| WELLCARED4ALL Limited | Health & social care | 2016 |
| Wellness & Unwind Ltd | Other services | 2026 |
| Welltex (UK) Limited | Wholesale & retail | 2018 |
| Wemoveyourmotorcar Ltd | Transport & logistics | 2022 |
| Wenoc Beauty Limited | Other services | 2025 |
| Wensley Management Limited | Professional & scientific | 2014 |
| WEP Construction Ltd | Extraterritorial | 2026 |
| Wernham Webb Limited | Other services | 2019 |
| Wescott Group Limited | Financial services | 2020 |
| Wescott Industrial Services Ltd | Manufacturing | 2010 |
| West Highlands Limited | Hospitality | 2021 |
| West Maldon Trading Ltd | Construction | 2026 |
| West Services & Solutions Ltd | Wholesale & retail | 2023 |
| Westbourne 7 Limited | Financial services | 2020 |
| Westbourne 8 Limited | Financial services | 2020 |
| Westburns Ltd | Wholesale & retail | 2006 |
| Westburns Property Holdings Ltd | Real estate | 2016 |
| Westcliff Medical Practice Ltd | Health & social care | 2026 |
| Western Developments Europe (55) Limited | Professional & scientific | 2006 |
| Westpoint Asset Limited | Real estate | 2018 |
| Westpoint Property Limited | Real estate | 2000 |
| Westpoint Risk Solutions Ltd | Professional & scientific | 2011 |
| Westvase Media Limited | Professional & scientific | 2022 |
| Wethersfield Homes Ltd | Real estate | 2020 |
| Wetradephones Ltd | Wholesale & retail | 2020 |
| WFA Coaching & Training Provider Ltd | Education | 2019 |
| WH Engineering Group Limited | Financial services | 2024 |
| Whamsoft Limited | Other services | 2010 |
| Wharf Freehold Limited | Real estate | 2025 |
| What Spencer Does Ltd | Information & communication | 2012 |
| WHD Contracts Limited | Construction | 2021 |
| Wheels and Shine Limited | Administrative & support | 2023 |
| Whiskey Wicks Ltd | Hospitality | 2025 |
| White & Black Properties Ltd | Real estate | 2022 |
| White Design Collective Limited | Professional & scientific | 2025 |
| White Dog Fitness Ltd | Arts & recreation | 2019 |
| White Flamingo Ltd | Information & communication | 2016 |
| White Hot Properties Limited | Professional & scientific | 2002 |
| White Phoenix Limited | Professional & scientific | 2013 |
| White Phoenix Media Ltd. | Information & communication | 2000 |
| White Storks Windows and Joinery Limited | Wholesale & retail | 2020 |
| Whiteboard Tech Ltd | Information & communication | 2022 |
| Whitehall Car Care Ltd | Administrative & support | 2025 |
| Whitehouse Leisure International Holdings Limited | Professional & scientific | 2015 |
| Whitehouse Leisure International Limited | Professional & scientific | 1998 |
| Whitehouse Leisure Ventures Ltd | Extraterritorial | 2001 |
| Whitewaters Group Limited | Other services | 2015 |
| Whitewaters Training Limited | Information & communication | 2011 |
| Whitmore Enterprise Limited | Wholesale & retail | 2018 |
| Whitmore PUB Co Limited | Hospitality | 2018 |
| WHL International Limited | Wholesale & retail | 2004 |
| WHY Wait Mentoring Ltd | Financial services | 2024 |
| Wicked Interiors Ltd | Construction | 2025 |
| Wickford London Road Ltd | Construction | 2024 |
| Wickford Plumbing Supplies Limited | Wholesale & retail | 2020 |
| Widdle Gifts Limited | Wholesale & retail | 2015 |
| Wide Format Warehouse Limited | Professional & scientific | 2012 |
| Wiist Limited | Construction | 2017 |
| Wil-Go Logistics Ltd | Transport & logistics | 2023 |
| Wild Conducts Ltd | Wholesale & retail | 2015 |
| Wild Festivals Group Ltd | Arts & recreation | 2019 |
| Wild Roots Croft CIC | Education | 2026 |
| Willett Holdings Ltd | Real estate | 2016 |
| Willetton International Ltd | Wholesale & retail | 2025 |
| William Russell Architects Limited | Professional & scientific | 2017 |
| Williams Construction (Essex) Ltd | Construction | 2018 |
| Willoughby ENG Ltd | Professional & scientific | 2016 |
| Willoughbys Procurement Limited | Other services | 2007 |
| Willow Accessories ( London ) Ltd | Wholesale & retail | 2021 |
| Willow Norton Ltd | Manufacturing | 2026 |
| Wilshers (Management Services) Limited | Administrative & support | 1992 |
| Wilshers Probate Services Limited | Administrative & support | 1993 |
| Wilsher’S Pets Ltd | Wholesale & retail | 2022 |
| Wilson Bespoke Construction Limited | Construction | 2022 |
| Wilson Building Contractors Limited | Construction | 2013 |
| Wilson Construction (SE) Limited | Professional & scientific | 2024 |
| Wilson Controls Solutions Limited | Construction | 2014 |
| Wilsonwood Crownhill Ltd | Households | 2022 |
| Wilsonwood Properties Ltd | Real estate | 2010 |
| Winbelz Services Ltd | Health & social care | 2022 |
| Winchx Ltd | Information & communication | 2025 |
| Windoor Direct Ltd | Wholesale & retail | 2019 |
| Windoor Maintenance Ltd | Manufacturing | 2014 |
| Windspring Associates UK Ltd | Transport & logistics | 2009 |
| Windy Sport Group Ltd | Information & communication | 2020 |
| Wing Soon Food Ltd | Hospitality | 2017 |
| Wingfield Cleaning Company Limited | Administrative & support | 2025 |
| Winns SEN Specialist Care Limited | Health & social care | 2026 |
| Wire Arts Limited | Manufacturing | 2025 |
| Wire Wise Electrical Limited | Construction | 2023 |
| Wirs Consulting Limited | Other services | 2025 |
| Wiseman Flooring Limited | Construction | 2017 |
| With Love Events Ltd | Hospitality | 2024 |
| Wkhst Limited | Real estate | 2023 |
| WLW Future Limited | Information & communication | 2012 |
| WM Air Conditioning Ltd | Energy | 2026 |
| WOB Contractors Limited | Construction | 2017 |
| WOE Ltd | Wholesale & retail | 2020 |
| WOK & Roll Ltd | Hospitality | 2003 |
| Wolf Building Solutions Limited | Construction | 2019 |