| Whiteley Woods Limited | Real estate | 2021 |
| Whitemark Partnership Ltd | Administrative & support | 2025 |
| Whitemoor Design Build Limited | Construction | 2003 |
| Whitenings Limited | Construction | 2016 |
| Whiteson Holdings Limited | Professional & scientific | 2024 |
| Whiteson Logistics Limited | Transport & logistics | 2025 |
| Whitestone Cleaning Services Ltd | Administrative & support | 2026 |
| Whitham and Williams Limited | Wholesale & retail | 1986 |
| Whitham Properties Limited | Real estate | 1995 |
| Whitlam & Co Accountants Ltd | Professional & scientific | 2025 |
| Whitley Hall Hotel Limited | Hospitality | 1981 |
| Whitley One Ltd | Real estate | 2023 |
| Whitney Construction Management Services Limited | Other services | 2008 |
| Whitt & Co Limited | Administrative & support | 2026 |
| Whittaker Plant Hire Limited | Construction | 2020 |
| Whittaker's Jewellers Limited | Wholesale & retail | 2004 |
| Whittier Consulting Limited | Professional & scientific | 2022 |
| Whitworks Adventures in Theatre | Education | 2015 |
| Whitworth Court Limited | Households | 1976 |
| Whitworth Croft Management Company Limited | Real estate | 2006 |
| Whitworth Investments Limited | Real estate | 2023 |
| WHJ Glossop Ltd | Real estate | 2021 |
| WHM Partners UK Ltd | Manufacturing | 2011 |
| WHO Cycles Ltd | Wholesale & retail | 2009 |
| Wholesale Artificial Grass Limited | Administrative & support | 2013 |
| Wholesale Clearance 4 U Ltd | Wholesale & retail | 2024 |
| Wholesale Thermal Labels Ltd | Manufacturing | 2026 |
| Wholsale Price Point Ltd | Wholesale & retail | 2025 |
| Whoosh 2013 Limited | Manufacturing | 2013 |
| Whumzee Group Ltd | Wholesale & retail | 2024 |
| WHW Contractors Limited | Construction | 2021 |
| WHW Estates Limited | Real estate | 2021 |
| WHW Trading Limited | Wholesale & retail | 2026 |
| WHY Project Management Limited | Professional & scientific | 2011 |
| Wicker Blonk Limited | Wholesale & retail | 2025 |
| Wicker Employee Trustee Ltd | Professional & scientific | 2012 |
| Wicker Foods Ltd | Hospitality | 2018 |
| Wicker Tyres (UTE) Ltd | Wholesale & retail | 2018 |
| Wicker Tyres Waste Solutions Limited | Water & waste | 2022 |
| Wickersham Limited | Professional & scientific | 1999 |
| Wickersley Chiropody and Podiatry Limited | Health & social care | 2019 |
| Wickersley Estates (Holdings) Limited | Financial services | 2016 |
| Wickersley Estates Limited | Real estate | 1997 |
| Wickersley Foot Clinic Ltd | Health & social care | 2022 |
| Wickersley Properties Limited | Real estate | 2016 |
| Wickersley Property Lettings Limited | Real estate | 2014 |
| Wicklowe Automation Ltd | Manufacturing | 2020 |
| Wickmere Nott'M Limited | Administrative & support | 2016 |
| Widdup Motorsport Ltd | Information & communication | 2023 |
| Wideshires Ltd | Real estate | 2026 |
| Widgisoft Limited | Information & communication | 2008 |
| Wiffle Waffle (Matlock Bath) Ltd | Other services | 2023 |
| Wifi Solutions Sheffield Ltd | Information & communication | 2022 |
| Wigmore Developments Limited | Construction | 2015 |
| Wigsbyhairbaws Limited | Wholesale & retail | 2024 |
| Wihr Group Ltd | Construction | 2024 |
| Wikam Cleaning Services Ltd | Administrative & support | 2024 |
| Wilbut Homes Ltd | Real estate | 2025 |
| Wilcox Limited | Real estate | 2018 |
| Wild About Travel Limited | Administrative & support | 2005 |
| Wild BEE Conservation Ltd | Education | 2024 |
| Wild Boar Holiday Lets Ltd | Hospitality | 2025 |
| Wild Electrical Ltd | Construction | 2024 |
| Wild Live Ltd | Wholesale & retail | 2017 |
| Wild Moose on the Loose Ltd | Wholesale & retail | 2021 |
| Wild Peak Holdings Ltd | Education | 2016 |
| Wild Peak Property Ltd | Real estate | 2017 |
| Wild Peak Property Management Ltd | Real estate | 2017 |
| Wild Zone Limited | Professional & scientific | 2010 |
| Wildcat Digital Ltd | Information & communication | 2018 |
| Wilde Rovira Consulting Limited | Health & social care | 2011 |
| Wilder Electrical Limited | Construction | 2007 |
| Wildewizard Ltd | Professional & scientific | 2012 |
| Wildig Property Solutions Limited | Real estate | 2020 |
| Wildlife Supplies UK Ltd | Extraterritorial | 2011 |
| Wildscapes Community Interest Company | Administrative & support | 2006 |
| Wildsole Limited | Manufacturing | 2023 |
| Wiles-Rutherford Medical Ltd | Health & social care | 2019 |
| Wilfred Property Management Ltd | Households | 2019 |
| Wilheat Underfloor Ltd | Construction | 2026 |
| Wilkes Wood Limited | Professional & scientific | 2023 |
| Wilkins Media Limited | Professional & scientific | 2025 |
| Wilkinson Business Advisory Services Limited | Professional & scientific | 2004 |
| Wilkinson Construction Services Ltd | Construction | 2020 |
| Wilkinson Doyle Bars & Inns Limited | Hospitality | 2020 |
| Wilkinson Fuels Ltd | Wholesale & retail | 2022 |
| Wilkinson Lane Serviced Apartments Ltd | Real estate | 2019 |
| Wilkinson Orthopaedics Ltd | Health & social care | 2017 |
| Will Aust Architecture Limited | Professional & scientific | 2019 |
| Will Martyr Art Limited | Arts & recreation | 2016 |
| Will Street Productions Limited | Professional & scientific | 2018 |
| Will Tomson Landscape and Garden Design Ltd | Administrative & support | 2023 |
| WILL4ADVENTURE Limited | Arts & recreation | 2015 |
| Willa Homes Ltd | Real estate | 2023 |
| Willan Metals Limited | Professional & scientific | 1931 |
| Willdoo Ltd | Wholesale & retail | 2016 |
| Willersley Properties Limited | Real estate | 2013 |
| Willesdens Holdings Limited | Financial services | 2025 |
| Willesdens Ltd | Manufacturing | 2017 |
| William Beardmore & Co.,Limited | Professional & scientific | 1902 |