 2021 |
| Woodlake Holdings Ltd | Real estate | 2026 |
| Woodlake Investments Ltd | Real estate | 2015 |
| Woodlake Limited | Professional & scientific | 2011 |
| Woodlake Management Limited | Real estate | 2019 |
| Woodlake Property Limited | Real estate | 2024 |
| Woodlake View Ltd | Real estate | 2021 |
| Woodlands Day Nursery and Preschool Ltd | Education | 2017 |
| Woodlands Road Holdings Limited | Other services | 2025 |
| Woodlands Timber Packaging Ltd | Administrative & support | 2017 |
| Woodlane Estates Ltd | Extraterritorial | 2005 |
| Woodnock Properties Limited | Construction | 1963 |
| Woodnook Phase 2 Limited | Real estate | 2014 |
| Woodrow Capital Limited | Information & communication | 2020 |
| Woodrow Mercer Healthcare Limited | Professional & scientific | 2020 |
| Woodstraw Holdings Limited | Professional & scientific | 2020 |
| Woolfson Estates Ltd | Real estate | 2025 |