| Camden OUD Limited | Administrative & support | 2025 |
| Camellia Global Services UK Ltd | Hospitality | 2020 |
| Camelot Clothing Ltd | Wholesale & retail | 2025 |
| Cameriz Limited | Wholesale & retail | 2025 |
| Cameron Cleaning Services Ltd | Administrative & support | 2025 |
| Cameron Coaching & Consulting Ltd | Professional & scientific | 2023 |
| Cameron Court Residents Management Company Limited | Households | 2005 |
| Cameron’S Kitchen Limited | Hospitality | 2025 |
| Camethru Ltd | Information & communication | 2025 |
| Campbell Close Streatham London Limited | Households | 2019 |
| Campbell Reclaims Ltd | Water & waste | 2025 |
| Campden Freeholds Company Limited | Households | 1989 |
| Campden Hill Gate (Freehold) Limited | Households | 1999 |
| Campden Hill Gate Limited | Households | 1976 |
| Campden Maintenance Limited | Households | 1973 |
| Camper and Motorhome Centre Ltd | Wholesale & retail | 2018 |
| Camping Nerd Limited | Wholesale & retail | 2025 |
| Campingvanrentals Limited | Administrative & support | 2022 |
| Camyar International Limited | Professional & scientific | 1969 |
| CAN 56 RTM Company Limited | Households | 2011 |
| Canal Bank Mews Residents Association Limited | Households | 2003 |
| Canalside (Middlewich) Management Company Limited | Households | 2017 |
| Canard Services Limited | Professional & scientific | 2016 |
| Canary Technologies Ltd | Professional & scientific | 2024 |
| Canary Wharf Information Security Consultants Ltd | Professional & scientific | 2019 |
| Canberra Drive (Block a) Management Company Limited | Households | 1992 |
| Canberra Drive (Block E) Management Company Limited | Households | 1993 |
| Canberra Drive (Block F) Management Company Limited | Households | 1993 |
| Canberra Drive (Block G) Management Company Limited | Households | 1992 |
| Canberra Drive (Block H) Management Company Limited | Households | 1992 |
| Canberra Drive (Blocks B and C) Management Company Limited | Households | 1993 |
| Canbury Place Management Company (NO.2) Limited | Households | 1997 |
| Candeliver Ltd | Wholesale & retail | 2025 |
| Candia Films Ltd | Professional & scientific | 2015 |
| Cane Bespoke Lighting Limited | Manufacturing | 2023 |
| Canela Leisure Limited | Hospitality | 2017 |
| Canlan Trading Co., Ltd | Wholesale & retail | 2023 |
| Cann-@Bi Limited | Health & social care | 2025 |
| Canning Contract Services Limited | Financial services | 2015 |
| Canning Property Management Limited | Real estate | 2014 |
| Cannongate (Slough) Management Company Limited | Households | 2002 |
| Canons Close NO.1 Residents Company Limited | Households | 1993 |
| Canopy & Co Solutions Ltd | Administrative & support | 2017 |
| Cantab Leisure Limited | Arts & recreation | 2014 |
| Canterbury Care and Support Limited | Health & social care | 2021 |
| Canterbury Court Management Co. Limited | Households | 1969 |
| Canterbury Support Ltd | Health & social care | 2022 |
| Canterbury Tender Care Nursery Ltd | Extraterritorial | 2017 |
| Canton Glory Limited | Hospitality | 2025 |
| Canvas Melody Hotel Ltd | Hospitality | 2025 |
| Canyon Projects Limited | Administrative & support | 2014 |
| CAP Foehn Limited | Financial services | 2017 |
| CAP Greener Apple Services Limited | Education | 2021 |
| Cap.Sq. RTM Company Limited | Households | 2012 |
| CAPCARE2 Ltd | Health & social care | 2024 |
| Cape Container Line (UK) Ltd | Transport & logistics | 2018 |
| Cape Holdings Limited | Wholesale & retail | 2015 |
| Cape Ross Limited | Financial services | 2011 |
| Capelia House Management Company Limited | Households | 1989 |
| Capernaum Consulting Limited | Professional & scientific | 2017 |
| Capital 1 Limited | Real estate | 2015 |
| Capital Acquisitions Ltd | Real estate | 2025 |
| Capital Bookkeeping Services Ltd | Professional & scientific | 2020 |
| Capital Bridge Consultancy Limited | Professional & scientific | 2025 |
| Capital Car Hire Limited | Other services | 2010 |
| Capital City Media Limited | Professional & scientific | 1990 |
| Capital Dipor Exzie Limited | Professional & scientific | 2024 |
| Capital GRP Limited | Construction | 2020 |
| Capital Immigration Services Ltd | Professional & scientific | 2023 |
| Capital Merchant and Investment Group Ltd | Financial services | 2020 |
| Capital Property Experts Ltd | Administrative & support | 2025 |
| Capital Response Limited | Administrative & support | 1993 |
| Capital Shield Security Ltd | Administrative & support | 2024 |
| Capital Towers RTM Company Ltd | Households | 2017 |
| Capital Wharf Management Company Limited | Households | 1997 |
| Capitale Ltd | Real estate | 2025 |
| Capitique Ltd | Professional & scientific | 2020 |
| Capitol Catering Equipment Ltd | Other services | 2007 |
| Capitol Square Limited | Households | 2006 |
| Capri Extensions Ltd | Other services | 2020 |
| Caprice Trading Limited | Wholesale & retail | 2015 |
| Capricorn Electrical Ltd | Construction | 2015 |
| Capricouture Ltd | Manufacturing | 2024 |
| Capsaris Holdings UK Limited | Real estate | 2017 |
| Capsaris Pharma Ltd | Wholesale & retail | 2023 |
| Capshire Advisory Services Limited | Professional & scientific | 2015 |
| Capsicum General Partner Limited | Professional & scientific | 2009 |
| Capsicum Private Office IP LLP | | 2015 |
| Capsicum Touring Car R&D Ltd. | Administrative & support | 2017 |
| Capsicum Ventures Ltd | Professional & scientific | 2025 |
| Capstone Accountants Limited | Professional & scientific | 2010 |
| Capstone Healthcare Limited | Health & social care | 2014 |
| Capstone Heights Management Company Limited | Households | 2011 |
| Capstone Plus Ltd | Administrative & support | 2020 |
| Captain Chippies Ltd | Manufacturing | 2025 |
| Captain Digital Healthcare UK Ltd | Health & social care | 2023 |
| Captivia Limited | Households | 2023 |
| Capulet Management Company Limited | Households | 2001 |
| Car & Commercial Sales Limited | Extraterritorial | 1991 |
| Car Body Cosmetics Limited | Wholesale & retail | 2014 |