| Cornwallis House Management Company Limited | Households | 1984 |
| Corofin Associates Limited | Information & communication | 2016 |
| Coromandel Heights Maintenance Company Limited | Households | 1983 |
| Coronation Centre CIC | Public administration | 2023 |
| Coronation Management Ltd | Households | 2006 |
| Coronation Wealth Management LLP | | 2018 |
| Corpman (UK) Ltd. | Professional & scientific | 2002 |
| Corporacare Limited | Administrative & support | 1985 |
| Corporate Appointments Limited | Professional & scientific | 1996 |
| Corporate Beverage Solutions Ltd | Wholesale & retail | 2006 |
| Corporate Business Specialists Limited | Administrative & support | 2012 |
| Corporate Citizenship Limited | Professional & scientific | 1997 |
| Corporate Commercial Surveyors Limited | Administrative & support | 2017 |
| Corporate Contracting Services Limited | Administrative & support | 2012 |
| Corporate Karma Ltd | Information & communication | 2018 |
| Correction | Financial services | 2018 |
| Correleat Ltd | Information & communication | 2026 |
| Corrigan Accountants Limited | Professional & scientific | 2018 |
| Corrigan Associates Bristol Limited Liability Partnership | | 2008 |
| Corsan Consulting Limited | Information & communication | 1989 |
| Corsham Schoolboy Scramble Club Limited | Arts & recreation | 2000 |
| Corston Medical Ltd | Health & social care | 2019 |
| Cortex Imaging Ltd | Health & social care | 2022 |
| Cortinal Limited | Real estate | 2008 |
| Cortus Trading Limited | Wholesale & retail | 2015 |
| Coruisk Consulting Limited | Professional & scientific | 2017 |
| Coruisk Enterprises Limited | Health & social care | 2021 |
| Corvara Projects Limited | Construction | 2018 |
| Corvell Ltd | Construction | 2024 |
| Corvus (UK) Ltd | Extraterritorial | 2023 |
| Corvus Trading Limited | Wholesale & retail | 2019 |
| Coryknight Plumbing and Heating Ltd | Construction | 2025 |
| COS Holdings Limited | Financial services | 2025 |
| Cosan Datastore Limited | Financial services | 2020 |
| Cosear Ltd | Real estate | 2026 |
| Cosfree Ltd | Real estate | 2020 |
| Cosmetic Perfume Shop Ltd | Wholesale & retail | 2024 |
| Cosmetics Republic (Bristol) Ltd | Wholesale & retail | 2019 |
| Cosmetology Ltd | Other services | 2024 |
| Cosmic Dragon Films Limited | Information & communication | 2026 |
| Cosmic Entertainment Ltd | Education | 2018 |
| Cosmic Hygiene Limited | Administrative & support | 2019 |
| Cosmic Networks Limited | Information & communication | 2005 |
| Cosmic Repairs Bristol Ltd | Wholesale & retail | 2025 |
| Cosmin EPU Ltd | Transport & logistics | 2021 |
| Cosmin Miron Transport Limited | Transport & logistics | 2018 |
| Cosmin Track Ltd | Transport & logistics | 2016 |
| Cosmos Technology Ltd | Professional & scientific | 2013 |
| Cost Estimating Services Limited | Professional & scientific | 2002 |
| Costa Installations Limited | Administrative & support | 2018 |
| Costafitness Ltd | Administrative & support | 2020 |
| Costantino Trans Ltd | Transport & logistics | 2014 |
| Costas Vinieratos Limited | Administrative & support | 2015 |
| Costcutter Filton Avenue Ltd. | Wholesale & retail | 2012 |
| Costel Plumbing Ltd | Construction | 2024 |
| Costel Transport Ltd | Transport & logistics | 2016 |
| COSTEL87 Limited | Transport & logistics | 2019 |
| Costello Consultancy Ltd | Professional & scientific | 2024 |
| Costers Close Management Company Limited | Households | 2021 |
| Costless Avonmouth Ltd | Wholesale & retail | 2020 |
| Costume Designer UK Ltd | Arts & recreation | 2020 |
| Costumefilmstock Ltd | Arts & recreation | 2023 |
| Costumes R US Ltd | Wholesale & retail | 2012 |
| Costy Logistics Ltd | Transport & logistics | 2022 |
| Cosu Limited | Hospitality | 2017 |
| Cosy Campers (Bristol) Ltd | Administrative & support | 2022 |
| Cosy Compass Ltd | Real estate | 2025 |
| Cosy Scents Ltd | Wholesale & retail | 2023 |
| Cotdean Management Limited | Administrative & support | 1981 |
| Cote House Ltd | Construction | 2025 |
| Cote Property Ltd | Real estate | 2019 |
| Cotfield Homes Limited | Real estate | 2007 |
| Cotham Cafe Ltd | Hospitality | 2012 |
| Cotham Cheese Company Limited | Wholesale & retail | 2026 |
| Cotham Consulting Ltd | Administrative & support | 2019 |
| Cotham Estates Limited | Real estate | 2006 |
| Cotham Gardens Primary School Ltd | Education | 2012 |
| Cotham Lawn Limited | Real estate | 2009 |
| Cotham Management Company Ltd | Households | 2003 |
| Cotham Optical Consultancy Ltd | Professional & scientific | 2024 |
| Cotham Park Mansions Limited | Administrative & support | 1975 |
| Cotham Park Tennis Club | Arts & recreation | 2015 |
| Cotham Practice Management Limited | Administrative & support | 2007 |
| Cotham Properties Ltd | Real estate | 2015 |
| Cotham Roofing Limited | Construction | 2024 |
| Cotham Technologies Limited | Professional & scientific | 2012 |
| COTO65LC Ltd | Construction | 2024 |
| COTOSL1A2 Ltd | Construction | 2025 |
| Cotswold Agricultural Centre Limited | Real estate | 2004 |
| Cotswold Build SW Ltd | Construction | 2025 |
| Cotswold Cardiology Limited | Health & social care | 2010 |
| Cotswold Carpentry & Build Ltd | Manufacturing | 2023 |
| Cotswold Carriage Company Ltd | Wholesale & retail | 2019 |
| Cotswold Christmas Trees Limited | Wholesale & retail | 2025 |
| Cotswold Commercial Management Ltd | Professional & scientific | 2011 |
| Cotswold Community Association | Other services | 2017 |
| Cotswold Confidential Ltd | Real estate | 2021 |
| Cotswold Copy Limited | Professional & scientific | 2022 |
| Cotswold Country Cottages Ltd | Hospitality | 2021 |
| Cotswold Drum Company Ltd | Manufacturing | 2020 |