| CGS Ground Services Ltd | Transport & logistics | 2022 |
| CGY Ltd | Real estate | 2026 |
| CGZ Payroll Services Limited | Professional & scientific | 2013 |
| Chaco Properties Ltd | Real estate | 2022 |
| Chadwell Barbers Limited | Other services | 2026 |
| Chadz Ltd | Administrative & support | 2022 |
| Chai Gorom Limited | Hospitality | 2020 |
| Chairo Collection Ltd | Wholesale & retail | 2019 |
| Chakra Healthcare Ltd | Health & social care | 2025 |
| Chalk Hill Partnership Ltd | Real estate | 2016 |
| Chalk Studios Ltd | Professional & scientific | 2010 |
| Chalutz Legal Limited | Professional & scientific | 2012 |
| Champ Chicken and Pizza Limited | Hospitality | 2026 |
| Chamukov Ltd | Wholesale & retail | 2021 |
| Chandler Systems Ltd | Information & communication | 2010 |
| Chandlers Place Maintenance Limited | Administrative & support | 2002 |
| Change Comms Ltd | Professional & scientific | 2024 |
| Change Solution Providers Ltd | Professional & scientific | 2022 |
| Channel Utilities Ltd | Energy | 2013 |
| Chard Nails & Beauty Limited | Other services | 2025 |
| Charizma Limited | Wholesale & retail | 2026 |
| Charlabelle Holdings Limited | Financial services | 2026 |
| Charlery Co. Ltd | Construction | 2019 |
| Charles Douse Limited | Information & communication | 2019 |
| Charles Ramsden Consultancy Services Limited | Construction | 2012 |
| Charles Ramsden Limited | Professional & scientific | 2026 |
| Charles Real Estate Limited | Real estate | 2003 |
| Charluxe Spa Limited | Other services | 2025 |
| Chart Joinery Ltd | Construction | 2020 |
| Charterhouse Concepts Limited | Information & communication | 2007 |
| Chas.Cook Properties (Enfield) Limited | | 1953 |
| Chase Cuts Limited | Other services | 2026 |
| Chase Family Church | Other services | 2012 |
| Chase Farm Hospital Management Company Limited | Real estate | 2025 |
| Chase Hall Investments Ltd | Real estate | 2022 |
| Chase Packaging Limited | Other services | 1985 |
| Chase Polythene Limited | Other services | 1994 |
| Chase Ridings Property Management Ltd | Real estate | 2013 |
| Chase Side Investments Limited | Financial services | 2017 |
| Chatham-Glyn Fabrics Limited | Wholesale & retail | 1982 |
| Chatsworth Green Limited | Wholesale & retail | 2017 |
| Chatterford Ltd | Extraterritorial | 2012 |
| Chaz Limited | Wholesale & retail | 2009 |
| CHE Zeaion Ltd | Information & communication | 2020 |
| Cheeky Chimpz Ltd | Health & social care | 2017 |
| Cheese Pizza Ltd | Hospitality | 2026 |
| Chef Delight Limited | Hospitality | 2014 |
| Chef Direct Ltd | Hospitality | 2019 |
| Chela Ltd | Manufacturing | 1992 |
| Chelebi Builders Ltd | Real estate | 2022 |
| Chelmer Financial Advice Limited | Financial services | 2003 |
| Chelmer Trading Limited | Wholesale & retail | 2020 |
| Chemayt Ltd | Wholesale & retail | 2025 |
| Cherished Chimpz Ltd | Education | 2020 |
| Cheryl's Nails Limited | Other services | 2021 |
| Chetty Consulting & Estates Ltd | Construction | 2021 |
| Chev Ltd | Health & social care | 2014 |
| Chianth UK Ltd | Health & social care | 2021 |
| Chiappa Future Limited | Households | 2017 |
| Chiappa,Limited | Manufacturing | 1919 |
| Chick Heaven Limited | Hospitality | 2026 |
| Chicken Boran Ltd | Hospitality | 2019 |
| Chidumebi Ltd | Health & social care | 2022 |
| Chief Catering Limited | Construction | 2020 |
| Chien Trinh Limited | Other services | 2022 |
| Chiko Cafe Limited | Hospitality | 2019 |
| Chikov Group Ltd | Construction | 2022 |
| Childminder Accountancy Services Ltd | Professional & scientific | 2014 |
| Chill City Ltd | Other services | 2022 |
| Chillingham Limited | Extraterritorial | 2002 |
| Chilotabianca Ltd | Construction | 2017 |
| China Kitchen EN3 Ltd | Hospitality | 2025 |
| Chingford Fine Dining Ltd | Hospitality | 2018 |
| Chinnery Close Management Company Limited | Households | 1986 |
| Chinocs Holdings Limited | Administrative & support | 2026 |
| Chinthurst Homes Ltd | Construction | 2020 |
| Chinthurst Interiors Ltd | Construction | 2020 |
| Chiota Ltd | Health & social care | 2018 |
| Chloe Beauty Limited | Other services | 2017 |
| Chloe Fanclub Limited | Other services | 2019 |
| Chloe's Beauty Ltd | Other services | 2025 |
| Choice Security Ltd | Administrative & support | 2018 |
| Chopstone Estates Management Ltd | Real estate | 2023 |
| Chos Multimedia Ltd | Manufacturing | 2020 |
| Chowdhury Business & Associates Limited | Wholesale & retail | 2025 |
| Chozas Limited | Real estate | 2007 |
| Chrestos Mission | Other services | 2002 |
| Chris & Sons Limited | Wholesale & retail | 1967 |
| Chris Charles Counselling Ltd | Public administration | 2020 |
| Chris Christofi Consultancy Limited | Professional & scientific | 2017 |
| Chris Christofi Property Limited | Real estate | 2024 |
| Chris Recovery Ltd | Hospitality | 2024 |
| Chris ROS Ltd | Information & communication | 2021 |
| Chrissy Ltd | Hospitality | 2025 |
| Christian Action Housing Special Projects Limited | Construction | 2005 |
| Christianah Carroll's Ministries Limited | Extraterritorial | 2013 |
| Christine Elizabeth Gooch Ltd | Extraterritorial | 2023 |
| Christopher Gallagher Limited | Construction | 2012 |
| Christos Hair & Beauty Ltd | Other services | 2026 |
| Chuffed Car Club Limited | Wholesale & retail | 2025 |