| Wired Orthodontics Limited | Extraterritorial | 2009 |
| Wirelessnet Ltd | Professional & scientific | 2013 |
| Wiseman Solutions Limited | Administrative & support | 2011 |
| Wiseone Limited | Administrative & support | 2003 |
| Wiseup Networks Limited | Information & communication | 2019 |
| Witchingham Management Limited | Households | 1998 |
| With Savvy Media & Marketing Limited | Administrative & support | 2017 |
| Withinme Limited | Information & communication | 2019 |
| Withsecure Limited | Information & communication | 2002 |
| Witsmate Limited | Information & communication | 2021 |
| WJ Brothers Property Ltd | Real estate | 2022 |
| WK Extension Project Limited | Energy | 2013 |
| Wla(Uk) Ltd | Administrative & support | 2008 |
| WM One Nominee Limited | Financial services | 2023 |
| WM Two Nominee Limited | Financial services | 2023 |
| Wmorrison Contracting Limited | Professional & scientific | 2019 |
| Woburn Capital Limited | Professional & scientific | 2023 |
| Wodehouse I.T. Limited | Information & communication | 1998 |
| Woden Court Management Ltd | Households | 2015 |
| Wodwox Limited | Education | 2022 |
| WOK Inn Altrincham Limited | Hospitality | 2019 |
| Wolf Consult Limited | Professional & scientific | 2023 |
| Wolf Trading (Manchester) Limited | Administrative & support | 2018 |
| Women in the Law UK Ltd | Other services | 2019 |
| Wonder Grip UK Ltd | Wholesale & retail | 2019 |
| Wonder Salon Ltd | Other services | 2019 |
| Wondersearch Ltd | Wholesale & retail | 2017 |
| WOO HOO Limited | Information & communication | 2007 |
| Wood Oven Warehouse Limited | Wholesale & retail | 2018 |
| Woodblossoms Animal Services Ltd | Other services | 2025 |
| Woodblossoms Ltd | Other services | 2020 |
| Woodcote (Hale) Limited | Households | 1994 |
| Wooden Belles Limited | Professional & scientific | 2007 |
| Woodfell Warrington Limited | Real estate | 2004 |
| Woodhall Farm Fraser Homes Limited | Construction | 2024 |
| Woodheys Investments Ltd | Real estate | 2019 |
| Woodlands (Bollington Lane) Management Limited | Real estate | 2018 |
| Woodlands Bank (Management) Company Limited | Professional & scientific | 2004 |
| Woodlands Nursery Limited | Education | 2005 |
| Woodmeadow Ltd | Administrative & support | 2020 |
| Worcester Road Management Limited | Households | 2012 |
| Work at Ours Limited | Real estate | 2023 |
| Work Nexus Labs Limited | Information & communication | 2026 |
| Work Space Solutions Limited | Real estate | 2023 |
| Workguide Limited | Professional & scientific | 2024 |
| Workihr Ltd | Administrative & support | 2019 |
| Workshop Holdings Ltd | Financial services | 2024 |
| Workshop Marketing Agency Ltd | Professional & scientific | 2011 |
| Workshop Operations Ltd | Professional & scientific | 2023 |
| Worksmarthub Ltd | Real estate | 2018 |
| Worksync Ltd | Administrative & support | 2018 |
| World Bikes Limited | Wholesale & retail | 2005 |
| World Combat Fighting Championship Ltd | Arts & recreation | 2018 |
| World Football Classics Limited | Education | 2025 |
| World Spirit Limited | Administrative & support | 2000 |
| World Tax Services UK Limited | Professional & scientific | 2025 |
| World Wildlife Watch | Health & social care | 2018 |
| Worldplanner Business Solutions LLP | | 2020 |
| Worldwide Golf Europe, Ltd. | Financial services | 2025 |
| Worldwide Recruitment Solutions (Africa) Limited | Administrative & support | 2024 |
| Worldwide Recruitment Solutions Holdings Limited | Financial services | 2024 |
| Worldwide Recruitment Solutions Limited | Administrative & support | 2001 |
| Worrall Property Group Ltd | Real estate | 2026 |
| Worsley Point Residents Company Limited | Households | 2006 |
| Worsley Subsea Engineering Ltd | Construction | 2024 |
| WOW Lotto Limited | Professional & scientific | 2015 |
| Wozny Limited | Professional & scientific | 2020 |
| WPD Barber Limited | Other services | 2024 |
| WPH Consultancy Ltd | Professional & scientific | 2024 |
| WR Property Holdings Ltd | Real estate | 2017 |
| Wraparound Partnership Limited | Education | 2014 |
| WRC Consulting Limited | Professional & scientific | 2024 |
| Wrencote Pmbc Ltd | Professional & scientific | 2022 |
| Wric Ltd | Financial services | 2023 |
| Wright Design Services Limited | Administrative & support | 2018 |
| Wright HR & Administration Services Limited | Administrative & support | 2025 |
| Wright Kayah Estate Agency Limited | Real estate | 2022 |
| Wrth YR Afon Management Ltd | Administrative & support | 2012 |
| Wychmond Enterprises Limited | Professional & scientific | 2017 |
| Wykeham Farrance Limited | Extraterritorial | 2004 |
| Wyncourt (EOT) Limited | Financial services | 2026 |
| Wyncourt Nursing Home Ltd | Health & social care | 2023 |
| Wyndham Consulting Limited | Information & communication | 2024 |
| Wyse ADR Limited | Professional & scientific | 2023 |
| Wythenshawe Park Riding Stables Ltd | Arts & recreation | 2017 |
| Wyze Consulting Limited | Professional & scientific | 2024 |
| Xaira UK Limited | Professional & scientific | 2024 |
| Xalient Holdings Limited | Information & communication | 2015 |
| Xalient Limited | Information & communication | 2009 |
| Xalientglobal Limited | Information & communication | 2015 |
| Xamara Limited | Real estate | 2018 |
| Xantaris Investments (March) Limited | Real estate | 2006 |
| Xantaris Investments (XXI) Limited | Real estate | 2005 |
| Xceltec Limited | Construction | 2023 |
| Xedap Limited | Administrative & support | 2023 |
| Xenox Ltd | Real estate | 2025 |
| Xiangtian Shengda Technology and Trade UK Ltd | Professional & scientific | 2021 |
| Xinbo Financial Solutions Ltd | Professional & scientific | 2021 |
| XKB Solutions Ltd | Information & communication | 2019 |
| Xology Limited | Wholesale & retail | 2020 |