| Whitestone Cleaning Ltd | Administrative & support | 2018 |
| Whitetiger Training Ltd | Arts & recreation | 2010 |
| Whitewood Property Solutions Ltd | Real estate | 2021 |
| Whithington Coffee Limited | Hospitality | 2020 |
| Whitminster Haulage Ltd | Transport & logistics | 2014 |
| Whitney&Laurel Property Management Ltd | Real estate | 2022 |
| Whitsun Systems Limited | Information & communication | 2024 |
| Whittlesey Pharmacy Limited | Health & social care | 2010 |
| Whitwood Transport Ltd | Transport & logistics | 2014 |
| Whizpals Limited | Professional & scientific | 2025 |
| Whizzcreatives Ltd | Professional & scientific | 2025 |
| Whizztech Solutions Ltd | Wholesale & retail | 2026 |
| WHO IAM Consulting Ltd | Information & communication | 2018 |
| Who's WHO Estates Ltd | Real estate | 2015 |
| Who's WHO Limited | Manufacturing | 2004 |
| Wholedrain Limited | Wholesale & retail | 2024 |
| Wholesale Flooring Supplies Limited | Construction | 2015 |
| Wholesale Football Shirts Limited | Wholesale & retail | 2025 |
| Wholesale Lens Company Ltd | Manufacturing | 2025 |
| Wholesale on Wheels Ltd | Wholesale & retail | 2022 |
| Wholesalers Global Limited | Wholesale & retail | 2025 |
| Wholsy Pets Limited | Manufacturing | 2026 |
| WHY Business Consulting Ltd | Professional & scientific | 2020 |
| WHY SO CBD Limited | Manufacturing | 2024 |
| Whyte & Co Properties Ltd | Financial services | 2024 |
| Whyte & Whyte Enterprises Ltd | Transport & logistics | 2018 |
| Whytek Ltd | Construction | 2021 |
| WI International Ltd | Manufacturing | 2017 |
| Wickham Green Holdings Limited | Professional & scientific | 2000 |
| WID Webdevs Limited | Information & communication | 2026 |
| Widcombe Logistics Ltd | Transport & logistics | 2014 |
| Wide Sky Design Limited | Other services | 2011 |
| Wide Thinking Limited | Professional & scientific | 2005 |
| Wieslaw Jozwiak Ltd | Administrative & support | 2018 |
| Wiesy Investments Limited | Financial services | 2020 |
| Wiggledesk Limited | Information & communication | 2021 |
| Wigston Cakes Limited | Wholesale & retail | 2026 |
| Wigston Car Sales Limited | Wholesale & retail | 2007 |
| Wigston Car Wash Ltd | Wholesale & retail | 2026 |
| Wigston Developments Limited | Real estate | 2021 |
| Wigston Estates Ltd | Construction | 2021 |
| Wigston Limited | Real estate | 1980 |
| Wigston Signs and Graphics Limited | Manufacturing | 2015 |
| Wiktory Marketing Ltd | Professional & scientific | 2026 |
| Wilbarston Ltd | Transport & logistics | 2015 |
| Wilcot Haulage Ltd | Transport & logistics | 2014 |
| Wild About Pets Limited Liability Partnership | | 2005 |
| Wild Cat Distribution UK Limited | Wholesale & retail | 2016 |
| Wild Cat Energy Drink Ltd | Manufacturing | 2011 |
| Wild Coffee & Kitchen Limited | Hospitality | 2024 |
| Wild FIG Solutions Limited | Administrative & support | 2014 |
| Wild Flowers Technologies Ltd | Professional & scientific | 2023 |
| Wild Goose Collective Ltd | Wholesale & retail | 2025 |
| Wild Productions Limited | Information & communication | 2000 |
| Wild Technique C.I.C. | Arts & recreation | 2023 |
| Wild Warriors Limited | Arts & recreation | 2019 |
| Wild Wild Travelling Limited | Administrative & support | 2025 |
| Wildcat International Limited | Wholesale & retail | 2015 |
| Wilderness Campers Ltd | Hospitality | 2021 |
| Wildscapes Co-Operative CIC | Administrative & support | 2021 |
| Wileout Ltd | Wholesale & retail | 2014 |
| Wilff Limited | Professional & scientific | 2020 |
| Wilford Withers Property Ltd | Real estate | 2026 |
| Wilkins Pub&Co Ltd | Hospitality | 2024 |
| Wilkinson West Ltd | Wholesale & retail | 2025 |
| Wilkinson Wistow Ltd | Wholesale & retail | 2025 |
| Will & James Properties Ltd | Hospitality | 2019 |
| Will Brothers Ltd | Administrative & support | 2026 |
| Will Cyber Security Consulting Limited | Information & communication | 2019 |
| Willday Property Limited | Real estate | 2024 |
| Willday Wealth Management Limited | Financial services | 2012 |
| Willett Park Homes & Leisure Group Ltd | Hospitality | 2020 |
| Willett Park Homes Group Ltd | Hospitality | 2020 |
| William & Junior Limited | Wholesale & retail | 2024 |
| William Francis Construction Limited | | 1977 |
| William Freer Limited | Manufacturing | 1928 |
| William Grange Ltd | Manufacturing | 2025 |
| William Jacks Limited | Professional & scientific | 1926 |
| William Jacks Properties Limited | Construction | 1973 |
| William Jacks Services Limited | Transport & logistics | 1981 |
| William Johnson Flooring Ltd | Construction | 2024 |
| William Norman Limited | Financial services | 2026 |
| William Stableforth Limited | Health & social care | 2018 |
| William Street Investments Limited | Real estate | 2024 |
| William T Healthcare Ltd | Health & social care | 2020 |
| Williams & Phillips Holdings Ltd | Real estate | 2023 |
| Williams Builders Holdings Limited | Financial services | 2020 |
| Williams Builders Limited | Construction | 1988 |
| Williams Joinery Ltd | Manufacturing | 2016 |
| Williams Lisa Limited | Professional & scientific | 2023 |
| Williams Mews Limited | Real estate | 2017 |
| Williams Orchard Walnut Acre Management Company | Households | 2019 |
| Williamselling Ltd | Wholesale & retail | 2025 |
| Williamson Air Conditioning Limited | Construction | 2025 |
| Willicks Farms LLP | | 2011 |
| Willoughby Gdpr Academy Ltd | Education | 2026 |
| Willow Brook (Belper) Management Company Limited | Households | 2025 |
| Willow Grace Ltd | Wholesale & retail | 2024 |
| Willow Herb Investments Limited | Real estate | 2022 |
| Willow Lakes 001 Limited | Professional & scientific | 2024 |