| C&G Resin Specialists Ltd | Extraterritorial | 2024 |
| C. D. Hood Ltd | Construction | 2003 |
| C. King Electrical Services Limited | Construction | 2019 |
| C.D. Bush Roofing Limited | Construction | 2022 |
| C.J. Murfitt Limited | Construction | 1985 |
| C.N. Starling Limited | Agriculture & fishing | 1954 |
| Cabcab Ltd | Wholesale & retail | 2020 |
| CAD Visuals 3D Limited | Professional & scientific | 2015 |
| Cadarn-Qr Ltd | Professional & scientific | 2019 |
| Caedevirum Properties Limited | Real estate | 1963 |
| Caffia Properties Limited | Real estate | 2015 |
| Cage Trans Ltd | Transport & logistics | 2021 |
| Caipira Brazilian Flavours Ltd | Manufacturing | 2017 |
| Cait Lisle Designs Ltd | Professional & scientific | 2019 |
| Cake Supplies on Sale UK Ltd | Hospitality | 2016 |
| Calibrant Ltd | Other services | 2019 |
| CAM Alarms Limited | Construction | 2002 |
| CAM Construction Management Ltd | Financial services | 2003 |
| CAM Design Studio Ltd | Professional & scientific | 2019 |
| CAM Highways Limited | Construction | 2018 |
| Cam's Dog Club Ltd | Other services | 2023 |
| Camaltt Ltd | Professional & scientific | 2023 |
| Cambac C.I.C. | Administrative & support | 2015 |
| Cambridge Academic Performance Ltd | Health & social care | 2015 |
| Cambridge Airconditioning Limited | Construction | 2020 |
| Cambridge and Anglia Ruskin Student Radio Limited | Information & communication | 2009 |
| Cambridge Architectural Design Limited | Professional & scientific | 2015 |
| Cambridge Asphalt Ltd | Construction | 2012 |
| Cambridge Builders Ltd | Construction | 2020 |
| Cambridge Cabins Ltd | Construction | 2023 |
| Cambridge Camerata Limited | Arts & recreation | 2008 |
| Cambridge Car Solutions Limited | Wholesale & retail | 2020 |
| Cambridge Commodities Holdings Limited | Financial services | 2017 |
| Cambridge Commodities Limited | Wholesale & retail | 1998 |
| Cambridge Construction Group Ltd | Construction | 2024 |
| Cambridge Cornerstone Properties Limited | Real estate | 2026 |
| Cambridge Environmental Asbestos Services Limited | Professional & scientific | 2018 |
| Cambridge Flat Roofing Company Limited | Construction | 2008 |
| Cambridge Flat Roofing Holdings Limited | Financial services | 2015 |
| Cambridge Floor Sanding Limited | Construction | 2017 |
| Cambridge Food and Wine Limited | Wholesale & retail | 2017 |
| Cambridge Handyman Service Ltd | Administrative & support | 2020 |
| Cambridge HEN Ltd | Arts & recreation | 2025 |
| Cambridge Hot TUB Hire Limited | Administrative & support | 2020 |
| Cambridge Imagination Ltd | Professional & scientific | 2022 |
| Cambridge Innovation Parks Limited | Real estate | 2018 |
| Cambridge Installers Ltd | Construction | 2023 |
| Cambridge Intl Recruitment Ltd | Administrative & support | 2014 |
| Cambridge IPO Limited | Professional & scientific | 2000 |
| Cambridge Life Sciences Limited | Manufacturing | 2003 |
| Cambridge Marketing Limited | Professional & scientific | 1980 |
| Cambridge Motorhomes Ltd | Wholesale & retail | 2022 |
| Cambridge Multimedia Resources Ltd | Information & communication | 2003 |
| Cambridge Nexus Limited | Professional & scientific | 2016 |
| Cambridge Numerical Solutions Limited | Information & communication | 2004 |
| Cambridge Outboards Ltd | Manufacturing | 2015 |
| Cambridge Pain Consultants Limited | Health & social care | 2015 |
| Cambridge Pain Specialists Limited | Health & social care | 2015 |
| Cambridge Passivhaus Ltd | Construction | 2023 |
| Cambridge Pest Management Ltd | Administrative & support | 2024 |
| Cambridge Precast Limited | Manufacturing | 2014 |
| Cambridge Property Rentals Limited | Real estate | 2004 |
| Cambridge Riverside Management Company Limited | Real estate | 2003 |
| Cambridge Roofing Ltd | Extraterritorial | 2014 |
| Cambridge Sales & Consulting Ltd | Professional & scientific | 2017 |
| Cambridge Scientific Instruments Limited | Extraterritorial | 2010 |
| Cambridge Stonecraft Limited | Construction | 2004 |
| Cambridge Touring Productions Ltd | Arts & recreation | 2026 |
| Cambridge Traditional Builders Ltd | Construction | 2023 |
| Cambridgeshire Acre | Professional & scientific | 1998 |
| Cambridgeshire Clearance and Recycling Ltd | Water & waste | 2018 |
| Cambridgeshire Endodontic Care Limited | Health & social care | 2014 |
| Cambridgeshire Expressive Arts and Counselling Centre C.I.C. | Health & social care | 2020 |
| Cambridgeshire Filling Stations Limited | Real estate | 1993 |
| Cambridgeshire Hydraulics and Pneumatics Limited | Wholesale & retail | 1984 |
| Cambridgeshire Mobility Ltd | Health & social care | 2018 |
| Cambridgeshire Philatelic Auctions Limited | Wholesale & retail | 2019 |
| Cambridgeshire Windmills Consultancy Ltd | Professional & scientific | 2014 |
| Cambrixbio Ltd | Professional & scientific | 2025 |
| Cambs Mechanical Services Limited | Construction | 2017 |
| Cambs Motor Ltd | Wholesale & retail | 2024 |
| Cambs Paving Limited | Extraterritorial | 2022 |
| Cambs Property Limited | Real estate | 2019 |
| Cambuild Holdings Limited | Financial services | 2006 |
| Cambuild Limited | Construction | 1992 |
| Cambuild Property Ltd | Hospitality | 2021 |
| Camdenpick Ltd | Wholesale & retail | 2022 |
| Camdenpick NEO Ltd | Wholesale & retail | 2023 |
| Camin Technologies Ltd | Professional & scientific | 2024 |
| Cammed Therapeutics Ltd. | Professional & scientific | 2023 |
| Camouse Financial Management Limited | Professional & scientific | 2005 |
| CAN K Ltd | Hospitality | 2022 |
| Canna House Management Limited | Households | 1981 |
| Cannon Kirk Limited Liability Partnership | | 2009 |
| Cannon Kirk Wenny Limited | Construction | 2021 |
| Canopy and Crown Limited | Professional & scientific | 2025 |
| Cantele Ltd | Information & communication | 2018 |
| Capital Academy Ltd | Education | 2024 |
| Capper Management Company Ltd | Real estate | 2021 |
| Caps Limited | Administrative & support | 2008 |