| West Langton Fields Limited | Real estate | 2024 |
| West Street Housing Ltd | Construction | 2022 |
| West View Farm Lodges Ltd | Hospitality | 2016 |
| Westerby Textiles Ltd | Wholesale & retail | 2014 |
| Westhorpe Investments Limited | Real estate | 1983 |
| Weston & Wall Property Acquisitions Limited | Real estate | 2025 |
| Weston OIL Heating Services Ltd | Construction | 2019 |
| What George Made Ltd | Information & communication | 2018 |
| What Recipe Ltd | Wholesale & retail | 2022 |
| Wheat Plumbing and Heating Limited | Construction | 2016 |
| Wheel and Compass Ltd | Hospitality | 2002 |
| Wheeler Associates (Management Consultants) Limited | Professional & scientific | 2005 |
| Whelan Strategic Holdings Ltd | Financial services | 2026 |
| Whetstone Golf Club Limited | Arts & recreation | 1995 |
| Whirring Tech Limited | Information & communication | 2025 |
| WHT Kaynak Ltd | Real estate | 2023 |
| Wicked Smaht Ltd | Information & communication | 2020 |
| Wild & Furrow Limited | Manufacturing | 2020 |
| Wild Sauna Club Limited | Health & social care | 2024 |
| Wildmore Limited | Real estate | 1997 |
| Wilkinson Goldsmiths Ltd | Manufacturing | 2022 |
| Willen,Limited | Wholesale & retail | 1946 |
| William Durden & Associates Limited | Construction | 2024 |
| William Durden Limited | Construction | 2024 |
| William Naylor Limited | Real estate | 2005 |
| William Parker Holdings Limited | Professional & scientific | 2021 |
| Willoughby (607) Limited | Financial services | 2013 |
| Willoughby (608) Limited | Financial services | 2013 |
| Willoughby (609) Limited | Construction | 2013 |
| Willoughby (610) Limited | Hospitality | 2017 |
| Willow Electrical Limited | Construction | 2009 |
| Wilson GAS Solutions Ltd | Construction | 2020 |
| Wilsondee Ltd | Professional & scientific | 2017 |
| Wilten Construction Ltd | Construction | 2021 |
| Wilten Group Ltd | Construction | 2020 |
| Wilten Holdings Ltd | Financial services | 2021 |
| Winchween Ltd | Transport & logistics | 2021 |
| Window Restore Limited | Construction | 2019 |
| Windsor Court Company Limited | Households | 1998 |
| Winfield Collective Ltd | Administrative & support | 2022 |
| Wingates Gallery Limited | Wholesale & retail | 2017 |
| Wireless Alert Solutions Limited | Manufacturing | 2004 |
| Withcote Properties Limited | Construction | 2019 |
| Wizbiz Limited | Wholesale & retail | 2003 |
| WJ Andrews Property Limited | Real estate | 2017 |
| WMB Consulting Ltd | Professional & scientific | 2014 |
| Wolford Green Limited | Financial services | 2021 |
| Women in Logistics UK CIC | Other services | 2024 |
| Women Only Walks (WOW) CIC | Arts & recreation | 2025 |
| Woodger Limited | Professional & scientific | 2015 |
| Woodland Collective Ltd | Real estate | 2023 |
| Woodlands Group Midlands Ltd. | Construction | 2019 |
| Woodman Asset Management (UK) Ltd | Financial services | 2015 |
| Woodman Fixed Income (UK) Ltd | Financial services | 2017 |
| Woodman Real Estate (UK) Ltd | Financial services | 2017 |
| Woodpecker Tree Surgery Ltd | Administrative & support | 2014 |
| Woowoo (East) Limited | Financial services | 2025 |
| Word Queen Ltd | Professional & scientific | 2017 |
| Workerlink Limited | Information & communication | 2015 |
| Workshopt Ltd | Extraterritorial | 2026 |
| Worldwide Church of GOD | Professional & scientific | 2022 |
| WOW Renovations Limited | Real estate | 2024 |
| WOW Works Limited | Professional & scientific | 2016 |
| WOY WOY Limited | Financial services | 2022 |
| Wrap Ventures Limited | Financial services | 2023 |
| Wright Advertising Ltd | Professional & scientific | 2020 |
| Wright Studios Ltd | Professional & scientific | 2022 |
| WRT Services Ltd | Professional & scientific | 2025 |
| WTB Estates Limited | Real estate | 2026 |
| Xcel Homes Ltd | Health & social care | 2020 |
| XL Asset Management Limited | Agriculture & fishing | 2008 |
| Xperience Counts Limited | Administrative & support | 2008 |
| Xtreme Software Solutions Limited | Manufacturing | 2001 |
| Xtreme Van Limited | Wholesale & retail | 2012 |
| Xxii Group Ltd | Financial services | 2021 |
| Xxii Real Estate Ltd | Real estate | 2021 |
| Yaffie House Ltd | Information & communication | 2025 |
| Yarab Holdings Ltd | Information & communication | 2010 |
| Yarab Limited | Information & communication | 2009 |
| Yasso Ltd | Financial services | 2016 |
| Yellow Brick Advisory Limited | Professional & scientific | 2024 |
| Yellow Hound Design Ltd | Professional & scientific | 2026 |
| Ylin Limited | Health & social care | 2015 |
| YMD Boon Limited | Professional & scientific | 2006 |
| Yoga Meditation Inst Ltd | Other services | 2013 |
| Yogi in Law Ltd | Professional & scientific | 2023 |
| Yorbag Limited | Other services | 2016 |
| Your Element Ltd | Extraterritorial | 2023 |
| Your Rent Payment Limited | Financial services | 2017 |
| Your Yoga Ltd | Arts & recreation | 2023 |
| Yourlocale Ltd | Professional & scientific | 2014 |
| Zala Associates Ltd | Health & social care | 2025 |
| ZD Insight Consulting Ltd | Professional & scientific | 2026 |
| ZEE Consultancy Ltd | Professional & scientific | 2023 |
| Ziggy GEE Contractors Limited | Administrative & support | 2022 |
| ZIP Learning Ltd | Extraterritorial | 2017 |
| ZOE Davies Consulting Ltd | Professional & scientific | 2023 |
| Zofyshades Ltd | Administrative & support | 2021 |
| Zoop Recruitment Ltd | Administrative & support | 2019 |