| Chase Broxbourne Residential Limited | Construction | 2019 |
| Chase Broxbourne School Limited | Construction | 2019 |
| Chase Bushey Limited | Construction | 2024 |
| Chase Capital Commercial Investments Limited | Financial services | 2017 |
| Chase Capital Commercial Investments N0.2 Limited | Financial services | 2025 |
| Chase Capital Digital Currency Limited | Financial services | 2025 |
| Chase Capital Digital Currency NO.2 Limited | Financial services | 2025 |
| Chase Capital Land Acquisitions Limited | Real estate | 2017 |
| Chase Cuffley NO 2 Limited | Construction | 2024 |
| Chase Enfield Limited | Construction | 2022 |
| Chase Estates Housing Limited | Construction | 2015 |
| Chase Herts (Holding) Limited | Construction | 2021 |
| Chase Islington Limited | Construction | 2024 |
| Chase Living Broxbourne Limited | Real estate | 2022 |
| Chase Living Limited | Real estate | 2022 |
| Chase New Homes (WGC) Limited | Construction | 2025 |
| Chase New Homes Limited | Construction | 2011 |
| Chase Park Farm Limited | Construction | 2024 |
| Chase Ruislip Limited | Construction | 2022 |
| Chase Thaxted Limited | Construction | 2023 |
| Chaseton Integrated Limited | Professional & scientific | 2018 |
| Cheap Fire Extinguishers Limited | Administrative & support | 2006 |
| Cheap First AID Limited | Administrative & support | 2006 |
| Cheap Group Limited | Administrative & support | 2006 |
| Chef Philli Ltd | Information & communication | 2021 |
| Chekalok Limited | Hospitality | 2022 |
| Chelsfield Care Limited | Construction | 2022 |
| Chemur Chemicals Ltd | Professional & scientific | 2024 |
| Cherry Childcare Limited | Education | 2013 |
| Chestnut House Kindergarten Limited | Education | 2004 |
| Child's Time Holdings Limited | Financial services | 2022 |
| Child's Time Ltd | Health & social care | 2005 |
| Chillcore Refrigeration and Air Conditioning Ltd | Construction | 2026 |
| Chintred Ltd | Health & social care | 2024 |
| Chromacloud Limited | Information & communication | 2013 |
| Chunkkernuts Limited | Professional & scientific | 2023 |
| Churchill Emsworth Asset Finance Limited | Financial services | 2021 |
| Chus IT Ltd | Information & communication | 2014 |
| Ciba Properties Limited | Construction | 2025 |
| Cipher Labz Ltd | Information & communication | 2022 |
| City Express Couriers Limited | Transport & logistics | 2018 |
| CK Plastering Services Ltd | Construction | 2025 |
| Claire Legal Limited | Professional & scientific | 2012 |
| Claremont Quarter Management Company Limited | Households | 2025 |
| Clark Audio Innovation Ltd | Manufacturing | 2021 |
| Clean of Herts Ltd | Other services | 2014 |
| Cleaning for Joy Ltd | Administrative & support | 2026 |
| Clear Pronunciation Ltd | Education | 2016 |
| Clearfocus MG Limited | Health & social care | 2019 |
| Clearpath Telecom Ltd | Information & communication | 2025 |
| Clements Executive Advice Ltd | Professional & scientific | 2023 |
| Click 4 Accounts Limited | Extraterritorial | 2012 |
| Clinisource Limited | Professional & scientific | 2010 |
| Clock Cricket CIC | Arts & recreation | 2022 |
| Cloe Lambert Animal Physiotherapy Ltd | Professional & scientific | 2026 |
| Cloud Network Services Ltd | Information & communication | 2021 |
| Clubhub Community Ltd | Information & communication | 2023 |
| Cm&S Consulting Ltd | Administrative & support | 2020 |
| CMG Medical Ltd | Health & social care | 2022 |
| CMH Catering Ltd | Hospitality | 2020 |
| CNH Trading Limited | Construction | 2013 |
| CNN Healthcare Ltd | Health & social care | 2021 |
| Coconuss Limited | Information & communication | 2004 |
| Codename-Nineteen Limited | Information & communication | 2023 |
| Colban Enterprises Limited | Construction | 2013 |
| Coldbar Limited | Wholesale & retail | 2019 |
| Cole Green Management Limited | Households | 2012 |
| Coleman Property and Development Ltd | Construction | 2022 |
| Coletta Doors Solutions Limited | Construction | 2011 |
| Colindale Lane Tyres Ltd | Wholesale & retail | 2015 |
| Collect+ Brand Limited | Other services | 2016 |
| Collins Haulage Limited | Transport & logistics | 2011 |
| Collins Land Limited | Real estate | 2024 |
| Collison Place Limited | Households | 2025 |
| Colonyweb Limited | Information & communication | 2019 |
| Combi Boilers Limited | Construction | 2003 |
| Comfort Food Kitchen Ltd. | Manufacturing | 2025 |
| Commercial Body Fittings Limited | Wholesale & retail | 1984 |
| Commercial Surface Cleaning Ltd | Administrative & support | 2024 |
| Community Welfare Ltd | Public administration | 2022 |
| Comoz Ltd | Other services | 2012 |
| Company Telecom Ltd | Information & communication | 2019 |
| Compass Workshops Ltd | Education | 2024 |
| Complete Business Limited | Professional & scientific | 2020 |
| Complete Plant Hire Limited | Administrative & support | 2012 |
| Complete Tenders Limited | Professional & scientific | 2015 |
| Complex Construction RO Ltd | Construction | 2016 |
| Compose Syntax Ltd | Professional & scientific | 2025 |
| Computex Services Limited | Professional & scientific | 2008 |
| Concoa Ltd | Professional & scientific | 2024 |
| Concrete Express Limited | Extraterritorial | 2011 |
| Condor & Falcons Ltd | Professional & scientific | 2020 |
| Connect Learning Group Holdings Ltd | Financial services | 2026 |
| Connect Learning Group Limited | Education | 2023 |
| Conscious With Coffee Ltd | Manufacturing | 2021 |
| Conscious With Coffee Roasters Ltd | Manufacturing | 2021 |
| Construction Access Systems Limited | Construction | 2010 |
| Construction Solutions Inc Ltd | Construction | 2023 |
| Cooke Estates Woodberry Park Limited | Real estate | 2013 |
| Cool-Engineering Services Ltd | Professional & scientific | 2025 |