| C&N Consulting Services Ltd | Administrative & support | 2024 |
| C&R SPV 1 Ltd | Real estate | 2020 |
| C&S Groundworks Limited | Construction | 2015 |
| C&S Property LLP | | 2019 |
| C. Horrell Limited | Agriculture & fishing | 1998 |
| C.A.L.M. Business Developments Limited | Professional & scientific | 2004 |
| C.A.L.M. Group Holdings Limited | Financial services | 2023 |
| C.A.L.M. Retail Accounting Limited | Professional & scientific | 2023 |
| C.B.S. (Power Tools) Limited | Wholesale & retail | 1960 |
| C.B.Tool Engineers (Cambridge) Limited | Manufacturing | 1962 |
| C.E.L Lead & Hard Metals Limited | Wholesale & retail | 2020 |
| C.F. Gill& SON Limited | Water & waste | 1962 |
| C.Itoi Limited | Information & communication | 2005 |
| C.John Norris(Cars & Caravans)Limited | Wholesale & retail | 1939 |
| C.O.C Cleaning Limited | Administrative & support | 2026 |
| C.R.Design&Build Limited | Construction | 2017 |
| C.W. Magical Transport Ltd | Transport & logistics | 2025 |
| C17 Property Managment Ltd | Households | 2026 |
| C1C One Ltd | Real estate | 2014 |
| C2AZ Consulting Ltd | Professional & scientific | 2023 |
| C30 Developments Ltd. | Real estate | 2016 |
| C7TH Limited | Manufacturing | 2008 |
| CAB Care Hire Limited | Administrative & support | 2006 |
| Cabe Properties Ltd | Real estate | 2020 |
| Caben Group Ltd | Administrative & support | 2024 |
| Cable Solutions GB Limited | Construction | 1999 |
| Cable Wind Ltd | Construction | 2018 |
| Cableformycar Ltd | Construction | 2020 |
| Cabsense Ltd. | Transport & logistics | 2012 |
| CAC Purpose of Victory House | Other services | 2025 |
| Cactus Property Asset Management Ltd | Real estate | 2026 |
| CAD Perfect Solutions Limited | Administrative & support | 2012 |
| Cadebrook Limited | Construction | 1992 |
| Caesar Strategy Ltd | Health & social care | 2019 |
| Cafe Culture Ltd | Professional & scientific | 2009 |
| Cafe Mills Ltd | Hospitality | 2022 |
| Cafe Plus Fakenham Ltd | Hospitality | 2024 |
| Cafe Sumiri Ltd | Hospitality | 2025 |
| Caffer Consulting Ltd | Information & communication | 2026 |
| Caffer Properties Ltd | Real estate | 2022 |
| Café YU Ltd | Hospitality | 2019 |
| Caiga Properties Limited | Real estate | 2026 |
| Cairnshaw Limited | Information & communication | 2026 |
| CAK Foods Ltd | Hospitality | 2019 |
| Cakes & Toppers Ltd | Administrative & support | 2019 |
| Cakes and Bakes Peterborough Ltd | Hospitality | 2024 |
| Cakezone Ltd | Wholesale & retail | 2024 |
| Calaho Creative Ltd | Professional & scientific | 2024 |
| Calarasi Trans Ltd | Transport & logistics | 2018 |
| Calarasi Transport Limited | Transport & logistics | 2018 |
| Caliber Sales Limited | Wholesale & retail | 2024 |
| Calibre Coaching Academy Ltd | Education | 2024 |
| Calicut Caffe Ltd | Hospitality | 2025 |
| Calidum Marketing Ltd | Professional & scientific | 2022 |
| Calivans Ltd | Hospitality | 2020 |
| Call on US Limited | Professional & scientific | 2013 |
| Calmababy Limited | Arts & recreation | 2010 |
| Calnan Enterprises Limited | Other services | 2017 |
| Calshot Close Residents Company Limited | Households | 1999 |
| Calton Hill Property Limited | Real estate | 2021 |
| Calumea 78 Ltd | Transport & logistics | 2026 |
| Camari Ltd | Manufacturing | 2008 |
| Camb-Lec Ltd | Manufacturing | 2023 |
| Cambium Research Limited | Information & communication | 2011 |
| Cambium UK LLP | | 2008 |
| Cambivo Limited | Wholesale & retail | 2017 |
| Cambridge Academy of Arts and Sciences Ltd | Education | 2021 |
| Cambridge Biopower Limited | Energy | 2018 |
| Cambridge Biotech Ltd | Professional & scientific | 2019 |
| Cambridge Corporate Gifts Limited | Extraterritorial | 2014 |
| Cambridge Crescent Residents Company Limited | Households | 1998 |
| Cambridge Dynamics Limited | Manufacturing | 1978 |
| Cambridge Emperical Services Limited | Manufacturing | 2019 |
| Cambridge Fruit Company Ltd | Wholesale & retail | 2009 |
| Cambridge Medical Aesthetics/ Cambridge Biotech Ltd. | Health & social care | 2007 |
| Cambridge NFU Members Company Limited | Real estate | 2011 |
| Cambridge PCB Group Limited | Wholesale & retail | 2016 |
| Cambridge Real Estate Limited | Real estate | 2003 |
| Cambridge Safety Limited Liability Partnership | | 2002 |
| Cambridge Strength Limited | Arts & recreation | 2024 |
| Cambridge Systems Consulting Ltd | Professional & scientific | 2025 |
| Cambridge Tutoring Hub Ltd | Education | 2025 |
| Cambridge Vending Solutions Limited | Wholesale & retail | 2022 |
| Cambridge West Holdings Ltd | Real estate | 2020 |
| Cambridge West Ventures Ltd | Real estate | 2020 |
| Cambridgeshire Car World Limited | Wholesale & retail | 2023 |
| Cambridgeshire Carpets Ltd | Wholesale & retail | 2024 |
| Cambridgeshire Coffee Services Ltd | Hospitality | 2017 |
| Cambridgeshire Guardians Ltd | Professional & scientific | 2025 |
| Cambridgeshire Haulage Ltd | Transport & logistics | 2024 |
| Cambridgeshire Housing Capital PLC | Real estate | 2014 |
| Cambridgeshire Land Cullum Farm Ltd | Extraterritorial | 2022 |
| Cambridgeshire Mechanical Services Limited | Construction | 2022 |
| Cambridgeshire Motor House Ltd | Wholesale & retail | 2016 |
| Cambridgeshire Plumbing and Tiling Ltd | Construction | 2019 |
| Cambridgeshire Roofing and Building Services Limited | Construction | 2025 |
| Cambridgeshire Sugarcraft Supplies Limited | Wholesale & retail | 2012 |
| Cambridgeshire Wellness Clinic Peterborough Limited | Other services | 2020 |
| Cambridgeshireland (Fenstanton) Ltd | Construction | 2020 |
| Cambridgeshireland (Offord) Ltd | Construction | 2020 |