| Weetwood Services Limited | Professional & scientific | 1998 |
| Well Funny CIC | Education | 2026 |
| Wellbeing - Trusted Circle Ltd | Professional & scientific | 2024 |
| Welsh Dragon Enterprises Limited | Extraterritorial | 2013 |
| Wepre Inns Limited | Construction | 1979 |
| Werewolf Gaming Ltd | Information & communication | 2023 |
| Westford Homes Limited | Construction | 2006 |
| WGR79 Limited | Construction | 2021 |
| Wheelsorted Ltd | Wholesale & retail | 2020 |
| Wheely Nice Kitchens & Bathrooms Ltd | Administrative & support | 2026 |
| White Rabbit Academy Ltd | Education | 2024 |
| White Shirt Investments Ltd | Real estate | 2016 |
| Whitley Civil Engineering Limited | Extraterritorial | 1984 |
| Whitley Estates Limited | Real estate | 1980 |
| Wild Earth Mother Village CIC | Education | 2026 |
| Wildflower Accountancy Limited | Professional & scientific | 2024 |
| Wildform Limited | Administrative & support | 2026 |
| Wildwood Quarry Retreat Limited | Hospitality | 2023 |
| Wilgeo Limited | Professional & scientific | 2012 |
| Williams Holt Properties Limited | Real estate | 2022 |
| Williams Investment Holdings Limited | Construction | 2018 |
| Wilson Brother Holdings Ltd | Financial services | 2024 |
| Wilson Performance Golf Ltd | Arts & recreation | 2026 |
| Wind 2 Holdings LLP | | 2019 |
| Wind 2 Limited | Energy | 2016 |
| Wind 2 Project 7 Limited | Energy | 2024 |
| WIND20 Limited | Energy | 2023 |
| Wirral Plumb-Fix Limited | Construction | 2013 |
| Wise Hill Ltd | Information & communication | 2021 |
| Wittur Limited | Wholesale & retail | 1990 |
| Wonda Ltd | Information & communication | 2020 |
| Wood Store NW Limited | Wholesale & retail | 2021 |
| Worthington Rentals Ltd | Real estate | 2025 |
| WOW Education Services Limited | Education | 2021 |
| WOW Project Ltd | Education | 2021 |
| Wrexham Powder Coat Limited | Manufacturing | 2021 |
| Wrights Developments Ltd | Construction | 2023 |
| Wrights Letting Ltd | Real estate | 2025 |
| WW Dent Limited | Health & social care | 2025 |
| WWW UK Investments Lettings Ltd. | Real estate | 2006 |
| Wyllow Properties Limited | Real estate | 2017 |
| XG IT Ltd | Information & communication | 2023 |
| Xpress Pizza and Kebab Ltd | Hospitality | 2025 |
| Y Tebot Ltd | Hospitality | 2025 |
| YAZ Designs Limited | Professional & scientific | 2022 |
| Yewbarrow Limited | Wholesale & retail | 2009 |
| Yotems World Limited | Extraterritorial | 2024 |
| YR Ystablau YN Garth Limited | Hospitality | 2023 |
| Zayn Property NW Ltd | Real estate | 2025 |
| Zealots Coffee and Tea Ltd | Wholesale & retail | 2018 |
| Zenith Communications Limited | Information & communication | 2024 |
| Zinc Surveyors Ltd | Professional & scientific | 2021 |
| ZOK Limited | Professional & scientific | 2019 |