| Chase William Ltd | Real estate | 2019 |
| Chase William Residential Limited | Real estate | 2020 |
| Chasefield (Construction) Limited | Construction | 1991 |
| Chashauk Ltd | Hospitality | 2019 |
| Chasing Home Film Limited | Professional & scientific | 2024 |
| Chassay Consultancy Ltd | Other services | 2015 |
| Chatsworth Building and Renovations Ltd | Construction | 2025 |
| Chatsworth Lodge Freehold Company Limited | Households | 2017 |
| Chatsworth Place Management Limited | Households | 1985 |
| Chatterton Barbers Ltd | Other services | 2023 |
| Chatterton Flavour Ltd | Hospitality | 2025 |
| Chatterton Laundry Services Ltd | Other services | 2020 |
| Chatterton News (UK) Limited | Wholesale & retail | 2005 |
| Chauffeur Service London Ltd | Transport & logistics | 2026 |
| CHE Bella London Limited | Other services | 2023 |
| Check Mate London Limited | Other services | 2019 |
| Checkmusicpro Ltd | Information & communication | 2026 |
| Checkprovide Limited | Information & communication | 2012 |
| Cheeky Goat Ltd | Hospitality | 2025 |
| Cheers Piers Hospitality Ltd | Hospitality | 2024 |
| Cheeva Thai Ltd | Other services | 2021 |
| Chef Rulo Limited | Hospitality | 2019 |
| Chelbmyster Solutions Ltd | Information & communication | 2019 |
| Chelone Swim School Ltd | Education | 2025 |
| Chelsea Business Machines Limited | Administrative & support | 1978 |
| Chelsea Mews (1-5) RTM Company Limited | Households | 2023 |
| Chelsea Mews (11-18) RTM Company Limited | Households | 2023 |
| Chelsea Mews (6-10) RTM Company Limited | Households | 2023 |
| Cherry Carpets Ltd | Construction | 2012 |
| Cherry Orchard Road Residents Limited | Households | 2005 |
| Cherry Picker Fast Limited | Construction | 2024 |
| Cherry Virtual and Cyber Solutions Limited | Public administration | 2024 |
| Chessboard Limited | Financial services | 1980 |
| Chester Court Limited | Households | 1986 |
| Chez Joelle Ltd | Hospitality | 2023 |
| Chia Naturally Healthy Ltd. | Hospitality | 2015 |
| Chick'N Shop Limited | Hospitality | 2025 |
| Chikitobabe Ltd | Wholesale & retail | 2023 |
| Chikompu Ltd | Information & communication | 2025 |
| Child and Youth Partnerships | Health & social care | 2021 |
| Childaid to Eastern Europe Ltd | Administrative & support | 1980 |
| Chiltern and Cheviot RTM Company Ltd | Households | 2018 |
| Chilterns Management Company (Bromley) Limited | Hospitality | 1967 |
| China Europe Culture Centre Limited | Education | 2018 |
| China HEN Ltd | Arts & recreation | 2013 |
| Ching Bong Limited | Administrative & support | 2026 |
| Chinic Limited | Real estate | 2022 |
| Chirambattu Limited | Information & communication | 2012 |
| Chiron Estates Limited | Real estate | 2026 |
| Chisledent Limited | Health & social care | 2020 |
| Chislehurst Consultancy Ltd | Professional & scientific | 2024 |
| Chislehurst Electrical Contractors Limited | Extraterritorial | 2010 |
| Chislehurst Road Management Company Limited | Real estate | 2000 |
| CHJ (UK and Europe) Ltd | Financial services | 2013 |
| Chohole Court (Norstead Place) Residents Management Company Limited | Households | 2009 |
| Choice Lift Services Ltd | Manufacturing | 2026 |
| Choicepurpose Property Management Limited | Households | 1996 |
| Chowdhury Indian Restaurant Ltd. | Hospitality | 2015 |
| Chris Atkinson PR Ltd | Professional & scientific | 2025 |
| Chris Curran Studio Ltd | Professional & scientific | 2021 |
| Chris Kendall Associates Limited | Professional & scientific | 1996 |
| Chris Lord Consulting Ltd | Professional & scientific | 2012 |
| Chris Sawh Limited | Real estate | 2024 |
| Chris the Chiro Ltd | Health & social care | 2023 |
| Chrissychocs Limited | Manufacturing | 2009 |
| Christian Charles Ltd | Information & communication | 2015 |
| Christian Cleaning Limited | Administrative & support | 2019 |
| Christian Prison Resourcing | Other services | 2010 |
| Christiana Limited | Health & social care | 2014 |
| Christie Events Limited | Administrative & support | 2025 |
| Christies Beauty Salon Limited | Other services | 2018 |
| Christilor Ltd | Health & social care | 2023 |
| Christopher Scully Limited | Professional & scientific | 2003 |
| Christy Health Limited | Health & social care | 2021 |
| Chronos IP Limited | Professional & scientific | 2019 |
| Chrysalis Management Ltd | Financial services | 2016 |
| Church Sound Experts CIC | Information & communication | 2025 |
| Church Walk RTM Company Limited | Households | 2008 |
| Churches in Communities International | Other services | 2010 |
| Churchfield Road (Freehold) Limited | Households | 2024 |
| Churchill Education Services Limited | Hospitality | 2018 |
| Churchill Fire & Security Ltd | Administrative & support | 1996 |
| Churchill Fire Systems Ltd | Administrative & support | 2012 |
| Churchill Security Systems Ltd | Administrative & support | 2023 |
| Churchman Training Ltd | Professional & scientific | 2011 |
| Chza Ltd | Information & communication | 2021 |
| Ciaroshi Communications Ltd | Professional & scientific | 2026 |
| Cinaconsult Limited | Information & communication | 2015 |
| Cinderellas Maids Ltd | Administrative & support | 2015 |
| Cinque Ports GIN Ltd | Manufacturing | 2023 |
| Cintra Estates Ltd | Real estate | 2012 |
| CIQ Global Ltd | Professional & scientific | 2023 |
| Circa Core Ltd | Administrative & support | 2025 |
| Cissores Limited | Manufacturing | 2021 |
| CIT Global Ltd | Information & communication | 2006 |
| Citac Trading Company Limited | Wholesale & retail | 1991 |
| Citadel Court Residents Association Limited | Households | 1999 |
| Citi Electrical & Alarms Limited | Construction | 2012 |
| City Consulting Limited | Professional & scientific | 2023 |
| City Finishers Limited | Administrative & support | 2016 |