| C-Life Limited | Education | 1996 |
| CA Dermatology Limited | Health & social care | 2017 |
| Cadence Contracts Limited | Construction | 2016 |
| Cader Solicitors Limited | Professional & scientific | 2022 |
| Calixra Ltd | Professional & scientific | 2026 |
| CAM Interior Design Limited | Professional & scientific | 2017 |
| Camden Holt Management Company Limited | Real estate | 1985 |
| Camden Park Estate Limited | Households | 1995 |
| Cameron & Shaw Consultancy Ltd | Professional & scientific | 2014 |
| Canela Limited | Real estate | 2014 |
| Canvass Design Limited | Information & communication | 2021 |
| CAP X Solutions Limited | Professional & scientific | 2003 |
| Capagility Consulting Limited | Professional & scientific | 2016 |
| Capital Taxis Ltd | Transport & logistics | 2011 |
| Capulet Consulting Limited | Professional & scientific | 2019 |
| Carlean Property Management Limited | Real estate | 2009 |
| Carnot Systems Limited | Information & communication | 2012 |
| Caroline Leigh Ltd | Other services | 2025 |
| Carr International Services Limited | Professional & scientific | 2025 |
| Cassone Art Limited | Information & communication | 2010 |
| Castle Keepe Limited | Real estate | 2016 |
| Castledine Limited | Households | 1989 |
| Cator Associates Limited | Professional & scientific | 2002 |
| CB24 Developments Ltd | Real estate | 2022 |
| CBD Nationwide Distribution (UK) Ltd | Health & social care | 2019 |
| CC Bawn Limited | Manufacturing | 2025 |
| CD Business Services Limited | Professional & scientific | 2018 |
| CDA Global Limited | Health & social care | 2010 |
| Cedar Construction Consultants Ltd | Real estate | 2017 |
| Ceiling Partition Plastering Solutions Ltd | Construction | 2017 |
| Celbridge Limited | Real estate | 2005 |
| CELBRIDGE2 Limited | Construction | 2017 |
| Ceni Plumbing Ltd | Construction | 2014 |
| Centre Attractions Ltd | Professional & scientific | 1994 |
| Centuria Consulting Ltd | Professional & scientific | 2019 |
| Century Build & Design Ltd | Construction | 2026 |
| Cerapor Ltd | Construction | 2009 |
| Cezar Group Ltd | Construction | 2020 |
| Ch-Images Ltd | Professional & scientific | 2019 |
| Chamberlain Consulting Engineers Limited | Professional & scientific | 2024 |
| Chara Pastry House Ltd | Hospitality | 2025 |
| Charbell@ Ltd | Real estate | 2016 |
| Charles Rose Living Ltd | Real estate | 2023 |
| Charles Walters Music Ltd | Information & communication | 2015 |
| Charlotte Court Camden Grove Chislehurst Management Limited | Real estate | 1995 |
| Charlotte Saunders Limited | Other services | 2021 |
| Charter Consultancy Limited | Financial services | 1996 |
| Charter Finance Limited | Financial services | 1996 |
| Chase Lodge Stables Limited | Agriculture & fishing | 2004 |
| Chelsea Flowerwall Ltd | Administrative & support | 2020 |
| Chesil House Freehold Company Limited | Real estate | 2023 |
| Chesil House RTM Company Ltd | Real estate | 2015 |
| Chetna Consulting Ltd | Information & communication | 2016 |
| Chevender Residents Company Limited | Extraterritorial | 2010 |
| Cheyne Assets Ltd | Real estate | 2012 |
| Cheyne Properties Limited | Real estate | 1997 |
| Cheyne Property Estates Limited | Construction | 2011 |
| Cheyne Residential Limited | Real estate | 2021 |
| Cheyne Trustees Ltd | Real estate | 2020 |
| Chic ET Tralala Ltd | Wholesale & retail | 2023 |
| Chislehost Limited | Households | 2025 |
| Chislehurst Beauty Studio Ltd | Other services | 2020 |
| Chislehurst Bespoke Builders Ltd | Construction | 2024 |
| Chislehurst Bridal Ltd | Wholesale & retail | 2020 |
| Chislehurst Chiropractic Clinic Limited | Health & social care | 2010 |
| Chislehurst Clinic Limited | Health & social care | 2012 |
| Chislehurst Door Company Limited | Manufacturing | 2022 |
| Chislehurst Drainage Services Limited | Construction | 2019 |
| Chislehurst Gate (NO.3) Management Limited | Households | 1999 |
| Chislehurst Gate NO. 2 Management Limited | Real estate | 1994 |
| Chislehurst Healthcare Ltd | Health & social care | 2020 |
| Chislehurst Kitchens Limited | Wholesale & retail | 2015 |
| Chislehurst Podiatry Ltd | Health & social care | 2019 |
| Chislehurst Salon Limited | Other services | 2012 |
| Chislehurst Shoe Repairs Limited | Other services | 2015 |
| Chislehurst Thai Massage LLP | | 2023 |
| Chislehurst Wanderers FC Limited | Arts & recreation | 2022 |
| Chris Earls Ltd | Information & communication | 2024 |
| Christian Stuart Limited | Construction | 2016 |
| Chrystallion Limited | Households | 1989 |
| CID Environmental Ltd | Administrative & support | 2016 |
| Cinque C Limited | Financial services | 2025 |
| City FM and Cleaning Services Ltd | Administrative & support | 2020 |
| Cityiq Limited | Information & communication | 1997 |
| Clawdd Consulting Ltd | Information & communication | 2026 |
| Clear Synergy Ltd | Arts & recreation | 2018 |
| Clearview Advisory Partners Limited | Information & communication | 2025 |
| Cliff Terrace Ltd | Real estate | 2018 |
| CM Billing Limited | Professional & scientific | 2023 |
| Coactivate UK Limited | Administrative & support | 2025 |
| Cobalt (Bromley South) Limited | Real estate | 2008 |
| Cobalt (Chislehurst) LLP | | 2011 |
| Cobalt 2021 Limited | Real estate | 2021 |
| Cobalt Apex Limited | Real estate | 2013 |
| Cobalt Beckenham Gate Limited | Real estate | 2026 |
| Cobalt Eltham Limited | Real estate | 2024 |
| Cobalt Gravesend Limited | Real estate | 2020 |
| Cobalt Limited | Real estate | 1984 |
| Cobalt Ventures Limited | Real estate | 2023 |
| Code & INK Ltd | Information & communication | 2020 |