| Cornerstone England Ltd | Hospitality | 2013 |
| Cornfield Property Management Limited | Real estate | 1983 |
| Cornish Crabbers Ltd | Professional & scientific | 2020 |
| Corolanty Management Company Limited | Households | 1985 |
| Coronation AVE Limited | Health & social care | 2024 |
| Corporate Flower Rentals Ltd | Other services | 2015 |
| Corporate Health and Wellness Ltd | Health & social care | 2008 |
| Corporate Social Responsibility Award Ltd CIC | Other services | 2018 |
| Corporate Therapy Ltd | Professional & scientific | 2023 |
| Corvette Estates Limited | Real estate | 2006 |
| Corvus Executive Solutions Limited | Administrative & support | 2017 |
| Cosmetics HQ Dorset Ltd | Other services | 2022 |
| Costa One Ltd | Construction | 2020 |
| Costel Driving Limited | Transport & logistics | 2017 |
| Costello Locum Ltd | Health & social care | 2007 |
| Costi Healthcare Services Limited | Health & social care | 2023 |
| Cosy Cottage (Bournemouth) Limited | Professional & scientific | 2019 |
| Cosy Management Ltd | Information & communication | 2014 |
| Cosy Village Ltd | Hospitality | 2023 |
| Cosy's Castles Ltd | Manufacturing | 2023 |
| Cotidie Traditio Ltd | Transport & logistics | 2023 |
| Cottage Caterers (West Moors) Limited | Real estate | 1958 |
| Counselling to Change Ltd | Health & social care | 2022 |
| Country 2 Capital Limited | Wholesale & retail | 2012 |
| Country Drylining Ltd | Construction | 2020 |
| Country Estate Grounds Ltd | Administrative & support | 2023 |
| Country House Care Limited | Other services | 1999 |
| Country Properties Franchising Limited | Administrative & support | 1994 |
| Countryside Tree Surgeons Limited | Agriculture & fishing | 2005 |
| Countrywide Flooring (Bournemouth) Ltd. | Construction | 2007 |
| Countrywide Roofing Ltd | Construction | 2025 |
| County Commercial Cleaning Limited | Administrative & support | 2018 |
| County Gutters Limited | Construction | 2012 |
| County Roof Ltd | Construction | 2025 |
| Court END Developments Ltd | Construction | 2013 |
| Courtfield Freehold Ltd | Households | 2023 |
| Courtleigh Manor Freeholders Limited | Households | 2014 |
| Courtney Parker Limited | Construction | 2017 |
| Couture London Ltd | Wholesale & retail | 2022 |
| Cowgrove Limited | Real estate | 2006 |
| COX & FOY Limited | Construction | 2012 |
| COX Stuart Business Services Ltd | Professional & scientific | 2019 |
| Coxy Heating & Plumbing Ltd | Construction | 2023 |
| COY Garden Court Management Company Limited | Households | 2006 |
| COY Pond Developments Limited | Construction | 1995 |
| Cozy Clean Solution Ltd | Administrative & support | 2025 |
| Cozzi Ltd | Construction | 2020 |
| Cozzy Homes BCP Ltd | Real estate | 2025 |
| Cozzy Property Group Ltd | Real estate | 2022 |
| Cpbpro Ltd | Other services | 2018 |
| CPF Five Limited | Financial services | 2023 |
| CPF One Limited | Financial services | 2017 |
| CPF Three Limited | Financial services | 2021 |
| CPF Two Limited | Financial services | 2018 |
| CPP Projects & Maintenance Ltd | Construction | 2021 |
| CPS Fencing & Sons Limited | Agriculture & fishing | 2020 |
| CPS Garden Services Ltd | Professional & scientific | 2020 |
| CPW Exterior Cleaning Ltd | Administrative & support | 2025 |
| CPW Group Limited | Extraterritorial | 2017 |
| CR3 Company Limited | Households | 1994 |
| Crabton Close Road Management Co Limited | Real estate | 1996 |
| Crabton Court Management Limited | Households | 1990 |
| Crabtree Electrical Ltd | Construction | 2022 |
| Cracking Media Limited | Professional & scientific | 2008 |
| Cracknell Timber Limited | Wholesale & retail | 2015 |
| Crack’D Pickleballs Ltd | Manufacturing | 2025 |
| Craft Electrical Contractors Limited | Construction | 1994 |
| Crafted Beauty for YOU Ltd | Manufacturing | 2025 |
| Craftedcrest Ventures Ltd | Real estate | 2025 |
| Craftkey Limited | Administrative & support | 2023 |
| Craftkin Limited | Wholesale & retail | 2023 |
| Craftstone Building Solutions Ltd | Construction | 2019 |
| Crafty Ball Ltd | Health & social care | 2018 |
| Crag Head Limited | Households | 2002 |
| Crag Head Management (Bournemouth) Limited | Households | 1978 |
| Cranborne Court (Bournemouth) Management Company Limited | Households | 1962 |
| Cranbrook Court (Bournemouth) Management Limited | Households | 2004 |
| Cranbrook Property Management Limited | Real estate | 2000 |
| Cranfield Achieve Limited | Professional & scientific | 2014 |
| Cranfield Coaching Limited | Administrative & support | 2023 |
| Cranfield Legal Services Limited | Professional & scientific | 2014 |
| Cranleigh and Beaufort Road RTM Company Limited | Households | 2020 |
| Cransley Court (Bournemouth) Limited | Households | 2003 |
| Crathes Technology Limited | Information & communication | 2018 |
| Crave Fitness Ltd | Arts & recreation | 2022 |
| Crawley Spinal Health Ltd | Health & social care | 2019 |
| Crazy Life Limited | Information & communication | 2020 |
| Crazy Property Ltd | Financial services | 2021 |
| Crazybuy Ltd | Wholesale & retail | 2019 |
| CRC Consultancy Services Limited | Professional & scientific | 2024 |
| Cream & Bean Ltd | Wholesale & retail | 2026 |
| Created by Dior Simone Limited | Arts & recreation | 2022 |
| Createful Limited | Administrative & support | 2010 |
| Creative Adrenalin Ltd | Professional & scientific | 2011 |
| Creative Furniture Solutions Ltd | Construction | 2026 |
| Creative Life Bookkeeping Limited | Administrative & support | 2011 |
| Creative Music Production Limited | Arts & recreation | 2010 |
| Creative Retail Solutions Limited | Manufacturing | 2003 |
| Creative Ro-Design Engineering Limited | Professional & scientific | 2024 |
| Creative Roof Solutions Limited | Administrative & support | 2017 |