| Wormwoods Motors Limited | Wholesale & retail | 2021 |
| Woss International Ltd | Wholesale & retail | 2025 |
| WOW Bedrooms Limited | Administrative & support | 2013 |
| WOW Flooring Limited | Construction | 2023 |
| Wowsome XR Limited | Information & communication | 2019 |
| Wozzaarentals Ltd | Real estate | 2026 |
| WPD Designs Limited | Information & communication | 2010 |
| WRE Group Ltd | Administrative & support | 2007 |
| Wrexham Self Storage Limited | Administrative & support | 2004 |
| Wright Property Investments (N/W) Limited | Real estate | 2018 |
| Write First Time Ltd | Information & communication | 2026 |
| Wrizer Ltd | Wholesale & retail | 2021 |
| WRO (Events) Limited | Hospitality | 2010 |
| Wroe Homes Cheshire Limited | Real estate | 2017 |
| WRS (Herts) Limited | Administrative & support | 2014 |
| WS Entertainment Limited | Hospitality | 2026 |
| WS GAS Solutions Limited | Other services | 2019 |
| WST Transport Services Limited | Administrative & support | 2011 |
| WST Travel Limited | Administrative & support | 1991 |
| WTH Heating & Plumbing Limited | Construction | 2023 |
| Wurlitzer Brewery Ltd | Manufacturing | 2019 |
| WWD Properties Ltd | Real estate | 2020 |
| Www.Rigby LLP | | 2008 |
| WYE Foods Ltd | Hospitality | 2025 |
| Wyles Roofing Limited | Construction | 2014 |
| Wyles Roofing North West Ltd | Construction | 2022 |
| Wynnes Garage Limited | Wholesale & retail | 2026 |
| Wyre & Fylde Doorstep Deliveries Limited | Hospitality | 2014 |
| Wyre Brook Park Management Company Limited | Households | 2002 |
| Wyre Dogs Ltd | Other services | 2019 |
| X Roofing Ltd | Construction | 2023 |
| X-Change Electrical Ltd | Construction | 2014 |
| XAC Limited | Financial services | 2018 |
| XAM Salon Limited | Other services | 2025 |
| Xandre Ltd | Professional & scientific | 2007 |
| Xaveric Limited | Professional & scientific | 2014 |
| Xboxparties Ltd | Professional & scientific | 2019 |
| XCL E-Commerce Limited | Wholesale & retail | 2017 |
| XDC 123 Limited | Professional & scientific | 2007 |
| Xela Consulting Ltd | Information & communication | 2021 |
| XGD Services Ltd | Other services | 2013 |
| Xlps Limited | Administrative & support | 2003 |
| XM15NAS Limited | Administrative & support | 2026 |
| Xmerce Ltd | Wholesale & retail | 2024 |
| Xpertise Go Limited | Professional & scientific | 2017 |
| Xplort Limited | Wholesale & retail | 2015 |
| XS Assets Limited | Administrative & support | 2014 |
| XS Microbar Ltd | Hospitality | 2025 |
| Xtra Sound and Vision Limited | Wholesale & retail | 2014 |
| Xwired Games LLP | | 2010 |
| Y.J.R. Limited | Financial services | 2016 |
| Y7 Hotels Limited | Hospitality | 2018 |
| Yacht Vision Marine Limited | Extraterritorial | 2024 |
| Yafafa Yachting Ltd | Households | 2024 |
| Yagi Logistics Ltd | Transport & logistics | 2026 |
| Yard Club Ltd | Real estate | 2017 |
| Yard Nest Developments Ltd | Real estate | 2023 |
| Yarvee Ltd | Information & communication | 2026 |
| Yasalam Clinical Services Ltd | Wholesale & retail | 2020 |
| Yates & Sons Properties Limited | Real estate | 2023 |
| Yates Consultancy Services Limited | Professional & scientific | 2025 |
| Yates Enterprises Ltd | Professional & scientific | 2025 |
| Yayzi Broadband Limited | Information & communication | 2021 |
| Yayzi Group Limited | Information & communication | 2019 |
| YCF Services Limited | Information & communication | 2018 |
| YDM Trading Ltd | Wholesale & retail | 2020 |
| Yeemin Ltd | Hospitality | 2016 |
| Yegates Properties Ltd | Real estate | 2025 |
| Yellow Spot Consulting Ltd | Information & communication | 2012 |
| YES Appliance Rentals Wigan Ltd | Administrative & support | 2017 |
| YES Invest Ltd | Real estate | 2018 |
| YEW Tree Leisure Ltd | Wholesale & retail | 2023 |
| YGM Trading UK Ltd | Wholesale & retail | 2025 |
| YHB Consulting Limited | Professional & scientific | 2008 |
| YHG Limited | Information & communication | 2018 |
| YHG Properties Limited | Real estate | 2023 |
| Yinmic Ltd | Health & social care | 2026 |
| Ymca Trust | Real estate | 2017 |
| YNH Limited | Administrative & support | 2007 |
| Yona 3 Yachting Limited | Other services | 2024 |
| York Homes Development Ltd. | Construction | 2002 |
| York Staff Services Ltd | Hospitality | 2019 |
| York Street Car Parks Limited | Real estate | 2020 |
| Yorkshire Drives Patios & Landscapes Limited | Administrative & support | 2023 |
| Young-Exec Ltd | Professional & scientific | 2013 |
| Your Maintenance Buddy Ltd | Professional & scientific | 2019 |
| Your Personal Organiser Ltd | Professional & scientific | 2014 |
| Youth Fashions Ltd | Wholesale & retail | 2025 |
| Yuan Yuan Massage Ltd | Health & social care | 2021 |
| Z & H Enterprise Ltd | Hospitality | 2024 |
| Z Pizza & Kebab Ltd | Hospitality | 2025 |
| Z.A.K Catering Ltd | Hospitality | 2025 |
| Zabeer Hussain Consultancy Ltd | Information & communication | 2018 |
| ZAC Homes Ltd | Real estate | 2016 |
| ZAF Medical Services Ltd | Health & social care | 2023 |
| Zafer BEY Ltd | Manufacturing | 2024 |
| Zainab’S Food Limited | Hospitality | 2025 |
| Zamrashd Properties Limited | Financial services | 2022 |
| Zapbuy Ltd | Wholesale & retail | 2024 |
| Zarak Consulting Limited | Professional & scientific | 2018 |