| Cdms Sub-Surface Engineering Ltd | Construction | 2014 |
| CDR Global Limited | Information & communication | 2021 |
| Cecil Court Management Company (Harrogate) Limited | Households | 2004 |
| Cecil MAY Limited | Real estate | 2021 |
| Cecil Smart Limited | Professional & scientific | 2016 |
| Cedar Cavendish Limited | Professional & scientific | 2016 |
| Cedar Farm Practice Ltd | Professional & scientific | 2006 |
| Cedar GB Ltd | Professional & scientific | 2009 |
| Cedar Property Developments Ltd | Professional & scientific | 1999 |
| Cedar Rural Developments Limited | Construction | 2012 |
| Cedarwood Process Engineering Services Limited | Professional & scientific | 2007 |
| Ceejay UK Limited | Manufacturing | 2002 |
| Celebration Industries & Arts Ltd | Information & communication | 2023 |
| Celeste Overseas Associaiton Limited | Administrative & support | 2017 |
| Celkom Limited | Transport & logistics | 2015 |
| Celkom Warehousing Ltd | Transport & logistics | 2024 |
| Cellhire (Holdings) Limited | Professional & scientific | 1994 |
| Cellhire Group Limited | Information & communication | 2007 |
| Cellhire International Limited | Professional & scientific | 1989 |
| Cellhire Limited | Information & communication | 1987 |
| Celtic Capital FG Limited | Real estate | 2024 |
| Celtic Dynamics Engineering UK Ltd | Professional & scientific | 2025 |
| Celtic Routes Ltd | Transport & logistics | 2020 |
| Celtic Scaffolding York Ltd | Construction | 2015 |
| Cemtec Construction Ltd | Construction | 2003 |
| Censony Ltd | Information & communication | 2022 |
| Central Bark Yorkshire Ltd | Other services | 2023 |
| Central Body Repairs (York) Limited | Wholesale & retail | 2013 |
| Central Garage ARC Limited | Wholesale & retail | 2013 |
| Central Garage Holdings Ltd | Professional & scientific | 2024 |
| Central Garage Welburn Limited | Wholesale & retail | 2021 |
| Centralstate Limited | Real estate | 1995 |
| Centre for Global Education, York | Education | 2005 |
| Centre for Orthopaedic Research and Education Limited | Education | 2024 |
| Centre Pizza (Moore) Limited | Hospitality | 2025 |
| Centurion Square Residents Association Limited | Households | 2004 |
| Century Rise (Emersons Green) Management Company Limited | Households | 2017 |
| Cepec Career Management Limited | Professional & scientific | 2006 |
| CER Technologies Limited | Professional & scientific | 2020 |
| Certain Ltd | Professional & scientific | 2023 |
| Certibuild Ltd | Other services | 2019 |
| CES Collier Engineering Services Ltd | Professional & scientific | 2022 |
| CES Electrical Services Ltd | Construction | 2015 |
| Ceutiqa Ltd | Professional & scientific | 2015 |
| Cfrz Ltd | Real estate | 2020 |
| CG Building & Restoration Limited | Construction | 2013 |
| CG Minsterview Ltd | Real estate | 2025 |
| CGE Solutions Ltd | Construction | 2019 |
| Cges Northern Ltd | Construction | 2024 |
| Cgnu Life Assurance Limited | Professional & scientific | 1927 |
| CGT Accountancy Limited | Professional & scientific | 2024 |
| CH Planning & Design Ltd | Professional & scientific | 2019 |
| CH4 Strategies Ltd | Professional & scientific | 2025 |
| Chadwick Decorators Limited | Other services | 2014 |
| Chadwick Park (Knaresborough) Management Company Limited | Households | 2006 |
| Chadwicks Surveyors Limited | Professional & scientific | 2004 |
| Challenger Research Ltd | Information & communication | 2025 |
| Challis Transport Limited | Transport & logistics | 2018 |
| Chaloner Pond Wild Swimming & Well-Being Ltd | Other services | 2024 |
| Chamonix Property Investments Limited | Real estate | 2021 |
| Champers for Campers Ltd | Hospitality | 2021 |
| Chancelong Property Management Limited | Households | 1994 |
| Chancery Park (Exning) Residents Management Company Limited | Households | 2022 |
| Chancery Rise Management Company Limited | Households | 1998 |
| Change Accountants Ltd | Professional & scientific | 2016 |
| Changing Perspectives Ltd | Professional & scientific | 2020 |
| Chantry Vets Limited | Extraterritorial | 2016 |
| Chao Phraya Limited | Extraterritorial | 2019 |
| Chapeaux Ltd | Professional & scientific | 2015 |
| Chapel Business Consulting Limited | Information & communication | 2012 |
| Chapel Business Services Ltd | Professional & scientific | 2013 |
| Chapel Close (Marton LE Moor) Management Company Limited | Households | 2025 |
| Chapel Green (Herstmonceux) Management Company Limited | Households | 2025 |
| Chapel Kitchens Limited | Manufacturing | 2018 |
| Chapmans Bodycraft Limited | Transport & logistics | 2001 |
| Chapter House Preparatory School Limited | Other services | 1983 |
| Chapterville Limited | Information & communication | 2022 |
| Characters Property Limited | Real estate | 2004 |
| Charcoal Communications Limited | Professional & scientific | 2004 |
| Chargeback Ltd | Financial services | 2025 |
| Charlee X Ltd | Wholesale & retail | 2024 |
| Charles Adam Developments Ltd | Construction | 2013 |
| Charles Alexander Jewellery Ltd | Manufacturing | 2021 |
| Charles Church Civil Engineering Limited | Extraterritorial | 1968 |
| Charles Church Developments Limited | Construction | 1974 |
| Charles Church Essex Limited | Extraterritorial | 1986 |
| Charles Church Estates Limited | Extraterritorial | 1986 |
| Charles Church Holdings PLC | Professional & scientific | 1972 |
| Charles Church Housing Limited | Extraterritorial | 1986 |
| Charles Church Investment Properties Limited | Extraterritorial | 1982 |
| Charles Church Kent Limited | Extraterritorial | 1988 |
| Charles Church Limited | Extraterritorial | 1966 |
| Charles Church London Limited | Extraterritorial | 1986 |
| Charles Church Management Limited | Extraterritorial | 1974 |
| Charles Church Partnership Homes Limited | Extraterritorial | 1981 |
| Charles Church Residential Developments Limited | Extraterritorial | 1963 |
| Charles Church South East Limited | Extraterritorial | 1985 |
| Charles Church Southern Limited | Extraterritorial | 1983 |
| Charles Church Thames Valley Limited | Extraterritorial | 1981 |
| Charles Church Trading Limited | Extraterritorial | 1973 |