| Weldon Contracts Limited | Manufacturing | 2004 |
| Wellington Panto Hire Ltd | Administrative & support | 2015 |
| Wellness Within Services Limited | Other services | 2024 |
| Wellow House School Limited | Education | 1971 |
| Wells Plastering Ltd | Construction | 2022 |
| Wendgreen Limited | Real estate | 1973 |
| Wendy Wheldon Consultancy and Training Limited | Administrative & support | 2017 |
| Wesley Marine Windows Limited | Manufacturing | 2006 |
| West Fade Limited | Hospitality | 2025 |
| West Smethwick Park Limited | Real estate | 2024 |
| West Stockwith Yacht Club Limited | Arts & recreation | 1982 |
| Westbury House Management Limited | Real estate | 1999 |
| Westend Supermarket Limited | Wholesale & retail | 2020 |
| Weston Farming Limited | Agriculture & fishing | 2010 |
| Weston Management Limited | Households | 2023 |
| Weston Mill Farming Company | Agriculture & fishing | 1984 |
| Westrose Securities | Financial services | 1974 |
| Westwood Notts Limited | Real estate | 2023 |
| WF Coleman & SON Limited | Wholesale & retail | 2003 |
| Wharf Parkes Limited | Real estate | 2026 |
| Whate Electrical Services Limited | Construction | 2022 |
| Where Embers Echo Ltd | Manufacturing | 2025 |
| Whirly Girl Limited | Transport & logistics | 2017 |
| Whisk & Shine Ltd | Construction | 2026 |
| Whistlers (Newark) Limited | Wholesale & retail | 2008 |
| Whitbread Restoration Limited | Construction | 2015 |
| White Knight Solutions Limited | Information & communication | 2016 |
| White Post Farm Centre Limited | Arts & recreation | 2003 |
| White Property Portfolio Ltd | Real estate | 2024 |
| White Swan Dunham Limited | Hospitality | 2024 |
| Whitehartretford Limited | Hospitality | 2012 |
| Whitetone Limited | Real estate | 1995 |
| Whittakers Bar and Restaurant Limited | Hospitality | 2013 |
| Whittleford Grove 1963 Limited | Extraterritorial | 2014 |
| Whizzbyt Ltd | Information & communication | 2023 |
| Whole Lotta Love Ltd | Hospitality | 2021 |
| Wholemeal Systems Ltd | Information & communication | 2010 |
| Wildlife Veterinary Foundation Ltd | Professional & scientific | 2022 |
| Wildlife Veterinary Services Ltd | Professional & scientific | 2016 |
| Wildpyre Limited | Manufacturing | 2021 |
| Will Orton Motorsport Limited | Arts & recreation | 2020 |
| Willfield Services Ltd | Professional & scientific | 2026 |
| Willmore Consultants Ltd | Professional & scientific | 2021 |
| Willow Court Maintenance Management Limited | Households | 2024 |
| Willow Holt Consult Ltd | Professional & scientific | 2025 |
| Willow Tree Therapy Limited | Health & social care | 2026 |
| Willowbank Contracts Limited | Construction | 2010 |
| Willshar Construction Services Limited | Construction | 1989 |
| Willsons Printers (Newark) Limited | Manufacturing | 1963 |
| Willsons Printers (Nottingham) Limited | Extraterritorial | 1972 |
| Wilson Energy Ltd | Wholesale & retail | 2007 |
| Wilsonwood Ltd | Construction | 2014 |
| Winston Rowe Recruitment Ltd | Professional & scientific | 2025 |
| Winter Dogs Ltd | Other services | 2021 |
| Winterburn Fine Art Limited | Arts & recreation | 2012 |
| Winters Web Limited | Information & communication | 2012 |
| Winthorpe Hall Limited | Professional & scientific | 2010 |
| Winthorpe PUB Ltd | Hospitality | 2026 |
| Wirebird Holdings Limited | Extraterritorial | 2008 |
| Wireless Broadband Services Limited | Extraterritorial | 2003 |
| Wirtgen Limited | Manufacturing | 1995 |
| Wisteria Consultancy Services Limited | Professional & scientific | 2015 |
| Witham Grange Glamping Limited | Hospitality | 2021 |
| Witham Lodge Management Company Limited | Households | 2002 |
| Wiverton Developments Ltd | Construction | 2025 |
| Wizard Coating and Refinishing Ltd | Construction | 2025 |
| Wjrb OIL Services Ltd | Transport & logistics | 2013 |
| WJS Property Maintenance Ltd | Households | 2022 |
| WM Abattoir Service Limited | Manufacturing | 2019 |
| WM Saunders Partnership LLP | | 2004 |
| Wmsf Projects LLP | | 2025 |
| Womack & Co Ltd | Professional & scientific | 2024 |
| Wonderfulness of Life Limited | Other services | 2018 |
| Wood Moore & Co Ltd | Real estate | 2011 |
| Woodland Lettings Ltd | Households | 2023 |
| Woodland Spinney Management Company Ltd | Households | 2023 |
| Woodlands Homes (UK) Limited | Construction | 2008 |
| Woodthorpe Harrison Limited | Real estate | 1959 |
| World Freight Company (UK) Limited | Administrative & support | 2005 |
| World of Envelopes Limited | Professional & scientific | 2004 |
| World of Flavours Takeaway Ltd | Hospitality | 2024 |
| World Street Fusions Ltd | Hospitality | 2026 |
| World Tree Community Ltd | Other services | 2024 |
| Worldsource.Org.Uk Limited | Administrative & support | 2000 |
| Worthington Aviation Consultants Ltd | Transport & logistics | 2020 |
| Wrap This Way Ltd | Hospitality | 2020 |
| Wrates Bagley Limited | Professional & scientific | 2013 |
| Wrates Scholastic Photographs Limited | Professional & scientific | 1955 |
| Wrigleprint Personalised Merchandise Limited | Manufacturing | 2014 |
| WS Tech-Eng Ltd | Professional & scientific | 2024 |
| WSP Enterprises LLP | | 2006 |
| WSP Property Developments LLP | | 2006 |
| WSP Safety Holdings Limited | Financial services | 2026 |
| WSP Safety Ltd. | Administrative & support | 1989 |
| WV Direct Limited | Wholesale & retail | 2023 |
| Wwdd Ltd | Wholesale & retail | 2018 |
| Wyvern Designs Ltd | Arts & recreation | 2025 |
| X 2 Connect Limited | Information & communication | 2003 |
| X Languages Ltd | Education | 2023 |
| X R & D Boatbuilders Limited | Manufacturing | 2016 |