| Waterbeach Tillage Hall | Real estate | 2012 |
| Waterfall Property Company Limited | Real estate | 2022 |
| Watergull Orchards Limited | Manufacturing | 2021 |
| Waterhouse Cambridge Limited | Households | 2017 |
| Waterhouse Freehold Limited | Households | 2023 |
| Waterland Organics Ltd | Agriculture & fishing | 2014 |
| Watermill Accounting Limited | Professional & scientific | 2009 |
| Waterscope Limited | Professional & scientific | 2015 |
| Waterside Living Management Company Limited | Households | 2018 |
| Waterside Lodges Cambridge Limited | Hospitality | 2018 |
| Waterside Residential Limited | Households | 2018 |
| Watersolar Limited | Professional & scientific | 2014 |
| Watling Court (Elstree) Management Company Limited | Households | 1984 |
| Watson House Management Company Limited | Households | 2013 |
| Watt Knowledge Ltd | Professional & scientific | 2015 |
| Wavanta Advisory Ltd | Information & communication | 2026 |
| Wave - Wellness Aesthetic Vascular Excellence Limited | Health & social care | 2026 |
| Wave Connect Technologies Ltd | Professional & scientific | 2026 |
| Wave Photonics Ltd | Professional & scientific | 2021 |
| Wave Upholstery Ltd | Manufacturing | 2025 |
| Waveforge Design Automation Ltd | Information & communication | 2026 |
| Waveform Electrical Services Ltd | Construction | 2022 |
| Wavelength Charity Limited | Health & social care | 1958 |
| Waverley Technology Limited | Real estate | 2004 |
| Wayfinding Consultants Ltd | Professional & scientific | 2002 |
| Waymakers Cambridge CIC | Education | 2025 |
| Waytor Limited | Other services | 1998 |
| WD Online Services Ltd | Wholesale & retail | 2023 |
| WDR Construction Limited | Construction | 2024 |
| WE ARE Ambition Ltd | Administrative & support | 2024 |
| WE ARE Cambridge Ltd | Administrative & support | 2025 |
| WE ARE MW Limited | Professional & scientific | 2024 |
| WE ARE People Ltd | Administrative & support | 2026 |
| WE ARE Sound Ltd | Arts & recreation | 2016 |
| WE ARE Strategists Ltd | Professional & scientific | 2024 |
| WE ARE Unforgettable Limited | Information & communication | 2021 |
| WE Care & Maintain Ltd | Manufacturing | 2024 |
| WE Care Domestic Ltd | Construction | 2025 |
| WE DO Stories Ltd | Information & communication | 2014 |
| WE Fill ANY Cushion Ltd | Other services | 2021 |
| WE for Animals CIC | Health & social care | 2024 |
| WE Love Fresh Ltd | Manufacturing | 2022 |
| WE Rent Flats Ltd | Real estate | 2023 |
| WE Thrive Together Limited | Other services | 2022 |
| Wealthmappr Ltd | Information & communication | 2025 |
| Wealthy Steps Financial Planning Ltd | Financial services | 2024 |
| Wearcomp Ltd | Administrative & support | 2012 |
| Weaveaa Private Limited | Wholesale & retail | 2026 |
| Weaver Creature Ltd | Professional & scientific | 2026 |
| Weaver Global Wellbeing Ltd | Health & social care | 2025 |
| Weaver Technical Ltd | Professional & scientific | 2022 |
| Webay Holdings Ltd | Financial services | 2024 |
| Webb Investments Ltd. | Real estate | 1947 |
| Webber. Ltd | Information & communication | 2020 |
| Weblogix Consultancy Services Ltd | Information & communication | 2020 |
| Websters Cambridge Limited | Professional & scientific | 2016 |
| Websters Group Holdings Limited | Professional & scientific | 2016 |
| Websters Private Client Limited | Extraterritorial | 2023 |
| Websters Tax UK Limited | Financial services | 2008 |
| Websters Trustees Limited | Information & communication | 2018 |
| Webtuna Software Limited | Information & communication | 2013 |
| Webuy 1ST Ltd | Real estate | 2025 |
| Webwise Consultants Limited | Information & communication | 2025 |
| Wedd Close Limited | Households | 2019 |
| Wedd Settlement Farming Company Limited | Agriculture & fishing | 2023 |
| Wedgewood Drive Management Company Limited | Households | 1991 |
| Weesg Group Ltd | Other services | 2022 |
| Wegter Family of Brands Limited | Wholesale & retail | 2022 |
| WEH Medical Ltd | Health & social care | 2022 |
| Weilaiyilaiuk Ltd | Administrative & support | 2024 |
| Weir Associates Ltd | Professional & scientific | 2013 |
| Weir Cottage Close Management Limited | Professional & scientific | 2014 |
| Weir Machine Ltd | Extraterritorial | 2018 |
| Weird & Wonderful Antiques Ltd | Wholesale & retail | 2020 |
| Weird Games Ltd | Manufacturing | 2022 |
| Weizarde Industrial (UK) Mining Co., Ltd | Mining & quarrying | 2024 |
| WEL (NO 1) Ltd | Real estate | 2011 |
| Welch Group Garages Ltd. | Wholesale & retail | 1941 |
| Welch's Group Holdings Limited | Transport & logistics | 1981 |
| Welch's Transport Limited | Transport & logistics | 1938 |
| Welchs (Crane Hire) Limited | Administrative & support | 1946 |
| Welchs Crescent (Flats) Management Ltd | Households | 2021 |
| Welcome Inn Residence & Suites Ltd | Wholesale & retail | 2018 |
| Weldartia Ltd | Wholesale & retail | 2025 |
| Weldcc Ltd | Manufacturing | 2022 |
| Welding Alloys Partnership LLP | | 2016 |
| Welding Institute(The) | Professional & scientific | 1946 |
| Wellbeing Freedom Ltd | Manufacturing | 2008 |
| Wellbeingon CIC | Professional & scientific | 2023 |
| Wellcome Genome Campus Development Limited | Real estate | 2022 |
| Wellcome Genome Campus Leisure Limited | Real estate | 2025 |
| Wellcome Genome Campus Residential Limited | Real estate | 2025 |
| Wellesley Villas Limited | Households | 2013 |
| Wellington Court (Cambridge) Limited | Real estate | 1986 |
| Wellmax Tire Co Ltd | Extraterritorial | 2021 |
| Wellness Pro Ltd | Wholesale & retail | 2023 |
| Wello Denspa Ltd | Health & social care | 2022 |
| Wello Denspa UK Ltd | Financial services | 2025 |
| Welmark Biosolutions Limited | Information & communication | 2013 |
| Welney Farms Property Limited | Real estate | 1999 |