| Burwash DEV Ltd | Construction | 2023 |
| Business Administration Bureau LLP | | 2011 |
| Business Improvement Leaders Limited | Administrative & support | 2025 |
| Business Plus Consultancy Ltd | Information & communication | 2012 |
| Busybody Ltd | Administrative & support | 2010 |
| BUT First, Yoga Ltd | Wholesale & retail | 2025 |
| Buy Whole Foods Family Co. Ltd | Financial services | 2022 |
| Buy Whole Foods Online Holdings Ltd | Financial services | 2021 |
| Buy Whole Foods Online Limited | Wholesale & retail | 2008 |
| Buzz Conversions Ltd | Manufacturing | 2025 |
| BY the Bay Management Ltd | Hospitality | 2025 |
| Byconstant: Digital Agency Limited | Information & communication | 2021 |
| C & J Industries Limited | Professional & scientific | 1990 |
| C and K Rileys Ltd | Hospitality | 2017 |
| C E H Healthcare Ltd | Health & social care | 2016 |
| C G Waters (D H Jones) Limited | Wholesale & retail | 2006 |
| C H C Nevill Limited | Administrative & support | 2002 |
| C Watkins Plumbing Limited | Construction | 2005 |
| C Wood Consulting Ltd | Professional & scientific | 2023 |
| C&R Snacking Limited | Wholesale & retail | 2017 |
| C.J. Sinclair Limited | Manufacturing | 1963 |
| C.K Electrical South East Ltd | Construction | 2023 |
| C2L Consultancy Limited | Professional & scientific | 2019 |
| CA Steel Property Holdings Ltd | Real estate | 2025 |
| Cable & Marine Ltd | Manufacturing | 2021 |
| Cabnet Cars Ltd | Transport & logistics | 2025 |
| Call Telecom Ltd | Information & communication | 1983 |
| Callan & Callan Ltd | Real estate | 2022 |
| Callis Limited | Professional & scientific | 2017 |
| Calmjoy Ltd | Wholesale & retail | 2026 |
| Camden Towners Limited | Real estate | 2005 |
| CAN LID Limited | Real estate | 2019 |
| Candi Entertainment Ltd | Arts & recreation | 2011 |
| Canterbury Canvas Ltd | Manufacturing | 2016 |
| Canterbury Stays Limited | Hospitality | 2020 |
| Cantium Safety Management Ltd | Professional & scientific | 2018 |
| Carbonsupplyuk Limited | Wholesale & retail | 2015 |
| Cardinalis Consultancy Limited | Professional & scientific | 2022 |
| Care 4 Hair Limited | Other services | 2002 |
| Career Analysts Ltd | Professional & scientific | 2007 |
| Careers at the Crossroads Ltd | Professional & scientific | 2023 |
| Carpentrybyjay Ltd | Construction | 2025 |
| Carr Property Investment Ltd | Real estate | 2025 |
| Casale DEL RIO Ltd | Real estate | 2022 |
| Castle & Keep Trading Limited | Professional & scientific | 2018 |
| Castle Sprinklers Limited | Construction | 2023 |
| Catalaioch Limited | Information & communication | 2011 |
| Catherine Harris Property Expert Limited | Real estate | 2020 |
| Catto Property Limited | Real estate | 2025 |
| Cave Creative Limited | Professional & scientific | 2013 |
| Cave Fencing Supplies Ltd | Administrative & support | 2019 |
| Caventa Ltd | Information & communication | 2025 |
| Cavity Guard Ltd | Construction | 2021 |
| CB Trade Developments Limited | Construction | 2013 |
| Ccsm Hospo Ltd | Hospitality | 2021 |
| Cdjf Trade Ltd | Professional & scientific | 2025 |
| Cerrapini Limited | Manufacturing | 2012 |
| CG Fitness Group Ltd | Wholesale & retail | 2021 |
| Chalmers Law Ltd | Professional & scientific | 2024 |
| Chamaiber Ltd | Real estate | 2018 |
| Chamberlain Rail & Civils Ltd | Construction | 2012 |
| Changes (2002) Ltd | Other services | 2003 |
| Changing Minds (Kent) CIC | Health & social care | 2017 |
| Channel Freight Storage Limited | Transport & logistics | 1957 |
| Channel Swimming & Piloting Services Ltd | Transport & logistics | 2011 |
| Channel Swimming Pilot Services Ltd | Transport & logistics | 2020 |
| Channing Properties & Developments Limited | Real estate | 2023 |
| Chaos Lighting Limited | Administrative & support | 2011 |
| Chapel Place Developments Ltd | Real estate | 2024 |
| Charleston Court Property Co. Limited | Households | 1994 |
| Charlesworth Fundraising Spaces Ltd | Other services | 2023 |
| Charlesworth Property South East Limited | Real estate | 2026 |
| Charlesworth Sykes Ltd | Administrative & support | 2018 |
| Charlie Mitchell Part of Footprints, Powered by EXP Ltd | Real estate | 2025 |
| Charlie Tango Property Services Ltd | Real estate | 2023 |
| Charlie's Classic Cocktails Ltd | Manufacturing | 2020 |
| Charlie's Margate Limited | Hospitality | 2026 |
| Charm Beauty Ltd | Other services | 2016 |
| Charm Chiro Ltd | Health & social care | 2026 |
| Charmed Aesthetics Ltd | Other services | 2022 |
| Chasing Clouds Publishing Limited | Arts & recreation | 2019 |
| Chatham & Clarendon Grammar School | Education | 2010 |
| Chatham House RTM Company Ltd | Households | 2025 |
| Chatham Street Freehold Company Limited | Real estate | 2012 |
| Chaucer Garage Equipment Limited | Wholesale & retail | 2003 |
| Chauffeur Hire Limited | Transport & logistics | 2022 |
| Checkup Health Ltd | Health & social care | 2025 |
| Chemical Compliance Advisory Services Limited | Other services | 2018 |
| Chester Browns Furniture Limited | Wholesale & retail | 1989 |
| Chido Healthcare Limited | Health & social care | 2022 |
| Chill OUT Vacations Limited | Real estate | 2019 |
| Chilton Property Holdings Ltd | Real estate | 2020 |
| Chimnies Limited | Health & social care | 1996 |
| Chipmatejz Limited | Hospitality | 2025 |
| Chris Constantine Design Limited | Professional & scientific | 2021 |
| Christ Church Church of England Junior School, Ramsgate | Education | 2013 |
| Chromotive Limited | Wholesale & retail | 2021 |
| Chun Chun Ltd | Hospitality | 2026 |
| Churchill Bricks Ltd | Real estate | 2019 |
| City & Urban Securities Limited | Real estate | 2007 |