| Christchurch Foot Clinic Ltd | Health & social care | 2021 |
| Christchurch Hotels Ltd | Hospitality | 2002 |
| Christchurch Motor Company Ltd | Wholesale & retail | 2019 |
| Christchurch Mots & Service Ltd | Wholesale & retail | 2026 |
| Christchurch Music Festival Limited | Professional & scientific | 2018 |
| Christchurch Pavilion Limited | Hospitality | 2009 |
| Christchurch Physiotherapy Ltd | Health & social care | 2025 |
| Christchurch Priory Enterprises Limited | Wholesale & retail | 1985 |
| Christchurch Restaurants Limited | Hospitality | 2002 |
| Christchurch Rowing Club CIC | Arts & recreation | 2023 |
| Christchurch Rugby Football Club Ltd | Arts & recreation | 2019 |
| Christchurch Sailing Club CIC | Arts & recreation | 2021 |
| Christchurch Shopping Village Limited | Wholesale & retail | 2016 |
| Christian Science Nursing Agency Limited | Other services | 1991 |
| Chubb Treecare Limited | Administrative & support | 2015 |
| Chuniver LLP | | 2012 |
| Church Mews (Pontefract) Management Company Limited | Real estate | 2025 |
| Chutney Corner Ltd | Hospitality | 2025 |
| Cicek Homes Limited | Real estate | 2016 |
| Circle Cafes Ltd | Hospitality | 2025 |
| CIRCULAR11 Communities C.I.C. | Manufacturing | 2021 |
| CIRCULAR11 Ltd | Manufacturing | 2021 |
| CJH Accounts Ltd | Professional & scientific | 2026 |
| CK Independent Training Ltd | Health & social care | 2014 |
| CKS Projects Limited | Extraterritorial | 2015 |
| Clacc BCP Limited | Professional & scientific | 2023 |
| Clan Projects Ltd | Construction | 2023 |
| Clarendon Road (Christchurch) Management Company Limited | Households | 2024 |
| Clarendon Rocks Limited | Information & communication | 2026 |
| Classic and Performance Ltd | Wholesale & retail | 1994 |
| Cleanfreek Ltd | Other services | 2013 |
| Cleantask Ltd | Administrative & support | 2020 |
| Clear Coaching Limited | Administrative & support | 2023 |
| Clear CUT Marketing Limited | Manufacturing | 2023 |
| Clear Drain Solutions Group Ltd | Water & waste | 2025 |
| Clear Drain Solutions Ltd | Water & waste | 2024 |
| Clearpoint Property Management Company Limited | Households | 2009 |
| Clearview BED BUG Monitor Ltd | Administrative & support | 2022 |
| Clem Auto Repair & Sales Ltd | Professional & scientific | 2026 |
| Clere Futures Ltd | Information & communication | 2005 |
| Clifton Heights Management Company Limited | Households | 1999 |
| Clinical Supporter Limited | Health & social care | 2022 |
| Clive Holmes Limited | Information & communication | 1973 |
| Cloud Nine Professional Services Limited | Professional & scientific | 2003 |
| Cloudspring Technologies Limited | Information & communication | 2006 |
| Clump Industrial Estate Management Limited | Households | 1990 |
| Clvr Consulting Ltd | Professional & scientific | 2026 |
| CNG Building Services Limited | Construction | 2012 |
| Coachhollaa Ltd | Arts & recreation | 2025 |
| Coast & Country Camping Club Ltd | Hospitality | 2025 |
| Coast Bookkeeping Limited | Professional & scientific | 2016 |
| Coastal Artisan Projects Ltd | Manufacturing | 2025 |
| Coastal Boat Sales Ltd | Manufacturing | 2025 |
| Coastal Breeze Air Conditioning Ltd | Energy | 2026 |
| Coastal Construction UK Ltd | Construction | 2002 |
| Coastal Flooring Limited | Wholesale & retail | 2009 |
| Coastal Marine Sales UK Ltd | Wholesale & retail | 2019 |
| Coastal Structures Limited | Professional & scientific | 2025 |
| Coastal Tearooms Ltd | Hospitality | 2023 |
| Coastline Roofing & Building Ltd | Construction | 2026 |
| Cobra Electronics UK Limited | Professional & scientific | 2006 |
| Cobra Marine Group Ltd | Administrative & support | 2019 |
| Cobra Marine International Ltd | Wholesale & retail | 2024 |
| Cobra Ribs Limited | Manufacturing | 2006 |
| Coco Nails Highcliffe Limited | Other services | 2024 |
| Cocomino Ltd | Wholesale & retail | 2026 |
| Coexploration Limited | Education | 2014 |
| Coffee Pantry Ltd | Hospitality | 2021 |
| Coil Lock Ltd | Wholesale & retail | 2024 |
| Coldstreamer Limited | Real estate | 2016 |
| Collaborate Futures Ltd | Professional & scientific | 2025 |
| Collier Testing Solutions Ltd | Information & communication | 2012 |
| Colonial Contractors Limited | Construction | 2011 |
| Colson Greens Limited | Administrative & support | 2019 |
| Columba Cook Limited | Professional & scientific | 2002 |
| Commercial Catering (Fabrications) Limited | Wholesale & retail | 1988 |
| Commercial Catering Equipment Co. (Southern) Limited | Extraterritorial | 1987 |
| Comojo Limited | Wholesale & retail | 2013 |
| Companion Social Care Ltd | Public administration | 2025 |
| Compare Technology Limited | Administrative & support | 2008 |
| Complete Active Christchurch Ltd | Arts & recreation | 2020 |
| Complete Production Solutions Limited | Extraterritorial | 2001 |
| Concept Cleaning Solutions Limited | Administrative & support | 2017 |
| Concept Incentives Limited | Wholesale & retail | 1990 |
| Concert Production Services Limited | Arts & recreation | 1998 |
| Conference Desk Limited | Professional & scientific | 2004 |
| Connected Executive Search Limited | Administrative & support | 2017 |
| Connectors Services Ltd | Administrative & support | 2022 |
| Connexz Ltd | Professional & scientific | 2023 |
| Consultants@Quayside Limited | Professional & scientific | 2010 |
| Consulting RG Ltd | Real estate | 2021 |
| Cooke Consulting Ltd | Professional & scientific | 2024 |
| Copeland Cars Limited | Wholesale & retail | 2022 |
| Corbens Estate Agents Limited | Real estate | 2022 |
| Cordell Ltd | Administrative & support | 2021 |
| Cordie Ltd | Professional & scientific | 2003 |
| Core Branding Limited | Wholesale & retail | 2015 |
| Corporate Catering (Ice Cream) Limited | Transport & logistics | 2014 |
| Cort Hoardings Ltd | Construction | 2011 |
| Cotswold Hoburne Limited | Hospitality | 1971 |