| Wasted Talent Productions Limited | Arts & recreation | 1985 |
| Watch and Clock Parts Limited | Wholesale & retail | 2017 |
| Watchcom Security Limited | Information & communication | 2009 |
| Water Infrastructure UK Limited | Construction | 2023 |
| Water Jetting Training Academy Ltd | Education | 2020 |
| Waterborn Limited | Information & communication | 2003 |
| WATERBOTTLES4YOU Limited | Wholesale & retail | 2024 |
| Waterfall Investments Ltd | Professional & scientific | 2024 |
| Waters Edge Property Ltd | Real estate | 2025 |
| Waterside Estate Management Company Ltd | Real estate | 2013 |
| Watersmeet Enterprises Limited | Other services | 2014 |
| Waterview Park RTM Company Limited | Households | 2011 |
| Watson Allan Engineering Limited | Information & communication | 2010 |
| Watson Consulting Services Limited | Professional & scientific | 2018 |
| Watt & Partners LLP | | 2013 |
| Watto Towers Holdings Limited | Financial services | 2025 |
| Wave and Wheel Ltd | Arts & recreation | 2025 |
| Wavell Room Limited | Information & communication | 2022 |
| Waverley Maintenance Limited | Construction | 2021 |
| Waves Marketing Ltd | Professional & scientific | 2018 |
| Wayahead Tuition Limited | Professional & scientific | 2003 |
| Wayfarer Group Limited | Administrative & support | 2002 |
| Wayman Developments and Investments Ltd | Real estate | 2023 |
| Wayman Flats Limited | Administrative & support | 1990 |
| Waymark Enterprise Ltd | Wholesale & retail | 2020 |
| Wayne Ferguson Media Limited | Professional & scientific | 2019 |
| Wayne Homes (Bournemouth) Ltd | Real estate | 2021 |
| Wayne Road Church Cottages Limited | Households | 2023 |
| WB Electrical Contractors Limited | Construction | 2005 |
| WBP Property Development Ltd | Construction | 2024 |
| WBP Shells Ltd | Construction | 2021 |
| Wdbasic Limited | Professional & scientific | 2016 |
| WE ARE Financial Planners Limited | Financial services | 2019 |
| WE ARE Herd (Holdings) Ltd | Financial services | 2021 |
| WE ARE Herd Ltd | Administrative & support | 2017 |
| WE ARE Herd Pioneer Properties Ltd | Real estate | 2021 |
| WE ARE RGM Ltd | Information & communication | 2009 |
| WE ARE UP & UP Ltd | Administrative & support | 2025 |
| WE Maintain Group (Energy) Ltd | Energy | 2022 |
| WE Maintain Group (Maintenance) Ltd | Energy | 2022 |
| WE Sabii LDN Ltd | Wholesale & retail | 2021 |
| Wealth Pilot Ltd | Other services | 2024 |
| WEAREHEALTH0 Limited | Wholesale & retail | 2026 |
| Weatherbury Limited | Professional & scientific | 2017 |
| Weavers Wharf Development Ltd | Construction | 2022 |
| Weaving Things Limited | Information & communication | 2018 |
| Web Analysis Solutions Limited | Information & communication | 2012 |
| Web WIZ Ltd | Information & communication | 2006 |
| Webb & Co (Hennings) Limited | Real estate | 2020 |
| Webb & Co (South) Limited | Real estate | 2019 |
| Webb Capital Investment Limited | Real estate | 2018 |
| Webbles Ltd | Information & communication | 2021 |
| Webcontext Limited | Information & communication | 2020 |
| Webineer Limited | Information & communication | 2022 |
| Wedd & White Limited | Wholesale & retail | 2016 |
| Wedding Sparrow Ltd | Extraterritorial | 2013 |
| Weebub Ltd | Wholesale & retail | 2024 |
| Weird.Inc Ltd | Wholesale & retail | 2022 |
| WEJ Exports Limited | Transport & logistics | 2023 |
| Welcome Mortgage Solutions Ltd | Financial services | 2007 |
| Weld Health Ltd | Health & social care | 2018 |
| Weldham Limited | Manufacturing | 2020 |
| Weldrite Group Limited | Construction | 2017 |
| Weldrite Special Works Limited | Construction | 2016 |
| Weldrite Structures Limited | Construction | 2002 |
| Weldtec Fabrications Limited | Manufacturing | 2007 |
| Weldtec Holdings Limited | Financial services | 2022 |
| Welinkanything Ltd | Information & communication | 2026 |
| Weliving UK Limited | Administrative & support | 2026 |
| Well Drawn Brewing Company Limited | Manufacturing | 2017 |
| Well Hung Doors Ltd | Construction | 2022 |
| Wellington Close (Walton-On-Thames) Management Company Limited | Households | 1988 |
| Wellington King Limited | Professional & scientific | 2015 |
| Wellington Vine Ltd | Real estate | 2015 |
| Wellness GP Limited | Health & social care | 2023 |
| Wellpond Investment Holdings Ltd | Financial services | 2017 |
| Wells & Grau Limited | Health & social care | 2009 |
| Wells Transport Services Ltd | Transport & logistics | 2023 |
| Wellware Labs Ltd | Information & communication | 2025 |
| Wendly Ltd | Wholesale & retail | 2024 |
| Wenfang Ltd | Hospitality | 2021 |
| Wentworth Heights Management Company Ltd | Households | 2019 |
| Werner Nebonne Limited | Information & communication | 2022 |
| Wesat Properties Ltd | Real estate | 2024 |
| Wesat UK Ltd | Construction | 2020 |
| Wesley Chambers Ltd | Real estate | 2012 |
| Wesleyan Church Management Limited | Real estate | 2022 |
| Wessex Automotive Detailing Ltd | Administrative & support | 2022 |
| Wessex Cars (UK) Limited | Transport & logistics | 2004 |
| Wessex Commercial Laundry Ltd | Other services | 2026 |
| Wessex Compressors Limited | Manufacturing | 2014 |
| Wessex Country Gammon Limited | Wholesale & retail | 2000 |
| Wessex Court (Parkstone) Management Company Limited | Households | 1998 |
| Wessex Dental Laboratory Limited | Manufacturing | 2011 |
| Wessex Fabrications (Poole) Limited | Manufacturing | 2001 |
| Wessex Health Group Limited | Health & social care | 2019 |
| Wessex Inc Ltd | Administrative & support | 2020 |
| Wessex Marine Limited | Wholesale & retail | 2017 |
| Wessex Mechanical Services Ltd | Construction | 2024 |
| Wessex Medical and Surgical Services Limited | Health & social care | 2014 |