| Cotswold Eco-Fuels Limited | Administrative & support | 2008 |
| Cotswold Edge Carpets Limited | Wholesale & retail | 2001 |
| Cotswold Exterior Surface Cleaning Ltd | Administrative & support | 2024 |
| Cotswold Fire Services Ltd | Public administration | 2019 |
| Cotswold Flavour Limited | Wholesale & retail | 2025 |
| Cotswold Holdings Ltd | Financial services | 2025 |
| Cotswold Homes Limited | Construction | 2002 |
| Cotswold Investors Ltd | Extraterritorial | 2022 |
| Cotswold Labels Limited | Wholesale & retail | 2011 |
| Cotswold Loft Insulation Ltd | Construction | 2022 |
| Cotswold Marine Ltd | Manufacturing | 2024 |
| Cotswold Medicals Limited | Health & social care | 1998 |
| Cotswold Recycling Company Limited | Water & waste | 2001 |
| Cotswold Road Ltd | Real estate | 2004 |
| Cotswold Road Management Company Limited | Households | 2013 |
| Cotswold Treatments (PP) Limited | Construction | 1984 |
| Cotswolds Waters Developments LLP | | 2022 |
| Cottage Kennels & Cattery Limited | Other services | 2017 |
| Cottage Kennels LLP | | 2022 |
| Cottage Riding Stables Limited | Other services | 2019 |
| Cottleston Holdings Limited | Financial services | 2015 |
| Cottleston Property Limited | Professional & scientific | 2015 |
| Cotton Smiles Limited | Wholesale & retail | 2014 |
| Cotton Tree Globe Services Ltd | Wholesale & retail | 2023 |
| COU COU Bristol Ltd | Manufacturing | 2023 |
| Coudray Consulting Limited | Other services | 2011 |
| Coulson House Management Co. Limited | Households | 1979 |
| Coulstreng Management Company Limited | Households | 2020 |
| Counter Culture Drinks Ltd | Manufacturing | 2021 |
| Counter Tech Ltd | Construction | 2015 |
| Counterhack Limited | Information & communication | 2009 |
| Countex Finance Ltd | Professional & scientific | 2020 |
| Countless Products Ltd | Wholesale & retail | 2019 |
| Country Collection Stoves & Fireplaces Limited | Wholesale & retail | 2014 |
| Country Developments (Bristol) Limited | Construction | 2005 |
| Country Haylage Ltd | Agriculture & fishing | 2016 |
| Country Property Services Limited | Real estate | 2021 |
| Country Threads Ltd | Wholesale & retail | 2024 |
| Countryside Capital Ltd | Administrative & support | 2018 |
| Countryside Developments (SW) Limited | Construction | 2016 |
| Countryways Construction Limited | Construction | 2004 |
| Countryways Groundworks & Landscapes Ltd | Construction | 2025 |
| County Contractors Ltd | Extraterritorial | 2025 |
| County Holding Group Limited | Financial services | 2024 |
| County in the Community | Education | 2015 |
| County Installation Services Limited | Construction | 2004 |
| County OTR Limited | Wholesale & retail | 2002 |
| County Property Limited | Real estate | 2024 |
| Coupland Insulation Limited | Construction | 2009 |
| Courage & Weeks Ltd | Professional & scientific | 2025 |
| Coure Security Ltd | Administrative & support | 2024 |
| Courier Comparison Ltd | Transport & logistics | 2019 |
| Coursepedia Limited | Information & communication | 2025 |
| Court Cocking Management Limited | Real estate | 2012 |
| Court DE Wyck Management Company Limited | Extraterritorial | 2021 |
| Court Farm Road (Bristol) Management Company Limited | Households | 2011 |
| Court Ross Financial Management Limited | Financial services | 1987 |
| Court View (2014) Management Company Limited | Households | 2014 |
| Courtfield Healthcare Limited | Administrative & support | 2011 |
| Courtfield Homes Limited | Real estate | 1996 |
| Courtfield Property Group Ltd | Financial services | 2025 |
| Courtice Auto Repairs Ltd | Wholesale & retail | 2026 |
| Courtlive Ltd | Other services | 2022 |
| Courtney Havers Holdings Limited | Financial services | 2024 |
| Courtney Place Ltd | Households | 2025 |
| Courtstall Services (Midlands) Limited | Professional & scientific | 1995 |
| Courtstall Services (South West) Limited | Professional & scientific | 1995 |
| Courtyard Two Management Company Limited | Real estate | 1996 |
| Cousas Films Ltd | Information & communication | 2020 |
| Coush Ltd | Transport & logistics | 2025 |
| Couture PR Limited | Professional & scientific | 2013 |
| Couzens Property Solutions Ltd | Construction | 2016 |
| Cove Roofing Ltd | Construction | 2026 |
| Coven Hair Ltd | Other services | 2023 |
| Covenant Industries Limited | Manufacturing | 2025 |
| Cover Clinic Limited | Health & social care | 1997 |
| Coverall Roofing Ltd | Construction | 2016 |
| Covered Legal Group Ltd | Administrative & support | 2023 |
| Covertek Construction Ltd | Construction | 2014 |
| Covestone Real Estate Limited | Construction | 2025 |
| Coveya Holdings Ltd | Financial services | 2020 |
| Coveya Limited | Administrative & support | 2013 |
| COW & SOW (Bristol) Limited | Hospitality | 2021 |
| COW Barn Limited | Hospitality | 2025 |
| COW Plan Limited | Wholesale & retail | 2014 |
| Cowan Data Services Limited | Information & communication | 2023 |
| Cowbridge Mill Management Company Limited | Households | 2008 |
| Cowell Mobility Limited | Information & communication | 2024 |
| Cowen & Co. Limited | Professional & scientific | 2007 |
| Cowleaze Path Apartments Limited | Households | 2025 |
| Cowper Projects Limited | Real estate | 2007 |
| Cowski Ltd | Wholesale & retail | 2024 |
| COX & Co. Payroll Solutions Ltd | Professional & scientific | 2008 |
| COX Architectural Consultancy Limited | Professional & scientific | 2003 |
| COX Bros Limited | Wholesale & retail | 2009 |
| Coxswain Capital Limited | Financial services | 2021 |
| Coyne & Sons Ltd | Construction | 2007 |
| Coyote Ugly Camden Limited | Hospitality | 2021 |
| Cozie Homes Ltd | Real estate | 2026 |
| Cozoptions LLP | | 2010 |