| Cali Fusco Limited | Real estate | 2018 |
| Caliain Ltd | Real estate | 2022 |
| Calme Management Company Ltd | Households | 2025 |
| Canford Consultancy Services Limited | Professional & scientific | 2016 |
| Canford Poole Ltd | Construction | 2023 |
| Canine Training Limited | Other services | 2025 |
| Canteron Properties Limited | Real estate | 2023 |
| Caple Consulting Limited | Information & communication | 2023 |
| Caprelo Global Limited | Administrative & support | 2013 |
| Car Link Limited | Wholesale & retail | 2010 |
| Care First Recruitment Solutions LLP | | 2008 |
| Carl Smalley Interiors Limited | Construction | 2021 |
| Carnival Fairgrounds Limited | Manufacturing | 2016 |
| Carpets by Marcus Limited | Construction | 2018 |
| Cars of Winkton Limited | Wholesale & retail | 2020 |
| Carter Importing Ltd | Wholesale & retail | 2014 |
| Carters Concrete Ltd | Construction | 2013 |
| Casalattico Limited | Real estate | 2018 |
| Casbrook Home Care Ltd | Health & social care | 2008 |
| Casbrook Property Management Ltd | Hospitality | 2020 |
| Casterbridge Property Management Ltd | Households | 2010 |
| Castle Lane Barber Shop Limited | Administrative & support | 2003 |
| Castleman Community Larder CIC | Wholesale & retail | 2023 |
| Catherine Turner Limited | Professional & scientific | 2009 |
| Cathrine Mcluckie Ltd | Administrative & support | 2026 |
| Cavendish Classic Cars Limited | Wholesale & retail | 2023 |
| Cavendish Financial Holdings Limited | Financial services | 2023 |
| Cavendish Property Investments (South West) Limited | Real estate | 2022 |
| CC Process Agents Limited | Administrative & support | 2008 |
| CCE Investments Limited | Real estate | 2019 |
| Cddc Ferndown Ltd | Hospitality | 2025 |
| CDJ Solutions Limited | Construction | 2014 |
| Cedar Road (Kettering) Management Limited | Extraterritorial | 2009 |
| Cemoc Limited | Information & communication | 1982 |
| Centra Training Limited | Education | 2022 |
| Central Point Portsmouth Management Company Limited | Other services | 2004 |
| Cerro DOS MOS Limited | Real estate | 2021 |
| CH Leif Limited | Professional & scientific | 2023 |
| Chainsawbars Limited | Agriculture & fishing | 2004 |
| Chalet Vista Limited | Real estate | 2004 |
| Character Wonderland Ltd | Arts & recreation | 2023 |
| Charminster Farm Management Company Limited | Households | 2017 |
| Chedid RE UK Limited | Financial services | 2024 |
| Chez Fred Limited | Hospitality | 2015 |
| Chianti Ristorante Limited | Hospitality | 2023 |
| Choose Lives CIC | Information & communication | 2025 |
| Chunkzzferndown Ltd | Hospitality | 2024 |
| Churchbury Homes Limited | Real estate | 2022 |
| Churchbury Management Company (Gillingham) Limited | Households | 2023 |
| Churchfield Sales and Lettings Ltd | Real estate | 2024 |
| Chyverton Forest Limited | Arts & recreation | 2026 |
| Cillestia Pharmaceutical Ltd | Wholesale & retail | 2021 |
| Clarke and Partners LLP | | 2007 |
| Clayton and Sheldon Holdings Limited | Financial services | 2025 |
| Cleaning the Soul Ltd | Administrative & support | 2022 |
| Clear Bookkeeping Ltd | Professional & scientific | 2011 |
| Clear Bookkeeping Merch Ltd | Manufacturing | 2021 |
| Cleave Wood Developments Limited | Construction | 2009 |
| Clements Court Management Company Limited | Households | 1979 |
| Clever PIG Solutions Ltd | Information & communication | 2021 |
| Click DF UK Limited | Wholesale & retail | 2018 |
| Click Digital Flyer Limited | Administrative & support | 2021 |
| Cliffton Developments Limited | Construction | 2022 |
| Cloud 10 Solutions Limited | Information & communication | 2017 |
| Cloud Nine Beauty Ltd | Other services | 2008 |
| CMD Creative Limited | Professional & scientific | 2017 |
| Co COM 14 LP | | 2017 |
| Co COM 17 LP | | 2017 |
| Co COM 18 LP | | 2015 |
| Co COM 20 LP | | 2022 |
| Co COM 23 LP | | 2024 |
| Co COM 24 LP | | 2024 |
| Co COM 25 LP | | 2024 |
| Co COM 29 LP | | 2024 |
| Co COM 3 LP | | 2007 |
| Co COM 30 LP | | 2024 |
| Co COM 6 LP | | 2017 |
| Co COM 7 LP | | 2017 |
| Co COM 8 LP | | 2017 |
| Coachopolis Limited | Professional & scientific | 2018 |
| Coast Carpet Cleaners Limited | Other services | 2014 |
| Coastline Cooling Services Ltd | Energy | 2023 |
| Cobalt Employment Law Ltd | Professional & scientific | 2019 |
| Cobblers & Locksmiths Christchurch Limited | Other services | 2004 |
| Cockerhoop Limited | Financial services | 2026 |
| Cogent Business Solutions Limited | Extraterritorial | 2008 |
| Cohen Consulting Limited | Professional & scientific | 2009 |
| Coker Carpentry Limited | Construction | 2023 |
| Colbridge Atlas Limited | Financial services | 2026 |
| Colin Robert Investments Limited | Construction | 2021 |
| Colin's Property Clearance Limited | Water & waste | 2020 |
| Collective Group Solutions Limited | Professional & scientific | 2024 |
| Comcraft Software Limited | Information & communication | 2022 |
| Commercial & Specialised Diving Limited | Administrative & support | 2003 |
| Commrich Limited | Information & communication | 2001 |
| Company & Corporate LP | | 2007 |
| Compare My Credit Score Limited | Extraterritorial | 2012 |
| Compass Building Services Limited | Construction | 2022 |
| Compass Hold Limited | Financial services | 2024 |
| Compass Property Services Limited | Real estate | 2025 |