| Watkinson’S Watts Ltd | Construction | 2025 |
| Watson Consultancy Ltd | Construction | 2024 |
| Watts Transformation Limited | Information & communication | 2026 |
| Wave Consulting - Digital Engineers Limited | Professional & scientific | 2017 |
| Wave Innovations Holdings Ltd | Financial services | 2017 |
| WAX Investments Ltd | Real estate | 2026 |
| Waxy Clear Ltd | Administrative & support | 2018 |
| Wayahead Wills and Legacy Planning Limited | Professional & scientific | 2023 |
| Waywood Enterprises Limited | Professional & scientific | 2007 |
| Wcda Group Limited | Financial services | 2018 |
| WDA Planning Limited | Professional & scientific | 2010 |
| WE ARE Oxygen Limited | Construction | 2016 |
| WE Care Auto Repairs Ltd | Wholesale & retail | 2020 |
| WE Lost Doug Limited | Real estate | 2026 |
| WE Love Cars Ltd | Professional & scientific | 2026 |
| WE Love Surveys Limited | Professional & scientific | 2002 |
| We-Talent Group Limited | Administrative & support | 2021 |
| Weather Wise Services Ltd | Transport & logistics | 2017 |
| Weatherford Eurasia Limited | Mining & quarrying | 1989 |
| Weatherford U.K. Limited | Mining & quarrying | 1965 |
| Weaver Technical Solutions Ltd | Professional & scientific | 2018 |
| Web Network Technologies Limited | Information & communication | 2007 |
| Webb Premiumconstruction Ltd | Construction | 2026 |
| Webbir Homes Limited | Construction | 1981 |
| Webbir New Homes Limited | Construction | 1996 |
| Webfuel Limited | Information & communication | 2007 |
| Websites 4 U Limited | Information & communication | 2013 |
| Websters Investments Limited | Financial services | 2010 |
| Weduc Holdings Limited | Financial services | 2021 |
| Weduc UK Limited | Education | 2015 |
| Weekend Maker Ltd | Wholesale & retail | 2026 |
| Weighed in Ltd | Agriculture & fishing | 2020 |
| Weird Ideas Limited | Extraterritorial | 2022 |
| Weis Restaurant Limited | Hospitality | 2012 |
| Weiss Fabrication Ltd | Manufacturing | 2022 |
| Weiss Technik UK Limited | Professional & scientific | 1998 |
| Welding Capacity Limited | Manufacturing | 1996 |
| Weldlink Ltd | Administrative & support | 2024 |
| Weldtex Limited | Manufacturing | 2019 |
| Wellan Ltd | Real estate | 2023 |
| Wellbeing Warriors CIC | Health & social care | 2026 |
| Wells Engineering Ltd | Professional & scientific | 2018 |
| Wells Quayside Management Company Limited | Households | 2012 |
| Wendler-Board Properties Ltd | Real estate | 2025 |
| Wenzel UK Limited | Manufacturing | 1994 |
| Were Wingin IT Ltd | Hospitality | 2021 |
| West Bridgford RFC Limited | Arts & recreation | 2003 |
| West Side Taxis Limited | Transport & logistics | 2012 |
| Westfield EQC Ltd | Administrative & support | 2003 |
| Westfield Place (Loughborough) Management Company Limited | Households | 2013 |
| Westwood Carpentry and Joinery Ltd | Construction | 2023 |
| WFJ Ltd | Real estate | 2021 |
| WFL Media Ltd | Information & communication | 2009 |
| Whale Done Limited | Financial services | 2024 |
| Whanausports Ltd | Wholesale & retail | 2020 |
| Whatton Consulting Limited | Professional & scientific | 2022 |
| Whatton Estate Events Limited | Hospitality | 2017 |
| Whatton Estate Shoot Ltd | Agriculture & fishing | 2010 |
| Wheatcroft (Group) Limited | Financial services | 2012 |
| Wheatcroft Collections Limited | Arts & recreation | 1953 |
| Wheatcroft Properties Limited | Real estate | 1953 |
| Wheeldon & Mitchell Ltd | Wholesale & retail | 2002 |
| Wheeltapper Inns Limited | Hospitality | 2018 |
| Wheelwright & Co. Ltd. | Construction | 2008 |
| Whelband Electrical Services Limited | Construction | 2007 |
| Whelbands Assorted Pet Shelters Limited | Other services | 2014 |
| Whispering Trees C.I.C. | Education | 2018 |
| Whissendine Paudy Homes Ltd | Real estate | 2015 |
| White Bloom & Co Limited | Manufacturing | 2019 |
| White Kite (Burton) Limited | Real estate | 2021 |
| White Kite Holdings 2020 Limited | Households | 2021 |
| White Kite Holdings Limited | Households | 2015 |
| White Ridge Properties Limited | Real estate | 2010 |
| White Star Solar and EV Ltd | Construction | 2026 |
| White Stripe Property Ltd | Real estate | 2017 |
| White Tail Investments Limited | Real estate | 2017 |
| Whitehead Farrier Services Ltd | Agriculture & fishing | 2025 |
| Whitehead's Estate Agents Limited | Real estate | 2017 |
| Whites Commercial Limited | Professional & scientific | 2026 |
| Whitsom Ltd | Wholesale & retail | 2025 |
| Whittaker Office Supplies Limited | Wholesale & retail | 1987 |
| WHM Work Connections Limited | Education | 2011 |
| Whmo Properties Ltd | Real estate | 2021 |
| WHP Performance Limited | Wholesale & retail | 2021 |
| Whyte and Smith Socks Ltd | Wholesale & retail | 2025 |
| Whytedefaoite Ltd | Health & social care | 2024 |
| Whytek Heating Services Limited | Construction | 2007 |
| Wiggles Pet Care Ltd | Wholesale & retail | 2022 |
| Wigley Commercial Services Limited | Administrative & support | 2024 |
| Wigley Contracts (Barby) Limited | Real estate | 2024 |
| Wildcard Boxing Leicester CIC | Arts & recreation | 2025 |
| Wilder International C.I.C. | Professional & scientific | 2025 |
| Wilderness Sports Limited | Arts & recreation | 2024 |
| Wilf the Wicketkeeper Ltd | Professional & scientific | 2024 |
| Wilford Lane Apartments Limited | Construction | 2023 |
| Wilfrid Whittington Limited | Wholesale & retail | 1958 |
| Will a Smith Ltd | Wholesale & retail | 2025 |
| Willett Electrical Services Limited | Construction | 2018 |
| William Colton Limited | Financial services | 2025 |
| William Davis & Co. (Loughborough) Limited | Administrative & support | 1970 |