| Carpet Tiles & Accessories Limited | Wholesale & retail | 2002 |
| Carpets for ALL Yorkshire Ltd | Wholesale & retail | 2023 |
| Carpets Paid Weekly Limited | Wholesale & retail | 2017 |
| Carpets-Online UK Ltd | Wholesale & retail | 2026 |
| Carr Care Limited | Health & social care | 2015 |
| Carr Lane Business Park Ltd | Real estate | 2022 |
| Carrbottom Road Convenience Store and OFF Licence Ltd | Wholesale & retail | 2024 |
| Carroll Couriers Limited | Transport & logistics | 2023 |
| Cars and Kettles Competitions Ltd | Other services | 2025 |
| Cars Trade (BFD) Ltd | Wholesale & retail | 2024 |
| Cars Unlimited Ltd | Wholesale & retail | 2015 |
| CARS4U Ltd | Wholesale & retail | 2026 |
| Carsavvy Ltd | Wholesale & retail | 2026 |
| Carsavyy Ltd | Wholesale & retail | 2026 |
| Carshop Central Limited | Wholesale & retail | 2023 |
| Carswell Professional Services Limited | Administrative & support | 2014 |
| Cartechuk Ltd | Wholesale & retail | 2020 |
| Carter Distribution Limited | Wholesale & retail | 2014 |
| Carter Lane Management Company Limited | Households | 1996 |
| Carter Northern Developments Ltd | Real estate | 2022 |
| Cartman Education Services Limited | Education | 2024 |
| Cartronics Bradford Limited | Administrative & support | 2011 |
| Cartworth Quarries Ltd | Construction | 2019 |
| Cartwright Hotel Ltd | Hospitality | 2017 |
| Cartwright Hotel Yorkshire Ltd | Hospitality | 2025 |
| Cartwright Solicitors Limited | Professional & scientific | 2011 |
| Carty Goods Ltd | Wholesale & retail | 2021 |
| Carzforu Ltd | Wholesale & retail | 2026 |
| CAS Candy Limited | Wholesale & retail | 2023 |
| CAS Clouds (U.K) Limited | Wholesale & retail | 2023 |
| Casa Commercial Investments Ltd | Real estate | 2026 |
| Casa DAS Andorinhas Limited | Professional & scientific | 1998 |
| Casa DE Fumar Ltd | Hospitality | 2023 |
| Casa DI Pasta York Limited | Hospitality | 2018 |
| Casa MIA Holdings Limited | Hospitality | 2004 |
| Casa Pizza II Limited | Hospitality | 2024 |
| Casa Pizza Liverpool Ltd | Hospitality | 2025 |
| Casa Property Investments North Ltd | Real estate | 2023 |
| Casa Residential Ltd | Real estate | 2023 |
| Casa Zano Ltd | Wholesale & retail | 2026 |
| Casdel Properties Ltd | Real estate | 2022 |
| Casedeal Limited | Extraterritorial | 2025 |
| Casey & Brown Properties Limited | Real estate | 2025 |
| Caseys Carpets Ltd | Wholesale & retail | 2024 |
| Cashmere Fibres International Limited | Wholesale & retail | 1999 |
| Cashmolane Ltd | Extraterritorial | 1975 |
| Caspian Charcoal Cuisine Ltd | Hospitality | 2019 |
| Caspian Cuisine Bradford Ltd | Hospitality | 2023 |
| Cast (BFD) Ltd | Other services | 2005 |
| CAST3D Medical Ltd | Manufacturing | 2024 |
| Castle Cards Limited | Extraterritorial | 1950 |
| Castle Home Improvements Centre Limited | Real estate | 2011 |
| Castle Residential Properties Limited | Construction | 2004 |
| Castlefield Manufacturing Company (Bingley) Limited | Professional & scientific | 1980 |
| Castles in the Sky Projects CIC | Administrative & support | 2023 |
| Castletown Balti Ltd | Hospitality | 2019 |
| Cat Construction Yorkshire Limited | Construction | 2025 |
| Cat Joinery Limited | Construction | 2025 |
| Catalin Construction Ltd | Construction | 2026 |
| Catant Ltd | Manufacturing | 2022 |
| Catch a Bargain Ltd | Wholesale & retail | 2021 |
| CATCH-22 Vehicle Solutions Ltd | Wholesale & retail | 2024 |
| Catchco Limited | Manufacturing | 2025 |
| Catchylook Beauty Salon Ltd | Other services | 2025 |
| Caterform Stainless Steel Fabrications Limited | Manufacturing | 1987 |
| Catering Equipment Warehouse Ltd | Manufacturing | 2018 |
| Caterleisure Group Limited | Financial services | 2022 |
| Caterleisure Limited | Hospitality | 1976 |
| Caterleisure Services Limited | Hospitality | 1982 |
| Caterservice Limited | Hospitality | 1989 |
| Cationplex Ltd | Wholesale & retail | 2023 |
| Cato GAS Services Limited | Construction | 2016 |
| Causelink Ltd | Professional & scientific | 2025 |
| Causeway Bay Group Ltd | Wholesale & retail | 2019 |
| Causton Group Limited | Other services | 2017 |
| Cavallo-Uk Limited | Wholesale & retail | 2024 |
| Cavalry Services Limited | Wholesale & retail | 2019 |
| Cavelle Designs Ltd | Manufacturing | 2025 |
| Cavendish Homes Property Management Ltd | Real estate | 2014 |
| CAX Intelligence Services Ltd | Information & communication | 2021 |
| Caxmay Property Limited | Real estate | 2026 |
| Caygill Holdings Limited | Professional & scientific | 2007 |
| Caygushka Limited | Extraterritorial | 2011 |
| CAZ Domestic Appliances Ltd | Wholesale & retail | 2025 |
| CB & Sons Holdings Limited | Real estate | 2018 |
| CB Driver Hire Ltd | Transport & logistics | 2019 |
| CB Hammersmith Holdings Ltd | Administrative & support | 2026 |
| CB Hammersmith Ltd | Real estate | 2026 |
| CB Hotels Ltd | Hospitality | 2018 |
| CB INV Ltd | Real estate | 2023 |
| CBD Plug Limited | Information & communication | 2019 |
| CBD Wonderland Ltd | Manufacturing | 2018 |
| Cbdshed Limited | Wholesale & retail | 2018 |
| Cbmdc Building Schools for the Future Limited | Education | 2006 |
| Cbprp Ltd | Real estate | 2019 |
| Cbrm Trading Limited | Hospitality | 2024 |
| CC Direct Northern Limited | Wholesale & retail | 2025 |
| CC Electrical & Sons Ltd | Construction | 2025 |
| CC Light Haulage Ltd | Transport & logistics | 2017 |
| Ccas Yorks Ltd | Professional & scientific | 2019 |