| Wills & Reynolds Limited | Manufacturing | 2002 |
| Wills Commercial Ltd | Real estate | 2018 |
| Wills Financial Ltd | Other services | 2026 |
| Wills Residential Limited | Real estate | 2019 |
| Willson Group Limited | Real estate | 2018 |
| Wilmer Place Ltd | Construction | 2015 |
| Wilmor Construction Limited | Construction | 2000 |
| Wilson and Holliman Properties Limited | Real estate | 2020 |
| Wilson Catching Services Limited | Agriculture & fishing | 2010 |
| Wilson Investments (2506) Ltd | Professional & scientific | 2024 |
| Wilson Pipework Services Ltd | Manufacturing | 2024 |
| Wilson Prime Ltd | Real estate | 2025 |
| Wilson Procon Ltd | Real estate | 2016 |
| Wilson Slight Estates Limited | Real estate | 2026 |
| Wilson Slight Holdings Limited | Financial services | 2026 |
| Wilson Slight Investments Limited | Real estate | 2026 |
| Wilson Utilities Ltd | Construction | 2020 |
| Wimiziel Property Ltd | Real estate | 2020 |
| Wimpey Fortune Ltd | Real estate | 2022 |
| WIN Removals Ltd | Transport & logistics | 2019 |
| Winchilsea Estates Ltd | Construction | 2014 |
| Winchmore Hill Plumbing Supplies Limited | Wholesale & retail | 1993 |
| Windham Services Ltd | Professional & scientific | 2018 |
| Winding UP Ltd | Construction | 2024 |
| Windjammer Group Holdings (UK) Limited | Financial services | 2023 |
| Windjammer Shipco 1 UK Limited | Manufacturing | 2026 |
| Windmill Montessori Nursery School Ltd | Health & social care | 2012 |
| Window Design & Installations Limited | Construction | 2022 |
| Window Design and Construct Limited | Construction | 2004 |
| Window Point Limited | Construction | 2013 |
| Window Replacer Clean Ltd | Manufacturing | 2025 |
| Windowscomun Limited | Transport & logistics | 2024 |
| Windscreen Specialist Ltd | Wholesale & retail | 2025 |
| Windsor Commercial Limited | Construction | 2008 |
| Windward-Ho Limited | Professional & scientific | 2017 |
| Winemanor Holdings Limited | Extraterritorial | 1985 |
| Wing Investment Company Limited | Financial services | 2024 |
| Wing-A-Ding Ltd | Hospitality | 2021 |
| Wingate Private Day Nursery Limited | Health & social care | 2003 |
| Wings 101 Ltd | Hospitality | 2023 |
| Wings 101 Northampton Ltd | Hospitality | 2025 |
| Wings Events Ltd | Administrative & support | 2006 |
| Wings Telecom Ltd | Information & communication | 2023 |
| Wingsit Ltd | Hospitality | 2025 |
| WINGSTA77 Ltd | Hospitality | 2026 |
| Winkless Holding Limited | Other services | 2025 |
| Winnersh Dental Practice Ltd | Health & social care | 2009 |
| Winnington Remedial Services Limited | Construction | 2022 |
| Winston Close Management Co. Limited | Real estate | 1989 |
| Winston Holdings Limited | Information & communication | 2016 |
| Winston Property Management Limited | Real estate | 2024 |
| Winter Express Ltd | Transport & logistics | 2022 |
| Winter Property and Development Limited | Real estate | 2022 |
| Winter Sunshine Limited | Wholesale & retail | 2024 |
| Winterburn Builders Ltd | Construction | 2018 |
| Winterfields Property Limited | Real estate | 2014 |
| Winterstoke Capital Ltd | Professional & scientific | 2020 |
| Wintheme Projects Limited | Extraterritorial | 2000 |
| Wintle Heating and Plumbing Holdings Limited | Financial services | 2003 |
| Wintle Heating and Plumbing Limited | Construction | 1966 |
| Wintle Property Limited | Real estate | 2003 |
| Winton Residential Ltd | Hospitality | 2019 |
| Winton Villa RTM Company Ltd | Households | 2024 |
| Winup Limited | Arts & recreation | 2026 |
| Winurture Childcare Ltd | Health & social care | 2021 |
| Winver Brickwork Ltd | Construction | 2019 |
| Winvic Build Limited | Construction | 2008 |
| Winvic Energy Limited | Construction | 2025 |
| Winvic Finance Limited | Financial services | 2018 |
| Winvic Group Limited | Manufacturing | 2006 |
| Winworx Ltd | Construction | 2023 |
| Winzee Ltd | Wholesale & retail | 2014 |
| Wire & Build Ltd | Construction | 2025 |
| Wire Wheels Webbers Limited | Information & communication | 2015 |
| WIRE25 Ltd | Manufacturing | 2024 |
| Wisdom & Friends Limited | Hospitality | 2022 |
| Wisdom Solutions Ltd. | Professional & scientific | 2018 |
| Wise Bloodstock Ltd | Arts & recreation | 2024 |
| Wise Build Ltd | Construction | 2025 |
| Wise Lion Limited | Other services | 2022 |
| Wise Parking Ltd | Administrative & support | 2021 |
| Wisegrey Ltd | Professional & scientific | 2020 |
| Wiseworks INT Ltd | Construction | 2025 |
| Wish Vendor Ltd | Wholesale & retail | 2025 |
| Wisp Holdings Limited | Arts & recreation | 2016 |
| Wispere Ltd | Professional & scientific | 2025 |
| Wisptidal Architektonics Limited | Information & communication | 2024 |
| Wisupport Ltd | Health & social care | 2018 |
| Witczak Ltd | Transport & logistics | 2016 |
| Witczakdrive Ltd | Transport & logistics | 2026 |
| With-Integrity Ltd | Professional & scientific | 2024 |
| Witty Group Limited | Real estate | 2019 |
| Witty Northampton Limited | Real estate | 2011 |
| Witty, Pask & Buckingham Ltd. | Health & social care | 2002 |
| WIZ Services Ltd | Real estate | 2024 |
| Wizztrans Ltd | Transport & logistics | 2019 |
| WJH Demand Ltd | Professional & scientific | 2024 |
| WJM Cooling Ltd | Construction | 2023 |
| WJM Courier Services Ltd | Transport & logistics | 2020 |
| WJM Social Care Ltd | Hospitality | 2021 |