| Wrexham County Driveways Limited | Construction | 2024 |
| Wriggles & Giggles Ltd | Health & social care | 2020 |
| Wright Direction Paving & Landscaping Ltd | Construction | 2019 |
| Wright Direction Sales & Lettings Ltd | Real estate | 2024 |
| Wright Slice Food Support CIC | Wholesale & retail | 2026 |
| Wrightway to Travel Limited | Transport & logistics | 2011 |
| Wrigley Partington Limited | Extraterritorial | 2013 |
| WS Courier Services Ltd | Transport & logistics | 2017 |
| WS Coventry Ltd | Hospitality | 2023 |
| WS Mawey Ltd | Health & social care | 2018 |
| WS Plus Art & Tech (London) Limited | Wholesale & retail | 2022 |
| WS1 Live Lounge Ltd | Hospitality | 2026 |
| WS3 Bloxwich Limited | Hospitality | 2025 |
| WS3 Decorators Limited | Construction | 2024 |
| WS3 Garden Limited | Hospitality | 2021 |
| WS3 Security Systems Ltd | Administrative & support | 2017 |
| WS4 Dental Care Ltd | Health & social care | 2010 |
| WS4 Investments Limited | Real estate | 2016 |
| WS4 Ltd | Wholesale & retail | 2016 |
| WS4 Properties Limited | Real estate | 2016 |
| WS9 Dream Dental Ltd | Health & social care | 2014 |
| WS9 Fitness Limited | Arts & recreation | 2025 |
| Wshilla Limited | Health & social care | 2014 |
| WSJ Properties Limited | Real estate | 2016 |
| WSL Food Services Ltd | Hospitality | 2022 |
| WSM Systems Ltd | Information & communication | 2018 |
| Wsqy Limited | Hospitality | 2022 |
| WTM Properties Limited | Real estate | 2025 |
| WV Foods Limited | Hospitality | 2022 |
| WV10 Foods Ltd | Hospitality | 2025 |
| WW Commercial Limited | Wholesale & retail | 2005 |
| Wwkool Fluid Power Limited | Manufacturing | 2025 |
| Wyattrose Homes Ltd | Real estate | 2024 |
| Wyndley Auction Sales Limited | Wholesale & retail | 1973 |
| Wyrley Fish Bar Limited | Hospitality | 2012 |
| Wyrley Juniors Football Club Limited | Arts & recreation | 2011 |
| Wyrley Management Limited | Real estate | 2016 |
| Wyrley Pizza Limited | Hospitality | 2026 |
| Wyrley Wine Lords Ltd | Wholesale & retail | 2016 |
| Wyton Music Ltd | Information & communication | 2024 |
| X L Management Ltd | Other services | 2012 |
| X-Clusive Luxury Group Ltd | Transport & logistics | 2023 |
| X-Press Legal Services (Central) Ltd | Administrative & support | 2020 |
| X4TRA Ltd | Wholesale & retail | 2024 |
| Xcalibur Limited | Construction | 2020 |
| Xclusive Transportation Ltd | Transport & logistics | 2023 |
| XEOS99 Limited | Financial services | 2020 |
| Xhaulage Limited | Transport & logistics | 2025 |
| Xiaoboshi Trading UK Ltd | Manufacturing | 2026 |
| XIE GUI Ltd | Transport & logistics | 2026 |
| XIN BAO Ltd | Administrative & support | 2017 |
| XKI Ltd | Hospitality | 2025 |
| XL Property Holding Limited | Financial services | 2026 |
| XL Technical Services Ltd | Manufacturing | 2007 |
| XLC Executive Limited | Transport & logistics | 2024 |
| XO Wines Ltd | Wholesale & retail | 2021 |
| Xplor Market Limited | Information & communication | 2020 |
| Xpress Design and Print Limited | Manufacturing | 2010 |
| Xpressive Business Solutions Ltd | Administrative & support | 2010 |
| Xqzt Ltd | Real estate | 2024 |
| Xraymike-Reporting Ltd | Health & social care | 2018 |
| Xstrahl Group Holdings Limited | Financial services | 2018 |
| Xstrahl Group Limited | Professional & scientific | 2015 |
| Xstrahl Limited | Manufacturing | 1995 |
| Xtrav Properties Limited | Real estate | 2025 |
| Xtravolt Electrical Contractors Ltd | Construction | 2026 |
| Xtreme Cleaners (West Midlands) Ltd | Administrative & support | 2025 |
| Xylo Travel Ltd | Transport & logistics | 2025 |
| Xysuh Ltd | Information & communication | 2022 |
| Y - Base Limited | Health & social care | 2015 |
| Y&S Homes Ltd | Real estate | 2024 |
| Yakoob Properties Limited | Real estate | 2019 |
| Yanafella Ltd | Manufacturing | 2018 |
| Yanis Construct Ltd | Construction | 2026 |
| Yanis Direct Limited | Other services | 2015 |
| Yanis Speed Ltd | Manufacturing | 2025 |
| Yanochawalsall Limited | Wholesale & retail | 2025 |
| Yantos Limited | Hospitality | 2016 |
| Yashika & Bhavika Financial Enterprises Limited | Financial services | 2011 |
| Yasmin Banqueting Ltd | Other services | 2025 |
| Yatai Limited | Wholesale & retail | 2012 |
| Yates Bros (Norton Canes) Limited | Agriculture & fishing | 2012 |
| Yates Construction Limited | Construction | 2002 |
| YB Enterprise Limited | Extraterritorial | 2010 |
| YB Hair UK Ltd | Other services | 2023 |
| YE Old Toll House Restaurant Limited | Hospitality | 2001 |
| Yelex Limited | Wholesale & retail | 2015 |
| Yellow & Blue Limited | Financial services | 2025 |
| Yellow Brick Properties Ltd | Real estate | 2023 |
| Yellow Door Education Solutions Ltd | Education | 2013 |
| YEW Tree Brookvale Ltd | Hospitality | 2022 |
| YEW Tree Court Residents Association Company Limited | Professional & scientific | 1981 |
| YEW Tree Hall Properties Limited | Real estate | 2016 |
| YEW Tree Pharmacy Limited | Wholesale & retail | 1996 |
| Yewdale (Harborne) Limited | Real estate | 2012 |
| YHM Hospitality Limited | Hospitality | 2024 |
| Yhwh Limited | Professional & scientific | 2014 |
| Yiacoumis Z Limited | Real estate | 2001 |
| YK Car Sales Ltd | Wholesale & retail | 2021 |
| YKB Property Limited | Real estate | 2025 |