| Willow Green Traders Ltd | Wholesale & retail | 2019 |
| Willow Hands Care Limited | Health & social care | 2025 |
| Willow Propco Solutions Ltd | Real estate | 2020 |
| Willow Safety Services Limited | Professional & scientific | 2015 |
| Willow Techserve Limited | Information & communication | 2026 |
| Willow Trading Solutions Ltd | Wholesale & retail | 2020 |
| Willow Tree Healthcare Services Limited | Health & social care | 2017 |
| Willowdene Marketing Group Ltd | Other services | 2024 |
| Willows Specialist Roofing & Maintenance Limited | Construction | 2025 |
| Willy Bunny Ltd | Wholesale & retail | 2019 |
| Wilmore Developments Ltd | Extraterritorial | 2023 |
| Wilmott Properties Ltd | Real estate | 2016 |
| Wilmslow Eco DRY Cleaning and Laundry Service Ltd | Other services | 2022 |
| Wilnescote Properties Limited | Construction | 2014 |
| Wilsannie Ltd | Health & social care | 2025 |
| Wilton Green Limited | Other services | 2008 |
| Wiltord Limited | Real estate | 2003 |
| WIM Accountants Limited | Professional & scientific | 2014 |
| WIM Consulting Limited | Professional & scientific | 2020 |
| WIM Facilities Management Ltd | Administrative & support | 2023 |
| WIM Investments Ltd | Real estate | 2021 |
| WIM Professionals Limited | Professional & scientific | 2020 |
| Wimbledon BEWLEY001 Limited | Real estate | 2025 |
| Wimborne Property Investment Ltd | Real estate | 2022 |
| Wimko International Ltd | Wholesale & retail | 2009 |
| WIN Energy Ltd | Professional & scientific | 2012 |
| WIN Your Car Ltd | Wholesale & retail | 2025 |
| Winborne Properties Ltd | Real estate | 2020 |
| Winchester House Estate Agents Ltd | Households | 2022 |
| Windcoast Properties Ltd | Real estate | 2016 |
| Windcrest Trading Limited | Professional & scientific | 2007 |
| Windmill Lane Ltd | Real estate | 2010 |
| Wine Mill Limited | Wholesale & retail | 2010 |
| Winebar SW18 Limited | Hospitality | 2023 |
| Winfield Supermarket Limited | Wholesale & retail | 2008 |
| Wingate Professional Services Ltd | Information & communication | 2020 |
| Wingate Support Services Ltd | Information & communication | 2026 |
| Wingletye Estates Ltd | Real estate | 2015 |
| Winglow Clean Crew Limited | Administrative & support | 2025 |
| Wings Global Ltd | Information & communication | 2025 |
| Wingzo Tech Ltd | Information & communication | 2024 |
| Winlife Ltd | Wholesale & retail | 2023 |
| Winmore Lettings Limited | Real estate | 2019 |
| Winmore Properties Limited | Real estate | 2017 |
| Winnexpro Services Limited | Information & communication | 2025 |
| Winning Ways Healthcare Limited | Health & social care | 2014 |
| Winningales Court Freehold Company Limited | Administrative & support | 2012 |
| Winningales Court RTM Company Limited | Other services | 2012 |
| Wins Properties Ltd | Real estate | 2022 |
| Wintech Software Ltd | Information & communication | 2023 |
| Winted Limited | Wholesale & retail | 2026 |
| Winter Seller Hub Ltd | Wholesale & retail | 2025 |
| Winter Waves Ltd | Wholesale & retail | 2021 |
| Winvestly Ltd | Real estate | 2022 |
| Wipe OUT Global Ltd | Professional & scientific | 2021 |
| Wisdom Construction Limited | Construction | 2020 |
| Wisdom Residential Ltd | Professional & scientific | 2017 |
| Wisdom Tax Accountants Ltd | Professional & scientific | 2014 |
| Wisdom Trading Ltd | Wholesale & retail | 2023 |
| Wise Auto Ltd | Wholesale & retail | 2025 |
| Wise Care Ltd | Health & social care | 2017 |
| Wise Finance Systems Ltd | Real estate | 2013 |
| Wise Install Ltd | Administrative & support | 2025 |
| Wise Trips Ltd | Administrative & support | 2023 |
| Wisebray Limited | Wholesale & retail | 2023 |
| Wisekom Ltd | Other services | 2018 |
| Wiseman IT Solutions Limited | Information & communication | 2011 |
| Wisemann Investment Holdings Ltd | Real estate | 2024 |
| Wisemann Investment Hub Ltd | Real estate | 2024 |
| Wisemann Property Hub Ltd | Real estate | 2024 |
| Wisemen Accountancy & Advisory Ltd | Professional & scientific | 2026 |
| Wiser Installations Limited | Administrative & support | 2016 |
| Wiser Sales Limited | Construction | 2016 |
| Wiske Property Company Limited | Construction | 2002 |
| Wismaa Ltd | Manufacturing | 2025 |
| Wispile Ltd | Real estate | 2023 |
| Wisteria London Management Ltd | Real estate | 2024 |
| Witegate Property Management Ltd | Construction | 2019 |
| With Best Wishes (Petts Wood) Ltd. | Wholesale & retail | 2005 |
| Wizard Pest Control Ltd | Administrative & support | 2022 |
| Wizz Kidzz Limited | Health & social care | 2026 |
| WJ Plumbing Limited | Construction | 2023 |
| WJX Investment Limited | Real estate | 2026 |
| WK MED Ltd | Wholesale & retail | 2020 |
| WK Roofing Limited | Construction | 1999 |
| WKY Limited | Professional & scientific | 2025 |
| Wlcleaners Ltd | Administrative & support | 2020 |
| WLD Trade Group Limited | Construction | 2019 |
| WM Commerce Limited | Financial services | 2015 |
| WMA Global Ltd | Information & communication | 2022 |
| WMT Investments Ltd | Real estate | 2025 |
| WN Corporation Ltd | Financial services | 2026 |
| WN Orthopaedics Ltd | Health & social care | 2025 |
| Wnzj Ltd | Wholesale & retail | 2026 |
| Woking Borough Cars Limited | Transport & logistics | 2005 |
| Wole Yoga Ltd | Wholesale & retail | 2024 |
| Wolf Armouries Limited | Other services | 1999 |
| Wolseley Estates Limited | Real estate | 2016 |
| Wonder Pack Ltd | Manufacturing | 2013 |
| Wonderfully YOU Academy CIC | Education | 2026 |