| West’S Property Group Ltd | Real estate | 2024 |
| WG Consult Ltd | Professional & scientific | 2024 |
| WG Properties (Northants) LLP | | 2024 |
| WG Property (Northants) Ltd | Real estate | 2024 |
| What School Ltd | Information & communication | 2026 |
| Whatprice Limited | Information & communication | 2025 |
| Wheelie Klips Limited | Manufacturing | 2016 |
| Wheelwrights Ashford Limited | Extraterritorial | 2026 |
| When Care Comes First Limited | Health & social care | 2025 |
| Whiskey-Mike Consulting Ltd | Education | 2015 |
| Whispers Grooming Ltd | Professional & scientific | 2020 |
| Whitco Catering and Bakery Equipment Limited | Manufacturing | 1995 |
| Whitco Properties & Investments Limited | Financial services | 2018 |
| White Space Abodes Ltd | Financial services | 2021 |
| White Utilities Limited | Construction | 2002 |
| White Willow Landscapes Ltd | Administrative & support | 2022 |
| White Winter Consulting Ltd | Information & communication | 2025 |
| White's Garages (Higham Ferrers) Limited | Professional & scientific | 1965 |
| Whitehart Construction Ltd | Construction | 2022 |
| Whitehorses RC Ltd | Hospitality | 2022 |
| Whiton Leasing Ltd | Households | 2025 |
| Whyidworks CIC | Education | 2026 |
| Wicked Desserts Ltd | Hospitality | 2023 |
| Wickstead Leisure Limited | Extraterritorial | 1995 |
| Wickstead Playground Equipment Limited | Extraterritorial | 1995 |
| Wicksteed Charitable Trust | Arts & recreation | 2010 |
| Wicksteed Leisure Limited | Manufacturing | 1958 |
| Wicksteed Limited | Professional & scientific | 1988 |
| Wicksteed Playground Equipment Limited | Extraterritorial | 1979 |
| Wicksteed Trading Limited | Hospitality | 2020 |
| Wicksteed Village Limited | Households | 2021 |
| Wilder Properties Limited | Real estate | 2016 |
| Wildman Court Development BA Limited | Construction | 2018 |
| William Falshaw Limited | Professional & scientific | 2019 |
| William Metford Limited | Real estate | 2004 |
| Williams Foods UK Ltd | Hospitality | 2022 |
| Williamsfield Residents Company Limited | Extraterritorial | 2011 |
| Williamson Fix-It ALL Ltd | Manufacturing | 2024 |
| Willmore Electrical Limited | Construction | 2017 |
| Willow Connect Holdings Ltd | Financial services | 2023 |
| Willow Construction Solutions Ltd | Construction | 2026 |
| Willow Electrical Installations Ltd | Construction | 2010 |
| Willow Family Services Ltd | Health & social care | 2024 |
| Willow Gardens Road Limited | Professional & scientific | 2015 |
| Willow Gardner Limited | Financial services | 2023 |
| Willow Homes Property Ltd | Real estate | 2024 |
| Willow Shopfitting Limited | Construction | 1998 |
| Willow Tree Early Years Limited | Health & social care | 2024 |
| Willow Tree Flooring Ltd | Manufacturing | 2024 |
| Willowbrook (Education) Limited | Manufacturing | 2001 |
| Willowbrook Building & Refurbishments Limited | Wholesale & retail | 2007 |
| Willowbrook Equine Limited | Agriculture & fishing | 1999 |
| Willows Property Partnership Limited | Real estate | 2017 |
| Wills Consultants Limited | Administrative & support | 2014 |
| Wills Fire Limited | Construction | 2023 |
| Willshift Plant Limited | Other services | 2006 |
| Wilsic Properties Limited | Real estate | 2017 |
| Wilson Browne Law Limited | Professional & scientific | 2014 |
| Wilson Browne Lawyers Limited | Extraterritorial | 2008 |
| Wilson Browne Legal Services | Extraterritorial | 1987 |
| Wilson Browne LLP | | 2009 |
| Wilson Browne Professional Services Limited | Professional & scientific | 1987 |
| Wilson Browne Trust Corporation Limited | Professional & scientific | 2012 |
| Wilson's Independent Locksmiths Ltd | Extraterritorial | 2021 |
| Windmill Stores Group Ltd | Wholesale & retail | 2021 |
| Window Masters Ltd | Construction | 2023 |
| Windowmaster Control Systems Limited | Construction | 1999 |
| Windows and Doors Ltd | Construction | 2025 |
| Wine Chateau Ltd | Wholesale & retail | 2021 |
| Wing Chun Online Ltd | Arts & recreation | 2012 |
| Winners C K Ltd | Wholesale & retail | 2023 |
| Winning ROW Ltd | Wholesale & retail | 2024 |
| Winton Pathways Ltd | Health & social care | 2025 |
| Winzone Consulting Limited | Professional & scientific | 2018 |
| Wiser IT Limited | Administrative & support | 2022 |
| With Intention Ltd | Other services | 2023 |
| Wittering West Limited | Construction | 2009 |
| Wizzgold Limited | Transport & logistics | 2023 |
| Wjmartin Plumbing & Heating Limited | Construction | 2025 |
| Wkwtsw Ltd | Wholesale & retail | 2022 |
| Wolf.D.S Ltd | Transport & logistics | 2021 |
| Wolfskin Limited | Information & communication | 2017 |
| Wolverton Mill Ltd | Real estate | 2021 |
| Woodcraft World Limited | Manufacturing | 2022 |
| Wooden Boards UK Ltd | Manufacturing | 2026 |
| Wooder and Thomas Ltd | Education | 2023 |
| Woodford Cafe Co Ltd | Hospitality | 2025 |
| Woodford Car Sales Ltd | Wholesale & retail | 2024 |
| Woodford House Estates Limited | Agriculture & fishing | 1996 |
| Woodhead and Co Sales and Lettings Limited | Real estate | 2018 |
| Woodhouses Park 2020 Ltd | Real estate | 2020 |
| Woodster Property Ltd | Real estate | 2025 |
| Woodys Dubz Shack Ltd | Wholesale & retail | 2024 |
| Woodys Trading Ltd | Wholesale & retail | 2026 |
| Woof WAG CIC | Other services | 2025 |
| Wooffitt Ltd | Transport & logistics | 2024 |
| Wooster Interiors Ltd | Wholesale & retail | 2013 |
| Work Pro ML Ltd | Other services | 2016 |
| Work Shacks Limited | Construction | 2007 |
| Workforce Bathrooms & Tiling Ltd | Construction | 2025 |