| Celicare Ltd | Health & social care | 2023 |
| Cellar Door Creative Limited | Professional & scientific | 2011 |
| Cellar Supplies Cheltenham Limited | Wholesale & retail | 2003 |
| Cellarhead Green Bess Limited | Energy | 2023 |
| Cellarhead Green NG Limited | Financial services | 2022 |
| Cellartech (South West) Limited | Other services | 2011 |
| Cellsoc Holdings Limited | Hospitality | 2025 |
| Cellsoc Limited | Hospitality | 2004 |
| Cellustar Company Limited | Manufacturing | 1992 |
| Celtic Web Solutions Limited | Information & communication | 2014 |
| CEN Investments Limited | Real estate | 2017 |
| Centaur Homes (East) Limited | Construction | 2018 |
| Centaur Homes (North) Limited | Construction | 2017 |
| Centaur Homes (South) Ltd | Construction | 2017 |
| Centaur Homes (West) Ltd | Construction | 2020 |
| Centaur Homes Ltd | Construction | 2006 |
| Centaur Land Limited | Construction | 2017 |
| Central and Urban Securities Limited | Extraterritorial | 2005 |
| Central Cladding Holdings Limited | Financial services | 2023 |
| Central Distribution 21 Limited | Wholesale & retail | 2020 |
| Central Motor Services (Cheltenham) Ltd | Wholesale & retail | 2012 |
| Central Park Holdings Limited | Professional & scientific | 2005 |
| Central Park Management Company (NO.2) Limited | Real estate | 2007 |
| Central Park Nursery Limited | Education | 2001 |
| Central Square (Stroud) Management Company Limited | Households | 2012 |
| Central Surveying Properties Ltd | Real estate | 2014 |
| Central Union Commercial Developments Limited | Extraterritorial | 1992 |
| Central Union Partners Ltd | Real estate | 2010 |
| Central Union Renewables Ltd | Financial services | 2015 |
| Centraltop Property Management Limited | Real estate | 1989 |
| Centre for Policy Modelling Ltd | Professional & scientific | 2023 |
| Centrepiece Marketing Limited | Professional & scientific | 2022 |
| Centurion Windows and Doors Limited | Construction | 2025 |
| Century Box & Packaging Limited | Manufacturing | 1997 |
| Cenzo Limited | Professional & scientific | 2025 |
| Ceramiart Dental Laboratories Limited | Health & social care | 1998 |
| Ceres Estates Limited | Real estate | 1959 |
| Ceres Homes Limited | Professional & scientific | 1962 |
| Ceres Vets Ltd | Professional & scientific | 2023 |
| Certifi Software Ltd | Administrative & support | 2018 |
| Certus Wholesale Ltd | Wholesale & retail | 2015 |
| Cetacea AI Limited | Information & communication | 2026 |
| Ceylon Heritage Limited | Wholesale & retail | 2024 |
| Ceylon Loyalty Tour Limited | Administrative & support | 2026 |
| Cezri Operating UK Limited | Wholesale & retail | 2026 |
| CF Farming Limited | Financial services | 2024 |
| CF Productions Limited | Arts & recreation | 2010 |
| Cfcx Limited | Hospitality | 2026 |
| CFH Group Holdings Limited | Professional & scientific | 2025 |
| CFH London Limited | Professional & scientific | 2017 |
| CFH Studio Limited | Professional & scientific | 2026 |
| CFL Commercials West Limited | Wholesale & retail | 2016 |
| CFM Vehicle Services Ltd | Wholesale & retail | 2023 |
| Cfms - Asrc Limited | Professional & scientific | 2010 |
| Cfms Limited | Professional & scientific | 2008 |
| Cfms Services Limited | Professional & scientific | 2006 |
| Cfoassistance Ltd | Professional & scientific | 2024 |
| CFR Investments Limited | Financial services | 2009 |
| CG (Cheltenham) Limited | Real estate | 2026 |
| CG Butler Consulting Ltd | Professional & scientific | 2024 |
| CG Engineering & Project Management Solutions Limited | Professional & scientific | 2011 |
| CG Kitchens & Carpentry Ltd | Manufacturing | 2014 |
| CGT Lettings Limited | Real estate | 1987 |
| CGT Sales Ltd | Real estate | 2019 |
| CGT Stays Limited | Real estate | 2022 |
| CH Commerce Limited | Wholesale & retail | 2020 |
| CH Investment Group Limited | Real estate | 2024 |
| Chadwick Estates Limited | Construction | 2003 |
| Chainwise Consulting Limited | Professional & scientific | 2024 |
| Chakria Limited | Extraterritorial | 2012 |
| Chalfest Community Interest Company | Arts & recreation | 2016 |
| Chalkley Holdings Ltd | Households | 2019 |
| Chalkner VS LLP | | 2002 |
| Challenge Motor Company Limited | Wholesale & retail | 2003 |
| Challenge Tyres Limited | Wholesale & retail | 2012 |
| Chameleon AV Limited | Manufacturing | 2009 |
| Championing Social Care | Professional & scientific | 2024 |
| Chana Property Holdings Limited | Real estate | 2018 |
| Chance Glass Limited | Manufacturing | 1992 |
| CHANCE05 Ltd | Real estate | 2023 |
| Chances Ccfss Limited | Health & social care | 2010 |
| Chandolin Limited | Financial services | 2015 |
| Chandos Court (Winchcombe) Management Limited | Households | 1997 |
| Chandrans Investments Ltd | Real estate | 2024 |
| Change & Strategy International Ltd | Professional & scientific | 2016 |
| Change My Face Ltd | Information & communication | 2012 |
| Changing Places Toilets International | Professional & scientific | 2019 |
| Channel Telecom Limited | Information & communication | 2008 |
| Chapel House Limited | Health & social care | 2024 |
| Chapel Lane (Gorsley) Management Company Limited | Households | 2019 |
| Chapel View (Gorsley) Management Company Limited | Households | 2021 |
| Chapman RS Ltd | Information & communication | 2020 |
| Chapman Way Management Company Limited | Real estate | 2020 |
| Chappell Consultancy Limited | Real estate | 2007 |
| Chapsmith LLP | | 2006 |
| Chapter SIX Bar Ltd | Hospitality | 2026 |
| CHAPTER1 Salon Ltd | Other services | 2023 |
| Chardwar Gardens Residents Company Limited | Administrative & support | 1993 |
| Charella Gardens Limited | Wholesale & retail | 2013 |
| Chargrove Construction Ltd | Construction | 2006 |