| Bright Capital Real Estate Limited | Real estate | 2024 |
| Bright Lights Publishing Ltd | Information & communication | 2019 |
| Brightheld Ltd | Professional & scientific | 2021 |
| Brightnorix Corporation Limited | Wholesale & retail | 2026 |
| Briwe Limited | Professional & scientific | 2019 |
| Brook House Hub Limited | Real estate | 2020 |
| Brooker Piling Solutions Limited | Manufacturing | 2006 |
| Brookside Court Properties Ltd | Real estate | 2018 |
| Brown & Primrose Ltd | Health & social care | 2023 |
| Bryan Lecoche Limited | Professional & scientific | 2012 |
| Bryce Bennett Communications Limited | Professional & scientific | 2007 |
| BS Furniture Ltd | Wholesale & retail | 2018 |
| Buchenhorst Ltd | Health & social care | 2021 |
| Buckden Botanicals Ltd | Other services | 2025 |
| Buckden Farm Markets Ltd | Agriculture & fishing | 2022 |
| Buckden Marina Community Limited | Construction | 2025 |
| Budha House Ltd | Real estate | 2022 |
| Buggybaby Limited | Wholesale & retail | 2017 |
| Bunn Roofing Limited | Construction | 1999 |
| Bunny Love Productions Limited | Information & communication | 2021 |
| Burrstone Properties Limited | Real estate | 2021 |
| Business Improvement Strategies Limited | Professional & scientific | 2008 |
| Busy Bubbles Club Ltd | Education | 2026 |
| Butterwhips Ltd | Wholesale & retail | 2017 |
| Bwae-Solution Ltd | Administrative & support | 2021 |
| BY Cinos Kitchen Limited | Hospitality | 2025 |
| C & a Plumbing & Heating Services Ltd | Construction | 2024 |
| C & J Transmissions Limited | Wholesale & retail | 2002 |
| C & W General Building Ltd | Construction | 2014 |
| C B Prime Limited | Arts & recreation | 1964 |
| C D Specialist Vehicle Services Ltd | Professional & scientific | 2025 |
| C J Davies Welding Ltd | Construction | 2015 |
| C Mason Services Ltd | Information & communication | 2025 |
| C Page Design Ltd | Professional & scientific | 2021 |
| C Usher Refrigeration Services Ltd | Manufacturing | 2023 |
| C-Star Business Services Limited | Professional & scientific | 2013 |
| C. R. Pearce Flooring Limited | Construction | 2011 |
| C.H Plumbing Ltd | Construction | 2020 |
| Camb Build Ltd | Construction | 2014 |
| Cambechem Limited | Professional & scientific | 2016 |
| Cambfix Plumbing & Heating Ltd | Construction | 2022 |
| Cambridge Automation Limited | Wholesale & retail | 2011 |
| Cambridge CAD Group Limited | Professional & scientific | 2016 |
| Cambridge Canopies Ltd. | Administrative & support | 2022 |
| Cambridge Connected Limited | Real estate | 2025 |
| Cambridge Cyber Security Ltd | Administrative & support | 2022 |
| Cambridge Doors Ltd | Manufacturing | 2025 |
| Cambridge Global Macro Capital Limited | Financial services | 2025 |
| Cambridge Growth Clinic Limited | Professional & scientific | 2024 |
| Cambridge Kinetics Ltd | Information & communication | 2021 |
| Cambridge Medical Limited | Administrative & support | 1994 |
| Cambridge New West Education & Technology Ltd. | Hospitality | 2018 |
| Cambridge Site Labour Ltd | Construction | 2026 |
| Cambridge Software Limited | Administrative & support | 2022 |
| Cambridge Support EOT Ltd | Other services | 2024 |
| Cambridge Transport & Recovery Limited | Transport & logistics | 2025 |
| Cambridge Travel Company Ltd | Administrative & support | 2020 |
| Cambridgeshire Cricket Limited | Arts & recreation | 2011 |
| Cambridgeshire Land (Sawtry) Ltd | Extraterritorial | 2015 |
| Cambridgeshire Schools Cricket Association Ltd | Arts & recreation | 2020 |
| Cambridgeshire Sports Physio and Back Care Limited | Health & social care | 2003 |
| Cambridgeshire Wellbeing Clinics Ltd | Other services | 2014 |
| Cambridgestyle Canopies Ltd. | Construction | 2010 |
| Cambtech Services Ltd | Professional & scientific | 2023 |
| Cam’S Carpets Ltd | Construction | 2024 |
| Canopy R&D Limited | Professional & scientific | 2025 |
| Capital UP Ltd | Information & communication | 2021 |
| Capturebee Ltd | Professional & scientific | 2025 |
| Carbon Ibank Limited | Financial services | 2023 |
| Carrington Place Brampton Limited | Other services | 2003 |
| Carrino Property Ltd | Real estate | 2021 |
| Cars Sitting Still Ltd | Information & communication | 2025 |
| Carter & Associates Limited | Professional & scientific | 1999 |
| Cash 4 Shares Limited | Financial services | 2023 |
| Castel Investment Limited | Real estate | 1996 |
| Castle Muerau Ltd | Extraterritorial | 2020 |
| Catelu Ltd | Transport & logistics | 2018 |
| Catercare Consulting Ltd | Hospitality | 2025 |
| Catering Vans Ltd | Manufacturing | 2019 |
| Caxton Ventures Limited | Professional & scientific | 2015 |
| CBJ Designs Limited | Real estate | 2025 |
| CDC Restoration Ltd | Construction | 2008 |
| CEG Constructions & Home Improvements Ltd | Construction | 2024 |
| Centre Stage Live Limited | Professional & scientific | 2021 |
| Centurion Developments (St.Neots) Limited | Construction | 2015 |
| Ceto Engineering Holdings Ltd | Financial services | 2023 |
| Chaii Events Ltd | Hospitality | 2024 |
| Chair View Ltd | Professional & scientific | 2025 |
| Chamberlain & Sutton Ltd | Construction | 2022 |
| Champion Cleaning Professionals Limited | Administrative & support | 2020 |
| Chapel Mews (ST. Neots) Management Company Limited | Professional & scientific | 1988 |
| Chapel Road Property Limited | Real estate | 2025 |
| Chapman Kitchens and Bathrooms Limited | Construction | 2021 |
| Charlene Gisele Ltd | Other services | 2020 |
| Charoite Jade Publishing Limited | Professional & scientific | 2026 |
| Charoon Engineering Limited | Other services | 2011 |
| Chartwell Health Limited | Professional & scientific | 2017 |
| Chears International Ltd | Real estate | 2021 |
| Chechacen Limited | Administrative & support | 2016 |
| Checkavehicle Limited | Information & communication | 2022 |