| Cambridge Tours Ltd | Transport & logistics | 2023 |
| Cambridge Trees Ltd | Administrative & support | 2014 |
| Cambridge Women's AID | Hospitality | 2010 |
| Cambridgeshire Agricultural Limited | Administrative & support | 2006 |
| Cambridgeshire & Peterborough Association of Local Councils Limited | Other services | 2020 |
| Cambridgeshire Accounting Services Limited | Professional & scientific | 2026 |
| Cambridgeshire and Peterborough Business Growth Company Limited | Administrative & support | 2020 |
| Cambridgeshire Boat Services Ltd | Wholesale & retail | 2012 |
| Cambridgeshire Canine Rehabilitation Ltd | Other services | 2023 |
| Cambridgeshire Coaches Ltd | Transport & logistics | 2023 |
| Cambridgeshire County Homes Limited | Construction | 2013 |
| Cambridgeshire Flower Company Limited | Wholesale & retail | 2024 |
| Cambridgeshire Gardens Trust | Arts & recreation | 1997 |
| Cambridgeshire Ghanaians Association Limited | Arts & recreation | 2012 |
| Cambridgeshire Honey Company Ltd | Manufacturing | 2024 |
| Cambridgeshire Motor Centre Ltd | Wholesale & retail | 2021 |
| Cambridgeshire Sand and Gravel Ltd | Transport & logistics | 2003 |
| Cambs Construction Ltd | Construction | 2026 |
| Cambs Electrical Solutions Ltd | Construction | 2021 |
| Cambs Fire Safe Limited | Professional & scientific | 2013 |
| Cambs Light Removals Limited | Transport & logistics | 2019 |
| Cambs Lock Limited | Administrative & support | 2010 |
| Cambs Power Ltd | Construction | 2025 |
| Cambs Renewables Ltd | Construction | 2024 |
| Cambs Windows and Doors Limited | Construction | 2024 |
| Camntech Limited | Manufacturing | 1988 |
| Campbell Buchanan George LLP | | 2009 |
| Campbell Mccrae Limited | Professional & scientific | 2011 |
| Campbell, Melhuish and Buchanan Limited | Construction | 1994 |
| Campervan Solutions Limited | Wholesale & retail | 2025 |
| Camtyne Ltd | Real estate | 2024 |
| Canary Composites Ltd | Construction | 2018 |
| Canham Construction Limited | Construction | 1985 |
| Capella 11 Ltd | Wholesale & retail | 2022 |
| Capernaum Community Trust CIC | Health & social care | 2020 |
| Capriccio Management Ltd | Administrative & support | 2016 |
| Car Nation (Farcet) Ltd | Wholesale & retail | 2022 |
| CARAVANPARTS4U Ltd | Wholesale & retail | 2023 |
| Cardwell Investment Group Ltd | Real estate | 2026 |
| Care and Quality Solutions Ltd | Real estate | 2023 |
| Carepath Ltd | Extraterritorial | 2022 |
| Caresco Limited | Health & social care | 2011 |
| Careway Solutions Ltd | Health & social care | 2026 |
| Carlew Properties Ltd | Households | 2023 |
| Carndu Limited | Professional & scientific | 2012 |
| Caroby Ltd | Manufacturing | 1996 |
| Caroline Gerrard Associates Ltd | Information & communication | 2023 |
| Carp Tours Limited | Administrative & support | 2024 |
| Carrington Park (Silver END) Management Company Limited | Households | 2007 |
| Carrymedeygo Ltd | Transport & logistics | 2022 |
| Carter Crow Limited | Professional & scientific | 2023 |
| Casacode Ltd | Financial services | 2026 |
| Cashel & Carter Realty Ltd | Real estate | 2024 |
| Castle Manor Electrical Services Ltd. | Construction | 2016 |
| Castle Manor Property Services Ltd. | Construction | 2016 |
| Castle Renewables Limited | Energy | 2015 |
| Castor Commercial Property Limited | Real estate | 2015 |
| Cat Cars Ltd | Wholesale & retail | 2024 |
| Catapult Creative Communications Limited | Information & communication | 2006 |
| Catpatrar Trans Ltd | Transport & logistics | 2016 |
| Causeway Advisory Limited | Professional & scientific | 2025 |
| Causton Consulting (Cambridge) Limited | Professional & scientific | 2019 |
| CAW Recruitment Ltd | Administrative & support | 1998 |
| Cawligraphy Ltd | Wholesale & retail | 2019 |
| CC & D Building Ltd | Construction | 2014 |
| CC Fine Art Limited | Wholesale & retail | 2020 |
| CCI Studios Ltd | Professional & scientific | 2025 |
| CCL Supplies Ltd. | Extraterritorial | 1999 |
| Cd&Lh Property Ltd | Real estate | 2021 |
| Cedar Close Fenstanton Ltd | Households | 2017 |
| Cedar Court (Porters Wood) Management Company Limited | Households | 2003 |
| CEG Rent Ltd | Administrative & support | 2014 |
| Cell AG UK Ltd | Professional & scientific | 2023 |
| Cellbond Composites Limited | Manufacturing | 2026 |
| Cellbond Limited | Extraterritorial | 2001 |
| Cemeg Medical Ltd | Professional & scientific | 2025 |
| Cengiz Fast Food Distribution Ltd | Wholesale & retail | 2015 |
| Cenos Group Limited | Financial services | 2026 |
| Cenos Ltd | Transport & logistics | 2021 |
| Centra Data Limited | Information & communication | 2013 |
| Centrado Group Limited | Financial services | 2020 |
| Centrado Investments Limited | Real estate | 2020 |
| Centrado Trading Limited | Manufacturing | 2012 |
| Central Ambulance Training College Ltd | Health & social care | 2009 |
| Centurion Residential Ltd | Real estate | 2024 |
| Ceramic Core Systems Limited | Manufacturing | 1993 |
| Cero Solutions Limited | Information & communication | 2026 |
| Certified Choice CC Ltd | Wholesale & retail | 2023 |
| Ceton Ltd | Manufacturing | 2025 |
| Cezary Chabera Ltd | Wholesale & retail | 2021 |
| CFR Production Ltd | Manufacturing | 2025 |
| CGU Properties Ltd | Real estate | 2020 |
| Chalkbay Services Limited | Construction | 1990 |
| Chalker Consulting Ltd | Information & communication | 2024 |
| Chamberlain Property Services Ltd | Real estate | 2015 |
| Chameledec Ltd | Wholesale & retail | 2016 |
| Chameleon Scrubs Ltd | Extraterritorial | 2019 |
| Chandru Drinks Ltd | Wholesale & retail | 2020 |
| Change BIO Ltd | Professional & scientific | 2023 |
| Chapman Facility Management Limited | Administrative & support | 2026 |