| Whowasi Ltd | Information & communication | 2026 |
| WIC Developments Limited | Construction | 2007 |
| Wifindatasolutions Ltd | Information & communication | 2026 |
| Wilbees Ltd | Wholesale & retail | 2023 |
| Wild Boys Productions Ltd | Arts & recreation | 2024 |
| Wild FEN Media Ltd | Information & communication | 2023 |
| Wiles Haulage Limited | Transport & logistics | 2017 |
| Wiles Plastering Limited | Construction | 2022 |
| Willow 42 Ltd | Real estate | 2022 |
| Willow Academy Limited | Other services | 2020 |
| Willow Academy Machines Limited | Wholesale & retail | 2023 |
| Willow Academy Training Limited | Other services | 2023 |
| Willow Tree Huts Ltd | Hospitality | 2025 |
| Willowcroft Aggregates DIY Ltd | Wholesale & retail | 2025 |
| Willowcroft Aggregates Ltd | Mining & quarrying | 2018 |
| Willowcroft Fish Farm and Fisheries Ltd | Agriculture & fishing | 2025 |
| Willowcroft Fisheries and Fishermens Village Leisure Park Limited | Hospitality | 2018 |
| Willowstone Homes Ltd | Construction | 2025 |
| Willowtree Homecare Limited | Health & social care | 2023 |
| Wilry Group Limited | Real estate | 2017 |
| Wisbech & March Bramley Line Ltd | Other services | 2004 |
| Wisbech and Fenland Museum Trustee Company Limited | Extraterritorial | 2015 |
| Wisbech Area Regeneration and Development Trust | Administrative & support | 2005 |
| Wisbech Barbers Ltd | Other services | 2024 |
| Wisbech Business Networking Limited | Other services | 2025 |
| Wisbech Car Breakers Ltd | Wholesale & retail | 2024 |
| Wisbech Community Hub CIC | Education | 2021 |
| Wisbech Construction Limited | Construction | 2017 |
| Wisbech Contract Farming Ltd | Agriculture & fishing | 2003 |
| Wisbech Educational Foundation | Professional & scientific | 2001 |
| Wisbech Electrical Holdings Limited | Financial services | 2018 |
| Wisbech Engineering Limited | Manufacturing | 2003 |
| Wisbech Exports Limited | Wholesale & retail | 2018 |
| Wisbech Funeral Service Limited | Other services | 2013 |
| Wisbech Grammar School Ltd | Education | 2018 |
| Wisbech Hand Car Wash Ltd | Administrative & support | 2021 |
| Wisbech Haulage Ltd | Transport & logistics | 2025 |
| Wisbech Holdings Limited | Real estate | 2020 |
| Wisbech Home Property Ltd | Real estate | 2024 |
| Wisbech Marco Ltd | Real estate | 2022 |
| Wisbech Market (UK) Ltd | Wholesale & retail | 2019 |
| Wisbech MOT Testing Centre Ltd | Wholesale & retail | 2013 |
| Wisbech Park Cafe Ltd | Hospitality | 2025 |
| Wisbech Payroll Limited | Professional & scientific | 2011 |
| Wisbech Plant Company Limited | Agriculture & fishing | 1946 |
| Wisbech Projects CIC | Education | 2016 |
| Wisbech Social Club and Institute | Real estate | 2011 |
| Wisbech Society & Preservation Trust Limited(The) | Professional & scientific | 1939 |
| Wisbech ST Mary Sports and Community Centre Limited | Arts & recreation | 2009 |
| Wisbech Town Football Club Limited | Arts & recreation | 1935 |
| Wisbech Tyres Ltd | Wholesale & retail | 2024 |
| Wisbech Wellness Centre Ltd | Health & social care | 2018 |
| WKW Properties Ltd | Real estate | 2024 |
| WMS Recruitment Limited | Administrative & support | 2003 |
| Woadmans Developments Ltd | Construction | 2024 |
| Women's Football Industry Limited | Arts & recreation | 2024 |
| Woodgett Holdings Ltd | Professional & scientific | 2024 |
| Woodhouse Farm Close Residents Management Company Limited | Households | 2022 |
| Woodman's Restaurant Limited | Hospitality | 2024 |
| Woods Family Estates Ltd | Real estate | 2023 |
| Woolcroft Equine Services Limited | Other services | 2004 |
| Woolner Developers Ltd | Construction | 2018 |
| Woolner Freight Limited | Transport & logistics | 2003 |
| Worldwide Granite Ltd | Manufacturing | 2025 |
| Worldwide Medical Ltd | Information & communication | 2008 |
| Worldwide Sales Ltd | Wholesale & retail | 2007 |
| Worms Service Maritime (UK) Ltd | Transport & logistics | 2025 |
| Wors Pizza Limited | Hospitality | 2025 |
| Worzals Bar & Grill Ltd | Wholesale & retail | 2014 |
| Worzals Ltd | Wholesale & retail | 2014 |
| Wrightway Interiors Limited | Construction | 2014 |
| Writeresults Ltd | Professional & scientific | 2023 |
| WSP Construction Limited | Construction | 2024 |
| WSP Plastering Limited | Construction | 2022 |
| WSP Services Limited | Transport & logistics | 2024 |
| Wweb Limited | Construction | 2015 |
| Wyatt Builders Limited | Construction | 2002 |
| X4PE Ltd | Information & communication | 2016 |
| Xenobit LLP | | 2013 |
| XMR Construction Limited | Construction | 2024 |
| Y.H. Handyman Services & Property Maintenance Ltd | Construction | 2025 |
| Yango Satellite Communications Limited | Information & communication | 2012 |
| Yeeha Fire Protection and Maintenance Services Ltd | Construction | 2026 |
| Yellow Shop D S Ltd | Wholesale & retail | 2023 |
| Yoco Group Limited | Wholesale & retail | 2026 |
| Z K Construction Group Ltd | Construction | 2023 |
| ZARA01 Ltd | Wholesale & retail | 2019 |
| ZARA11 Ltd | Construction | 2018 |
| Zaras Management Ltd | Wholesale & retail | 2023 |
| Zebe Limited | Extraterritorial | 2014 |
| Zero Harm Healthcare Limited | Professional & scientific | 2013 |
| Zero Harm Hospital Limited | Professional & scientific | 2013 |
| Zeus Solar Ltd | Construction | 2021 |
| ZIG ZAG Running Ltd | Arts & recreation | 2020 |
| Zilli Group Limited | Financial services | 2020 |
| Zilli Ltd | Manufacturing | 2019 |
| Zilli Vibro Limited | Manufacturing | 2025 |
| ZJB Engineering Ltd | Professional & scientific | 2019 |
| ZN Property Management Ltd | Real estate | 2026 |
| ZR Transport Ltd | Transport & logistics | 2017 |