| Cadra UK Ltd | Professional & scientific | 2015 |
| Caenyris Ltd | Wholesale & retail | 2026 |
| Cafe Bonbon Ltd | Hospitality | 2025 |
| Cafe Sorella Ltd | Hospitality | 2026 |
| Caffeina Coffee Limited | Hospitality | 2019 |
| Caffin Estates Ltd | Real estate | 2023 |
| Café Carla Limited | Wholesale & retail | 2024 |
| Cahill Design Consultants Limited | Administrative & support | 2014 |
| Cahill Group Holdings Limited | Financial services | 2023 |
| Cairntower Limited | Professional & scientific | 2015 |
| Caisley Eartag Ltd | Agriculture & fishing | 2013 |
| Cajilu Limited | Health & social care | 2025 |
| Cake at 64 the Bake Shed Limited | Manufacturing | 2025 |
| Caladanian Ltd | Wholesale & retail | 2006 |
| Caledonia Equestrian Ltd | Arts & recreation | 2020 |
| Calibre Build & Design Limited | Construction | 2012 |
| Calipso (Roast) Limited | Wholesale & retail | 1974 |
| Call-Tech Limited | Administrative & support | 2019 |
| CALL4DRIVERS Ltd | Transport & logistics | 2023 |
| Callegari Property Holdings Limited | Real estate | 2019 |
| Calpageam Consulting Ltd | Professional & scientific | 2025 |
| Calrowmad Limited | Manufacturing | 2015 |
| Calton Hill Investments Limited | Professional & scientific | 2009 |
| Calum French Boxing Ltd | Arts & recreation | 2021 |
| Calvaria Limited | Professional & scientific | 2012 |
| Calvert K9 Limited | Administrative & support | 2026 |
| Calvin Street Management Limited | Real estate | 2014 |
| Camace Ltd | Information & communication | 2019 |
| Cambria 81 Ltd | Real estate | 2007 |
| Cambridge Centre for Animal Rights Law | Professional & scientific | 2019 |
| Cambridge Commercial Property Limited | Real estate | 2015 |
| Cambridge Guarantee Holdings Limited | Financial services | 2010 |
| Cambridge Guarantee Limited | Financial services | 2007 |
| Cambridge Home Physio Limited | Health & social care | 2022 |
| Cambridge Telecom Ltd | Information & communication | 2019 |
| Cambs Poet Ltd | Real estate | 2025 |
| Camby Legal Ltd | Information & communication | 2017 |
| Camby Square Ltd | Wholesale & retail | 2016 |
| Camcan Ltd | Administrative & support | 2008 |
| Camden Boss Limited | Manufacturing | 1986 |
| Camden Fish Ltd | Hospitality | 2025 |
| Cameo Future Investments Ltd | Real estate | 2020 |
| Cameron Cavendish Consultants Limited | Professional & scientific | 2009 |
| Cameron Cavendish Fine Wines Limited | Wholesale & retail | 2001 |
| Campion Mill Limited | Professional & scientific | 2013 |
| Campoamor Investments Limited | Real estate | 2012 |
| Campos Transports Ltd | Transport & logistics | 2023 |
| Canary Media Limited | Information & communication | 2015 |
| Candid Construction Limited | Construction | 2022 |
| Candy Property Services Ltd | Real estate | 2012 |
| Canine Companionship Limited | Other services | 2024 |
| Cann Limited | Financial services | 2021 |
| Cannondale Investments Ltd | Real estate | 2015 |
| Canopy Safe UK Limited | Administrative & support | 2019 |
| Canpas Limited | Extraterritorial | 2008 |
| Canto FM Limited | Information & communication | 2026 |
| Canvascraft Creative Ltd | Extraterritorial | 2026 |
| Capel Building Services Ltd | Construction | 2016 |
| Capel Country Foods Limited | Wholesale & retail | 2008 |
| Capel Engineering Limited | Professional & scientific | 2019 |
| Capel Food Ltd | Hospitality | 2025 |
| Capel Logistics & Services Ltd | Transport & logistics | 2018 |
| Capel Mushrooms Limited | Agriculture & fishing | 1999 |
| Capel Pharma Ltd | Wholesale & retail | 2016 |
| Capel Plumbing & Heating Ltd | Construction | 2015 |
| Capel Properties Limited | Real estate | 2015 |
| Capel Station Garage LLP | | 2022 |
| Capel Valeting Centre Limited | Administrative & support | 2013 |
| Capel Village Bar Ltd | Hospitality | 2024 |
| Caphub Ltd | Professional & scientific | 2020 |
| Capital Venture Group Ltd | Real estate | 2025 |
| Capitaldom Olvic Ltd | Financial services | 2009 |
| Capitalised Financial Limited | Financial services | 2021 |
| Capitana Seas Debt Management LP | | 2020 |
| Capitol Jump 2 IT Limited | Wholesale & retail | 2014 |
| Capitol Stud Farm Limited | Other services | 2011 |
| Cappadocia Ipswich Limited | Hospitality | 2019 |
| Capra Tech Solutions Ltd | Wholesale & retail | 2025 |
| Caps (Suffolk) Ltd | Construction | 2023 |
| Capsule Marketing Limited | Manufacturing | 2020 |
| Capture Green Limited | Manufacturing | 2012 |
| Capturedit Group Limited | Information & communication | 2021 |
| Capzen Limited | Administrative & support | 2024 |
| Car Cocoon Limited | Transport & logistics | 2024 |
| Car Import Suffolk Limited | Transport & logistics | 2024 |
| Car Service Holek Ltd | Wholesale & retail | 2024 |
| Car Wizard (Beds) Ltd | Wholesale & retail | 2024 |
| Car-Glass & Trim Limited | Wholesale & retail | 1983 |
| Caraccio Cleaning Ltd | Administrative & support | 2025 |
| Caraccio's Limited | Construction | 2013 |
| Carats Company Limited | Wholesale & retail | 1998 |
| Carbaza Ltd | Wholesale & retail | 2022 |
| Carbon Champions CIC | Professional & scientific | 2022 |
| Carbune Ltd | Construction | 2022 |
| Cardiff Home Share Limited | Real estate | 2023 |
| Cardinal Financial Planning and Wealth Management Limited | Administrative & support | 2015 |
| Cardinal Group of Companies Limited | Transport & logistics | 2024 |
| Cardinal Security Ltd | Administrative & support | 2026 |
| Care Development East Limited | Education | 2006 |
| Care First Express Ltd | Health & social care | 2022 |