| Capital City Limited | Professional & scientific | 1994 |
| Capital Construction Midlands Ltd | Real estate | 2003 |
| Capital Properties Midlands Ltd | Real estate | 2025 |
| Car Finance Advisers Limited | Financial services | 2017 |
| Caravan Accessories Limited | Extraterritorial | 2017 |
| Carbon Harvest SCI & Tech Co., Ltd | Extraterritorial | 2019 |
| Care Weller Limited | Administrative & support | 2015 |
| Carl Clarke Limited | Information & communication | 2026 |
| Carter Electrical Warwickshire Limited | Construction | 2023 |
| Casey Carpentry & Building Services Limited | Manufacturing | 2022 |
| Castle Green Lease Ltd | Hospitality | 2023 |
| Castle Gymnastics Club Limited | Arts & recreation | 2014 |
| Castle Homes Estates Limited | Construction | 2019 |
| Castle Homes Estates Properties Limited | Real estate | 2023 |
| Castle Homes Kenilworth Limited | Construction | 2022 |
| Castle Homes of Warwick Developments Ltd | Construction | 2018 |
| Castle Homes of Warwick Limited | Construction | 1997 |
| Castle Homes of Warwick Properties Limited | Real estate | 2017 |
| Castle Homes of Warwick Real Estate Ltd | Construction | 2001 |
| Castle Mortgages Limited | Financial services | 2026 |
| Castle Property Invest Ltd | Real estate | 2025 |
| Castleblue Development Ltd | Professional & scientific | 2020 |
| Caterpillar Crafts Limited | Wholesale & retail | 2013 |
| CB Auto Investments Limited | Real estate | 2022 |
| CB Contract Services Ltd | Administrative & support | 2018 |
| CB Surveying Ltd | Construction | 2024 |
| Cbsl Tekstil Ltd | Extraterritorial | 2017 |
| CDA Automotive & Engineering Ltd | Wholesale & retail | 2020 |
| Ceag Lighting & Safety Limited | Professional & scientific | 2016 |
| Cebu Industrial Cleaning Limited | Administrative & support | 2022 |
| Cecil Construction Consultants Limited | Professional & scientific | 2017 |
| Cedar Brook Capital Limited | Construction | 2021 |
| Cedar Brook Nether Westcote SPV Limited | Construction | 2022 |
| Cedar Brook Park Road Campden Holdco SPV Ltd | Construction | 2026 |
| Cedar Brook Strategic Land Ltd | Construction | 2026 |
| Cedar Brook Willersey SPV Limited | Construction | 2024 |
| Cedars Group Limited | Financial services | 2026 |
| CEF Limited | Wholesale & retail | 2020 |
| CEK Services Limited | Administrative & support | 2015 |
| Celebrate 24/7 Ltd | Wholesale & retail | 2019 |
| Celia Christie Limited | Professional & scientific | 2013 |
| Celphard Technology Co., Ltd | Administrative & support | 2025 |
| Cemux Technology UK Ltd | Administrative & support | 2018 |
| Central 6 Grub Hub Ltd | Hospitality | 2022 |
| Central Chauffeur Services (UK) Limited | Transport & logistics | 2014 |
| Central Flower Sales (Coventry) Limited | Wholesale & retail | 1959 |
| Central Presentations Limited | Wholesale & retail | 2000 |
| Central Scanning Limited | Manufacturing | 2006 |
| Central Scanning Property Limited | Extraterritorial | 2010 |
| CFP Trading Limited | Wholesale & retail | 2026 |
| CFT International Ltd | Administrative & support | 2023 |
| CGS Family Investment Company | Administrative & support | 2015 |
| CHA CHA Spice Ltd | Hospitality | 2023 |
| Chance 2 BE Ltd | Administrative & support | 2019 |
| Changchun Marine Service Limited | Transport & logistics | 2021 |
| Charldan Ltd | Professional & scientific | 2026 |
| Charles Capital Ltd | Financial services | 2019 |
| Charles Ingle (Printers) Limited | Manufacturing | 1940 |
| Charles Peters Limited | Other services | 2009 |
| Charles Quinn Ltd | Construction | 2021 |
| Charles Ventures Ltd | Professional & scientific | 2019 |
| Charles Wood Consultants Limited | Professional & scientific | 2025 |
| Charlotte George Ltd | Real estate | 2006 |
| Chaville Ltd. | Wholesale & retail | 2022 |
| Chempharm Industrial Limited | Extraterritorial | 2017 |
| Cherry Biscuit Shepherds Huts Limited | Manufacturing | 2024 |
| Chic Property Limited | Households | 2017 |
| China Fancy International Trading Co., Limited | Wholesale & retail | 2019 |
| China Foton Motor Supply Chain Management Co., Ltd | Administrative & support | 2025 |
| China GTL Tools Group Ltd | Administrative & support | 2019 |
| China Tony International Trading Co., Limited | Administrative & support | 2024 |
| China Xinhai Machiney Co., Ltd | Wholesale & retail | 2019 |
| China-Base Logistics Co., Ltd | Wholesale & retail | 2019 |
| Chinatech Sourcing Limited | Manufacturing | 2006 |
| Chlorogen Ltd | Professional & scientific | 2024 |
| Cholead Ltd | Administrative & support | 2026 |
| Choosylearner Ltd | Manufacturing | 2008 |
| Choyce Property and Letting Limited | Real estate | 2017 |
| Choyear Ltd | Administrative & support | 2026 |
| Chrimogen Ltd | Administrative & support | 2022 |
| Chris Riley Property Solutions Limited | Professional & scientific | 2026 |
| Chris Spence Services Ltd | Construction | 2023 |
| Chris&Nom Ltd | Hospitality | 2024 |
| Chuangbao Asia Pactific Co., Limited | Manufacturing | 2024 |
| CHW Developments Properties Limited | Real estate | 2021 |
| CIO Plus Limited | Information & communication | 2004 |
| City & Walbrook Group Limited | Financial services | 1984 |
| City and Walbrook (Nominees) Limited | Extraterritorial | 1984 |
| City Capital Limited | Administrative & support | 1994 |
| City Electrical Factors Limited | Wholesale & retail | 1938 |
| Civica Investments (Holdings) Limited | Real estate | 1958 |
| Civica Investments Limited | Extraterritorial | 1958 |
| CKN Technologies Limited | Health & social care | 2018 |
| Ckozaaa Group Ltd | Manufacturing | 2017 |
| Claraprint Technology Ltd | Administrative & support | 2020 |
| Claremont Technology Ltd | Professional & scientific | 2015 |
| Claricom Ltd | Professional & scientific | 2013 |
| Clarlab Co., Ltd. | Wholesale & retail | 2014 |
| Clarus Training and Facilitation Limited | Administrative & support | 2008 |
| Classic Bike Provence Ltd | Administrative & support | 2002 |