| CC Crown Birmingham Student Housing Limited | Financial services | 2023 |
| CC Crown Nottingham Student Housing Limited | Real estate | 2022 |
| CC Fencing Ltd | Professional & scientific | 2015 |
| CC Homeware Limited | Wholesale & retail | 2025 |
| CC Pet Solutions Ltd | Professional & scientific | 2026 |
| CC Signature Ltd | Wholesale & retail | 2025 |
| Ccam Limited | Real estate | 2018 |
| CCB Locksmiths Limited | Administrative & support | 2022 |
| CCC Bojin Ltd | Construction | 2026 |
| Ccedg Ltd | Transport & logistics | 2026 |
| CCI Logistics Ltd | Transport & logistics | 2025 |
| CCL Company Secretarial Services Limited | Professional & scientific | 2003 |
| CCP Group Holdings Limited | Financial services | 2024 |
| CCP Group Ltd | Construction | 2004 |
| CCP Holdings UK Ltd | Financial services | 2019 |
| CCR Electrical Limited | Construction | 2024 |
| CCR Inc Limited | Professional & scientific | 2012 |
| CCS (MK) Limited | Transport & logistics | 2018 |
| CD Legal Services Ltd | Professional & scientific | 2021 |
| CD Services Limited | Professional & scientific | 2022 |
| CD8 Enterprises Limited | Professional & scientific | 2017 |
| Cddvdworld Ltd | Wholesale & retail | 2009 |
| Cdep Services Ltd | Construction | 2019 |
| CDH Consultancy Ltd | Professional & scientific | 2024 |
| CDL Mechanical Engineering Ltd | Wholesale & retail | 2024 |
| CDL Rendering Limited | Construction | 2009 |
| CDM Web and Marketing Limited | Professional & scientific | 2025 |
| CDR Medical Systems Ltd | Wholesale & retail | 2024 |
| CDR Projects Ltd | Other services | 2026 |
| Cdrl Group Ltd | Professional & scientific | 2026 |
| CDS Furniture Limited | Wholesale & retail | 2019 |
| CE Transport Services Ltd | Transport & logistics | 2026 |
| Cebiso M Ltd | Information & communication | 2021 |
| Cedar Care Consult Ltd | Health & social care | 2019 |
| Cedar Court (Wolverton Road) Management Company Limited | Households | 2013 |
| Cedar Court Limited | Households | 1922 |
| Cedarblue Technologies Ltd | Information & communication | 2025 |
| Cedartime Enterprises UK Ltd. | Health & social care | 2015 |
| Ceekay IT & Network Solutions Ltd | Information & communication | 2014 |
| Ceelect Consultants Ltd | Administrative & support | 2003 |
| Ceetee Properties Ltd. | Construction | 2014 |
| Cegna Limited | Extraterritorial | 2019 |
| CEI Limited | Transport & logistics | 1995 |
| CEJ Collective Limited | Administrative & support | 2023 |
| Cela Limited | Transport & logistics | 2014 |
| Celebrant Resource and Information Library Ltd | Extraterritorial | 2021 |
| Celeste Care Limited | Health & social care | 2017 |
| Celestial Realty Ltd | Real estate | 2025 |
| Celestial Travel Limited | Real estate | 2002 |
| Celestra Holdings Limited | Financial services | 2022 |
| Celestra Leisure Limited | Administrative & support | 2022 |
| Celestra Limited | Information & communication | 2006 |
| Celestra Property Limited | Real estate | 2024 |
| Cellippu Ltd | Real estate | 2020 |
| Cellswapper Ltd | Other services | 2024 |
| Celmj Ltd | Health & social care | 2023 |
| Celoura Ltd | Wholesale & retail | 2026 |
| Celsey Ltd | Hospitality | 2018 |
| Celtic Process Control Limited | Construction | 1981 |
| Cenna Care Services Ltd | Real estate | 2023 |
| Cenobiologics Ltd | Manufacturing | 2011 |
| Centar Ltd | Information & communication | 2021 |
| Centaur Pharmaceuticals UK Ltd | Manufacturing | 2025 |
| Centauri Tech Ltd | Information & communication | 2019 |
| Centerpoint Consulting Limited | Professional & scientific | 2022 |
| Centigrade International Limited | Professional & scientific | 2005 |
| Central & Southern Homes Ltd | Health & social care | 2020 |
| Central Advisory and Training Services Limited | Administrative & support | 1999 |
| Central ARC Angels Ltd | Administrative & support | 2024 |
| Central Baptist Association | Other services | 2001 |
| Central Business Units Limited | Other services | 2020 |
| Central Case Management Limited | Health & social care | 2009 |
| Central Cellar Limited | Wholesale & retail | 2025 |
| Central Horizon Limited | Real estate | 2021 |
| Central Horizon Properties LLP | | 2021 |
| Central Jamia Mosque and Islamic Educational Centre | Other services | 2017 |
| Central Office of Public Interest CIC | Education | 2018 |
| Central School of English Limited | Extraterritorial | 1972 |
| Central Staffing Limited | Health & social care | 2015 |
| Centralised Healthcare Limited | Health & social care | 2023 |
| Centralube Limited | Professional & scientific | 1984 |
| Centratus Limited | Information & communication | 2011 |
| Centre 70 | Health & social care | 1987 |
| Centre for Pastoral Counselling & Psychotherapy Education Limited | Education | 2011 |
| Centre for Strategy Implementation Limited | Professional & scientific | 2014 |
| Centreline Design & Development Limited | Professional & scientific | 2007 |
| Centrex Group Services Ltd | Financial services | 2021 |
| Centrex Services Ltd | Other services | 2022 |
| Centric Care Solutions Ltd | Health & social care | 2021 |
| Centric Community Projects Limited | Health & social care | 2012 |
| Centric Living Ltd | Real estate | 2019 |
| Centry Ltd | Administrative & support | 2019 |
| Centum Group Global Ltd | Administrative & support | 2012 |
| Centum Group Ltd | Real estate | 2020 |
| Centum Security Ltd | Administrative & support | 1998 |
| Centurion Care Group Ltd. | Health & social care | 2022 |
| Centurion ER Ltd | Real estate | 2017 |
| Centurion Software Limited | Information & communication | 2021 |
| Century 21 Technologies Ltd | Extraterritorial | 2015 |
| CEO Empire Limited | Professional & scientific | 2025 |