| Casa Patrice Ltd | Construction | 2022 |
| Cascade Interactive Limited | Information & communication | 2024 |
| Cascadehill LLP | | 2016 |
| Cashify Hub Ltd | Wholesale & retail | 2025 |
| Cashpilot Ltd | Information & communication | 2023 |
| Cassidy Web Services Ltd | Information & communication | 2011 |
| Castle Accounting Services Ltd | Professional & scientific | 2021 |
| Castle Builders Kent Ltd | Water & waste | 2024 |
| Castle Fish Bar (Walmer) Limited | Hospitality | 2024 |
| Castle Street Kebab Ltd | Hospitality | 2021 |
| Catalyx Innovation Ltd | Administrative & support | 2022 |
| Catalyx Marketing Limited | Administrative & support | 2016 |
| Catapult Talent Solutions Ltd | Administrative & support | 2023 |
| Catchinglives | Health & social care | 1992 |
| Cathedral Building Ltd | Construction | 2026 |
| Cathedral Enterprises Limited | Wholesale & retail | 1996 |
| Cathedral Landscapes Kent Ltd | Administrative & support | 2011 |
| Cathedral Roofing Ltd | Construction | 2026 |
| Cathedral Software Services Limited | Information & communication | 1997 |
| Catlaw Limited | Education | 2020 |
| Cavenagh Estates Limited | Real estate | 2025 |
| Cavenagh Health Limited | Administrative & support | 2010 |
| Cavenagh LLP | | 2023 |
| Caviar Care Limited | Administrative & support | 2026 |
| Cavour London Ltd | Wholesale & retail | 2020 |
| Cbng Holdco Ltd | Financial services | 2023 |
| Cbuoy Ltd | Transport & logistics | 2020 |
| CC Canterbury Ltd | Hospitality | 2023 |
| CC Productions (South East) Ltd | Information & communication | 2015 |
| CC Roofing and Building Contractors Ltd | Construction | 2022 |
| CCA Properties Limited | Real estate | 2004 |
| Ccbundlelab Ltd | Wholesale & retail | 2026 |
| CCE Prevailing Ltd | Real estate | 2022 |
| Ccph Electrical Limited | Construction | 2025 |
| CD Food & Drink Limited | Hospitality | 2018 |
| CDL Law Ltd | Professional & scientific | 2025 |
| CDP Architecture Limited | Professional & scientific | 2000 |
| Cease International Limited | Information & communication | 2023 |
| Cebil Ltd | Manufacturing | 2019 |
| Cedar Crest Investment Limited | Real estate | 2026 |
| Cee's Home Ltd | Wholesale & retail | 2020 |
| Cegrafinco Limited | Professional & scientific | 2026 |
| CEL Trading Services Ltd | Professional & scientific | 2021 |
| Celer Design Limited | Administrative & support | 2026 |
| Centaur BIO Limited | Professional & scientific | 2023 |
| Central Fishponds Ltd | Construction | 2000 |
| Centre for Educators of Bilingual & Multilingual Learners Ltd | Education | 2018 |
| Centre for Equity and Systemic Inclusion Ltd | Education | 2025 |
| CEO Auto Ltd | Wholesale & retail | 2026 |
| CEP Advisory Ltd | Professional & scientific | 2020 |
| Cepheus Consultancy Limited | Information & communication | 2022 |
| Ceres Innovation Limited | Professional & scientific | 2020 |
| Cermatpro Limited | Manufacturing | 2015 |
| Ceros London Limited | Financial services | 2025 |
| Certain Futures CIC | Education | 2024 |
| Certax Accounting Canterbury Ltd | Professional & scientific | 2018 |
| Certax Property Tax Specialists Ltd | Professional & scientific | 2022 |
| Ceylon Palm Ltd | Manufacturing | 2025 |
| CF Software Ltd | Information & communication | 2015 |
| CG LT Consultancy Limited | Hospitality | 2017 |
| CG Topco Limited | Administrative & support | 2024 |
| Chalk & SON Limited | Transport & logistics | 2014 |
| Chalkhill Farm Youth Activities Limited | Health & social care | 2007 |
| Chance and Skill Limited | Wholesale & retail | 2016 |
| Chandler & Dunn Limited | Agriculture & fishing | 1954 |
| Chandler Property Corporation Limited | Real estate | 1996 |
| Chandler Securities Limited | Financial services | 1991 |
| Chandor Hairstylists Ltd | Other services | 2003 |
| Change Corp Limited | Professional & scientific | 2018 |
| Channelled Investments | Financial services | 2026 |
| Chantry Court (Canterbury) Limited | Hospitality | 1992 |
| Chaos Collectibles Ltd | Wholesale & retail | 2026 |
| Chaps Barber Shop Ltd | Other services | 2015 |
| Chapter Zero Limited | Other services | 2019 |
| Chapters Community Arts CIC | Wholesale & retail | 2026 |
| Chapters of Sturry Ltd | Hospitality | 2023 |
| Charcoal Farm Holdings Limited | Real estate | 2022 |
| Chardikala Studios Ltd | Information & communication | 2025 |
| Chargeuk (Trade Association) Limited | Construction | 2024 |
| Charis Health Limited | Professional & scientific | 2007 |
| Charisma Developments Holdings Limited | Financial services | 2026 |
| Charisma Developments Ltd | Construction | 2020 |
| Charity Digital Trust | Administrative & support | 2009 |
| Charlesworth Scaffolding Limited | Construction | 2017 |
| Charliam Ltd | Real estate | 2024 |
| Charlie Osborne Limited | Information & communication | 2018 |
| Charlottes Web (2019) Limited | Wholesale & retail | 2019 |
| Chartech Ltd | Professional & scientific | 2025 |
| Chartered Financial Advice Ltd | Financial services | 2007 |
| Chartham Healthcare Ltd | Health & social care | 2016 |
| Chartham House Ltd | Professional & scientific | 2024 |
| Chartham Marine Limited | Administrative & support | 2002 |
| Chartmore International Limited | Professional & scientific | 2016 |
| Chateau DE Dohem Limited | Hospitality | 2017 |
| Chatham Place Residents Management Company Ltd | Households | 2020 |
| Chatham Realty Ltd | Real estate | 2025 |
| Chaucer Farm Limited | Real estate | 2022 |
| Chaucer Farm South East Limited | Real estate | 2024 |
| Chaucer Farm Storage Limited | Transport & logistics | 2024 |
| Chaucer Newco Limited | Professional & scientific | 2020 |