| World Parts Supply Limited | Wholesale & retail | 2013 |
| Worldbake Limited | Wholesale & retail | 2006 |
| Worldwide Tax Limited | Other services | 2013 |
| Worthy Customs & Logistics Ltd | Transport & logistics | 2025 |
| WOW Group Basingstoke Ltd | Education | 2021 |
| WOW Group Toddler Sense Basingstoke Ltd | Education | 2023 |
| Wprigging Limited | Information & communication | 2020 |
| WPS Compliance Consulting Limited | Construction | 2009 |
| Wray Irwin Associates Limited | Professional & scientific | 2023 |
| Wrgt Property Services Limited | Real estate | 2024 |
| Wrightflex Limited | Real estate | 2024 |
| Wrights Autohaus Limited | Wholesale & retail | 2011 |
| Writing. Editing. Words. Ltd | Professional & scientific | 2020 |
| Writworks Limited | Professional & scientific | 2026 |
| WTW Trailer Services Ltd | Manufacturing | 2022 |
| Wychwood Cabinet Makers Limited | Manufacturing | 2004 |
| Wycliffe Mill Business Centre Limited | Real estate | 2019 |
| Wydels Limited | Wholesale & retail | 2006 |
| Wyke Property Holdings Ltd | Real estate | 2022 |
| Wyndham Destination Network Europe Limited | Professional & scientific | 2010 |
| Wyndham Destination Network LLP | | 2010 |
| Wyndham Holdings | Professional & scientific | 2001 |
| Wyndham Worldwide Limited | Professional & scientific | 1998 |
| X Y LEE Sports Ltd | Wholesale & retail | 2025 |
| Xerobac Limited | Manufacturing | 2024 |
| Xlnt Trade Ltd | Wholesale & retail | 2023 |
| Xplore Aerial Survey and Photography Ltd | Professional & scientific | 2017 |
| Xpressnet (UK) Ltd | Information & communication | 1998 |
| Ya-Latifo International Ltd | Administrative & support | 2021 |
| Yardsbar&Kitchen Ltd | Hospitality | 2017 |
| Yasom Limited | Health & social care | 2011 |
| YC2010 Limited | Health & social care | 2019 |
| Yellow Box Developments Limited | Construction | 2016 |
| Yellow Box Waste Managment Ltd | Water & waste | 2024 |
| Yenots Limited | Extraterritorial | 1945 |
| Yeson UK Limited | Wholesale & retail | 2018 |
| Yield Solutions Ltd | Professional & scientific | 2024 |
| Yildiran Delivery Ltd | Transport & logistics | 2021 |
| YK Translation Services Ltd | Professional & scientific | 2024 |
| YLL Limited | Professional & scientific | 2021 |
| YMR Holdings Limited | Financial services | 2014 |
| Yogada Limited | Professional & scientific | 2019 |
| Yojutsu Limited | Information & communication | 2017 |
| Yolkk Ltd | Professional & scientific | 2022 |
| Yolo Ventures Hub Ltd. | Wholesale & retail | 2024 |
| Yookantoo Therapy Limited | Administrative & support | 2024 |
| Yoola INT. Limited | Construction | 2017 |
| York Close Management Limited | Real estate | 2007 |
| York Logistics Ltd | Transport & logistics | 2024 |
| York Road Kettering Limited | Real estate | 2001 |
| York Road Management Committee 2015 Limited | Real estate | 2015 |
| York Road Parking Limited | Extraterritorial | 2025 |
| York Ward & Rowlatt Limited | Wholesale & retail | 1912 |
| Yorkshire Events Ltd | Hospitality | 2018 |
| Yorkshire Metal Recycling Ltd | Water & waste | 2016 |
| Young Living Children’S Services Ltd | Health & social care | 2021 |
| Your Heritage Limited | Information & communication | 2020 |
| Youth = Youth Limited | Education | 2024 |
| Youth Employment UK C.I.C. | Administrative & support | 2012 |
| Youve GOT Space Limited | Professional & scientific | 2025 |
| YPL Properties Ltd | Real estate | 2022 |
| Yvksr & Associates Practice Ltd | Health & social care | 2019 |
| ZA Global Services Ltd | Transport & logistics | 2026 |
| Zabel Holdings Limited | Professional & scientific | 2024 |
| Zabel Limited | Professional & scientific | 2024 |
| Zach Tall Holdings Ltd | Wholesale & retail | 2025 |
| Zack Russell Trading Limited | Construction | 2025 |
| Zagar Consulting Ltd | Information & communication | 2024 |
| Zainab Motors Limited | Wholesale & retail | 2025 |
| ZAK James Carpentry Limited | Construction | 2019 |
| Zaman Kebab Ltd | Hospitality | 2024 |
| Zaman Time Property Ltd | Real estate | 2025 |
| Zanart Framing Ltd | Wholesale & retail | 2019 |
| Zapline Ltd | Information & communication | 2025 |
| Zaze Ltd | Transport & logistics | 2018 |
| ZB Foods Ltd | Hospitality | 2026 |
| ZE Kettering Limited | Hospitality | 2021 |
| ZEA Happy Ending Ltd | Transport & logistics | 2025 |
| Zealjoes Ltd | Information & communication | 2025 |
| Zeeke Tools Ltd | Wholesale & retail | 2021 |
| Zeller Design Limited | Administrative & support | 2003 |
| Zemer Coffee Ltd | Hospitality | 2026 |
| Zenith Catering Ltd | Hospitality | 2007 |
| Zerobac Technologies Limited | Manufacturing | 2025 |
| Zesty Cuisine Limited | Hospitality | 2024 |
| Zeus Juice EBT Limited | Financial services | 2022 |
| Zeus Juice UK Ltd | Manufacturing | 2014 |
| Zeus Removals Limited | Transport & logistics | 2025 |
| ZFS Solution Ltd | Wholesale & retail | 2018 |
| ZG Recruitment Limited | Administrative & support | 2022 |
| ZHAMMO2 Ltd | Hospitality | 2025 |
| Zimsa Foods Limited | Wholesale & retail | 2026 |
| Zinyemba PVT Ltd | Wholesale & retail | 2015 |
| Zion Vintage Crafts Limited | Wholesale & retail | 2017 |
| Zizwa Healthcare Limited | Health & social care | 2025 |
| Zjet Ltd | Financial services | 2021 |
| ZMC Trading Ltd | Wholesale & retail | 2025 |
| Zone Kettering Limited | Other services | 2024 |
| Zoraz Consulting Ltd | Construction | 2011 |
| Zoya&Roya Ltd | Wholesale & retail | 2026 |