| C&M Scaffolding Solutions Ltd | Construction | 2025 |
| C&R Property Living Ltd | Administrative & support | 2025 |
| C&T Auctioneers and Valuers Ltd | Administrative & support | 2018 |
| C&T Construction&Property Management Limited | Construction | 2017 |
| C-Change Resources Limited | Extraterritorial | 2020 |
| C. B. Motors (Kent) Limited | Financial services | 1982 |
| C. R. Draughting Limited | Construction | 2007 |
| C. Scope International Limited | Manufacturing | 1958 |
| C.D.P. Environmental Limited | Administrative & support | 2009 |
| C.G Building Services of Surrey Ltd | Construction | 2021 |
| C.G.R. Construction Limited | Construction | 2005 |
| C.George Rail Services Ltd | Construction | 2020 |
| C.J. Cobbett Building Services Limited | Construction | 2008 |
| C.P Yacht Contracting Ltd | Professional & scientific | 2022 |
| C.S. Hoardings & Fencing Limited | Other services | 2008 |
| C21 Associates Limited | Public administration | 2014 |
| CA Sales and Marketing Services Ltd | Professional & scientific | 2020 |
| CAB 4 Ride Ltd | Transport & logistics | 2025 |
| Cabco Ashford Taxi Ltd | Transport & logistics | 2025 |
| Cabera Limited | Information & communication | 1998 |
| CAC Properties Ltd | Real estate | 2026 |
| Cache Link Ltd | Information & communication | 2018 |
| Cactus and Avocado Limited | Information & communication | 2021 |
| Cadcomp Limited | Professional & scientific | 2020 |
| Cade Engineering Limited | Professional & scientific | 2017 |
| Cade Management Limited | Households | 2011 |
| Cadlow Limited | Wholesale & retail | 2007 |
| Cadscope Limited | Professional & scientific | 2006 |
| Caerus Initiative Ltd | Extraterritorial | 2013 |
| Cafe & Grill Limited | Hospitality | 2020 |
| Cafe Delce Limited | Hospitality | 2010 |
| Caffe M Limited | Hospitality | 2025 |
| Caffe Madeleine Ltd | Hospitality | 2017 |
| Cage Waste Removal Limited | Water & waste | 2024 |
| Cahlon Ltd | Real estate | 2022 |
| Cain&Content Ltd | Information & communication | 2022 |
| Caitlyn Charles Properties Ltd | Real estate | 2026 |
| CAJ Contract Services (Kent) Limited | Administrative & support | 2018 |
| CAJ Contract Services Limited | Administrative & support | 2014 |
| Cake PR Ltd | Professional & scientific | 2017 |
| Cake Spot Limited | Other services | 2019 |
| Calamondin Ltd | Professional & scientific | 2020 |
| Calcutt Matthews WBZ Limited | Professional & scientific | 2018 |
| Caldecott Fostering Limited | Health & social care | 2010 |
| Calgarth Properties Limited | Administrative & support | 2003 |
| Calibre Cleaning Ltd | Administrative & support | 2006 |
| Calibre Cleaning Services Limited | Administrative & support | 1999 |
| Call Navigator Limited | Information & communication | 2005 |
| Callgas Limited | Construction | 2018 |
| Calmnest CIC | Health & social care | 2025 |
| Calvron Ltd | Financial services | 2026 |
| Camber Breaks Ltd | Hospitality | 2017 |
| Camber Club Ltd | Manufacturing | 2025 |
| Cambridge Tutor Academy Limited | Education | 2024 |
| Camel Heating Ltd | Construction | 2026 |
| Camelia&Jones Healthcare Limited | Health & social care | 2021 |
| Camgo Electrical Ltd | Construction | 2020 |
| Camier Groundwork Limited | Construction | 2002 |
| Camise Hair Salon Ltd | Other services | 2021 |
| Cammegh Limited | Administrative & support | 1999 |
| Campaign World Ltd | Other services | 2026 |
| Campbell 2021 Ltd | Arts & recreation | 2020 |
| Campbell Insurance Services Limited | Financial services | 1986 |
| Campbell Prime Estates Ltd | Real estate | 2026 |
| Camphill Consulting Services Ltd | Professional & scientific | 2025 |
| Campion Close Management Limited | Administrative & support | 2014 |
| Campton (Financial Services) Limited | Financial services | 1978 |
| Cana Consulting Limited | Professional & scientific | 2023 |
| Canacarib Ltd | Administrative & support | 2016 |
| Canal Farm Limited | Construction | 2022 |
| Canary Wharf Office Supplies Limited | Wholesale & retail | 2022 |
| Candid Health & Social Care Ltd | Health & social care | 2015 |
| Candida Halton Ltd | Health & social care | 2011 |
| Candy Property Developments Ltd | Real estate | 2022 |
| Candytape Limited | Professional & scientific | 1987 |
| Cane Property Limited | Real estate | 2022 |
| Canelec Limited | Construction | 2016 |
| Canford Accounting Services Limited | Professional & scientific | 2024 |
| Cangort Ltd | Construction | 2023 |
| Canine Safety and Management Limited | Other services | 2025 |
| Canmore Digital Limited | Information & communication | 2023 |
| Cannacine Limited | Agriculture & fishing | 2023 |
| Cannon Events 2 Limited | Professional & scientific | 2018 |
| Cannon Events Limited | Professional & scientific | 2018 |
| Canter Media Limited | Professional & scientific | 2025 |
| Canterbury Archers | Arts & recreation | 2015 |
| Canterbury Cider Limited | Manufacturing | 2020 |
| Canterbury Court, Ashford (Management) Limited | Households | 1970 |
| Canterbury DAB Limited | Information & communication | 2022 |
| Canterbury Developments (UK) Ltd | Construction | 2002 |
| Canterbury Pest Control Ltd | Professional & scientific | 2021 |
| Canterbury Rhythmic Gymnastics Ltd | Arts & recreation | 2025 |
| Cantium Foods Ltd | Wholesale & retail | 2021 |
| Cantium Homes Limited | Construction | 2025 |
| Cantium Scaffolding Limited | Construction | 2012 |
| Canton Kitchen (Charing) Limited | Hospitality | 2016 |
| CAP Enterprise (Kent) CIC | Professional & scientific | 2011 |
| Capduo Holdings Limited | Real estate | 2024 |
| Capes Refurbishments Limited | Construction | 2021 |
| Capital Auto Wash Ltd | Administrative & support | 2013 |