| Cooper Knowles Limited | Professional & scientific | 2023 |
| Cooper Richards Ltd | Professional & scientific | 2003 |
| Cooper Social Reporting Consultancy Limited | Professional & scientific | 2005 |
| Cooperflack Limited | Professional & scientific | 2022 |
| Coopers Stores (Bath) Limited | Wholesale & retail | 2007 |
| Copia Capital Management Limited | Financial services | 2022 |
| Copper Catering Limited | Hospitality | 2020 |
| Coppice Hill Limited | Financial services | 2024 |
| Coppola Brothers Limited | Manufacturing | 2022 |
| Cord Construction Ltd | Construction | 2014 |
| Cordiality Ltd | Wholesale & retail | 2022 |
| Cordier Developments Limited | Professional & scientific | 2005 |
| Cordillera Music & Arts Ltd | Information & communication | 2019 |
| Core Media Group Ltd | Information & communication | 2025 |
| CORE3 Group Ltd | Administrative & support | 2022 |
| Corkage (Chapel ROW) Ltd | Hospitality | 2017 |
| Corkage (Holdings) Ltd | Hospitality | 2017 |
| Corndon Cottage Company Limited | Hospitality | 2007 |
| Cornflower House Limited | Financial services | 2023 |
| Cornish Motors Limited | Manufacturing | 2009 |
| Cornock & Sons Limited | Agriculture & fishing | 1985 |
| Cornwell Mckeown Associates Limited | Professional & scientific | 2011 |
| Corplex Limited | Administrative & support | 2009 |
| Corporate PPA Limited | Professional & scientific | 2023 |
| Corrie Eight Ltd | Real estate | 2020 |
| Corsham Taxis Limited | Transport & logistics | 2013 |
| Corston Community Orchard CIC | Agriculture & fishing | 2021 |
| Corston Vineyard Estate Limited | Manufacturing | 2015 |
| Cortado Cafe Ltd | Hospitality | 2019 |
| Cortek Properties Ltd | Real estate | 2022 |
| Cortex Global Trading Limited | Professional & scientific | 2021 |
| Corvette Rengen Armourers Holdings Limited | Real estate | 2023 |
| Corvette Rengen Armourers Limited | Real estate | 2023 |
| Corvette Rengen Bournemouth Holdings Limited | Real estate | 2023 |
| Corvette Rengen Frome Holdings Limited | Real estate | 2023 |
| Corvette Rengen Frome House Limited | Real estate | 2022 |
| Corvette Rengen Hanover Limited | Real estate | 2023 |
| Corvette Rengen Holdings Limited | Real estate | 2022 |
| Corvette Rengen Munden Lettings Limited | Real estate | 2023 |
| Corvette Rengen Munden Limited | Real estate | 2022 |
| Corvette Rengen Redcliff Limited | Real estate | 2022 |
| Corvette Rengen ST James Limited | Real estate | 2023 |
| Corvette Rengen ST Nicholas Holdings Limited | Real estate | 2024 |
| Corvette Rengen ST Nicholas Limited | Real estate | 2024 |
| Corvette Rengen SWH Holdings Limited | Real estate | 2024 |
| Corvette Rengen SWH Limited | Real estate | 2024 |
| Corvette Rengen Unity Limited | Real estate | 2022 |
| Corvette Rengen Wells Limited | Real estate | 2022 |
| Corvette Rengen Whiteladies Limited | Real estate | 2022 |
| Cosmeticsbycarvella Ltd | Other services | 2025 |
| Cosmic Computers Ltd | Information & communication | 2019 |
| Cosmos High Tech Ltd | Wholesale & retail | 2014 |
| Cotswold Chiropractic Centre Ltd | Health & social care | 2023 |
| Cotswold Fleet Limited | Administrative & support | 2023 |
| Cotswolds Hosting Limited | Real estate | 2026 |
| Cotterell & Cotterell Commercial Finance Limited | Financial services | 2020 |
| Cotterhill Consulting Limited | Professional & scientific | 2024 |
| Cotton and Townend Ltd | Households | 2009 |
| Cottongrass Ltd | Real estate | 2023 |
| Couch UK Ltd | Manufacturing | 2002 |
| Coughsense Limited | Manufacturing | 2025 |
| Countertops Limited | Manufacturing | 1972 |
| Country Garden Day Nursery Limited | Real estate | 2019 |
| Country Road Limited | Real estate | 2013 |
| Court Four Ltd | Information & communication | 2014 |
| Courtney Management Solutions Ltd | Professional & scientific | 2011 |
| Courtside Limited | Professional & scientific | 2011 |
| Courtyard One Management Company Limited | Professional & scientific | 1989 |
| Cove Software Limited | Information & communication | 2018 |
| COW Events Limited | Professional & scientific | 2007 |
| Cowork Inc Limited | Hospitality | 2011 |
| Coworking Bath C.I.C. | Administrative & support | 2012 |
| Cowshed Catering Limited | Hospitality | 2025 |
| Cowslip Ltd | Professional & scientific | 2021 |
| Cowslip Music Ltd | Information & communication | 2024 |
| Coyle Timber Limited | Manufacturing | 2014 |
| Coyne & Associates Limited | Administrative & support | 2016 |
| CP Strategy and Advisory Ltd | Professional & scientific | 2026 |
| Cp&Hc Limited | Wholesale & retail | 2022 |
| Cpna Ltd | Professional & scientific | 2020 |
| Cpp.Ai Limited | Information & communication | 2024 |
| CQ Consultancy Limited | Professional & scientific | 2005 |
| CR Builders (Bath) Limited | Construction | 2016 |
| Cradle Lettings Ltd | Real estate | 2020 |
| Crafted Clothing UK Ltd | Wholesale & retail | 2025 |
| Crafty AF Ltd | Wholesale & retail | 2019 |
| Crampsey Pharma Limited | Wholesale & retail | 2025 |
| Cranleigh Farm Ltd | Agriculture & fishing | 2017 |
| Cranmore Academy LLP | | 2010 |
| Crau Services Limited | Public administration | 2022 |
| Crave Club Collective Ltd | Hospitality | 2026 |
| Crazy Nachos Ltd | Hospitality | 2025 |
| CRC Flooring Limited | Construction | 2011 |
| Creanova Universal Closures Limited | Manufacturing | 2004 |
| Create to Elevate Ltd | Professional & scientific | 2025 |
| Creative Bath Community Interest Company | Other services | 2009 |
| Creative Economy Team Ltd | Administrative & support | 2021 |
| Creative Goldfish Limited | Wholesale & retail | 2018 |
| Creative Ideas Studio Ltd | Professional & scientific | 2025 |
| Creatorsphere Limited | Information & communication | 2026 |