| Cambridge Approaches Limited | Other services | 2021 |
| Cambridge Architectural Research Limited | Professional & scientific | 1986 |
| Cambridge Art & Design Centre Ltd | Administrative & support | 2019 |
| Cambridge Art Insurance Limited | Financial services | 2009 |
| Cambridge Art Salon | Arts & recreation | 2011 |
| Cambridge Arts & Sciences Limited | Education | 1997 |
| Cambridge Arts (84 Charing Cross Road) Ltd | Arts & recreation | 2016 |
| Cambridge Arts Theatre (Pressure) Limited | Arts & recreation | 2018 |
| Cambridge Arts Theatre Panto Limited | Arts & recreation | 2015 |
| Cambridge Asia Connect Limited | Wholesale & retail | 1998 |
| Cambridge Asparagus Ltd | Agriculture & fishing | 2016 |
| Cambridge Assessment | Education | 2004 |
| Cambridge Assessment Overseas Limited | Education | 2007 |
| Cambridge Asset Holdings Limited | Real estate | 2023 |
| Cambridge Associates in Management Limited | Professional & scientific | 2024 |
| Cambridge Atomworks (2024) Limited | Professional & scientific | 2024 |
| Cambridge Atomworks LLP | | 2023 |
| Cambridge Audio Technology Limited | Wholesale & retail | 2018 |
| Cambridge Audio-Visual Ltd | Wholesale & retail | 2003 |
| Cambridge Auto Trade Limited | Wholesale & retail | 2020 |
| Cambridge Automation & Robotics Ltd | Information & communication | 2012 |
| Cambridge Automotive Ltd | Wholesale & retail | 2025 |
| Cambridge Avenue Limited | Construction | 2018 |
| Cambridge Badminton Limited | Wholesale & retail | 2018 |
| Cambridge Bakers Ltd | Manufacturing | 2019 |
| Cambridge Bakery Ltd | Hospitality | 2018 |
| Cambridge Banana Leaf Ltd | Hospitality | 2015 |
| Cambridge Bangla Academy Ltd | Education | 2024 |
| Cambridge Banquet Ltd | Arts & recreation | 2025 |
| Cambridge Basket Ltd | Wholesale & retail | 2025 |
| Cambridge Bast Limited | Professional & scientific | 2024 |
| Cambridge Battery Research Limited | Other services | 2017 |
| Cambridge Beauty LAB Ltd | Other services | 2023 |
| Cambridge BEE Ltd | Wholesale & retail | 2020 |
| Cambridge Bell Tents and Tipis Ltd | Administrative & support | 2023 |
| Cambridge Beverage Technologies Limited | Professional & scientific | 2021 |
| Cambridge BID Limited | Other services | 2012 |
| Cambridge Bike Tours Ltd | Administrative & support | 2010 |
| Cambridge Bioanalytics Ltd | Professional & scientific | 2026 |
| Cambridge Biocapital Ltd | Professional & scientific | 2023 |
| Cambridge Bioconsultants Limited | Professional & scientific | 1996 |
| Cambridge Bioinformatics Ltd | Information & communication | 2011 |
| Cambridge Biomagnetics Limited | Professional & scientific | 2008 |
| Cambridge Biomedical Campus Ltd | Professional & scientific | 2021 |
| Cambridge Biomedical Security Ltd | Administrative & support | 2026 |
| Cambridge Biopharmaceutical Consultants Limited | Professional & scientific | 2020 |
| Cambridge Bioscience Limited | Wholesale & retail | 2002 |
| Cambridge Bioscience Research (UK) Co., Ltd | Wholesale & retail | 2025 |
| Cambridge Bistro Limited | Hospitality | 2008 |
| Cambridge Blue Ltd | Health & social care | 2005 |
| Cambridge Blue Plumbing & Heating Ltd | Construction | 2021 |
| Cambridge Bookkeeping Services Ltd | Professional & scientific | 2022 |
| Cambridge Bootcamps Ltd | Arts & recreation | 2022 |
| Cambridge Brainoid Ltd | Information & communication | 2022 |
| Cambridge Breast Surgery Limited | Health & social care | 2017 |
| Cambridge Bridge Holdings Ltd | Real estate | 2026 |
| Cambridge Broadband Networks Group Limited | Information & communication | 2016 |
| Cambridge Brow Sanctuary Ltd | Other services | 2024 |
| Cambridge Buffet Company Fulbourn Limited | Hospitality | 2026 |
| Cambridge Buffet Company Limited | Hospitality | 2020 |
| Cambridge Building Development & Maintenance Company Limited | Construction | 2017 |
| Cambridge Building Group Ltd | Construction | 2025 |
| Cambridge Building Services (UK) Ltd | Construction | 2014 |
| Cambridge Building Support Ltd | Other services | 2025 |
| Cambridge Bulgarian Community Ltd | Education | 2022 |
| Cambridge Burger Trading Ltd | Hospitality | 2019 |
| Cambridge Business Academy Ltd | Public administration | 2023 |
| Cambridge Business Partners Ltd | Administrative & support | 2016 |
| Cambridge Business School Limited(The) | Education | 1980 |
| Cambridge Business Solutions Limited | Professional & scientific | 2012 |
| Cambridge CAD Ltd | Professional & scientific | 2014 |
| Cambridge CAD Services Ltd | Information & communication | 2016 |
| Cambridge Cafe Ltd | Hospitality | 2025 |
| Cambridge Cakes Ltd | Manufacturing | 2025 |
| Cambridge Camerata Academy Limited | Education | 2024 |
| Cambridge Cangaroos Trampoline Club Limited | Arts & recreation | 2019 |
| Cambridge Canine Cuts Ltd | Agriculture & fishing | 2025 |
| Cambridge Canoe Club | Arts & recreation | 2021 |
| Cambridge Capital Limited | Other services | 2015 |
| Cambridge Capital Management Partners Limited | Administrative & support | 2010 |
| Cambridge Capital Management UK LLP | | 2010 |
| Cambridge Car and Van Rental Limited | Administrative & support | 2015 |
| Cambridge Car Club Limited | Arts & recreation | 1979 |
| Cambridge Car Recovery Limited | Transport & logistics | 2025 |
| Cambridge Car Tech Ltd | Wholesale & retail | 2021 |
| Cambridge Carbon Footprint Ltd | Other services | 2006 |
| Cambridge Card Company Ltd | Manufacturing | 2013 |
| Cambridge Cardiac Limited | Professional & scientific | 2025 |
| Cambridge Cardiac Surgery Limited | Health & social care | 2017 |
| Cambridge Cardiomatrix Ltd | Professional & scientific | 2026 |
| Cambridge Care Solutions Ltd | Health & social care | 2023 |
| Cambridge Carpentry and Joinery Ltd | Construction | 2022 |
| Cambridge Cartridges Limited | Wholesale & retail | 2025 |
| Cambridge Castle Apartments Limited | Real estate | 2020 |
| Cambridge Cat Veterinary Clinic Limited | Professional & scientific | 2018 |
| Cambridge Ceilidhs Limited | Administrative & support | 2025 |
| Cambridge Center for Education Exchange Ltd | Education | 2018 |
| Cambridge Center for International Communication Services Limited | Administrative & support | 2018 |
| Cambridge Central Estates Limited | Real estate | 2022 |
| Cambridge Centre for Attachment Limited | Professional & scientific | 2012 |