| Chuk Solutions Ltd | Wholesale & retail | 2020 |
| Church Car Sales Ltd | Wholesale & retail | 2023 |
| Church Farm (Motcombe) Ltd | Construction | 2020 |
| Church View Southbourne Management Ltd | Households | 2020 |
| Churchfield Investments Ltd | Real estate | 2012 |
| Churchill Gardens (Sturminster Marshall) Limited | Households | 2026 |
| Churchill Lodge (Alum Chine) Freehold Limited | Households | 2016 |
| Churchill Motors (Poole) Limited | Wholesale & retail | 2010 |
| Ciao Tutti Ltd | Hospitality | 2026 |
| Ciaran Jamie Parsons Ltd | Information & communication | 2019 |
| CIM Delivery Ltd | Transport & logistics | 2014 |
| Cinechrome Studios Limited | Real estate | 2014 |
| Cinhan Ltd | Extraterritorial | 2019 |
| Circle Moon Ventures Ltd | Administrative & support | 2015 |
| Cirql Ltd | Information & communication | 2026 |
| Cirro Limited | Information & communication | 2013 |
| Cirrus Marketing Limited | Transport & logistics | 2003 |
| Citizens Advice Bournemouth, Christchurch and Poole | Health & social care | 1998 |
| Citrus Bunn Ltd | Arts & recreation | 2019 |
| City Eco Hotel Limited | Hospitality | 2006 |
| City GAS Appliances Limited | Construction | 2011 |
| City Supercars Car Hire Limited | Transport & logistics | 2015 |
| City Treats Ltd | Hospitality | 2026 |
| Citygate Church | Other services | 2006 |
| Citygate Events Ltd | Hospitality | 2011 |
| Citygrad Limited | Administrative & support | 2017 |
| Civectis Ltd | Construction | 2026 |
| CJ Edwards Consulting Limited | Professional & scientific | 2022 |
| CJ Projects Ltd | Construction | 2023 |
| CJA 1 Limited | Real estate | 2012 |
| CJB Energy Ltd | Construction | 2024 |
| CJB1979 Ltd | Real estate | 2025 |
| CJI Building Ltd | Construction | 2020 |
| CJI Landscape Ltd | Administrative & support | 2026 |
| CJP Marine Crewing Ltd | Manufacturing | 2024 |
| CJT Surveying & Engineering Limited | Construction | 2019 |
| Cjwa Ltd | Real estate | 2014 |
| Ckbl Properties Ltd | Real estate | 2025 |
| Ckht Ltd | Administrative & support | 2023 |
| CL Accountancy Solutions Limited | Professional & scientific | 2025 |
| Cl&P Properties Ltd | Real estate | 2025 |
| CL9 Limited | Hospitality | 2023 |
| Clair Lodge (Management) Limited | Households | 2006 |
| Clara Ngozi Limited | Health & social care | 2020 |
| Claremont Hotel (Bournemouth) Limited | Hospitality | 2017 |
| Claremont Hotel Eastbourne Limited | Hospitality | 2009 |
| Clarendon 2 Management Limited | Households | 2001 |
| Clarendon Court (Bournemouth) Limited | Households | 1998 |
| Clarendon Court (Freehold) Limited | Households | 2000 |
| Clarendon Court (Wessex) Limited | Extraterritorial | 2015 |
| Clarendon Farm Limited | Agriculture & fishing | 2016 |
| Clarendon House Westbourne Ltd | Real estate | 2022 |
| Claret Catering Ltd | Hospitality | 2010 |
| Clariana AI Ltd | Information & communication | 2026 |
| Clarilaw & Co.Estates Limited | Real estate | 2025 |
| Clarilaw Limited | Professional & scientific | 2025 |
| Clarity Cover Ltd | Other services | 2025 |
| Clarity Homeclean Ltd | Administrative & support | 2014 |
| Clarity Insurance Services Limited | Financial services | 2019 |
| Clarity Life Ltd | Financial services | 2015 |
| Clarity Services Holdings Ltd | Financial services | 2025 |
| Clarity Setters Ltd | Administrative & support | 2025 |
| Clarity Therapy Rooms Limited | Health & social care | 2025 |
| Clarity Trading Group Limited | Information & communication | 2023 |
| Claritycom Ltd | Information & communication | 2013 |
| Clark Property Services Ltd | Construction | 2018 |
| Clarke AV Ltd | Information & communication | 2018 |
| Clarke Roofing Contractors Limited | Construction | 2025 |
| Clarke's Lettings Ltd | Real estate | 2017 |
| Clarke's Tree Care Limited | Agriculture & fishing | 2007 |
| Clarkes Properties Limited | Real estate | 2014 |
| Classic Fanatic Limited | Wholesale & retail | 2015 |
| Classicrose Ltd | Hospitality | 2022 |
| Classy Brows Ltd | Other services | 2023 |
| Classy Collections Limited | Wholesale & retail | 2001 |
| Claude Desouche Limited | Construction | 2002 |
| Claygold Property Limited | Real estate | 1991 |
| CLC Tax Solutions Ltd | Professional & scientific | 2023 |
| Clean and Care Services Limited | Administrative & support | 2017 |
| Clean and Fresh Limited | Administrative & support | 2003 |
| Clean Capture Ltd | Information & communication | 2020 |
| Clean Carpet Happy Feet Limited | Wholesale & retail | 2022 |
| Clean CUT Construction Services Limited | Construction | 2006 |
| Clean Glance Ltd | Administrative & support | 2016 |
| Clean Keepers Ltd | Administrative & support | 2024 |
| Clean Queens Cleaners Ltd | Administrative & support | 2019 |
| Clean Scrub Limited | Administrative & support | 2025 |
| Clean to a T Ltd | Administrative & support | 2020 |
| CLEAN2SPEC Cleaning Contractors Limited | Administrative & support | 2023 |
| Cleaning Services Dorset Ltd | Administrative & support | 2020 |
| Cleanyx Cleaners Ltd | Administrative & support | 2026 |
| Clear Advice Mortgage & Protection Ltd | Financial services | 2022 |
| Clear Approach Property Limited | Real estate | 2026 |
| Clear Business Management Ltd | Professional & scientific | 2025 |
| Clear Drylining Ltd | Construction | 2025 |
| Clear Pathway Care Ltd | Health & social care | 2017 |
| Clear Perspextive Ltd | Professional & scientific | 2023 |
| Clear Property Management Ltd | Real estate | 2024 |
| Clear Tenders Limited | Administrative & support | 2012 |
| Clear Waters (Southbourne) Management Limited | Households | 2011 |