| Winsmart Consulting Ltd | Information & communication | 2022 |
| Wise Home Improvements Ltd | Administrative & support | 2020 |
| Wisepak Limited | Wholesale & retail | 2003 |
| Wisteria Resources Limited | Real estate | 2025 |
| Wistow Consulting Ltd | Professional & scientific | 2017 |
| Wittering Welding Services Limited | Manufacturing | 2025 |
| WJB Accountancy Limited | Professional & scientific | 2024 |
| WJB Finance Ltd | Professional & scientific | 2020 |
| Wolfchem Ltd | Wholesale & retail | 2015 |
| Wolfe Manufacturing Ltd. | Wholesale & retail | 2010 |
| Wolfe Motorsport Ltd. | Manufacturing | 2012 |
| Wonderful Creation Wc's Ltd | Transport & logistics | 2026 |
| Wood Family Houses Ltd | Real estate | 2022 |
| Wood Green Enterprises Limited | Energy | 1996 |
| Wood Street Management Co Limited | Real estate | 2001 |
| Wood Street Nominees Limited | Professional & scientific | 1998 |
| Woodfield (Bluntisham) Ltd | Wholesale & retail | 2023 |
| Woodford Energy Limited | Professional & scientific | 2010 |
| Woodford Recycling Services Ltd. | Water & waste | 2010 |
| Woodford Waste Management Services Ltd | Water & waste | 2010 |
| Woodform Design & Heritage Ltd | Construction | 2017 |
| Woodgreen Plant Ltd | Administrative & support | 2025 |
| Woodstock Green Property Ltd | Real estate | 2025 |
| Woodward Farm Festivals Ltd | Hospitality | 2022 |
| Woodwards Farm Events Limited | Hospitality | 2022 |
| Woodwards Farm Markets Ltd | Hospitality | 2022 |
| Woolley Wags Ltd | Other services | 2018 |
| Woozash Ltd | Transport & logistics | 2019 |
| Working Section Ltd. | Professional & scientific | 2014 |
| World Decor Limited | Wholesale & retail | 2021 |
| World Health and Wellness Directory Ltd | Other services | 2023 |
| World Health and Wellness Ltd | Other services | 2023 |
| Worthy Click Limited | Manufacturing | 2021 |
| WP Footcare Ltd | Health & social care | 2024 |
| Wrapp Group Limited | Manufacturing | 2022 |
| WS Business Consulting Ltd | Professional & scientific | 2025 |
| Wu-Barker Properties Limited | Real estate | 2023 |
| Wwwoosh Trading Limited | Wholesale & retail | 2013 |
| Wychwood Abbey Ltd | Transport & logistics | 1992 |
| Wyrdsisters Games CIC | Other services | 2020 |
| Wyton Ethernet Cable Ltd | Construction | 2024 |
| X-Crop Limited | Professional & scientific | 2014 |
| Xana Limited | Extraterritorial | 2022 |
| Xica Ltd | Financial services | 2026 |
| Xico Ltd | Real estate | 2026 |
| Xingwang Catering Ltd | Hospitality | 2026 |
| XOX Consulting Ltd | Other services | 2013 |
| XT4 Limited | Information & communication | 2013 |
| Xtreme Soccer Zorb Football Limited | Arts & recreation | 2013 |
| Y&Y Construction Trade Ltd | Construction | 2019 |
| Yachtmaster Training Limited | Education | 2020 |
| Yarrow Group Limited | Transport & logistics | 2023 |
| Yelden Services Limited | Manufacturing | 2001 |
| Yelling Pineapple Ltd | Professional & scientific | 2024 |
| Yellow Rose Accommodation Ltd | Real estate | 2023 |
| Yellow Rose Developments Ltd | Real estate | 2023 |
| Yellow Rose Estates Ltd | Administrative & support | 2023 |
| Yellow Rose Group Ltd | Wholesale & retail | 2022 |
| Yellow Rose Property Services Ltd | Construction | 2025 |
| Yinot Design Limited | Professional & scientific | 2020 |
| Young World Leisure Group Limited | Health & social care | 1992 |
| Youngs Agricultural Services Ltd | Professional & scientific | 2013 |
| Youngtech Ltd | Information & communication | 2006 |
| Your Best of Friends Limited | Education | 2012 |
| Your Favourite Skin Clinic Ltd | Other services | 2024 |
| Your Home Store Limited | Professional & scientific | 2008 |
| Your Private Phone Number Limited | Extraterritorial | 2012 |
| Ytbcc Limited | Professional & scientific | 2020 |
| YY Property Management Ltd | Real estate | 2025 |
| YY Property Services Ltd | Construction | 2023 |
| Yylg LP | | 2017 |
| Z & C Care Ltd | Health & social care | 2011 |
| Zakory Properties Limited | Real estate | 2017 |
| Zalient Limited | Information & communication | 2009 |
| Zaradny Ltd | Wholesale & retail | 2026 |
| Zasto Ltd | Transport & logistics | 2019 |
| Zaycomart Limited | Wholesale & retail | 2025 |
| Zayka Capital Management Ltd. | Financial services | 2010 |
| Zaza Barbershop Ltd | Other services | 2022 |
| Zebrazoo Limited | Professional & scientific | 1997 |
| Zela Print Ltd | Manufacturing | 2023 |
| ZEN Medcomms Ltd | Professional & scientific | 2026 |
| ZEN Performance Limited | Wholesale & retail | 2015 |
| ZENIC8 (Emea) Limited | Information & communication | 2015 |
| Zenith Recruiters Ltd | Health & social care | 2013 |
| Zenith WJ Limited | Real estate | 2024 |
| Zetetica Ltd | Information & communication | 1998 |
| Zeus Cars Ltd | Wholesale & retail | 2020 |
| ZI Legacy Holdings Ltd | Financial services | 2025 |
| ZIANI88 Ltd | Transport & logistics | 2022 |
| Zindagi Advisory (UK) Limited | Professional & scientific | 2018 |
| Zirexure Property Ltd | Real estate | 2024 |
| Zlatan Transport Ltd | Transport & logistics | 2025 |
| Zova Virtual Assistant Ltd | Administrative & support | 2025 |
| Zoya Interiors Ltd | Professional & scientific | 2026 |
| Zystm UK Limited | Manufacturing | 2018 |