| Calder & Partners Ltd | Professional & scientific | 2026 |
| Calder Finco UK Ltd | Professional & scientific | 2006 |
| Calder Group (Trustees) Limited | Professional & scientific | 2002 |
| Calder Group Holdings Limited | Professional & scientific | 2015 |
| Calder Group Limited | Professional & scientific | 1998 |
| Calder Holdings Limited | Professional & scientific | 1998 |
| Calder Industrial Materials Limited | Manufacturing | 1889 |
| Calder International Holdings Limited | Professional & scientific | 1998 |
| Caldy Construction Limited | Construction | 2010 |
| Caley Securities Ltd | Real estate | 2025 |
| Calibre Rail Limited | Construction | 2018 |
| Califia Farms UK Limited | Manufacturing | 2017 |
| Caliwineuk Ltd | Wholesale & retail | 2026 |
| Calm Coffee Group CIC | Health & social care | 2023 |
| Calsbar Developments Ltd | Manufacturing | 2015 |
| Calverts Autocentre Ltd | Wholesale & retail | 2025 |
| Cambr Consulting Limited | Professional & scientific | 2023 |
| Cambrian Commercial Limited | Administrative & support | 2020 |
| Cambrian Court Limited | Households | 1982 |
| Cambrian Investments Limited | Administrative & support | 2018 |
| Cameron Bisset Limited | Professional & scientific | 2020 |
| Cameron Charters LLP | | 2010 |
| Camhs Consultancy Ltd | Health & social care | 2010 |
| Camlet Investments Limited | Professional & scientific | 2014 |
| Camouflage Trading Limited | Financial services | 2026 |
| Campaigning Against Peoples Poverty Community Interest Company | Other services | 2018 |
| Campbell Creative Solutions Limited | Information & communication | 2013 |
| Campbell&Graham Ltd | Households | 2018 |
| Camper Calling Limited | Administrative & support | 2018 |
| Camper JAM Limited | Administrative & support | 2018 |
| Campincar Ltd | Wholesale & retail | 2025 |
| Camrad Ltd | Health & social care | 2024 |
| Camrose Consulting Limited | Professional & scientific | 2026 |
| CAN B Learning Ltd | Professional & scientific | 2026 |
| Canal Marine Services Limited | Other services | 1980 |
| Canary Foods Limited | Wholesale & retail | 2023 |
| Canda Commercial Holdings Ltd | Financial services | 2021 |
| Canda Property & Investments Ltd | Real estate | 1982 |
| Candasen Global Market Ltd | Wholesale & retail | 2025 |
| Candid Financial Planning Limited | Financial services | 2011 |
| Candoo Group PLC | Wholesale & retail | 2019 |
| Candover Estates Limited | Financial services | 2003 |
| Candy Lashes Ltd | Wholesale & retail | 2024 |
| Candy Melt Frodsham Ltd | Wholesale & retail | 2025 |
| Candymelts Frodsham Ltd | Wholesale & retail | 2026 |
| Canebeto Ltd | Professional & scientific | 2020 |
| Canford Columbia Limited | Construction | 2021 |
| Cannif Limited | Wholesale & retail | 2026 |
| Cannon Kirk (Northern) Limited | Construction | 1999 |
| Canongate Management Company Limited | Households | 1994 |
| Cantargold Consulting Ltd | Professional & scientific | 2025 |
| Canteen Creative Productions Ltd | Information & communication | 2025 |
| Canter Assets | Professional & scientific | 2021 |
| Canward Holdings Limited | Real estate | 2023 |
| Cap-One Investments Limited | Financial services | 2016 |
| Capacity Marketing Ltd | Professional & scientific | 2018 |
| Capenhurst Festival Limited | Arts & recreation | 2025 |
| Capenhurst Village Pre-School Limited | Education | 2019 |
| Capital and Income Estates Ltd | Real estate | 2015 |
| Capital Bank Leasing 5 Limited | Extraterritorial | 1959 |
| Capital Business Loans Limited | Financial services | 2022 |
| Capital Consultancies UK Ltd | Education | 2022 |
| Capital Edge Ventures Limited | Wholesale & retail | 2024 |
| Caps Properties Ltd | Real estate | 2022 |
| Capstan Court Freehold Limited | Households | 2000 |
| Captec Solutions Ltd | Administrative & support | 2019 |
| Captive Devices Ltd | Professional & scientific | 2024 |
| Captive Parts Solutions Limited | Wholesale & retail | 2005 |
| Capuchin Coffee Ltd | Hospitality | 2022 |
| Car Clearance Warehouse Limited | Wholesale & retail | 1992 |
| Car Clinic MOT Centre Limited | Wholesale & retail | 2019 |
| Car Clinic MOT Ltd | Wholesale & retail | 2025 |
| Car Dealer Reviews Limited | Information & communication | 2021 |
| Car Loan First Limited | Wholesale & retail | 2023 |
| Car Tinting UK Limited | Wholesale & retail | 2013 |
| Caramel (Chester) Ltd | Hospitality | 2014 |
| Caraspace Environmental Planning Limited | Professional & scientific | 2008 |
| Caraspace Limited | Professional & scientific | 2002 |
| Carbo Neutro LLP | | 2021 |
| Carbon Reduction Initiative Limited | Information & communication | 2020 |
| Cardak Fast Food Ltd | Hospitality | 2024 |
| Carden & Co (Malpas) Ltd | Extraterritorial | 2016 |
| Carden Arms (Malpas) Ltd | Hospitality | 2014 |
| Carden Design and Developments Company | Professional & scientific | 2014 |
| Carden Historic Cottages LLP | | 2014 |
| Carden Property Developments Ltd | Construction | 2014 |
| Cardiac Chambers Limited | Health & social care | 2012 |
| Cardiff Broadcasting Company Limited | Information & communication | 1978 |
| Cardinal Living Limited | Hospitality | 2026 |
| Care and Support TM Ltd | Health & social care | 2017 |
| Care Handbook Ltd | Information & communication | 2021 |
| Care R WE Ltd | Real estate | 2021 |
| Carebotics Limited | Professional & scientific | 2022 |
| Careco Healthcare Limited | Health & social care | 2004 |
| Cariad Investments Limited | Financial services | 2019 |
| Caribbean Connection Limited | Administrative & support | 1972 |
| Caribbean Flaava Limited | Manufacturing | 2012 |
| Caris Jade Collection Ltd | Wholesale & retail | 2019 |
| Carl Duckett & Co Limited | Construction | 2022 |
| Carl's Car Care Limited | Wholesale & retail | 2025 |