| Capella Court Management (Bournemouth) Limited | Households | 1994 |
| Capital and Coastal Ltd | Administrative & support | 2009 |
| Capital Consolidations Ltd | Financial services | 2010 |
| Capital Estate Plans Ltd | Financial services | 2016 |
| Capital Securities Limited | Real estate | 1999 |
| Caplan & Caplan Financial Services Limited | Financial services | 2021 |
| Caplock AFM Ltd | Wholesale & retail | 2023 |
| Capri Investments Ltd | Hospitality | 2014 |
| Capricorn Property Solutions Ltd | Real estate | 2019 |
| Caprising Limited | Professional & scientific | 2017 |
| Captain Pole Wash Limited | Administrative & support | 2017 |
| Captiva Homes (Bembridge) Ltd | Construction | 2026 |
| Captiva Homes (Godshill) Limited | Construction | 2021 |
| Captiva Homes (Rookley) Ltd | Construction | 2020 |
| Captiva Homes Holdings Limited | Construction | 2017 |
| Captiva Homes Limited | Construction | 2005 |
| Capture Housing Limited | Construction | 2017 |
| Captured Spaces Studio Ltd | Professional & scientific | 2025 |
| Capx Limited | Real estate | 2023 |
| Capybara Cafe Ltd | Wholesale & retail | 2025 |
| Car Angels Limited | Other services | 2012 |
| Car Wash Kinson Limited | Administrative & support | 2026 |
| Cara MIA Trading Ltd | Wholesale & retail | 2021 |
| Caraers Limited | Wholesale & retail | 2021 |
| Carbery Wood Freehold Limited | Hospitality | 2006 |
| Carbon Copy Communications Ltd | Information & communication | 2011 |
| Carbon CRE8 Ltd | Professional & scientific | 2018 |
| Carbon Trading Group Limited | Construction | 2018 |
| Card Margin Ltd | Wholesale & retail | 2016 |
| Cardigan Drive Ltd | Transport & logistics | 2020 |
| Cardwell Contracts Limited | Wholesale & retail | 2003 |
| Care & Patience Ltd | Health & social care | 2018 |
| Care 4 Properties Ltd | Households | 2026 |
| Care Planner Ltd | Information & communication | 2012 |
| Care Retirement Options Limited | Administrative & support | 2008 |
| Care Safety Innovations UK Ltd | Information & communication | 2024 |
| Carers for Your Needs Limited | Health & social care | 2015 |
| Caretek Ltd | Information & communication | 2017 |
| Carethrone Healthcare Ltd | Administrative & support | 2026 |
| Carewell Pharmacy Ltd | Wholesale & retail | 2023 |
| Cariba Limited | Administrative & support | 2012 |
| Caribbean Rugby CIC | Education | 2023 |
| Carina Court Management Company Limited | Households | 1987 |
| Carisbrooke House(Westbourne)Limited | Households | 1962 |
| Carleton LEE Limited | Professional & scientific | 1993 |
| Carlinford (Boscombe) Limited | Households | 1991 |
| Carlos Costa Limited | Professional & scientific | 2019 |
| Carlos Tapas Express Ltd | Wholesale & retail | 2022 |
| Carlson Gracie Camberley Limited | Arts & recreation | 2013 |
| Carlton Dene (Bournemouth) Management Company Limited | Households | 1999 |
| Carlton Lodge (Management) Limited | Households | 1987 |
| Carltongate (Bournemouth) Limited | Households | 1984 |
| Carly House Interiors Limited | Professional & scientific | 2024 |
| Carly Louise Limited | Wholesale & retail | 2025 |
| Carmen Lewis Limited | Wholesale & retail | 2022 |
| Carmichael & Todd Ltd | Administrative & support | 2001 |
| Caro Design Limited | Wholesale & retail | 2016 |
| Carol Gets IT Right Travel Ltd | Administrative & support | 2023 |
| Carole a Dowland Bookkeeping Services Limited | Professional & scientific | 2009 |
| Caroline Katushabe Ltd | Health & social care | 2020 |
| Carom Limited | Real estate | 2005 |
| Carousel Freight (Dorset) Limited | Transport & logistics | 1987 |
| Carpentree UK Ltd | Construction | 2008 |
| Carpentry Construction Ltd | Manufacturing | 2025 |
| Carpentry Global Marine Service Ltd | Other services | 2020 |
| Carpet Barn Limited | Extraterritorial | 1990 |
| Carpet Doctors South Limited | Administrative & support | 2025 |
| Carpri Solutions Ltd | Administrative & support | 2025 |
| Carr Civil Engineering (Grouting) Ltd | Construction | 2020 |
| Carr Civil Engineering Limited | Construction | 2008 |
| Carrington Signature Homes Ltd | Real estate | 2025 |
| Carrot Top Property Holdings Ltd | Real estate | 2024 |
| Cars to Go Limited | Wholesale & retail | 2003 |
| Cartech Garage Ltd | Wholesale & retail | 2009 |
| Carter & Co. Limited | Wholesale & retail | 1912 |
| Caru-Ruca Ltd | Wholesale & retail | 2023 |
| Carverco Ltd | Construction | 2022 |
| Carysfort Lodge Management Limited | Households | 2006 |
| Carz 4 YOU Bournemouth Ltd | Wholesale & retail | 2023 |
| Carzo Ltd | Transport & logistics | 2025 |
| CAS2 Infra Ltd | Real estate | 2024 |
| CAS2 Technologies Ltd | Information & communication | 2022 |
| Casa Colacicco Ltd | Real estate | 2025 |
| Casa Guidi Freehold Limited | Households | 2018 |
| Casablanca Developments Limited | Real estate | 1989 |
| Casablanca Group (London) Ltd. | Manufacturing | 2021 |
| Cascade Business Administration Limited | Administrative & support | 2023 |
| Cascarino Construction Ltd | Construction | 2024 |
| Cascourt Manco Limited | Households | 2006 |
| Casenest Ltd | Information & communication | 2025 |
| Caspian One Group Limited | Financial services | 2025 |
| Caspian One Limited | Information & communication | 2004 |
| Caspian One Open Data Limited | Information & communication | 2024 |
| Cassidy Construction Limited | Construction | 2025 |
| Cassius Groundworks Limited | Construction | 2017 |
| Casson & Friends Community Interest Company | Arts & recreation | 2017 |
| Casterbridge Court (Bournemouth) Limited | Households | 2003 |
| Casterbridge Holdings Limited | Financial services | 2016 |
| Castle & SON (Properties) Limited | Real estate | 2012 |
| Castle Convenience Ltd | Wholesale & retail | 2019 |