| Willowbrook Park (Block One) Management Company Limited | Households | 2008 |
| Willowbrook Park (Block Two) Management Company Limited | Households | 2008 |
| Willowflow Group Ltd | Information & communication | 2024 |
| Willson Grange Limited | Financial services | 2012 |
| Willson Grange Mortgages Limited | Financial services | 2019 |
| Willson Grange Wills & Estates Ltd | Financial services | 2021 |
| Wilson Automation and Home Solutions Ltd. | Wholesale & retail | 2025 |
| Wilson Test Services Limited | Information & communication | 2015 |
| Wilsons Development & Construction Ltd | Construction | 2014 |
| Wilton Grange Management Company Limited | Households | 1975 |
| Wilton Legal Services Limited | Administrative & support | 2015 |
| WIN the Morning Ltd | Professional & scientific | 2025 |
| WIN24 Ltd | Information & communication | 2005 |
| Window Shades by Charlotte Ltd | Wholesale & retail | 2024 |
| Windsor Court (Greasby) Management Company Limited | Households | 1973 |
| Windtunl Limited | Information & communication | 2025 |
| Windward Health Ltd | Wholesale & retail | 2018 |
| Windward Holdings (Wirral) Ltd | Financial services | 2024 |
| Winfylands Management Co. Limited | Real estate | 2020 |
| Wingate Road Allotments Association | Agriculture & fishing | 2012 |
| Winged BUS Driver Ltd | Transport & logistics | 2018 |
| Winnieswins Ltd | Administrative & support | 2024 |
| Winstanley Estate Community Management Company Limited | Real estate | 2020 |
| Winstanley Property Management Ltd | Extraterritorial | 2015 |
| Winter Knight Investments Ltd | Real estate | 2021 |
| Winter Power Engineering Ltd | Other services | 2022 |
| Wired IT Consulting & Technology Ltd | Information & communication | 2024 |
| Wired Property Services Limited | Administrative & support | 2024 |
| Wirral & Chester Tagb Limited | Arts & recreation | 2008 |
| Wirral 11+ Academy Ltd | Education | 2011 |
| Wirral 3LS | Education | 2006 |
| Wirral Accounting Limited | Professional & scientific | 2011 |
| Wirral Accounting Taxation Services Limited | Professional & scientific | 2012 |
| Wirral Advertising Media Limited | Administrative & support | 2012 |
| Wirral Aerials Limited | Professional & scientific | 2014 |
| Wirral Aesthetics and Beauty Academy Limited | Education | 2024 |
| Wirral Aquatics Ltd | Wholesale & retail | 2024 |
| Wirral Archaeology CIC | Other services | 2020 |
| Wirral Auto Rentals Limited | Administrative & support | 2020 |
| Wirral Autos Limited | Wholesale & retail | 2008 |
| Wirral Bathrooms Ltd | Wholesale & retail | 2014 |
| Wirral Blue Sky Ltd | Hospitality | 2021 |
| Wirral Bookkeeping Ltd | Professional & scientific | 2023 |
| Wirral Books Ltd | Wholesale & retail | 2025 |
| Wirral Branch Limited | Agriculture & fishing | 2022 |
| Wirral Build & Renovation Ltd | Construction | 2020 |
| Wirral Cafe Bars Ltd | Hospitality | 2025 |
| Wirral Car Care Ltd | Wholesale & retail | 2011 |
| Wirral Care Ltd | Health & social care | 2015 |
| Wirral Carers Alliance CIC | Health & social care | 2025 |
| Wirral Catering Equipment Limited | Wholesale & retail | 2004 |
| Wirral Central Heating Ltd | Construction | 2024 |
| Wirral Club Limited | Arts & recreation | 2017 |
| Wirral Club Trading Limited | Hospitality | 2018 |
| Wirral Coast Property Ltd | Households | 2019 |
| Wirral Community Computers CIC | Other services | 2025 |
| Wirral Contract Cleaning & Facilities Ltd | Administrative & support | 2023 |
| Wirral Convenience Store Ltd | Wholesale & retail | 2026 |
| Wirral Custom Campers Limited | Wholesale & retail | 2020 |
| Wirral Dampcourse Limited | Construction | 2025 |
| Wirral Dental Education Ltd | Real estate | 2021 |
| Wirral Discount Store Limited | Wholesale & retail | 2024 |
| Wirral Dog Groomers Ltd | Other services | 2025 |
| Wirral Drain Unblockers Ltd | Administrative & support | 2026 |
| Wirral Driving Limited | Education | 2009 |
| Wirral Eco Retrofit Ltd | Construction | 2022 |
| Wirral Electric Gates Limited | Manufacturing | 2013 |
| Wirral Financial Limited | Professional & scientific | 2018 |
| Wirral Financial Services Ltd | Financial services | 2002 |
| Wirral Flooring Limited | Construction | 1980 |
| Wirral Forest: Wellbeing CIC | Health & social care | 2022 |
| Wirral GAS Fitters Ltd | Construction | 2026 |
| Wirral Glazing Contractors Limited | Construction | 1985 |
| Wirral Grammar School for Boys | Education | 2011 |
| Wirral Hair Design Ltd | Other services | 2023 |
| Wirral Hair Limited | Administrative & support | 2017 |
| Wirral Hair Therapy Ltd | Other services | 2020 |
| Wirral Honda Ltd | Wholesale & retail | 2017 |
| Wirral Hospice ST John's | Health & social care | 1980 |
| Wirral Hybrid and EV Limited | Administrative & support | 2021 |
| Wirral Insulation Supplies Ltd | Wholesale & retail | 2015 |
| Wirral Interiors Limited | Construction | 2025 |
| Wirral Islamic Cultural Centre and Shahjalal Mosque Ltd | Other services | 2004 |
| Wirral IT Solutions Limited | Information & communication | 2021 |
| Wirral Kitchen Fitters Ltd | Construction | 2022 |
| Wirral Kitchen Ltd | Hospitality | 2018 |
| Wirral Land Developments Ltd | Real estate | 2017 |
| Wirral Landlord Services Limited | Construction | 2020 |
| Wirral Learning Hub Limited | Education | 2024 |
| Wirral Letting Ltd | Real estate | 2023 |
| Wirral Lift Engineering Limited | Professional & scientific | 2025 |
| Wirral Media Walls Limited | Construction | 2020 |
| Wirral Model Engineering Society | Other services | 1996 |
| Wirral Mortgage Services Limited | Financial services | 2015 |
| Wirral Motor Services Limited | Wholesale & retail | 2008 |
| Wirral Network Chauffeurs Ltd | Transport & logistics | 2022 |
| Wirral Nice Pizza Ltd | Hospitality | 2023 |
| Wirral Nutrition Ltd | Wholesale & retail | 2023 |
| Wirral Oasis Ltd | Construction | 2025 |
| Wirral Open Award Centre C.I.C. | Other services | 2024 |