| Choseley Management Company Ltd | Other services | 2016 |
| Chrift Investments Ltd | Financial services | 2021 |
| Chris Bibb Independent Financial Advice Ltd | Financial services | 2012 |
| Chris Cook News Ltd | Information & communication | 2020 |
| Chris Grube Sailing Limited | Arts & recreation | 2013 |
| Chris J Jones Creative Ltd | Professional & scientific | 2014 |
| Chris Reading Associates Limited | Professional & scientific | 2019 |
| Chris Rowley Estates Limited | Real estate | 2024 |
| Chris Trans Ltd | Transport & logistics | 2025 |
| Chrisp Inc Limited | Professional & scientific | 2012 |
| Chrisp Solutions Ltd | Information & communication | 2015 |
| Christchurch Emporium Limited | Real estate | 2021 |
| Christchurch Nails Ltd | Other services | 2024 |
| Christie RAE Physiotherapy Limited | Public administration | 2025 |
| Christina Moncur Limited | Professional & scientific | 2017 |
| Christopher James Leslie Doran Limited | Extraterritorial | 2023 |
| Christopher Oliver Ltd | Professional & scientific | 2023 |
| Chroma Detailing Ltd | Administrative & support | 2024 |
| Chrome Cruisers Limited | Wholesale & retail | 2015 |
| Chrome Gemz Ltd | Other services | 2025 |
| Chrome Toad Ltd | Wholesale & retail | 2025 |
| Chronova Engineering Ltd | Manufacturing | 2022 |
| Chulli Pizza Ltd | Hospitality | 2026 |
| Chunky Rhino Ltd | Wholesale & retail | 2018 |
| Church Cottage Winterbourne Limited | Construction | 2011 |
| Church Energy Savings Consortium Limited | Energy | 1999 |
| Church Mews (Parkstone) Management Company Limited | Households | 1989 |
| Church of Scientology Mission of Dorset Ltd | Other services | 1986 |
| Church Road ASH X Management Limited | Households | 2016 |
| Churchill Business Park (Management) Limited | Households | 2023 |
| Churchill Industrial Park Limited | Construction | 2021 |
| Churchwood Homes Ltd | Real estate | 2026 |
| Chykarenza Properties Kernow Ltd | Manufacturing | 2025 |
| CI Sport Services Ltd | Health & social care | 2025 |
| Cian's Cupcake Toppers Ltd | Manufacturing | 2014 |
| Cicero Estates Limited | Real estate | 2017 |
| Cicero Land Ltd | Real estate | 2019 |
| Ciconia Design Ltd | Wholesale & retail | 2020 |
| CID Solutions Ltd | Wholesale & retail | 2016 |
| Ciderman Industries Ltd | Real estate | 2024 |
| Cienvita Ltd | Wholesale & retail | 2025 |
| Cinemadrame News & Media Ltd | Information & communication | 2025 |
| Cinolla Software Limited | Information & communication | 2003 |
| Cinth Ltd | Wholesale & retail | 2025 |
| Circle Trading Ltd | Professional & scientific | 2025 |
| Cirmex Ltd | Information & communication | 2022 |
| Cirrus Design Studio Ltd | Administrative & support | 2019 |
| Cirrus Systems Limited | Wholesale & retail | 2006 |
| Citadel Carpentry Ltd | Construction | 2021 |
| Citirose Ltd | Construction | 2025 |
| Citrus House Management Company Limited | Households | 2013 |
| City Boxing Camp Limited | Arts & recreation | 2021 |
| City Financial Models Ltd | Information & communication | 2019 |
| Cityasia Limited | Wholesale & retail | 2026 |
| Citylife Business Support Services Ltd | Administrative & support | 2017 |
| Citylink Contracts Limited | Professional & scientific | 1998 |
| Cityshape Developments Limited | Construction | 2010 |
| Civb Limited | Administrative & support | 2020 |
| Civic Capital Ltd | Real estate | 2016 |
| Civil Solutions South Ltd | Construction | 2012 |
| Civio Digital Ltd | Information & communication | 2026 |
| CJ Ingham Limited | Administrative & support | 2022 |
| CJ Sailing Ltd | Other services | 2009 |
| Cjjp Limited | Information & communication | 2015 |
| CJL Marine Joiners Ltd | Manufacturing | 2019 |
| Cjrlo Ltd | Real estate | 2025 |
| CJT Energy Services Ltd | Construction | 2024 |
| CK Data Visuals Limited | Information & communication | 2022 |
| CK Homes Limited | Construction | 2017 |
| CK IT Solutions Limited | Information & communication | 2010 |
| CKE Properties (Dorset) Limited | Real estate | 2022 |
| Ckmn Group Ltd | Professional & scientific | 2021 |
| Clabo Developments Limited | Construction | 2021 |
| Clabo Limited | Construction | 2005 |
| Claim Acquisition Partners Ltd | Financial services | 2026 |
| Clanrose Investments Ltd | Financial services | 2025 |
| Clare Court (Poole) Management Co. Ltd. | Households | 1995 |
| Claremont Gardens Management (Fontwell) Limited | Real estate | 2008 |
| Claremont Lodge Care Home Ltd | Health & social care | 2006 |
| Claremont Poole Freehold Limited | Real estate | 2014 |
| Clarence Estates Limited | Professional & scientific | 1999 |
| Clarendon Health Ltd | Health & social care | 2022 |
| Clarendon Legal Services Limited | Professional & scientific | 2018 |
| Clarendon Property Asset Management Ltd | Financial services | 2022 |
| Clareton (Basingstoke) Limited | Real estate | 2010 |
| Clareton (Bitterne) Limited | Real estate | 2008 |
| Clareton (Management) Limited | Real estate | 2011 |
| Clareton Land Limited | Real estate | 2002 |
| Clarifia Health Tech Limited | Information & communication | 2026 |
| Clarity Charters Limited | Transport & logistics | 2004 |
| Clarity Glass & Glazing Limited | Construction | 2006 |
| Clark Equity Partners Limited | Professional & scientific | 2014 |
| Clark Estates (Holdings) Ltd | Professional & scientific | 2008 |
| Clark Estates (Investments) Limited | Real estate | 2013 |
| Clark Estates (UK) Ltd | Real estate | 2005 |
| Clark Estates Ltd | Real estate | 2009 |
| Clark Jamison International Ltd | Professional & scientific | 2021 |
| Clark Jamison Ltd | Professional & scientific | 2014 |
| Clark Jamison PA Ltd | Professional & scientific | 2003 |
| Clarke Estate Holdings Ltd | Financial services | 2026 |