| Christopher Wright Restoration Ltd | Construction | 2026 |
| Chrysalis Floristry Ltd | Wholesale & retail | 2017 |
| Chubb Computer Consultants Ltd | Information & communication | 2018 |
| Cider Mill Residents Company Limited | Households | 2021 |
| Cinemotive International Ltd | Wholesale & retail | 2019 |
| Cinqueterra Limited | Administrative & support | 2023 |
| Cityzen Consulting Limited | Professional & scientific | 2026 |
| CJB Management Limited | Professional & scientific | 2016 |
| CJN Property Investments Ltd | Real estate | 2021 |
| Clanwood Entertainment Limited | Hospitality | 2019 |
| Clare Hambro & Co. Ltd | Extraterritorial | 1998 |
| Clarence Gate Management Company Limited | Households | 2008 |
| Clarendon Place (Leamington Spa) Management Company Limited | Households | 2019 |
| Clarity Broadcast Limited | Information & communication | 2009 |
| Clarity Risk Management Limited | Professional & scientific | 2005 |
| Clark Land and Property Management LLP | | 2011 |
| Clarke & Greenwood Plumbing & Heating Limited | Construction | 2020 |
| Clarke Aquatics Ltd | Agriculture & fishing | 2025 |
| Clarke Banks (Building Control) Limited | Professional & scientific | 2013 |
| Clarke Banks (Building Safety) Limited | Construction | 2015 |
| Clarke Banks (Fire Engineering) Ltd | Professional & scientific | 2016 |
| Clarke Banks (Group) Ltd | Professional & scientific | 2016 |
| Clarke Banks (Health and Safety) Limited | Professional & scientific | 2016 |
| Clarke Builders Ltd | Construction | 2019 |
| Clarke Cross Builders Limited | Construction | 2005 |
| Clarke Electrical and Property Care Ltd | Construction | 2023 |
| Classic Vibes Ltd | Wholesale & retail | 2023 |
| Classics 1963 Ltd | Wholesale & retail | 2016 |
| Clean Mile Cleaning Services Ltd | Administrative & support | 2025 |
| Cleanpie Biological Technology Co., Ltd | Manufacturing | 2022 |
| Clear Skies Consulting (CSC) Ltd | Professional & scientific | 2014 |
| Cledlyn Villa Limited | Hospitality | 2008 |
| Clement Rabjohns Limited | Professional & scientific | 2010 |
| Clevebury Developments Limited | Construction | 2019 |
| Climate Spheres UK Limited | Professional & scientific | 2021 |
| Clipped Solutions Ltd | Professional & scientific | 2025 |
| Clive Champion Projects Limited | Professional & scientific | 2017 |
| Clopton Court Management Limited | Households | 1982 |
| Clopton House Limited | Households | 1995 |
| CMJ Bailey Limited | Financial services | 2023 |
| CO2 Compliance Services (UK) Limited | Information & communication | 2017 |
| Cocoalex Ltd | Transport & logistics | 2025 |
| Cocoon Factor Ltd | Professional & scientific | 2018 |
| Coffee Lounge 44 Limited | Hospitality | 2024 |
| Coles Educational Psychology Ltd | Health & social care | 2026 |
| Colewyn Ltd | Information & communication | 2024 |
| Collingdon Investments (Luton) Limited | Real estate | 1965 |
| Collinsfield Management Company Limited | Households | 2011 |
| Coming Clean Deep Clean Services Limited | Hospitality | 2014 |
| Communication in Business Limited | Administrative & support | 2001 |
| Complete Car Care Ltd | Manufacturing | 2020 |
| Complete Weed Control Cotswolds Limited | Other services | 2025 |
| Compliance & Testing Ltd | Wholesale & retail | 2024 |
| Compliance Point Limited | Wholesale & retail | 2026 |
| Computer Tune Ltd | Wholesale & retail | 2018 |
| Concetta & Lucia Bille Properties LLP | | 2017 |
| Conduit House (Avon Place) RTM Company Limited | Households | 2011 |
| Connectsu Limited | Information & communication | 2023 |
| Connor Brace Racing Limited | Arts & recreation | 2021 |
| Construction Tax & Finance Limited | Extraterritorial | 2025 |
| Containability Limited | Professional & scientific | 2015 |
| Control Marketing Management Ltd | Professional & scientific | 2015 |
| Cook & Rowe Ltd | Real estate | 2019 |
| Cookkin Ltd | Professional & scientific | 2025 |
| Cool Aesthetics Ltd | Health & social care | 2024 |
| Coombe Consult Limited | Professional & scientific | 2024 |
| Copperthwaite Mortgage Consultancy Limited | Other services | 2022 |
| Coppice Holidays LLP | | 2018 |
| Corn Mill Commercial Ltd | Real estate | 2020 |
| Cornmill Road Development Ltd | Construction | 2025 |
| Cornmill Yard Venue Ltd | Hospitality | 2026 |
| Cornwall House Management Limited | Real estate | 2001 |
| Corporate Debt Recovery Limited | Professional & scientific | 2024 |
| Cosyhomestay Ltd | Real estate | 2023 |
| Cotswold and Vale Healthcare and Counselling Limited | Health & social care | 2015 |
| Cotswold Bathing Company Ltd | Construction | 2021 |
| Cotswold Beauty Ltd | Other services | 2020 |
| Cotswold Blue Living Ltd | Wholesale & retail | 2021 |
| Cotswold Build (Chipping Campden) Ltd | Construction | 2009 |
| Cotswold Cabin Fever Limited | Hospitality | 2024 |
| Cotswold Comfort Care Ltd | Health & social care | 2025 |
| Cotswold Drainage Limited | Construction | 1997 |
| Cotswold Edge Developments Ltd | Construction | 2022 |
| Cotswold Edge Roofing Ltd | Construction | 2025 |
| Cotswold Elite Ltd | Construction | 2025 |
| Cotswold Equestrian Academy Community Interest Company | Health & social care | 2015 |
| Cotswold Executive Cabs and Tours (Broadway) Ltd | Transport & logistics | 2022 |
| Cotswold Farmer Limited | Manufacturing | 2019 |
| Cotswold Financial Limited | Professional & scientific | 2024 |
| Cotswold Flooring & Interiors Limited | Construction | 2015 |
| Cotswold Furniture Makers Ltd | Manufacturing | 2021 |
| Cotswold Hill Stone & Masonry Limited | Mining & quarrying | 2007 |
| Cotswold Holiday Retreats Ltd | Hospitality | 2024 |
| Cotswold Investment Group Ltd | Construction | 2025 |
| Cotswold Jewellery Ltd | Extraterritorial | 2021 |
| Cotswold Kitchen Supplies Ltd | Wholesale & retail | 2025 |
| Cotswold Memorials Limited | Extraterritorial | 2012 |
| Cotswold Oak Developments Limited | Construction | 2021 |
| Cotswold Oak Homes Limited | Construction | 2022 |
| Cotswold Oak Joinery & Design Limited | Manufacturing | 2019 |