| Central Car Vault Ltd | Transport & logistics | 2018 |
| Central Electrical Engineering Services (Aylesbury) Limited | Construction | 1980 |
| Central Electrical Engineering Services (High Wycombe) Limited | Construction | 1985 |
| Central Neuroscience Services Limited | Health & social care | 2016 |
| Centrepiece Consulting and Coaching Services Ltd. | Professional & scientific | 2014 |
| Centrifungal Ltd | Manufacturing | 2020 |
| Centurion (Bucks) Limited | Hospitality | 2012 |
| Centurion Health Limited | Wholesale & retail | 2018 |
| Centurion Life Partners LLP | | 2010 |
| Centurion Management Services (UK) Limited | Professional & scientific | 2007 |
| Centurion Portfolio Managers Limited | Financial services | 2007 |
| Cephasivy Ltd | Health & social care | 2014 |
| Ceramics and Steel Limited | Wholesale & retail | 2018 |
| Cerberus Digital Holdings Limited | Financial services | 2026 |
| Cerberus Motor Paints Limited | Manufacturing | 2014 |
| Cerberus Racewear Limited | Wholesale & retail | 2014 |
| Cerlex Limited | Real estate | 2013 |
| Certified Wheels Ltd | Wholesale & retail | 2024 |
| Certify Damp UK Ltd | Education | 2025 |
| Cervantes Services Ltd | Professional & scientific | 2026 |
| CEW Construction Limited | Construction | 2018 |
| Ceybertech Limited | Administrative & support | 2026 |
| Ceylon Cultural Hub UK Ltd | Arts & recreation | 2025 |
| Ceylon Dosa Ltd | Hospitality | 2023 |
| Ceylonsiddi Ltd | Wholesale & retail | 2025 |
| CGN Commerce Ltd | Wholesale & retail | 2024 |
| CGN Design Ltd | Professional & scientific | 2019 |
| CGN Group Ltd | Construction | 2025 |
| CH2M Limited | Agriculture & fishing | 1998 |
| Chace Rigging Ltd | Construction | 2020 |
| Chagcrest Investments Limited | Financial services | 2018 |
| Chain Maker Limited | Real estate | 2005 |
| Chain Makers Limited | Real estate | 2005 |
| Chain-Movers Ltd | Real estate | 2000 |
| Chalfont Gastroenterology Services Limited | Health & social care | 2020 |
| Chalfont Gymnastics Academy Limited | Arts & recreation | 2014 |
| Chalfontpro Services Limited | Real estate | 2022 |
| Chalk Spring Farm Ltd | Agriculture & fishing | 2024 |
| Challenge Fire Limited | Manufacturing | 2009 |
| Challis School of Dance Limited | Arts & recreation | 2020 |
| Chamal Global Services Ltd | Health & social care | 2015 |
| Chamanthi Ltd | Information & communication | 2011 |
| Chamber Holdings Group Limited | Financial services | 2026 |
| Chamber Jjfd Holdings Ltd | Financial services | 2026 |
| Chamber of Diaspora H1A Limited | Real estate | 2026 |
| Chamber of Diaspora HIA Consult Limited | Real estate | 2023 |
| Chamberlain Road (Aylesbury) Ltd | Real estate | 2008 |
| Chambers Engineering Limited | Wholesale & retail | 1992 |
| Chambers Real Estate Limited | Professional & scientific | 2003 |
| Champagne Commie Limited | Arts & recreation | 1997 |
| Champney's Property Development Limited | Real estate | 2017 |
| Chan Thai Therapy Ltd | Other services | 2024 |
| Change Associates Holdings Limited | Financial services | 2022 |
| Changes Barbershop Ltd | Other services | 2020 |
| Channel Matters Ltd | Administrative & support | 2017 |
| Chantry Tax & Advisory Ltd | Professional & scientific | 2025 |
| Chaos Strength Ltd | Arts & recreation | 2017 |
| Chapel Events Limited | Hospitality | 2025 |
| Chapel Road Consulting Limited | Transport & logistics | 2017 |
| Chapel Road Farm Estates Limited | Agriculture & fishing | 2017 |
| Chapter Limited | Extraterritorial | 1999 |
| Character Fancy Dress Ltd | Administrative & support | 2010 |
| Charisma Home Solutions Ltd | Construction | 2016 |
| Charles Blakey Property Development Limited | Construction | 2018 |
| Charles Crisp Associates Limited | Extraterritorial | 2002 |
| Charles Hamer French Tax Services Limited | Professional & scientific | 2016 |
| Charles Huntington Limited | Construction | 2009 |
| Charlie & Hunter Limited | Hospitality | 2014 |
| Charlotte Chaliha Mrcog Limited | Health & social care | 2014 |
| Charlotte Rees Oncology Limited | Health & social care | 2019 |
| Charlton Design & Build Ltd | Construction | 2022 |
| Charlton Ltd | Health & social care | 2021 |
| Charm Medical Practice Ltd | Professional & scientific | 2019 |
| Charm Properties Private Limited | Real estate | 2026 |
| Charmlink Limited | Professional & scientific | 2003 |
| Charya Limited | Health & social care | 2022 |
| Chattel House Limited | Real estate | 2016 |
| Chaucer Drive Residents Association Limited | Households | 1996 |
| Chauffeured Services Ltd | Transport & logistics | 2011 |
| Chauhan Optics Limited | Wholesale & retail | 2016 |
| Chawaz Limited | Health & social care | 2022 |
| Chaz Music Limited | Information & communication | 2020 |
| Chelsea Mews Management Services Limited | Households | 2016 |
| Chelski Associates Limited | Professional & scientific | 2004 |
| Chequers Court Management Company Limited | Households | 1977 |
| Cherans Properties Limited | Real estate | 2026 |
| Cherie Property Investment Ltd | Real estate | 2021 |
| Cherokee Sound Limited | Information & communication | 2000 |
| Cherry Leas Management Company Limited | Households | 2020 |
| Cherry Tree Close Care (Wendover) Limited | Households | 1995 |
| Cherry Tree Contractors Limited | Construction | 2024 |
| Ches Management Company Limited | Real estate | 2020 |
| Chesham Trans Limited | Transport & logistics | 2019 |
| Chestnut Consult Limited | Professional & scientific | 2025 |
| Chestnut Holdco Limited | Financial services | 2025 |
| Chew Magna Estates Limited | Professional & scientific | 2022 |
| Chew Magna Estates Two Limited | Construction | 2022 |
| Cheza Properties Limited | Real estate | 2022 |
| Chi&Chi Services Ltd | Administrative & support | 2019 |
| Chibembe Estates Limited | Hospitality | 2006 |