| Caversham Solutions Limited | Construction | 2014 |
| CCS Property Management Ltd | Real estate | 2020 |
| CDC (Tothill Street) Limited | Construction | 1988 |
| CDG Surrey Limited | Construction | 2008 |
| Cece Records Ltd | Information & communication | 2019 |
| Cedar Court (Caterham) Management Limited | Households | 2005 |
| Cedar Dental Laboratories Limited | Health & social care | 1971 |
| Cedar Investment Holding Limited | Financial services | 2025 |
| Cedar Park Caterham Residents Association Ltd | Professional & scientific | 2015 |
| Cedar Retail Consultancy Limited | Professional & scientific | 2013 |
| Cena House Management Limited | Households | 2021 |
| Centaur Dynamics Ltd | Professional & scientific | 2026 |
| Centium Software Limited | Information & communication | 2013 |
| Central Dyslexia Limited | Education | 2019 |
| Cerberus Systems Limited | Construction | 2004 |
| Certino Limited | Professional & scientific | 2017 |
| CES Air Conditioning Ltd | Construction | 2014 |
| CES Holdings Limited | Real estate | 2023 |
| Ceva Global Ltd | Information & communication | 2023 |
| Ceylon Cargo Limited | Transport & logistics | 2024 |
| CH Caterham Management Limited | Households | 2024 |
| CH SW15 Ltd | Real estate | 2024 |
| Chadj Investments Limited | Information & communication | 2008 |
| Chaldon Champions Ltd | Health & social care | 2020 |
| Chaldon Place Fryern Wood Management Company Limited | Households | 2015 |
| Champ Consultants Limited | Professional & scientific | 1999 |
| Champ Secretaries Limited | Administrative & support | 2001 |
| Chantal M Baker Ltd | Professional & scientific | 2022 |
| Chapman Property Solutions Ltd | Construction | 2019 |
| Charterham Limited | Construction | 1989 |
| Chartham Financial Planning Limited | Other services | 2016 |
| Chartwell Construction (Redhill) Ltd | Construction | 2025 |
| Chase Events Ltd | Households | 2024 |
| Chateau Compiegne One Ltd | Financial services | 2020 |
| Chateau Compiegne Two Ltd | Financial services | 2020 |
| Chatsworth Accounting Limited | Professional & scientific | 2002 |
| Chatto & Co (UK) Limited | Professional & scientific | 2004 |
| Chemitex Limited | Wholesale & retail | 1979 |
| Cherry Blossom Court Coulsdon Limited | Households | 2024 |
| CHI Combat System Martial Arts Limited | Public administration | 2003 |
| Chilcott, White & Co. (Management) Limited | Real estate | 1977 |
| Chiller Experts Limited | Manufacturing | 2010 |
| Chilli Melon Limited | Wholesale & retail | 2012 |
| Chiltern Place Caterham Limited | Households | 2021 |
| Chivani Ltd | Wholesale & retail | 2020 |
| Chloe Gardiner Grooming Ltd | Other services | 2022 |
| Ciphercom Ltd | Construction | 2022 |
| CIT Caterham Ltd | Hospitality | 2020 |
| Citizenme Limited | Information & communication | 2017 |
| Citizens Advice Tandridge District | Other services | 2011 |
| Civil Networks Limited | Information & communication | 2022 |
| CJH Consultancy Services Limited | Financial services | 2003 |
| Clamp Consulting Limited | Professional & scientific | 2007 |
| Clancy-Bloom Ltd | Other services | 2003 |
| Classify AI Ltd | Information & communication | 2025 |
| Clearco Limited | Manufacturing | 2021 |
| Clearviews Contractors Ltd | Agriculture & fishing | 2018 |
| Clementine Bridal Boutique Limited | Wholesale & retail | 2018 |
| Clive Olympia Ltd. | Administrative & support | 2015 |
| Cloomi.Ai Ltd | Information & communication | 2024 |
| Cloud GDS Limited | Information & communication | 2013 |
| Cloudpro Consulting Limited | Information & communication | 2018 |
| Cloverleaf Developments (Dorking) Ltd | Construction | 2024 |
| Cloverleaf Developments (England) Ltd | Construction | 2023 |
| Cloverleaf Developments (Lewes) Ltd | Construction | 2026 |
| Cloverleaf Developments (Reigate) Ltd | Construction | 2026 |
| Clownfish Products Limited | Manufacturing | 2025 |
| CLW HR Consulting Ltd | Administrative & support | 2023 |
| CMC Solutions Ltd | Information & communication | 2014 |
| Cmglobal Ltd | Wholesale & retail | 2025 |
| CMI Property Management Limited | Households | 2026 |
| CNK Fire & Security Limited | Construction | 2018 |
| Coached by AMY Ltd | Education | 2021 |
| Coco Tilley Developments Limited | Extraterritorial | 2016 |
| Code Kids Stem Limited | Information & communication | 2022 |
| Codekids-Surrey Limited | Education | 2019 |
| Coffee & Creams (Surrey) Ltd | Hospitality | 2016 |
| Coffee Flamingo Ltd | Wholesale & retail | 2021 |
| Colab Nation Limited | Information & communication | 2024 |
| Coldal Management Consulting Ltd | Professional & scientific | 2014 |
| Cole Cleaning Ltd | Administrative & support | 2017 |
| Colinear Limited | Information & communication | 2014 |
| Collective Contracts Ltd | Construction | 2023 |
| Collingnam Limited | Other services | 2004 |
| Colonoscopy Services Limited | Health & social care | 2014 |
| Colour House Interior Design Ltd | Professional & scientific | 2019 |
| Colour House Interiors Ltd | Other services | 2021 |
| Comicsandstuffuk Ltd | Wholesale & retail | 2026 |
| Complete Construction South East Ltd | Construction | 2020 |
| Complete Leisure Limited | Real estate | 1979 |
| Complete Property Solutions Limited | Administrative & support | 2025 |
| Concept 3D Limited | Professional & scientific | 2018 |
| Conduct & Integrity Services Limited | Professional & scientific | 2024 |
| Connected and Inspired Ltd | Professional & scientific | 2019 |
| Consultancy Matters Limited | Professional & scientific | 2017 |
| Consultancy Surveying Services Ltd | Professional & scientific | 2020 |
| Consultant EYE Services Partnership LLP | | 2010 |
| Contango Markets Limited | Administrative & support | 1999 |
| Convesa Limited | Information & communication | 2016 |
| Copper Clothing Ltd. | Administrative & support | 2012 |