| Canute Limited Liability Partnership | | 2003 |
| Canute Software Ltd | Information & communication | 2020 |
| Canute Solutions Ltd | Administrative & support | 2018 |
| Canvas of HIS Grace Ltd | Wholesale & retail | 2020 |
| Caosys Limited | Information & communication | 2000 |
| CAP Consultants Ltd | Information & communication | 1997 |
| CAP HPI Limited | Information & communication | 2012 |
| CAP Marketing Ltd | Professional & scientific | 2017 |
| CAP Retail Ltd | Wholesale & retail | 2008 |
| Capable Consultancy Limited | Construction | 2024 |
| Capable Services Limited | Construction | 2024 |
| Caparo Industries PLC | Professional & scientific | 1959 |
| Capca Ltd | Information & communication | 2023 |
| Capestone Properties Ltd | Real estate | 2026 |
| Capex (Fareham) Limited | Construction | 2025 |
| Capex (Portfolio 1) Limited | Real estate | 2023 |
| Capex (Portfolio 2) Limited | Real estate | 2024 |
| Capex (Portfolio 3) Limited | Real estate | 2024 |
| Capex (Portfolio 4) Limited | Construction | 2025 |
| Capex (Stockport) Limited | Construction | 2025 |
| Capf CIC | Professional & scientific | 2023 |
| Capital Analytical Ltd | Professional & scientific | 1997 |
| Capital Brands Limited | Wholesale & retail | 2019 |
| Capital Car Contracts Limited | Professional & scientific | 1992 |
| Capital Electrical Services Ltd | Construction | 2025 |
| Capital Residencies & Accommodation Limited | Real estate | 2017 |
| Capital Takeaway 2024 Ltd | Hospitality | 2024 |
| Capital Valeting Leeds Ltd | Administrative & support | 2021 |
| Capitaltruism Ltd | Professional & scientific | 2024 |
| Capitalyse Ltd | Financial services | 2021 |
| Capitol Park Barnsley Limited | Construction | 1995 |
| Capitol Park Barnsley West Limited | Construction | 2016 |
| Capitol Park East Yorkshire Limited | Real estate | 2021 |
| Capitol Park Goole Limited | Construction | 2003 |
| Capitol Park J28 M62 Ltd | Construction | 2016 |
| Capitol Park J36 M62 Ltd | Construction | 2016 |
| Capitol Park J37 M1 Ltd | Construction | 2016 |
| Capitol Park J58 A1 Limited | Construction | 2023 |
| Capitol Park J66 A1 Limited | Construction | 2022 |
| Capitol Park Leeds Limited | Construction | 1996 |
| Capones Pizza Ltd | Hospitality | 2019 |
| Cappuccino Service Centre Ltd | Wholesale & retail | 2024 |
| Capri at DAM Ltd | Hospitality | 2024 |
| Capri Calvert Electrics Ltd | Wholesale & retail | 2010 |
| Capri Chapel Allerton (Yorkshire) Ltd | Hospitality | 2025 |
| Capri Finance Limited | Professional & scientific | 2010 |
| Capri Holdings WKD Ltd | Financial services | 2022 |
| Capri Home Dining Collingham Ltd | Hospitality | 2017 |
| Capri Licenses Ltd | Hospitality | 2023 |
| Capri MED Ltd | Hospitality | 2026 |
| Capri Restaurant Horbury Ltd | Hospitality | 2025 |
| Capri Woods Ltd | Hospitality | 2026 |
| Capricorn Media Management Limited | Administrative & support | 2021 |
| Capricornbuilding Ltd | Construction | 2023 |
| Capsid Biometrics Limited | Information & communication | 2016 |
| Capslok Limited | Wholesale & retail | 2018 |
| Capstan Blue Ltd | Information & communication | 2010 |
| Capstone Compliance Ltd | Professional & scientific | 2025 |
| Captain Creps Limited | Wholesale & retail | 2022 |
| Captain Home Ltd | Real estate | 2018 |
| Captain Khaos Records Ltd | Professional & scientific | 2025 |
| Captain Thornton's (Chapel Allerton) Limited | Hospitality | 2021 |
| Captain Thornton's Limited | Hospitality | 2017 |
| Captains Mate Limited | Professional & scientific | 2020 |
| Captured One Ltd | Wholesale & retail | 2025 |
| Capybara Jijifiongos Ltd | Hospitality | 2024 |
| Car and Commercials Limited | Wholesale & retail | 2024 |
| Car Boutique Ltd | Wholesale & retail | 2022 |
| Car Enhancements UK Ltd | Wholesale & retail | 2018 |
| Car Events Ltd | Information & communication | 2020 |
| Car Planet Contracts Limited | Professional & scientific | 1999 |
| Car Rental Reservation Ltd | Administrative & support | 2026 |
| Car Trade School Ltd | Wholesale & retail | 2025 |
| Car-Rific Limited | Wholesale & retail | 2024 |
| Caranova Aesthetics and Skin Limited | Other services | 2025 |
| Caravan Repair Services Ltd | Construction | 2024 |
| Caravel Consulting Ltd | Information & communication | 2014 |
| Caravel Financial Services Ltd | Financial services | 2014 |
| Carbide Tooling E-Commerce Ltd | Wholesale & retail | 2019 |
| Carbide Tooling Group Ltd | Other services | 2014 |
| Carbis Property Management Ltd | Real estate | 2025 |
| Carbis Wharf West LLP | | 2021 |
| Carbon Fingerprint Ltd | Professional & scientific | 2021 |
| Carbon II Bidco Limited | Financial services | 2020 |
| Carbon II Midco 1 Limited | Financial services | 2020 |
| Carbon II Midco 2 Limited | Financial services | 2020 |
| Carbon II Midco 3 Limited | Financial services | 2020 |
| Carbon Kitchens Limited | Professional & scientific | 2014 |
| Carbon Motion Limited | Administrative & support | 2025 |
| Carbon Neutral Group Limited | Professional & scientific | 2021 |
| Carbon Performance Cars Ltd | Wholesale & retail | 2026 |
| Carbon Reduction Technology Ltd | Manufacturing | 2008 |
| Carbon Superbikes Yorkshire Limited | Wholesale & retail | 2019 |
| Carbon Vector Limited | Information & communication | 2026 |
| Carbon Wasp Ltd | Manufacturing | 2015 |
| Carbon.Climate.Certified Group Limited | Professional & scientific | 2021 |
| Carbon.Climate.Certified Ltd | Construction | 1992 |
| Carbonowl Ltd | Manufacturing | 2020 |
| Carbro Group Ltd | Financial services | 2026 |
| Carcal Holdings Limited | Financial services | 2020 |