| C.Lever Developments Ltd | Real estate | 2025 |
| C.M. Barandia Ltd | Health & social care | 2021 |
| C.P Tree & Landscapes Limited | Administrative & support | 2025 |
| C.P.G Plastech Limited | Manufacturing | 2017 |
| C.P.R Lighting Ltd | Construction | 2012 |
| C.R.E.A.M Capital Limited | Professional & scientific | 2023 |
| C.W Window Cleaning Services Limited | Administrative & support | 2018 |
| C24 Retail Group Ltd | Wholesale & retail | 2026 |
| C4G Marketing Limited | Wholesale & retail | 2015 |
| CAB4ALL Ltd | Transport & logistics | 2025 |
| Cabba Limited | Wholesale & retail | 2012 |
| Cabhire BFD Ltd | Administrative & support | 2017 |
| Cabi's Cabs Limited | Transport & logistics | 2024 |
| Cabin Pressure Ltd | Professional & scientific | 2024 |
| Cabitec Limited | Manufacturing | 2024 |
| CAD File Limited | Construction | 2007 |
| Cad-Draft Services Limited | Professional & scientific | 1991 |
| Cadogan Street Property Management Limited | Other services | 2019 |
| Cads Transport Limited | Transport & logistics | 2003 |
| Cadtech (York) Limited | Construction | 2021 |
| Caesar Financial Solutions Limited | Financial services | 2022 |
| Caesar Safety and Wellbeing Ltd | Health & social care | 2024 |
| Caesars Fast Food Ltd | Hospitality | 2018 |
| Caesars Pizza Middleton Ltd | Hospitality | 2019 |
| CAF Partners Limited | Administrative & support | 2015 |
| Cafe Akbar Ltd | Hospitality | 2007 |
| Cafe Açaí Limited | Hospitality | 2024 |
| Cafe Bismilla Ltd | Hospitality | 2019 |
| Cafe BON Apptit Ltd | Hospitality | 2023 |
| Cafe by J'Adore Ltd | Hospitality | 2025 |
| Cafe by Noor Ltd | Hospitality | 2025 |
| Cafe Celine Limited | Hospitality | 2025 |
| Cafe Chester’S Limited | Hospitality | 2018 |
| Cafe Craving Plaza Ltd | Hospitality | 2025 |
| Cafe Jadore Limited | Hospitality | 2020 |
| Cafe Janan Limited | Hospitality | 2011 |
| Cafe Noir Gomersal Ltd | Hospitality | 2025 |
| Cafe Regal Limited | Manufacturing | 2015 |
| Cafe Solutions Limited | Hospitality | 2024 |
| Cafe Vybe Limited | Hospitality | 2025 |
| Cafe West | Health & social care | 2001 |
| Cafe Zuni Hyderabadi Ltd | Hospitality | 2024 |
| Cafemiddys Ltd | Hospitality | 2025 |
| Café Narguilé Ltd | Hospitality | 2016 |
| CAH Global Limited | Wholesale & retail | 2021 |
| Cain Process Serving Ltd | Administrative & support | 2018 |
| Cairo Zaks Ltd | Hospitality | 2019 |
| Cairo's Diner Ltd | Hospitality | 2025 |
| Cairos Kebab House Ltd | Hospitality | 2026 |
| CAK Autos Ltd | Wholesale & retail | 2025 |
| Cake & Dessert Distributors Ltd | Wholesale & retail | 2025 |
| Cake Box Duckworth Lane Limited | Hospitality | 2017 |
| Cake Cartel Ltd | Wholesale & retail | 2025 |
| Cakes and Pastries Ltd | Manufacturing | 2024 |
| Cakes by SB Limited | Manufacturing | 2025 |
| Cakes Enterprises Limited | Manufacturing | 2019 |
| Cakes&Treats Ltd | Wholesale & retail | 2020 |
| Calanthe Estate Ltd | Real estate | 2025 |
| Calanthe Group Ltd | Professional & scientific | 2024 |
| Calcinco Limited | Professional & scientific | 2011 |
| Caldene Limited | Wholesale & retail | 1985 |
| Calder C.A.D. Limited | Construction | 1979 |
| Calder Castings Limited | | 1964 |
| Calder Detailing Ltd. | Professional & scientific | 2003 |
| Calder Leasing and Management Limited | Financial services | 1997 |
| Calder Valley Environmental LLP | | 2025 |
| Calibre Financial Solutions Limited | Financial services | 2020 |
| California Krispy Ltd | Hospitality | 2024 |
| Calis Franchise Ownership Ltd | Professional & scientific | 2024 |
| Call the Computer GUY Limited | Other services | 2012 |
| Callaway Property Management Ltd | Real estate | 2026 |
| Callum and Rhys Limited | Wholesale & retail | 2025 |
| Callum Leach Wealth Management Ltd | Professional & scientific | 2019 |
| Callum Pubs Ltd | Hospitality | 2020 |
| Calvert&Muldo Ltd | Other services | 2026 |
| Calyx Support Services Ltd | Health & social care | 2024 |
| Camden Belle Holding Ltd | Financial services | 2025 |
| Camden Belle Limited | Professional & scientific | 2012 |
| Camden Connaught Ltd | Wholesale & retail | 2018 |
| Camelija Home Care Ltd | Health & social care | 2025 |
| Campbell Cafe Ltd | Hospitality | 2026 |
| Campbell Stewart Associates Limited | Professional & scientific | 2010 |
| Camperdown Enterprise Ltd | Hospitality | 2025 |
| CAMPS4ALL CIC | Education | 2023 |
| Canada Joinery & Building Limited | Construction | 2005 |
| CANAL30 Apartments Company Limited | Construction | 2015 |
| Cancede Limited | Construction | 2009 |
| Candia Cafe (Bradford) Limited | Hospitality | 2019 |
| Candy & Capes Ltd | Manufacturing | 2026 |
| Candy Closet Ltd | Wholesale & retail | 2025 |
| Candy Crunch Global Limited | Wholesale & retail | 2024 |
| Candy Hero Ltd | Wholesale & retail | 2008 |
| Candy Krush Limited | Wholesale & retail | 2026 |
| Cannolo Ltd | Hospitality | 2025 |
| Cannon Engineering (Yorkshire) Limited | Manufacturing | 2004 |
| Canton Bradford Ltd | Hospitality | 2024 |
| Canton Girl Ltd | Hospitality | 2019 |
| Cape Mohair Topmakers Limited | Extraterritorial | 2001 |
| Cape Wools International Limited | Extraterritorial | 2001 |
| Capital Carpets & Furniture Ltd | Wholesale & retail | 2023 |