| Welwyn JV1 Ltd | Construction | 2019 |
| Wembley House Cambridge Limited | Real estate | 2025 |
| Wembley Park Drive Management Limited | Households | 1982 |
| Weme IMP and EXP Co., Limited | Manufacturing | 2022 |
| WEN Zhou Basch Technology Limited | Manufacturing | 2026 |
| Wenzhou Zhonggao Industry Co., Ltd | Extraterritorial | 2023 |
| Wenzhou Zinger Sanitary Wares Co., Ltd | Extraterritorial | 2015 |
| Wephoto Technology Limited | Wholesale & retail | 2026 |
| Wesley Court (Cambridge) Management Company Limited | Households | 2008 |
| Wesley House, Cambridge | Education | 2014 |
| Wesolowski Ltd | Manufacturing | 2025 |
| Wessex Court Estate Management Company Limited | Households | 2010 |
| Wessex Court Flat Management Company Limited | Real estate | 2010 |
| West 1954 Limited | Extraterritorial | 2013 |
| West Barns Design Ltd | Administrative & support | 2010 |
| West Cambridge Anaesthetists Group Limited | Health & social care | 2021 |
| West Cambs Federation CIC | Health & social care | 2016 |
| West Edges Ltd | Wholesale & retail | 2025 |
| West Hill Park Tennis Club Limited | Real estate | 1964 |
| West India Quay (Freehold) Ltd | Financial services | 2004 |
| West India Quay (Warehouse Property) Limited | Households | 1999 |
| West Landscapes Limited | Administrative & support | 2025 |
| West Midlands Examinations Board(The) | Education | 1979 |
| West Suffolk Swimming Club Ltd | Other services | 2005 |
| Wester Iron Limited | Manufacturing | 2023 |
| Westerman Composites Ltd | Manufacturing | 2018 |
| Western Universe Limited | Real estate | 2019 |
| Westfield Place Management Company Limited | Households | 2006 |
| Westley & Huff (Cambridge) Limited | Professional & scientific | 2015 |
| Westlodge Kennels & Cattery Limited | Agriculture & fishing | 2010 |
| Westminster College Trading Ltd | Hospitality | 2014 |
| Weston Development Management Limited | Households | 2021 |
| Weston James Golf Ltd | Manufacturing | 2025 |
| Westray Aircraft Maintenance Ltd | Manufacturing | 2022 |
| Westray Capital Management LLP | | 2014 |
| Westray Capital Services Limited | Financial services | 2014 |
| Westridge Property Consultants Ltd | Real estate | 2006 |
| Westwick Portfolio Limited | Real estate | 2023 |
| Westwood (Phase V) Management Company Limited | Households | 1996 |
| Wetscherad Ltd | Health & social care | 2022 |
| Wetzl Construction Ltd | Construction | 2021 |
| Wevo Group Limited | Information & communication | 2021 |
| Wewe Technology Co., Ltd | Wholesale & retail | 2025 |
| Wexford Education Limited | Education | 2025 |
| WF (Cambridge) Limited | Education | 2012 |
| WG Property Management Ltd | Real estate | 2024 |
| WH ACD Co., Limited | Wholesale & retail | 2025 |
| WH Residences Limited | Professional & scientific | 2019 |
| Whack Limited | Construction | 2026 |
| What a Juss Ltd | Wholesale & retail | 2025 |
| What Willy Cook Ltd | Hospitality | 2020 |
| Whateverware Limited | Information & communication | 2002 |
| Whatfix Limited | Information & communication | 2019 |
| Wheelie Fresh Bins Ltd | Water & waste | 2007 |
| Whelepu Electric Appliance Ltd | Manufacturing | 2021 |
| When Doves CRY Ltd | Arts & recreation | 2020 |
| Where the Wildlings ARE Ltd | Arts & recreation | 2022 |
| Whippet Coaches Limited | Transport & logistics | 1953 |
| Whirl Education Ltd | Administrative & support | 2026 |
| Whiskbo Breckenridge Company Limited | Extraterritorial | 2016 |
| Whiskers on the Wolds Ltd | Hospitality | 2025 |
| Whisper Games Limited | Wholesale & retail | 2023 |
| Whitburn Road 1971 Limited | Extraterritorial | 2014 |
| White Acre (Sawston) Management Company Limited | Households | 2023 |
| White Bear Construction Limited | Extraterritorial | 2018 |
| White Duck Developments Limited | Real estate | 2016 |
| White Horse Park Limited | Hospitality | 2016 |
| White Media Productions Ltd | Information & communication | 2024 |
| White Park Homes Group Limited | Financial services | 2020 |
| White Ravn Ltd | Transport & logistics | 2025 |
| White Roofing Services Limited | Construction | 2004 |
| White Scar Ventures Ltd | Real estate | 2017 |
| White Swan QUY Ltd | Hospitality | 2015 |
| White Tank Limited | Hospitality | 2014 |
| Whitefield Law Ltd | Professional & scientific | 2021 |
| Whitegrove Pharma Development Limited | Professional & scientific | 2013 |
| Whitehalling Ltd | Financial services | 2020 |
| Whitehill Management Company (Cambridge) Limited | Real estate | 1992 |
| Whitehorse Road Tyres Limited | Wholesale & retail | 2018 |
| WHITEHORSE24 Ltd | Hospitality | 2025 |
| Whitehouse Masonry Ltd | Construction | 2005 |
| Whiter Dental Limited | Health & social care | 2013 |
| Whiter Shores Limited | Information & communication | 2007 |
| Whiterock Partners Limited | Construction | 2018 |
| Whiterod Residential Ltd | Households | 2020 |
| Whiteunicorn Foundation | Extraterritorial | 2022 |
| Whitfield Finance Limited | Financial services | 2015 |
| Whitfield Portfolio Group Limited | Financial services | 2018 |
| Whitfield Portfolio Holdings Limited | Financial services | 2018 |
| Whitfield Portfolio Limited | Real estate | 2017 |
| Whitfield Property Investments Limited | Real estate | 2018 |
| Whitlam Aviation Ltd | Manufacturing | 2022 |
| Whitney Property Limited | Hospitality | 2016 |
| Whittle Dene Developments Ltd | Construction | 2017 |
| Whittlesey Green Management Company Limited | Households | 2015 |
| Whittlesford Retail Ltd | Wholesale & retail | 2024 |
| WHL PUB Ltd | Hospitality | 2019 |
| Whyts Acre Management Company Ltd | Real estate | 2015 |
| Wi-Ai Technology Limited | Information & communication | 2019 |
| Wicked Brick Ltd | Manufacturing | 2017 |