| Wildestdreamsuk Ltd | Wholesale & retail | 2022 |
| Will Writing Network Limited | Professional & scientific | 2014 |
| Willaston Services Ltd | Wholesale & retail | 2026 |
| Willdan Limited | Extraterritorial | 1996 |
| William Keith Spooner & SON Ltd. | Wholesale & retail | 2025 |
| Williams Motor Company Ltd | Wholesale & retail | 2019 |
| Williams of Audlem Ltd | Wholesale & retail | 2013 |
| Willow and Oliver Property Limited | Real estate | 2025 |
| Willowtree Publications Ltd | Wholesale & retail | 2023 |
| Wina Consulting Ltd | Professional & scientific | 2019 |
| Winch & Wrench Limited | Wholesale & retail | 2026 |
| Wind Technician UK Limited | Transport & logistics | 2024 |
| Windmaster Limited | | 1932 |
| Windmill Investment Properties Limited | Real estate | 2021 |
| Winterley Pool Farm Limited | Other services | 2022 |
| Wirral Diagnostics Ltd | Health & social care | 2019 |
| Wisa Services Ltd | Administrative & support | 2020 |
| Wise Move UK Properties Limited | Extraterritorial | 2025 |
| Wisefix Ltd | Wholesale & retail | 2025 |
| Wiseguru Limited | Education | 2023 |
| Wishing Well Project | Other services | 2007 |
| Wishing Well Trading Company Limited | Hospitality | 2023 |
| Wistaston Academy Trust | Education | 2014 |
| Wistonia Group Limited | Construction | 2013 |
| Wlcp Trading Limited | Hospitality | 2021 |
| WM 99 Limited | Financial services | 2023 |
| Wm.Loose & Company Limited | Professional & scientific | 1926 |
| Wofsel Ltd | Real estate | 2019 |
| WOK This Way (Sheff) Limited | Hospitality | 2025 |
| Wolfs Service Garage Limited | Wholesale & retail | 2016 |
| Wollaston Investments Ltd | Construction | 2026 |
| Wonder Digital Ltd | Professional & scientific | 2020 |
| Wood's Property Lets Ltd | Real estate | 2016 |
| Woohoo Marketing Crew Ltd | Professional & scientific | 2025 |
| Woollyback Films Limited | Information & communication | 2007 |
| Woolner Limited | Wholesale & retail | 2023 |
| Wootton Education Limited | Education | 2013 |
| Work Best Ltd | Professional & scientific | 2018 |
| Workplace Project Services Limited | Professional & scientific | 2019 |
| World of Spectre Ltd | Information & communication | 2025 |
| World Pickleball Media Ltd | Manufacturing | 2025 |
| Worldwide Services Group Limited | Professional & scientific | 2007 |
| Worthington Consultancy LLP | | 2025 |
| WOW Cosmetics Ltd | Wholesale & retail | 2023 |
| WR Estates Limited | Real estate | 2019 |
| WR Property Cheshire Ltd | Real estate | 2023 |
| Wrekin House Management Limited | Households | 1988 |
| Wright Compliance Limited | Construction | 2025 |
| Wrightvan Ltd | Transport & logistics | 2025 |
| WRT Trading Limited | Hospitality | 2016 |
| WSG Fire Safety Consultancy Ltd | Professional & scientific | 2017 |
| Wychwell Limited | Professional & scientific | 2006 |
| Wychwood Park Hotel Company Limited | Hospitality | 2019 |
| Wychwood Property Services Limited | Real estate | 2026 |
| Xaver Holdings Limited | Financial services | 2019 |
| Xaver Renewables Ltd | Energy | 2024 |
| Xaver Roofing Ltd | Construction | 2016 |
| XCL Limited | Professional & scientific | 1997 |
| XI Collective Ltd | Other services | 2025 |
| Xodiav Ltd | Other services | 2000 |
| Xpress Document Solutions Limited | Information & communication | 2013 |
| XRB Ltd | Wholesale & retail | 2018 |
| XYZ Logistics Limited | Administrative & support | 2021 |
| XYZ Operations Ltd | Construction | 2019 |
| XYZ Sounds Ltd | Information & communication | 2025 |
| Yapclyndith Limited | Health & social care | 2021 |
| Yarns With Alice Ltd | Wholesale & retail | 2013 |
| Yates Auto Trades Limited | Wholesale & retail | 2025 |
| Yeates M Developments Ltd | Construction | 2025 |
| Yelir World Ltd | Wholesale & retail | 2017 |
| Yellow Fish Properties Ltd | Real estate | 2024 |
| Yellow Space Developments Ltd | Real estate | 2018 |
| Yetmay Ltd | Information & communication | 2013 |
| YEW Tree Consulting (Cheshire) Limited | Information & communication | 2014 |
| Yoth Disgorger Ltd | Wholesale & retail | 2022 |
| Young Folks Care Limited | Health & social care | 2025 |
| Your Bear Town Magazine Limited | Information & communication | 2019 |
| Your Project Blueprint Ltd | Administrative & support | 2022 |
| Your Solutions Limited | Wholesale & retail | 2009 |
| Yourfixes Ltd | Households | 2024 |
| Yours in Sport Limited | Agriculture & fishing | 2023 |
| Yoursparkle Ltd | Administrative & support | 2024 |
| Yourstays Management Ltd | Real estate | 2019 |
| Yoxall Property Ltd | Real estate | 2022 |
| YR Trade Bliss Ltd | Wholesale & retail | 2024 |
| Ysp-Aerial Sky-Level-Protector Ltd | Transport & logistics | 2025 |
| Yvonne Bell Consultancy Ltd | Professional & scientific | 2023 |
| Zabka Holding Limited | Financial services | 2025 |
| Zabka Polski Sklep Limited | Wholesale & retail | 2016 |
| Zadareni Ltd | Transport & logistics | 2021 |
| Zajac Ltd | Construction | 2023 |
| Zalsh Limited | Real estate | 2016 |
| Zandi Valeting and Tyres Ltd | Wholesale & retail | 2019 |
| ZED786 Company Ltd | Professional & scientific | 2022 |
| ZEE UK Transportation Ltd | Transport & logistics | 2018 |
| Zeigarnik Ltd | Financial services | 2023 |
| ZEN Consultants Limited | Professional & scientific | 2021 |
| ZEN Publications Limited | Information & communication | 2007 |
| ZEN Tax & Accountancy Ltd | Professional & scientific | 2015 |
| Zepland Ltd | Real estate | 2025 |