| Celesta Homecare Services Limited | Health & social care | 2024 |
| CELL4PHONES Ltd | Wholesale & retail | 2025 |
| CEM (UK) Limited | Construction | 2003 |
| CEM Consultancy Services Limited | Professional & scientific | 2015 |
| Cenac Mckenzie Real Estate Ltd | Real estate | 2022 |
| Cenator Limited | Financial services | 2006 |
| Centexmedia Ltd | Information & communication | 2025 |
| Centicom Ltd | Information & communication | 2021 |
| Central City Bakeries Limited | Real estate | 1968 |
| Central Management and Development Services Limited | Real estate | 2026 |
| Central Management Property Services Limited | Real estate | 2023 |
| Central Park Estates Limited | Real estate | 1944 |
| Central Park Investments Limited | Real estate | 1963 |
| Centre for Business & Economic Research Ltd | Information & communication | 2006 |
| Centrum Auto London Ltd | Wholesale & retail | 2026 |
| Cerion Consulting Group Ltd | Professional & scientific | 2025 |
| Cerpan Limited | Professional & scientific | 2011 |
| Certus Trading Limited | Administrative & support | 2020 |
| Cerulean Dancer Ltd | Professional & scientific | 2024 |
| Cerulean Trading & Commerce Limited | Wholesale & retail | 2023 |
| Cetina Construction Ltd | Construction | 2019 |
| CEY4HUB Limited | Wholesale & retail | 2022 |
| CFK Properties Limited | Real estate | 2019 |
| CFP Architects Limited | Professional & scientific | 2012 |
| CGX Solutions Limited | Professional & scientific | 2023 |
| CHA Cha's Chicken Ltd | Hospitality | 2018 |
| Chaawa Limited | Hospitality | 2025 |
| Chabad of Greenwich & Docklands Limited | Other services | 2020 |
| Chadron Limited | Professional & scientific | 1989 |
| Chai International Limited | Wholesale & retail | 2024 |
| Chai Thali Indian Limited | Hospitality | 2025 |
| Chai Thali Restaurant Limited | Hospitality | 2024 |
| Chaim Steel Limited | Health & social care | 2019 |
| Chaimaa Company Ltd | Transport & logistics | 2019 |
| Chalestra Limited | Information & communication | 1998 |
| Chalil's Retail UK Limited | Wholesale & retail | 2022 |
| Chalkgate Limited | Hospitality | 1978 |
| Chalklen Properties Ltd | Real estate | 2022 |
| Chana Kanzen Consultancy Ltd | Professional & scientific | 2023 |
| Chancery Dental Corby Limited | Health & social care | 2023 |
| Chancery Dental Ltd | Health & social care | 2006 |
| Chand Consultancy Limited | Real estate | 1997 |
| Chandos Parade Right to Manage Company Limited | Households | 2012 |
| Charcoal Edgware Limited | Hospitality | 2019 |
| Charcom Limited | Professional & scientific | 2025 |
| Chard Laundry Limited | Other services | 2024 |
| Charles Glausiusz Ltd | Professional & scientific | 2026 |
| Charles Herisson Ltd | Administrative & support | 2010 |
| Charmed Offensive Ltd | Manufacturing | 2018 |
| Chartered Engineering Solutions Limited | Professional & scientific | 2007 |
| Charwick Limited | Professional & scientific | 2025 |
| Chatt Realty Ltd | Real estate | 2022 |
| Chavas Salon Ltd | Other services | 2023 |
| CHC Healthcare (UK) Limited | Wholesale & retail | 2021 |
| Cheeky Island Ltd | Real estate | 2025 |
| Chef Javad Limited | Hospitality | 2024 |
| Chef Leung Ltd | Hospitality | 2025 |
| Chef RAM Limited | Hospitality | 2025 |
| Cheilia TV Limited | Information & communication | 2025 |
| Chelmsford Assets Limited | Real estate | 2025 |
| Chelsea Estates ( London ) Ltd | Real estate | 2019 |
| Chembridge Trading Ltd | Wholesale & retail | 2025 |
| Chemimed Healthcare Limited | Manufacturing | 2017 |
| Chen&Sons Building Ltd | Construction | 2016 |
| Chengshao Building Limited | Construction | 2021 |
| Cherry Dental Ltd | Health & social care | 2018 |
| Cherry Mesh Ltd | Professional & scientific | 2023 |
| Cherry Tree Property Management Limited | Households | 2005 |
| Cherry Tree Tuition Ltd | Administrative & support | 2021 |
| Cherrywood Design & Build Ltd | Construction | 2024 |
| Cherubs Care Ltd | Health & social care | 2021 |
| Chester Mill Limited | Hospitality | 2017 |
| Chestnut Education Group Limited | Administrative & support | 2017 |
| Chetnaa S Hallai Ltd | Real estate | 2024 |
| Chetwynd Properties Limited | Real estate | 1989 |
| Chevalier Investments Limited | Real estate | 2025 |
| Chia J Construction Ltd | Construction | 2026 |
| Chic LE Frique Limited | Wholesale & retail | 2017 |
| Chick and Smash Ltd | Hospitality | 2024 |
| Chickburg Limited | Hospitality | 2025 |
| Chickeeza Limited | Hospitality | 2025 |
| Chicken Supreme Limited | Hospitality | 2026 |
| Chicken Tally Group Ltd | Hospitality | 2026 |
| Chicken Tally Ltd | Hospitality | 2026 |
| Chickster Ltd | Hospitality | 2025 |
| Chilli.Inc Ltd | Manufacturing | 2018 |
| Chiltern Hill Close Limited | Households | 2019 |
| Chiltern House Owners Ltd | Real estate | 2022 |
| Chilton Properties Limited | Real estate | 2006 |
| China Chef (Feltham) Limited | Hospitality | 2008 |
| Chinatown Restaurant (London) Ltd | Hospitality | 2017 |
| Chintagunta Limited | Information & communication | 2015 |
| Chiozi & Co Ltd | Health & social care | 2014 |
| Chipperfield House Limited | Real estate | 2021 |
| Chiqano's Limited | Hospitality | 2025 |
| Chiswick Renovations & Building Ltd | Construction | 2015 |
| Chiswick Tower Limited | Real estate | 2022 |
| Chiyofast Holdings Ltd | Transport & logistics | 2026 |
| Chiyofast Services Ltd | Information & communication | 2018 |
| CHJ Accountants Limited | Professional & scientific | 2009 |