| Chatham Waters Ltd | Wholesale & retail | 2023 |
| Chelsfield Bakehouse Limited | Wholesale & retail | 2025 |
| Chelva Limited | Professional & scientific | 2019 |
| CHI Chai Limited | Wholesale & retail | 2022 |
| Chiara Digital Ltd | Professional & scientific | 2017 |
| Chillika Limited | Hospitality | 2024 |
| Chinese Performing Art Ltd | Arts & recreation | 2024 |
| Chippy Chipper Ltd | Hospitality | 2025 |
| Choice Residential Ltd | Real estate | 2013 |
| Christine's Occasion Wear Limited | Wholesale & retail | 2015 |
| Chrysalis Care Ltd | Administrative & support | 2002 |
| Cinque Ports Window Company Limited | Construction | 2009 |
| Civicare Solutions Ltd | Construction | 2025 |
| Civil and Structural Design Solutions Limited | Construction | 2012 |
| CJS Plumbing & Heating Kent Limited | Administrative & support | 2017 |
| Cjsm Services Limited | Information & communication | 2025 |
| CK Dreams Ltd | Real estate | 2017 |
| Ckadex Limited | Real estate | 2021 |
| CLA Constructions Ltd | Construction | 2022 |
| Claircom Services Limited | Information & communication | 2026 |
| Clancy Estates Ltd | Construction | 2020 |
| Classic Accountancy Services (UK) Ltd | Professional & scientific | 2010 |
| Classic Mortgages and Protections Ltd | Professional & scientific | 2019 |
| Classic Style 4U Ltd | Wholesale & retail | 2025 |
| Classic Villas Ltd | Administrative & support | 2023 |
| Cleancut Barber London Ltd | Other services | 2025 |
| Clearviewer Ltd | Administrative & support | 2025 |
| Cleopatra Beautypro Academy Ltd | Other services | 2020 |
| Clever Africans Ltd | Professional & scientific | 2025 |
| Cliden Construction (South East) Ltd | Administrative & support | 2018 |
| Cllc Ltd | Hospitality | 2025 |
| Cloud Analytics Limited | Information & communication | 2022 |
| Cloud Octet Ltd | Information & communication | 2018 |
| CLOUD9LIFE Thai Massage Limited | Other services | 2020 |
| CM Cleaning Services Ltd | Administrative & support | 2021 |
| CNT Associates Limited | Professional & scientific | 2003 |
| Co Brand Creatives Limited | Extraterritorial | 2021 |
| Coco Blox Limited | Real estate | 2023 |
| Cognitech Services Limited | Information & communication | 2026 |
| COH Property Consultants Limited | Real estate | 2018 |
| Colin Mose Car Sales Ltd | Wholesale & retail | 2023 |
| Colive Connect UK Ltd | Real estate | 2023 |
| Collinstown Consulting Limited | Professional & scientific | 2020 |
| Collinstown Contracting Limited | Financial services | 2007 |
| Color Management Limited | Real estate | 2021 |
| Colors International UK Ltd | Hospitality | 2025 |
| Comfort Ventures Limited | Manufacturing | 2007 |
| Compel Media Network Ltd | Professional & scientific | 2017 |
| Complete Interiors (Bexleyheath) Ltd | Construction | 2023 |
| Compliancemate Limited | Administrative & support | 2018 |
| Concept Nouv-Oh Limited | Hospitality | 2023 |
| Confrex Equipment Hire Limited | Administrative & support | 2026 |
| Connected Building Services Limited | Construction | 2013 |
| Conrad David Real Estates Limited | Construction | 2022 |
| Construction 6 Ltd | Construction | 2007 |
| Constructum Ltd | Professional & scientific | 2025 |
| Consult HR Solutions Limited | Administrative & support | 2023 |
| Consultant & Consultant Ltd | Professional & scientific | 2023 |
| Consulteam Ltd | Health & social care | 2025 |
| Contact Centre Recruiting Limited | Administrative & support | 2019 |
| Conxsports Business Club Limited | Administrative & support | 2025 |
| Cool Renewables Ltd | Construction | 2025 |
| Coopers Lettings & Management Limited | Real estate | 2009 |
| Coppersmith Creations Limited | Wholesale & retail | 2016 |
| Copy Cats Print & Signs Limited | Administrative & support | 2020 |
| Corbs Rigging Ltd | Construction | 2025 |
| Core Cafe Holdings Ltd | Real estate | 2025 |
| Core Digital Group Ltd | Information & communication | 2021 |
| Core Downham Ltd | Hospitality | 2024 |
| Core Sidcup Ltd | Hospitality | 2024 |
| Core Swiss Cottage Ltd | Hospitality | 2024 |
| Corilea Carpentry Ltd | Construction | 2007 |
| Cortland Properties Ltd | Real estate | 2025 |
| Country Brides UK Ltd | Wholesale & retail | 2020 |
| Countrywide Builders Ltd | Financial services | 2026 |
| Countrywide Enterprises Ltd | Wholesale & retail | 2019 |
| Courtney Wells Ltd | Real estate | 2020 |
| Covered by HIS Word Limited | Wholesale & retail | 2016 |
| CPO & Pest Control Operatives Ltd | Other services | 2019 |
| Crawlett Solutions Ltd | Information & communication | 2024 |
| CREE8 Studios Ltd | Professional & scientific | 2024 |
| Creodigitallab Limited | Manufacturing | 2025 |
| Crescent Care Group Limited | Health & social care | 2026 |
| Crescent Moon Consultancy Limited | Professional & scientific | 2024 |
| Cribs Charitable Trust | Education | 2006 |
| Crisan Hernane Ltd | Professional & scientific | 2016 |
| CRJ Utilities Ltd | Construction | 2019 |
| Crook LOG Legal Ltd | Professional & scientific | 2023 |
| Cryptec Ltd | Extraterritorial | 2024 |
| Crystal Car Hub Ltd | Wholesale & retail | 2019 |
| Crystar Support Services Limited | Health & social care | 2020 |
| CSP Technology Solutions Ltd | Information & communication | 2026 |
| CSW Plumbing & Heating Solutions Ltd | Construction | 2014 |
| Cuemargin Limited | Information & communication | 2018 |
| Cuong LTS Ltd | Administrative & support | 2020 |
| Cybersweet Ltd | Information & communication | 2021 |
| Cybrana Computing Ltd | Information & communication | 2005 |
| D & S Barbers Bexleyheath Ltd | Other services | 2021 |
| D & T Wise Limited | Wholesale & retail | 2003 |
| D JAY Property Services Limited | Construction | 2012 |