| Carreg TEC Limited | Mining & quarrying | 2015 |
| Cars Perfection Limited | Wholesale & retail | 2024 |
| Casa Concept Interiors Ltd | Professional & scientific | 2026 |
| Caskandcountrycomps Limited | Arts & recreation | 2026 |
| Cass Hayward LLP | | 2004 |
| Castle Chiropractic Centre Ltd | Public administration | 2024 |
| Castle Tipis Ltd | Administrative & support | 2024 |
| Castle View Chepstow Holdings Limited | Financial services | 2019 |
| Castle View Chepstow Limited | Hospitality | 2006 |
| Cbtf Properties Limited | Real estate | 2024 |
| CC Endodontics Limited | Health & social care | 2024 |
| CC Mortgages Limited | Financial services | 2021 |
| Cc&G Ltd | Hospitality | 2025 |
| Celtic Terahertz Technology Limited | Manufacturing | 2022 |
| Celtic Trails Limited | Arts & recreation | 2011 |
| Celyn Consultancy Ltd | Professional & scientific | 2026 |
| Certus Construction Limited | Construction | 2013 |
| Certus Construction Services Limited | Administrative & support | 2015 |
| Certus Facilities Limited | Construction | 2025 |
| Certus Screeding & Underfloor Heating Limited | Construction | 2019 |
| Cfsk Consulting Ltd | Information & communication | 2013 |
| Challenger 2 Ltd | Transport & logistics | 2017 |
| Champagne & Sparkling Wine World Championships Limited | Professional & scientific | 2012 |
| Champions Haulage Ltd | Transport & logistics | 2019 |
| Chaperone IT Ltd | Information & communication | 2025 |
| Charles Brooks Ltd | Construction | 2019 |
| Charleyfrank Limited | Health & social care | 2017 |
| Chase Trading Ltd. | Manufacturing | 2014 |
| Chassis Scan Ltd | Administrative & support | 2021 |
| Checkpoint Properties Ltd | Real estate | 2019 |
| Chemfast Ltd | Wholesale & retail | 2018 |
| Chepstow Access Ltd | Manufacturing | 2012 |
| Chepstow Accountancy Services Limited | Professional & scientific | 2013 |
| Chepstow and District Mencap Society | Health & social care | 1995 |
| Chepstow Art Space Limited | Manufacturing | 2023 |
| Chepstow Automotive Ltd | Wholesale & retail | 2026 |
| Chepstow Barriers Limited | Construction | 2021 |
| Chepstow Boat Club Ltd | Other services | 2011 |
| Chepstow Cafe Ltd | Hospitality | 2025 |
| Chepstow Campers and Builders Limited | Manufacturing | 2025 |
| Chepstow Car Sales Ltd | Wholesale & retail | 2025 |
| Chepstow Driveways and Landscaping Ltd | Construction | 2023 |
| Chepstow Driveways Ltd | Construction | 2023 |
| Chepstow Gold Ltd | Wholesale & retail | 2025 |
| Chepstow Hair Studio Ltd | Other services | 2025 |
| Chepstow Home & Leisure Limited | Wholesale & retail | 2007 |
| Chepstow House Clearance Ltd | Transport & logistics | 2024 |
| Chepstow Investments Limited | Real estate | 2003 |
| Chepstow Motors Limited | Wholesale & retail | 2017 |
| Chepstow Pet Supplies Ltd | Wholesale & retail | 2012 |
| Chepstow Plantaria Limited | Wholesale & retail | 2002 |
| Chepstow Property Co Management Ltd | Construction | 2021 |
| Chepstow Property Co. Limited | Construction | 2010 |
| Chepstow Small Business Accountants Ltd | Professional & scientific | 2012 |
| Chepstow Storage Ltd | Transport & logistics | 2021 |
| Chepstow Surfacing Ltd | Construction | 2024 |
| Chepstow Technology Limited | Professional & scientific | 2019 |
| Chepstow Therapy Ltd | Wholesale & retail | 2011 |
| Chepstow Transportation Services Limited | Administrative & support | 2022 |
| Chestnut Grove (Chepstow) Management Limited | Real estate | 1994 |
| Chidley Group Limited | Wholesale & retail | 2024 |
| Chillifrog Ltd | Administrative & support | 2013 |
| Chinchex UK Ltd | Wholesale & retail | 2025 |
| Chris Scroggs Legal Services Limited | Other services | 2022 |
| Cimex Store Ltd | Professional & scientific | 2018 |
| Cinesys Emea Ltd | Information & communication | 2026 |
| CJ Propertyco Ltd | Real estate | 2025 |
| Classic Aroma Cafe Ltd | Hospitality | 2025 |
| Cleaner Space Commercial Ltd | Administrative & support | 2022 |
| Clearwater Financial Solutions Limited | Financial services | 2003 |
| Clifton & Co. Commercial Management Ltd | Professional & scientific | 2025 |
| Clifton Leasing | | 1988 |
| Clifton Skin & Beauty Ltd | Other services | 2006 |
| Cloak Room CIC | Hospitality | 2021 |
| Cloud Storm Limited | Information & communication | 2016 |
| Cloudwarepro Ltd | Information & communication | 2015 |
| Clsd Properties Limited | Real estate | 2025 |
| Clydeborn Limited | Financial services | 2014 |
| CNC U.K. Ltd | Professional & scientific | 2023 |
| Coachtree Ltd | Agriculture & fishing | 2022 |
| Coates Physiotherapy Clinic Ltd | Health & social care | 2004 |
| Codebo Limited | Real estate | 2015 |
| Colin Hughes Project Planning Ltd. | Professional & scientific | 2013 |
| Collins Family Holdings Ltd | Hospitality | 2018 |
| Coltwise Limited | Information & communication | 1989 |
| Common Ground Media Limited | Information & communication | 2024 |
| Community for Allied Health Professions Research CIC | Health & social care | 2024 |
| Commusication Ltd | Arts & recreation | 2012 |
| Compass Aviation Services Limited | Transport & logistics | 2016 |
| Compose Management Limited | Administrative & support | 2012 |
| Composite Metal Flooring Limited | Construction | 2017 |
| Composite Shear Connectors Limited | Construction | 2014 |
| Conference Connections Limited | Professional & scientific | 2001 |
| Conharfin Limited | Construction | 2008 |
| Conslab Ltd | Construction | 2016 |
| Construction Metal Framing Limited | Construction | 2017 |
| Construction Metal Sales Limited | Construction | 2017 |
| Consulting EGG Limited | Information & communication | 2017 |
| Coombe LEA (Catbrook) Management Limited | Households | 1999 |
| Copper Phoenix Limited | Professional & scientific | 2009 |