| CAM Studio Limited | Professional & scientific | 2025 |
| CAM Together UK CIC | Education | 2025 |
| CAM Video Imaging Limited | Extraterritorial | 2023 |
| Cam-Bion Innovations Ltd | Professional & scientific | 2023 |
| Camacre Build Limited | Construction | 2020 |
| Camart Ltd. | Information & communication | 1995 |
| Camb City Construction Ltd | Construction | 2019 |
| Camb City Plumbing & Heating Limited | Construction | 2016 |
| Camb Construction Ltd | Construction | 2016 |
| Camb IT Support Ltd | Information & communication | 2007 |
| Cambair Ltd | Manufacturing | 2020 |
| Cambashi Employees' Trustees Limited | Administrative & support | 2021 |
| Cambashi Limited | Professional & scientific | 1978 |
| Cambconnect Ltd | Transport & logistics | 2021 |
| Cambeam System Design Services Limited | Professional & scientific | 2010 |
| Cambia Design Limited | Professional & scientific | 2026 |
| Cambikes Limited | Wholesale & retail | 2018 |
| Cambimune Limited | Professional & scientific | 2011 |
| Cambio Limited | Professional & scientific | 1985 |
| Cambiologics Limited | Professional & scientific | 2025 |
| Cambiotech Limited | Manufacturing | 2009 |
| Cambium AI Limited | Information & communication | 2025 |
| Cambivac Ltd | Professional & scientific | 2010 |
| Cambourne Aircraft Services Limited | Manufacturing | 2004 |
| Cambourne Autoworx Ltd | Wholesale & retail | 2019 |
| Cambourne Brickwork and Building Limited | Construction | 2026 |
| Cambourne Business Park Limited | Administrative & support | 1998 |
| Cambourne Business Park Management Limited | Professional & scientific | 1999 |
| Cambourne Compliance Ltd | Professional & scientific | 2015 |
| Cambourne Construction Limited | Construction | 2018 |
| Cambourne Global Mart Limited | Wholesale & retail | 2024 |
| Cambourne Grill Ltd | Hospitality | 2026 |
| Cambourne Hindus CIC | Education | 2025 |
| Cambourne Taxis Ltd | Transport & logistics | 2026 |
| Cambourne Vehicle Services (Cambridge) Limited | Wholesale & retail | 2011 |
| Cambox Limited | Other services | 2023 |
| Cambpro Ltd | Construction | 2023 |
| Cambrane Limited | Water & waste | 2025 |
| Cambrian Culture Limited | Wholesale & retail | 2025 |
| Cambridge & Country Limited | Construction | 2025 |
| Cambridge & District Citizens Advice Bureau | Information & communication | 1996 |
| Cambridge & ELY Child Contact Centres Limited | Health & social care | 2011 |
| Cambridge & Huntingdon Airport Travel Service Ltd | Transport & logistics | 2021 |
| Cambridge '99 Club Limited | Arts & recreation | 1980 |
| Cambridge 105 FM Radio Limited | Information & communication | 2010 |
| Cambridge 22 Newmarket RD Ltd | Households | 2024 |
| Cambridge 360 Ltd | Professional & scientific | 2017 |
| Cambridge Academia Ltd | Real estate | 2023 |
| Cambridge Academic Ltd | Information & communication | 1991 |
| Cambridge Academy for Professional Training Ltd | Education | 2016 |
| Cambridge Academy of English Limited | Extraterritorial | 2020 |
| Cambridge Academy of Risk Management Limited | Education | 2024 |
| Cambridge Academy of Translation UK | Information & communication | 2015 |
| Cambridge Academy of Transport Limited | Education | 1985 |
| Cambridge Accommodation Limited | Real estate | 2002 |
| Cambridge Accommodation Stay Ltd | Hospitality | 2025 |
| Cambridge Acorn Project | Health & social care | 2014 |
| Cambridge Acoustic Laboratory Limited | Professional & scientific | 2018 |
| Cambridge Acoustic Sciences Limited | Professional & scientific | 2020 |
| Cambridge Acoustics Limited | Professional & scientific | 2012 |
| Cambridge Adaptive Testing Ltd | Professional & scientific | 2024 |
| Cambridge Adhd Centre LLP | | 2023 |
| Cambridge Advanced Materials and Technologies Limited | Professional & scientific | 2016 |
| Cambridge Advanced Power Electronics Limited | Professional & scientific | 2011 |
| Cambridge Advanced Research Alliance | Professional & scientific | 2018 |
| Cambridge Advantage Ltd | Professional & scientific | 2019 |
| Cambridge Advisory Limited | Professional & scientific | 2015 |
| Cambridge Advisory Partners Limited | Real estate | 2017 |
| Cambridge Aerial Works Ltd | Professional & scientific | 2018 |
| Cambridge Aero Club Limited(The) | Transport & logistics | 1948 |
| Cambridge Aero Consultants Limited | Transport & logistics | 2021 |
| Cambridge Aeroacoustics Limited | Professional & scientific | 2012 |
| Cambridge Aerothermal Limited | Professional & scientific | 2014 |
| Cambridge Aesthetic & Laser Academy Limited | Education | 2021 |
| Cambridge Aesthetics and Dental Hygiene Limited | Health & social care | 2024 |
| Cambridge African Network (CAN) | Other services | 2010 |
| Cambridge Agency Group Ltd | Information & communication | 2025 |
| Cambridge Agile Technology Ltd | Information & communication | 2019 |
| Cambridge Agritech Capital Limited | Financial services | 2019 |
| Cambridge Agritech Limited | Professional & scientific | 2015 |
| Cambridge Ahead | Other services | 2012 |
| Cambridge AI Hub Ltd | Other services | 2025 |
| Cambridge AI Labs Ltd | Education | 2017 |
| Cambridge AI+ Limited | Information & communication | 2018 |
| Cambridge Aircon Limited | Energy | 2024 |
| Cambridge Alarms Ltd | Administrative & support | 2018 |
| Cambridge Alliance Ltd. | Hospitality | 2010 |
| Cambridge Alumni and Student Polo Club Ltd | Extraterritorial | 2014 |
| Cambridge Anaesthesia Specialist Services LLP | | 2024 |
| Cambridge and Country Financial Limited | Financial services | 2024 |
| Cambridge and County Developments Limited | Construction | 2018 |
| Cambridge and Newmarket Polo Club Ltd | Arts & recreation | 2022 |
| Cambridge Android Ltd | Arts & recreation | 2017 |
| Cambridge Animal Health Ltd | Professional & scientific | 2013 |
| Cambridge Animal Technologies Ltd | Information & communication | 2016 |
| Cambridge Antibody Technology Group Limited | Professional & scientific | 1996 |
| Cambridge Apartments Ltd | Professional & scientific | 2025 |
| Cambridge App LAB Limited | Extraterritorial | 2022 |
| Cambridge Applied Innovation Limited | Professional & scientific | 2016 |
| Cambridge Applied Research Ltd | Professional & scientific | 2014 |