| Carol Court Limited | Households | 1998 |
| Carole Martin Limited | Construction | 2014 |
| Caroline Charlton Consulting Limited | Professional & scientific | 2006 |
| Caroline Preston Partners LLP | | 2024 |
| Carp Construction Limited | Construction | 2019 |
| Carpenters Tree Care Ltd | Administrative & support | 2022 |
| Carpetthemoon.Com Limited | Wholesale & retail | 2011 |
| Carpetworld (Southern) Limited | Wholesale & retail | 2001 |
| Carshop Ltd | Wholesale & retail | 1989 |
| Cart Group Ltd | Professional & scientific | 2024 |
| Cart Services Limited | Professional & scientific | 1999 |
| Caruso Consulting Limited | Professional & scientific | 2019 |
| Casa Bella Properties Ltd | Hospitality | 2020 |
| Casa Italia (Epsom) Limited | Hospitality | 2003 |
| Cascadia House Residents Management Company Limited | Households | 2004 |
| Cascadian Limited | Information & communication | 2021 |
| Cashbak Ltd | Financial services | 2010 |
| Cass Marine Ltd | Manufacturing | 2024 |
| Cassava Restaurant Ltd | Hospitality | 2024 |
| Castilian House Limited | Real estate | 2005 |
| Castillo Associates Ltd | Professional & scientific | 2013 |
| Castillo Technical Services Ltd | Construction | 2024 |
| Castle Day Nurseries Ltd | Health & social care | 2012 |
| Castro Brothers Ltd | Hospitality | 2026 |
| CAT5 Cabling Limited | Information & communication | 2013 |
| Catalyst for Excellence Ltd | Professional & scientific | 2026 |
| Cathcraig Property Limited | Real estate | 2023 |
| Catherine Lodge (Waddon) Residents Association Limited | Real estate | 1973 |
| Cathy Watson Coaching Limited | Other services | 2021 |
| Causality Limited | Professional & scientific | 2018 |
| Cavellway Limited | Construction | 2013 |
| Cavendish Court (Kingston) Management Limited | Households | 1999 |
| Cavey Dale Group Limited | Administrative & support | 1990 |
| Cayman Auto Properties Ltd | Real estate | 2021 |
| Cayman Auto Services Limited | Wholesale & retail | 2005 |
| CB Studios Ltd | Other services | 2025 |
| CB Swimming Limited | Arts & recreation | 2010 |
| CBU Management Ltd | Professional & scientific | 2014 |
| CCF Joinery Limited | Construction | 2016 |
| Cdms Holdings Ltd | Professional & scientific | 2019 |
| Cdvending Ltd | Hospitality | 2023 |
| Cecpm Limited | Real estate | 2010 |
| Cedar Court Freeholders Limited | Households | 2002 |
| Cedar Oaks Solutions Ltd | Information & communication | 2020 |
| Cedarfield Enterprises Ltd | Information & communication | 2025 |
| Cedars Advisory Limited | Professional & scientific | 2023 |
| CEE TEE Holdings Limited | Professional & scientific | 2011 |
| Ceiag Limited | Professional & scientific | 2021 |
| CEL Critical Power UK Limited | Manufacturing | 2021 |
| Celebration Gifts for ALL Ltd | Wholesale & retail | 2013 |
| Central Tool Hire Limited | Construction | 1984 |
| Central Walk Ltd | Households | 2015 |
| Centre Court Tennis Limited | Arts & recreation | 1990 |
| Centre for Law and Transformative Change Ltd | Education | 2023 |
| Centre for Reproductive Immunology and Pregnancy Ltd | Extraterritorial | 2015 |
| Centre of Excellence in Advanced Engineering Services (Ceaes) Ltd | Professional & scientific | 2019 |
| Centrepoint Computer Services Limited | Information & communication | 1991 |
| Centrepoint Property Developments Ltd | Construction | 2015 |
| Centum Management Ltd | Households | 2013 |
| Ceramic Clipper Blade Company Limited | Wholesale & retail | 2020 |
| CES Lighting & Electrical Specialists LLP | | 2016 |
| Cestar Limited | Wholesale & retail | 2023 |
| Cetacea Education Services Limited | Education | 2024 |
| Ceylon Tea Centre Limited | Wholesale & retail | 2012 |
| CFF Homes Ltd | Real estate | 2025 |
| CFG Project Management Limited | Professional & scientific | 2016 |
| CG Ground Limited | Households | 2022 |
| CG Technical Ltd | Professional & scientific | 2019 |
| CH Holdings (Esher) Limited | Financial services | 2026 |
| Chadacre Consultancy Limited | Professional & scientific | 2007 |
| Chadha Holdings Ltd | Real estate | 2020 |
| Chalsys LLP | | 2011 |
| Chamjoeun LAB Ltd | Manufacturing | 2016 |
| Chances Clothing Ltd | Wholesale & retail | 2025 |
| Chandler House Limited | Households | 2017 |
| Change Connect Logistics Limited | Transport & logistics | 2022 |
| Change Connect Voice & Data Limited | Information & communication | 2020 |
| Change Direction 100 Ltd | Other services | 2007 |
| Change to Thrive Limited | Professional & scientific | 2025 |
| Channel Letter Bender Ltd | Wholesale & retail | 2004 |
| Chanon Consulting Ltd | Administrative & support | 2013 |
| Chante Leilani Limited | Manufacturing | 2025 |
| Chantilly (FIR Tree RD, Epsom) Residents Company Ltd | Households | 2014 |
| Chantry Court (Eastbourne) Limited | Households | 1960 |
| Chapel Properties Limited | Real estate | 1996 |
| Charles Property Limited | Construction | 2017 |
| Charlesbye Limited | Professional & scientific | 2021 |
| Charlie Pickering Design Ltd | Administrative & support | 2017 |
| Charlotte Magazines UK Ltd | Wholesale & retail | 2022 |
| Charter Harley Street Limited | Health & social care | 2008 |
| Charterman Wealth Management Limited | Professional & scientific | 2022 |
| Charting Solutions Limited | Professional & scientific | 2015 |
| Chase Co Management Ltd | Real estate | 2019 |
| Chase Co. Ltd | Real estate | 2016 |
| Chase Court Residents Company Limited | Real estate | 2025 |
| Chase of Chichester Limited | Construction | 2003 |
| Chate Investments Ltd | Real estate | 2019 |
| Chatom Consulting Limited | Professional & scientific | 2020 |
| Chatsworth Cheam Road Management Company Limited | Real estate | 1987 |
| Chaudhry Breeder Ltd | Agriculture & fishing | 2023 |