| Conprodis Ltd | Professional & scientific | 2009 |
| Constant Change Limited | Information & communication | 2024 |
| Constantino Solutions Ltd | Construction | 2019 |
| Construction (Chester) Group Holdings Limited | Financial services | 2022 |
| Consult PF Limited | Information & communication | 1997 |
| Consultedd Ltd | Professional & scientific | 2026 |
| Consulting to Industry Limited | Professional & scientific | 1983 |
| Consumer Credit Association (UK) Limited | Professional & scientific | 2019 |
| Consumer Recreation Services Ltd | Professional & scientific | 2013 |
| Contemporary Chester Ltd | Wholesale & retail | 2025 |
| Contemporary Concept Care Limited | Health & social care | 2020 |
| Contemporary Kitchens Limited | Wholesale & retail | 2007 |
| Contract Auto Component Remanufacturers Limited | Manufacturing | 1994 |
| Control Line Ltd | Professional & scientific | 2003 |
| Control of Work & Safety Consultants Limited | Mining & quarrying | 2022 |
| Controlled Network Systems Limited | Information & communication | 1997 |
| Converge Management Ltd | Professional & scientific | 2019 |
| Cook Construction & Landscapes Ltd | Administrative & support | 2024 |
| Coolearth Limited | Education | 2006 |
| Cooper Dennison Ltd | Financial services | 2024 |
| Cooper Dennison Property Holdings Limited | Real estate | 2024 |
| Cooper Harrand Limited | Construction | 2003 |
| Cooper Noble Care Ltd | Health & social care | 2014 |
| Coopers (Chester) Limited | Professional & scientific | 2015 |
| Coperion 01185424 Ltd | Administrative & support | 1974 |
| Coperion K-Tron Great Britain Limited | Manufacturing | 1987 |
| Copland 113 Ltd | Real estate | 2023 |
| Copper Mountain Ltd | Administrative & support | 2016 |
| Coppinger Livestock Limited | Agriculture & fishing | 2015 |
| Copplestones Developments Ltd | Construction | 2020 |
| Corazon Living Ltd | Real estate | 2025 |
| Cordon Associates Limited | Real estate | 2014 |
| Core 9 Training Solutions Ltd | Education | 2025 |
| Core Computers and Websites Limited | Information & communication | 2022 |
| Core Electrical NW Limited | Construction | 2023 |
| Core Fitness & Wellness Limited | Arts & recreation | 2015 |
| Core Space Renovations Ltd | Construction | 2025 |
| Core Staunton Limited | Real estate | 2016 |
| Corfton Developments Limited | Construction | 2019 |
| Corndrive Limited | Financial services | 1992 |
| Cornell Building RTM Company Ltd | Households | 2022 |
| Cornerhouse Chester Limited | Hospitality | 2016 |
| Cornerstone Builders Limited | Construction | 2003 |
| Cornes Properties Limited | Construction | 2021 |
| Cornwall Street Property Ltd | Hospitality | 2025 |
| Corporate Project Services Ltd | Construction | 2018 |
| Corporate Speak Limited | Professional & scientific | 2002 |
| Corr Imaging Limited | Health & social care | 2019 |
| Corsica Studios Ventures Limited | Arts & recreation | 2024 |
| Cosmetic Beauty Clinic Pro Ltd | Other services | 2024 |
| Cosmetic Safety Services Ltd | Professional & scientific | 2019 |
| Cosmetics LAB Limited | Manufacturing | 2022 |
| Cosmic Electrical Ltd | Construction | 2022 |
| Cosmitech UK Ltd | Wholesale & retail | 2025 |
| Cossec Consultancy Limited | Financial services | 2007 |
| Costelloes Ltd | Construction | 2013 |
| Costx Holistic Ltd | Other services | 2022 |
| Cosy Cask Sauna Ltd | Health & social care | 2024 |
| Cotswold Court Limited | Real estate | 1996 |
| Cottage Cars Private Hire Ltd | Transport & logistics | 2009 |
| Cottage Fields Management Company Limited | Households | 2015 |
| Cottingham Agencies Limited | Wholesale & retail | 1998 |
| Cotton Abbotts Ltd | Agriculture & fishing | 2023 |
| Country Barns and Homes Ltd. | Construction | 2000 |
| Countrywide Corporation Limited | Construction | 2014 |
| County Composting Ltd | Other services | 2024 |
| County Roofing (Chester) Limited | Construction | 2007 |
| Courtyard Barns Limited | Construction | 2016 |
| Couture Hairdressing Limited | Other services | 2013 |
| Coverwise Roofing Ltd | Construction | 2026 |
| Covo Limited | Real estate | 2025 |
| Cowley Solar Ltd | Construction | 2024 |
| Cowlyn Property Management Ltd | Real estate | 2019 |
| Cowmanager UK Ltd | Administrative & support | 2025 |
| CP Offshore Ltd | Construction | 2013 |
| CP Prestige Plastering & Renovations Ltd | Construction | 2022 |
| CPC Surveys Ltd | Construction | 2016 |
| CPD Works Limited | Professional & scientific | 2005 |
| Cphk Limited | Hospitality | 2024 |
| CPO Property Group Ltd | Real estate | 2025 |
| CPS Equipment Ltd | Wholesale & retail | 2024 |
| CPW Surveyors Limited | Professional & scientific | 2015 |
| Craft and Connect Limited | Education | 2023 |
| Cranberry Point Residents Company Limited | Households | 2007 |
| Crane Bank Garages Limited | Wholesale & retail | 2002 |
| Crane Bank Limited | Administrative & support | 2002 |
| Crate Minds IT Ltd | Information & communication | 2025 |
| Crave Nation Ltd | Hospitality | 2025 |
| Crawford & Co. Limited | Construction | 2012 |
| Crawford Lifestyles Ltd | Public administration | 2021 |
| CRC (2018) Limited | Other services | 2018 |
| Creatif Architectural Products Limited | Professional & scientific | 2010 |
| Creative Counsellors Community CIC | Health & social care | 2021 |
| Creative Counsellors Training & Consultancy Ltd | Health & social care | 2018 |
| Creative Golf Development Ltd | Administrative & support | 2021 |
| Creative Play (UK) Limited | Manufacturing | 1994 |
| Creative Property Holdings Limited | Real estate | 2007 |
| Creative Realisation Limited | Extraterritorial | 1995 |
| Creative Smart Investments Limited | Real estate | 2024 |
| Creature Hill Ltd | Administrative & support | 2019 |