| Carer Love CIC | Education | 2024 |
| Carers R US Ltd | Health & social care | 2026 |
| Caresque Limited | Professional & scientific | 2025 |
| Cargolink Detour Ltd | Extraterritorial | 2023 |
| Carlfuturize Limited | Information & communication | 2025 |
| Carlos Drain Digest Ltd | Construction | 2026 |
| Carly’S Beauty Limited | Other services | 2025 |
| Carmorgan Ltd | Real estate | 2017 |
| Carpet Remnant Centre 2 Ltd | Wholesale & retail | 2009 |
| Carquee Limited | Extraterritorial | 2024 |
| Cart Limited | Wholesale & retail | 2018 |
| Carteco Electrical Contractors Ltd | Construction | 2026 |
| Carter Hair and Beauty Supplies Limited | Wholesale & retail | 2019 |
| Carwin Industry Co., Ltd | Manufacturing | 2022 |
| Casey Catlin Aesthetics Ltd | Other services | 2026 |
| Casey Inns Limited | Hospitality | 2020 |
| Casey Shelden's Ltd | Other services | 2011 |
| Casey Shelden’S Salon’S & Franchise Ltd | Other services | 2018 |
| Castle Carpentry & Building Contractors Ltd | Construction | 2018 |
| Catapult Solutions Limited | Administrative & support | 2009 |
| Caterer Gravesham Limited | Hospitality | 2012 |
| Cathcart Gate Estate Management Limited | Households | 2012 |
| Catherine MAY Hannaford Ltd | Extraterritorial | 2025 |
| Caustic Network Ltd | Arts & recreation | 2013 |
| Cavelights Ltd | Wholesale & retail | 2022 |
| Cavell LOCKE6904 Limited | Health & social care | 2023 |
| Cavus Building & Decorator Ltd | Construction | 2018 |
| Cayless Constructions Ltd | Construction | 2023 |
| Cazaly Carpentry Ltd | Construction | 2013 |
| CB Healthcare Consulting Ltd | Professional & scientific | 1988 |
| CB Installs Ltd | Construction | 2026 |
| CBR Construction Limited | Construction | 2018 |
| CCP Broadcast Services Limited | Information & communication | 2018 |
| CD Flooring Contracts Ltd | Construction | 2022 |
| CDG Heating Limited | Construction | 2015 |
| CDS Medical Limited | Wholesale & retail | 2024 |
| Cedarmark Limited | Households | 1997 |
| Ceeti Exports Limited | Wholesale & retail | 2017 |
| Celion Fashion World Ltd | Wholesale & retail | 2023 |
| Cemat (Holdings) Ltd | Financial services | 2025 |
| CEN Catering Ltd | Hospitality | 2023 |
| Cenaehil Fiori Co., Ltd | Manufacturing | 2025 |
| Centre Arts Ltd | Arts & recreation | 2021 |
| CEO Design Service (UK) Ltd | Professional & scientific | 2024 |
| Cerulean Consultants Limited | Information & communication | 2020 |
| Ceylon Outlet UK (PVT) Limited | Wholesale & retail | 2017 |
| CGN Business Services Ltd | Information & communication | 2010 |
| CHA YI Tea Limited | Wholesale & retail | 2013 |
| Chaffers Estate Agents Limited | Real estate | 2008 |
| Chakula Limited | Wholesale & retail | 2009 |
| Chalkers Removals Ltd | Professional & scientific | 1998 |
| Chambers Heating Solutions Ltd | Construction | 2021 |
| Chandlers Wharf Management Company Limited | Households | 1999 |
| Change Agent Sun Limited | Hospitality | 2000 |
| Chant Building and Renovations Ltd | Construction | 2016 |
| Chapter One Apartments ME4 Ltd | Construction | 2018 |
| Chapter Renovations Limited | Construction | 2015 |
| Charcoal Grill Gillingham Ltd | Hospitality | 2022 |
| Charcoal Grill SP8 Limited | Hospitality | 2025 |
| Charcoal Town Kebab Limited | Hospitality | 2019 |
| Charge Electrical Contractors Ltd | Construction | 2023 |
| Charles Edward (South) Ltd | Professional & scientific | 2019 |
| Charles Edward Limited | Professional & scientific | 2012 |
| Charleston Bespoke Homes Ltd | Agriculture & fishing | 2006 |
| Charlotte Court (Newington) Management Company Limited | Households | 2018 |
| Chatham Cabs Ltd | Transport & logistics | 2025 |
| Chauhan Motors Limited | Wholesale & retail | 2026 |
| CHB Media Ltd | Professional & scientific | 2009 |
| Cheema Contracts Ltd | Construction | 2018 |
| Cheema Electrical Ltd | Construction | 2008 |
| Cheema Fitness Limited | Arts & recreation | 2022 |
| Cheema Investments South East Limited | Arts & recreation | 2016 |
| Cheema Leisure Ltd | Arts & recreation | 2023 |
| Cheersgaffer Ltd | Information & communication | 2026 |
| Chef Delight (Kent) Limited | Hospitality | 2024 |
| Chefs of India Limited | Hospitality | 2020 |
| Chegg MST Limited | Wholesale & retail | 2023 |
| Chestfield Homes Limited | Real estate | 2016 |
| Chevron Ltd | Professional & scientific | 2026 |
| Chez Lons Hospitality Limited | Hospitality | 2015 |
| Chiari Cleaning Ltd | Administrative & support | 2025 |
| Chidley Thermal Insulation Limited | Construction | 2026 |
| Chiko Trading Ltd | Health & social care | 2023 |
| China Calcium Carbide Industry Co., Ltd | Manufacturing | 2022 |
| China East Steel Co., Ltd | Manufacturing | 2022 |
| China Hongkun Supply Chain Co., Ltd | Manufacturing | 2022 |
| China Jinko Energy Technology Co., Ltd | Energy | 2025 |
| China Jinkoao Technology Co., Ltd | Energy | 2025 |
| China Sinotruck International Exporting Limited | Manufacturing | 2019 |
| China Vehicle Co., Limited | Wholesale & retail | 2022 |
| Chinese Health Clinic Limited | Health & social care | 2007 |
| Chivine Limited | Real estate | 2024 |
| Chixtv Studios Ltd | Information & communication | 2021 |
| Chlocherc Care Ltd | Health & social care | 2025 |
| Choice Plumbing & Heating Limited | Extraterritorial | 2018 |
| Chow & Chow Property Holding Limited | Real estate | 2025 |
| Chowmeo Limited | Wholesale & retail | 2025 |
| Chris Berwick Limited | Administrative & support | 2011 |
| Chris Claydon Limited | Manufacturing | 2016 |
| Chris Rose Plumbing & Heating Care Ltd | Construction | 2014 |