| WINDOW2THEWORLD Ltd | Information & communication | 2022 |
| Windsor Hill Mortgages Limited | Financial services | 2020 |
| Windsor Joinery (Bath) Limited | Construction | 2003 |
| Wines of Bohemia Limited | Wholesale & retail | 2020 |
| Wingtip Watches Limited | Manufacturing | 2026 |
| Winsley Bath Houses Ltd | Real estate | 2018 |
| Winsper Property Specialists Ltd | Extraterritorial | 2013 |
| Winst Ltd | Real estate | 2018 |
| Winstanley Hall Development Company Ltd | Real estate | 1996 |
| Winter Hill Wellness Ltd | Health & social care | 2020 |
| Winwink Ltd | Arts & recreation | 2020 |
| Wireless Instinct Limited | Information & communication | 2003 |
| Wisbang Research Development Ltd | Professional & scientific | 2021 |
| Wisden Homes Ltd | Real estate | 2018 |
| Wiser Finance Ltd | Administrative & support | 2019 |
| Wiser Leaders Ltd | Professional & scientific | 2024 |
| Wishing Tree Horticulture Limited | Professional & scientific | 2011 |
| Wisker Consulting Limited | Professional & scientific | 1995 |
| Wispers Management Limited | Households | 2020 |
| Withoutfire Limited | Information & communication | 2015 |
| Withus Studio Ltd | Professional & scientific | 2017 |
| Withy King Trustees Limited | Administrative & support | 2011 |
| Witter & Sons Renovations Ltd | Construction | 2025 |
| Wivwoom Limited | Information & communication | 2025 |
| Wizard Software Solutions Ltd | Information & communication | 2025 |
| Wjepen Limited | Professional & scientific | 2020 |
| WJF Stone Ltd | Wholesale & retail | 2019 |
| WJL Property Ltd | Construction | 2019 |
| WLD Studio Ltd | Financial services | 2020 |
| Wmcg Holdings Ltd | Financial services | 2020 |
| WOB Group Limited | Wholesale & retail | 2024 |
| WOB Timepieces Limited | Wholesale & retail | 2024 |
| Woldwins Limited | Administrative & support | 2026 |
| Wolf Wine Limited | Wholesale & retail | 2018 |
| Wolfe Management Limited | Professional & scientific | 2015 |
| Wolff Construction Limited | Real estate | 1966 |
| Wolford Entertainment Limited | Professional & scientific | 2010 |
| Wonder & INK Ltd | Education | 2021 |
| Wonderbox Workshop Limited | Wholesale & retail | 2020 |
| Wonderfield Collective Ltd | Information & communication | 2023 |
| Wonersh Consulting Limited | Professional & scientific | 2023 |
| Wood + Stone Limited | Construction | 2020 |
| Wood and Brock (Management) Limited | Households | 1987 |
| Wood Design & Development Limited | Real estate | 2017 |
| Wood Street Bath Management Company Limited | Households | 2017 |
| Wood Towers Ltd | Real estate | 2024 |
| Woodall Plumbing & Heating Contractors Limited | Construction | 2009 |
| Woodfield Ventures Ltd | Real estate | 2023 |
| Woodhill Asset Management LLP | | 2013 |
| Woodhouse & Law Ltd | Professional & scientific | 2009 |
| Woodlands Lake 1 Management Company Limited | Real estate | 2023 |
| Woodpecker Stays Ltd | Real estate | 2023 |
| Woodrights Limited | Agriculture & fishing | 2021 |
| Woods Rose Property Ltd | Real estate | 2025 |
| Woodstone UK Limited | Wholesale & retail | 1995 |
| Woofador Ltd | Information & communication | 2021 |
| Wookey Jones LLP | | 2018 |
| Woolbath Ltd | Wholesale & retail | 2012 |
| Woosh Properties Ltd | Real estate | 2022 |
| Worcester Court (Holdings) Limited | Households | 1966 |
| Worcester Management Company Limited | Households | 2024 |
| Work Less Ordinary Ltd | Information & communication | 2017 |
| Work Work Work Ltd | Professional & scientific | 2021 |
| Workflow Doctor Ltd | Information & communication | 2018 |
| Workhealth Limited | Health & social care | 2004 |
| Working Psychology Limited | Professional & scientific | 2002 |
| Workout Spaces Limited | Other services | 2022 |
| World Billiards Association Ltd | Arts & recreation | 1997 |
| World Billiards Limited | Administrative & support | 2011 |
| World Disability Billiards and Snooker Ltd | Arts & recreation | 2015 |
| World Netball Players Collective Ltd | Arts & recreation | 2025 |
| World of Football Limited | Extraterritorial | 1998 |
| World Pencil Ltd | Education | 2015 |
| World Pencil Trust | Education | 2016 |
| World Professional Billiards and Snooker Association Limited(The) | Arts & recreation | 1982 |
| World Seniors Snooker Limited | Arts & recreation | 2018 |
| World Snooker Association Ltd | Arts & recreation | 1997 |
| World Women's Snooker Ltd | Arts & recreation | 2015 |
| Worldleaf Press Ltd | Information & communication | 2026 |
| Woven Digital Ltd. | Professional & scientific | 2022 |
| Wowify Limited | Wholesale & retail | 2024 |
| Wownow Limited | Hospitality | 2022 |
| WPE Productions Limited | Information & communication | 2020 |
| WPF Consultancy Ltd | Real estate | 2001 |
| Wraxall Builders Limited | Construction | 1981 |
| Wren Baby & Child Ltd | Wholesale & retail | 2021 |
| Wright Street Development Limited | Real estate | 2017 |
| WSA Horse Bedding Limited | Agriculture & fishing | 2017 |
| WST Technology UK Ltd | Information & communication | 2024 |
| WTM Developments Ltd | Real estate | 2007 |
| WWJ ALE & Food Company Limited | Hospitality | 2022 |
| Wyatt & SON Limited | Real estate | 2020 |
| Wyeside Consulting Ltd | Administrative & support | 2016 |
| Wyldehearth Events Limited | Hospitality | 2015 |
| Wyldehearth Specials Ltd | Hospitality | 2019 |
| Wyrd Limited | Wholesale & retail | 2017 |
| X-Cellent Nails and Beauty Ltd | Other services | 2024 |
| Xcalimed (Turkey) Limited | Professional & scientific | 2025 |
| Xcetra Media Limited | Professional & scientific | 2008 |
| Xelium Ltd | Information & communication | 2009 |