| Cambridge Centre for Elite Education Limited | Education | 2025 |
| Cambridge Centre for Evidence-Based Policing Ltd | Professional & scientific | 2013 |
| Cambridge Centre for Landscape and People | Administrative & support | 2006 |
| Cambridge Centre for Palestine Studies Ltd | Professional & scientific | 2015 |
| Cambridge Centre for Psychotherapy & Training Ltd | Health & social care | 2023 |
| Cambridge Challenge Ltd | Professional & scientific | 2024 |
| Cambridge Chamber of Commerce Limited | Professional & scientific | 2005 |
| Cambridge Champagne Company Limited | Wholesale & retail | 2017 |
| Cambridge Change Management Limited | Professional & scientific | 2014 |
| Cambridge Charcuterie Ltd | Hospitality | 2024 |
| Cambridge Chauffeur Punts Limited | Administrative & support | 2007 |
| Cambridge Chem&Bio Ltd | Professional & scientific | 2023 |
| Cambridge Cherry Limited | Hospitality | 2018 |
| Cambridge Chest Clinic Limited | Health & social care | 2025 |
| Cambridge Chest Ltd | Health & social care | 2019 |
| Cambridge Chesterton Indoor Bowling Club Limited | Arts & recreation | 1996 |
| Cambridge China Hire Limited | Administrative & support | 2018 |
| Cambridge Chiropody and Podiatry Limited | Health & social care | 2006 |
| Cambridge Choral Ltd | Education | 2020 |
| Cambridge Chronicles Limited | Manufacturing | 2024 |
| Cambridge Chutian Education and Cultural Exchange Centre Ltd | Wholesale & retail | 2023 |
| Cambridge Circuit (Holdings) Limited | Professional & scientific | 2014 |
| Cambridge Circuit Company Limited | Manufacturing | 1986 |
| Cambridge City 4 Primary Care Network Ltd | Health & social care | 2022 |
| Cambridge City Cabs Ltd | Transport & logistics | 2026 |
| Cambridge City Football Club Limited | Arts & recreation | 1973 |
| Cambridge City Hockey Club Limited | Arts & recreation | 2018 |
| Cambridge City Housing Company Limited | Real estate | 2016 |
| Cambridge City Junior Hockey Club Limited | Arts & recreation | 2020 |
| Cambridge City Licensed Taxis Limited | Transport & logistics | 2009 |
| Cambridge City Maintenance Ltd | Construction | 2015 |
| Cambridge City Master Manco Limited | Real estate | 2025 |
| Cambridge City Opera Ltd | Arts & recreation | 2012 |
| Cambridge City PCN Ltd | Health & social care | 2026 |
| Cambridge City Storage Ltd | Real estate | 2022 |
| Cambridge Civil Mediation Limited | Professional & scientific | 2004 |
| Cambridge Classic Stays Ltd | Administrative & support | 2023 |
| Cambridge Classics Limited | Construction | 2012 |
| Cambridge Classserver LLP | | 2014 |
| Cambridge Clean Heat Ltd | Construction | 2025 |
| Cambridge Clean Sheets Limited | Other services | 2013 |
| Cambridge Cleantech Limited | Other services | 2002 |
| Cambridge Clearance & Removals Ltd | Transport & logistics | 2025 |
| Cambridge Climate Ltd | Professional & scientific | 2024 |
| Cambridge Climate Solutions Ltd | Construction | 2025 |
| Cambridge Clinical Insights Ltd | Professional & scientific | 2023 |
| Cambridge Clinical Ltd. | Health & social care | 2024 |
| Cambridge Clinical Psychology Services Limited | Health & social care | 2013 |
| Cambridge Clinical Solutions Limited | Professional & scientific | 2015 |
| Cambridge Clocks Ltd | Manufacturing | 2016 |
| Cambridge Cloud Solutions Limited | Information & communication | 2023 |
| Cambridge Club Holdings Limited | Hospitality | 2010 |
| Cambridge Code Studio Limited | Information & communication | 2016 |
| Cambridge Cognition Holdings PLC | Financial services | 2012 |
| Cambridge Cognition Limited | Information & communication | 2001 |
| Cambridge Cognition Trustees Limited | Professional & scientific | 2001 |
| Cambridge Cohousing Limited | Real estate | 2013 |
| Cambridge Collections Ltd | Professional & scientific | 2026 |
| Cambridge Colleges Funding II PLC | Financial services | 2013 |
| Cambridge Colleges Funding PLC | Financial services | 2013 |
| Cambridge Colleges Superannuation Trustees Limited | Administrative & support | 1978 |
| Cambridge Colours Painting & Decorating Services Ltd | Construction | 2026 |
| Cambridge Community Arts | Education | 2014 |
| Cambridge Complementary Healthcare Ltd | Wholesale & retail | 2006 |
| Cambridge Compliance Explicatio Limited | Professional & scientific | 2017 |
| Cambridge Computational Psychometrics Ltd | Information & communication | 2022 |
| Cambridge Compute Company Limited | Information & communication | 2025 |
| Cambridge Computer C2S Ltd | Professional & scientific | 2023 |
| Cambridge Computer Recycling Limited | Information & communication | 2013 |
| Cambridge Computer Service Limited | Wholesale & retail | 2024 |
| Cambridge Computing and Design Services Limited | Information & communication | 2025 |
| Cambridge Connect Transit Limited | Transport & logistics | 2015 |
| Cambridge Connectors International Limited | Professional & scientific | 1991 |
| Cambridge Connectors Limited | Financial services | 1983 |
| Cambridge Conservation Solutions Limited | Professional & scientific | 2017 |
| Cambridge Construction Consultants Ltd | Real estate | 2012 |
| Cambridge Construction Supplies Ltd | Wholesale & retail | 2023 |
| Cambridge Consultants Limited | Professional & scientific | 1971 |
| Cambridge Consulting Laboratory Limited | Professional & scientific | 2010 |
| Cambridge Contemporary Art Limited | Wholesale & retail | 2005 |
| Cambridge Contour Clinic Ltd | Manufacturing | 2017 |
| Cambridge Cookery School Ltd | Hospitality | 2009 |
| Cambridge Corner Ltd | Wholesale & retail | 2024 |
| Cambridge Cornerstone Limited | Construction | 2024 |
| Cambridge Corporate Consultants Limited | Financial services | 1977 |
| Cambridge Corporate Restructuring Ltd | Professional & scientific | 2020 |
| Cambridge Corporate Services Ltd | Professional & scientific | 2023 |
| Cambridge Cosmetic Clinic Ltd | Other services | 2021 |
| Cambridge Cosmetics & Aesthetics Limited | Other services | 2018 |
| Cambridge Council for Voluntary Service | Health & social care | 1999 |
| Cambridge Counselling Service Ltd | Health & social care | 2017 |
| Cambridge Country Cottages Limited | Real estate | 2016 |
| Cambridge Crafted Kitchens & Interiors Ltd | Manufacturing | 2017 |
| Cambridge Create and Renovate Ltd | Construction | 2023 |
| Cambridge Creative Education Centre Ltd | Information & communication | 2018 |
| Cambridge Critical Care Education Ltd | Education | 2023 |
| Cambridge Cryogenics Limited | Professional & scientific | 2013 |
| Cambridge Cryptographic Ltd | Professional & scientific | 2018 |
| Cambridge Curiosity and Imagination | Arts & recreation | 2007 |
| Cambridge Cyber Advisers Limited | Information & communication | 2017 |