| Chicken Treat Ltd | Hospitality | 2021 |
| Chiefs Logistics Ltd | Transport & logistics | 2023 |
| Chikochika Ltd | Transport & logistics | 2022 |
| Childcare Business Support Limited | Professional & scientific | 2016 |
| Childs Farm Services Ltd | Agriculture & fishing | 2022 |
| Chilldass Shielding Ltd | Other services | 2024 |
| Chilled Mountain Holidays Ltd | Hospitality | 2007 |
| Chirton Grange Limited | Transport & logistics | 2005 |
| Chobai Limited | Professional & scientific | 2015 |
| Chocker (Chatham) Limited | Wholesale & retail | 2010 |
| Choice Premier Investments Ltd | Real estate | 2024 |
| Choice Security Solutions Limited | Administrative & support | 2019 |
| Chrisbestservices Ltd | Transport & logistics | 2022 |
| Chrissngo Company Ltd | Health & social care | 2016 |
| Christfield Global Ltd. | Health & social care | 2015 |
| Christian Chalklen Ltd | Professional & scientific | 2019 |
| Christopher KYM Ltd | Wholesale & retail | 2019 |
| Chriswaw Ltd | Transport & logistics | 2015 |
| Chuck and Blade Burgers Ltd | Hospitality | 2024 |
| Chuck and Blade Burgers Poole Ltd | Hospitality | 2024 |
| Chuck and Blade Eastbourne Limited | Hospitality | 2023 |
| Chuck and Blade Maidenhead Limited | Hospitality | 2024 |
| Chuck and Blade Maidstone Ltd | Hospitality | 2024 |
| Chuck and Blade Ramsgate Limited | Hospitality | 2021 |
| Chuck and Blade Rochester Limited | Hospitality | 2021 |
| Church View Holdings Ltd | Real estate | 2024 |
| CIB Wealth Management LLP | | 2009 |
| CID 2019 Limited | Construction | 2019 |
| Circle Line Health Care Limited | Health & social care | 2024 |
| Citadel Group International Ltd | Professional & scientific | 2021 |
| Citrix Limited | Real estate | 2003 |
| City Accountants South East Ltd | Professional & scientific | 2020 |
| City Air Conditioning Ltd | Manufacturing | 2017 |
| City and Overseas Trade and Investments Limited | Real estate | 1989 |
| City Approach Limited | Real estate | 2025 |
| City Bollards Ltd | Construction | 2018 |
| City Commissioning Ltd | Construction | 2023 |
| City Contractors Ltd | Construction | 2023 |
| City Ductwork Ltd | Construction | 2023 |
| City Electrical Group Limited | Manufacturing | 2025 |
| City Estate Window Cleaning Ltd | Administrative & support | 2025 |
| City Facilities Ltd | Manufacturing | 2023 |
| City Group Holdings Ltd | Other services | 2016 |
| City Heat Pumps Ltd | Construction | 2023 |
| City Hvac Ltd | Construction | 2023 |
| City Insulation Ltd | Construction | 2023 |
| City Interior Installations Limited | Construction | 2013 |
| City Light Electrical and Maintenance Limited | Construction | 2020 |
| City Light Services Ltd | Manufacturing | 2023 |
| City Mechanical Ltd | Construction | 2018 |
| City Padel Group Limited | Wholesale & retail | 2025 |
| City Prime Investments Ltd | Real estate | 2025 |
| City Refrigeration Ltd | Construction | 2023 |
| City Screen Print Limited | Manufacturing | 2002 |
| City Technical Ltd | Construction | 2023 |
| City Ventilation Ltd | Construction | 2023 |
| City Way Nursery Limited | Education | 1995 |
| Citygate Ministries International | Education | 2014 |
| CJ Asbestos Ltd | Professional & scientific | 2022 |
| CJ Hall & SON Services Ltd | Construction | 2019 |
| Cj-Losmot Ltd | Health & social care | 2015 |
| CJH Planning Services Ltd | Professional & scientific | 2025 |
| CJS Cleaning & Maintenance Ltd | Administrative & support | 2026 |
| CJS Digital Ltd | Professional & scientific | 2026 |
| CK Cooling Limited | Construction | 2014 |
| CK Services (Kent) Ltd | Construction | 2026 |
| CKC SC Ltd | Health & social care | 2022 |
| CKO Aviation Limited | Transport & logistics | 2023 |
| CKS 7 Ltd | Information & communication | 2018 |
| CKV Financial Services Limited | Financial services | 2023 |
| CL Spear Consulting Ltd | Health & social care | 2026 |
| CL Steer & Co Ltd | Professional & scientific | 2025 |
| Clara LUX Estates Ltd | Hospitality | 2025 |
| Claridges CDV Ltd | Real estate | 2024 |
| Clarity and Choice Limited | Health & social care | 2013 |
| Clarity Marketing Services Ltd | Professional & scientific | 2023 |
| Clarityisa Ltd | Information & communication | 2026 |
| Clark & SON Services Ltd | Construction | 2021 |
| Classic Filters Ltd | Manufacturing | 2001 |
| Classic Filters NGV Limited | Manufacturing | 2014 |
| Classics DE Reve Limited | Wholesale & retail | 2019 |
| Clauando Transport Ltd | Transport & logistics | 2026 |
| Clbd CM Limited | Administrative & support | 2022 |
| Clbd Employee Ownership Trustee Limited | Professional & scientific | 2025 |
| Clbd Holdings Limited | Health & social care | 2016 |
| Clbd Limited | Health & social care | 2013 |
| Clean Air Technologies Limited | Professional & scientific | 1998 |
| Clean Dwellings Ltd | Administrative & support | 2021 |
| Clean Image Hygiene Limited | Manufacturing | 2004 |
| Clean Image Hygiene Properties Ltd | Real estate | 2023 |
| Clean Image Servicing Limited | Wholesale & retail | 2005 |
| Clean Room Construction Limited | Construction | 1974 |
| CLEAN4ALL Ltd | Water & waste | 2025 |
| Cleanexpert Limited | Other services | 2015 |
| Cleanvanta Ltd | Administrative & support | 2026 |
| Clear the Air LEV Testing Limited | Manufacturing | 2010 |
| Clearance Textiles Ltd. | Wholesale & retail | 1999 |
| Cleary Electrical Ltd | Construction | 2020 |
| Clems Haus Ltd | Arts & recreation | 2025 |
| CLF Plumbing & Heating Ltd | Construction | 2022 |