| Canvas & Light Ltd | Administrative & support | 2018 |
| Capai PLC | Professional & scientific | 2011 |
| Capcha Limited | Manufacturing | 2006 |
| Capithol Limited | Professional & scientific | 2017 |
| Capmedia (UK) Ltd | Professional & scientific | 2016 |
| Capmedical (UK) Ltd | Extraterritorial | 2019 |
| Cappco Limited | Administrative & support | 2008 |
| Captains Original Ltd | Manufacturing | 2018 |
| Capture One Story Ltd | Information & communication | 2016 |
| Captureman Ltd | Manufacturing | 2017 |
| Car Location Limited | Wholesale & retail | 2011 |
| Cara Technology Limited | Information & communication | 1988 |
| Cards & Collectables Limited | Wholesale & retail | 2025 |
| Carers at Home Limited | Health & social care | 2006 |
| Carling Recruitment Limited | Extraterritorial | 1999 |
| Carmen Joyner Ltd | Education | 2018 |
| Carnaby and Vine Ltd | Wholesale & retail | 2023 |
| Carvell Holdings Ltd | Financial services | 2013 |
| Carvell Properties Ltd | Real estate | 2013 |
| Carx Taxi Service Limited | Transport & logistics | 2026 |
| Cassabo Ltd | Wholesale & retail | 2013 |
| Castillian Town & Country Limited | Construction | 2007 |
| Castillocullis Ltd | Real estate | 2025 |
| Castle Green Developments (Caen) Limited | Real estate | 2018 |
| Castle Green Developments Limited | Construction | 2018 |
| Castle Street Property Limited | Construction | 2021 |
| CATALYST44 Ltd | Information & communication | 2018 |
| Caterpillar Corner Preschool Limited | Health & social care | 2025 |
| Catteshall Lane Developments | | 1989 |
| Catteshall Management Ltd | Real estate | 2016 |
| Catteshall Mill (Residential Management) Limited | Real estate | 2004 |
| Catton Comms Ltd | Professional & scientific | 2024 |
| Cazza Campbell Ltd | Administrative & support | 2025 |
| CBL DJP Ltd | Professional & scientific | 2026 |
| CBM Investments (UK) Limited | Administrative & support | 2004 |
| Ccapl Limited | Financial services | 2017 |
| Ccil Holdings Ltd | Financial services | 2025 |
| Ccma Holdings Limited | Professional & scientific | 2020 |
| CDL Mortgages Limited | Financial services | 2025 |
| Ce&Cm Properties LLP | | 2020 |
| Cedar Court (Petersfield) Ltd | Real estate | 2017 |
| Cedar Court Apartments Limited | Extraterritorial | 2018 |
| Cedar Grove Estates | Construction | 1999 |
| Cedar Landscapes (Surrey) Ltd | Administrative & support | 2013 |
| Cenote Pharma Limited | Wholesale & retail | 2015 |
| Cerebrus Associates Limited | Professional & scientific | 2012 |
| Certabuild Ltd. | Other services | 2021 |
| Certainly Stuff Ltd | Information & communication | 2022 |
| Cest Maison 2022 Limited | Real estate | 2022 |
| Cest Maison Property Services Limited | Households | 2023 |
| Ceti Development Limited | Wholesale & retail | 2024 |
| CFA Wealth Management Ltd | Professional & scientific | 2025 |
| CGW Snooker LLP | | 2013 |
| Chagford Investments Limited | Financial services | 2022 |
| Chai Baithak Ltd | Hospitality | 2026 |
| Chalex Trading Limited | Wholesale & retail | 2017 |
| Chaos Design Limited | Arts & recreation | 1987 |
| Chapel Acre Ltd | Wholesale & retail | 2026 |
| Chapel Lane 1 Limited | Real estate | 2015 |
| Chappell Hospitality Consulting Limited | Professional & scientific | 2010 |
| Chapter Two Ltd | Information & communication | 2016 |
| Charles House Surrey Limited | Households | 2025 |
| Charlham Consulting Limited | Information & communication | 2010 |
| Charlouis Consulting Ltd | Administrative & support | 2025 |
| Charlton Education Ltd | Education | 2021 |
| Charlwood Pharma Limited | Wholesale & retail | 2015 |
| Charterhouse Cars Ltd | Transport & logistics | 2025 |
| Charterhouse International Limited | Education | 2018 |
| Charterhouse School Design & Build Limited | Construction | 2008 |
| Chartmaster Limited | Professional & scientific | 1996 |
| Chartwell SL Limited | Financial services | 2020 |
| Charville Academy | Education | 2013 |
| Chaveta Limited | Wholesale & retail | 2025 |
| CHD Complex Care Ltd | Health & social care | 2023 |
| CHD Living Ltd | Health & social care | 2018 |
| CHD Living Properties Limited | Construction | 2023 |
| CHD Surrey Ltd | Health & social care | 2018 |
| Checkmate Premium Brands Ltd | Wholesale & retail | 2013 |
| Cheeky Chimps Stay & Play Cafe Ltd | Education | 2019 |
| Chelminster Limited | Construction | 2013 |
| Chelsminster Capital Limited | Construction | 2018 |
| CHERMONT2.0 Limited | Professional & scientific | 2012 |
| Cherry Blossom Care Home Limited | Health & social care | 2013 |
| Chesterman Consultants Limited | Real estate | 1972 |
| Chichester Hotel Company Limited Liability Partnership | | 2006 |
| Children in Motion Ltd | Health & social care | 2009 |
| Chipco Investments Limited | Administrative & support | 2017 |
| Chloes Cosmetic Limited | Other services | 2020 |
| Chobham RFC (Trading) Limited | Arts & recreation | 2016 |
| Chobham Rugby Football Club Limited | Arts & recreation | 2012 |
| Choose to Thrive Limited | Administrative & support | 2011 |
| Chowdhury and Park Ltd | Other services | 2022 |
| Chrismin Ltd | Professional & scientific | 2025 |
| Church House Two Limited | Administrative & support | 2001 |
| Church View Close Elstead Management Limited | Households | 2012 |
| Churchmill Limited | Extraterritorial | 2019 |
| Churchmill Partnership Ltd | Professional & scientific | 2012 |
| Cicada Travel Ltd | Administrative & support | 2022 |
| Cignpost Advised Limited | Financial services | 2001 |
| Cignpost Corporate Limited | Financial services | 2024 |