| Coman Construct Limited | Construction | 2026 |
| Comexstra Limited | Professional & scientific | 2018 |
| Commercial and Domestic Limited | Construction | 2003 |
| Community First Partnership Limited | Professional & scientific | 2003 |
| Company 8 Ltd | Construction | 2008 |
| Compass Rufford Ltd | Other services | 2025 |
| Compass Wealth Management (UK) Limited | Professional & scientific | 2010 |
| Comple Ltd | Professional & scientific | 2025 |
| Complete Flue Installations Limited | Construction | 2015 |
| Completelink Limited | Health & social care | 1985 |
| Compliance 100 Facilities Management Ltd | Professional & scientific | 2024 |
| Compliance 100 Group Ltd | Financial services | 2024 |
| Compliance 100 Ltd | Professional & scientific | 2019 |
| Comply Health Ltd | Administrative & support | 2017 |
| Composite Air Management Limited | Manufacturing | 2017 |
| Comveco Limited | Extraterritorial | 2010 |
| CON WIN Limited | Real estate | 2012 |
| Concept Covers Limited | Manufacturing | 1999 |
| Concept Electrical Consulting Limited | Professional & scientific | 2023 |
| Concept Electrical Fire & Security Limited | Construction | 2022 |
| Concept Seating Limited | Manufacturing | 2003 |
| Concrete Evolution Limited | Construction | 2019 |
| Connect Business Systems (Telecommunications) Limited | Information & communication | 2010 |
| Connecting ALL Limited | Real estate | 2025 |
| Connecting Learning Ltd | Education | 2010 |
| Conquest Land & Property Limited | Real estate | 2017 |
| Conrady Ltd | Wholesale & retail | 2025 |
| Consort Craftsmen Limited | Real estate | 1990 |
| Constant Heating Limited | Professional & scientific | 2017 |
| Construct AD Ltd | Construction | 2022 |
| Construct MEP Ltd | Construction | 2007 |
| Consult MEP Ltd. | Administrative & support | 2024 |
| CONSULT8IT Limited | Information & communication | 2017 |
| Contemporary Planters Ltd | Manufacturing | 2020 |
| Content Craftsman Ltd | Information & communication | 2023 |
| Contracting Works Limited | Professional & scientific | 2018 |
| Conveyxpress Ltd | Wholesale & retail | 2023 |
| Cooksey's Estates Limited | Real estate | 1937 |
| Cooper-Perks Limited | Other services | 1967 |
| Copper Parrot Limited | Extraterritorial | 2023 |
| Corbetts Motor Company Limited | Wholesale & retail | 1982 |
| Cordwell (Arundel Gate) Limited | Construction | 2007 |
| Core Flylines Ltd | Manufacturing | 2022 |
| Cornerstone Childcare Ltd | Extraterritorial | 2023 |
| Cornerstone Marketing Limited | Professional & scientific | 2007 |
| Cornish View Holidays Ltd | Hospitality | 2022 |
| Coronation House Property Services Limited | Professional & scientific | 2017 |
| Corporate Management UK Limited | Information & communication | 2020 |
| Corser Ltd | Real estate | 2020 |
| Corsets and Cuffs Ltd | Wholesale & retail | 2009 |
| COS - Serve Limited | Health & social care | 2011 |
| Cosegrainge Management Limited | Households | 2017 |
| Cosima Kitchens Limited | Manufacturing | 2018 |
| Cosyogis Ltd | Wholesale & retail | 2022 |
| COT Lane (the Woodlands) Residents Limited | Households | 1975 |
| Cotswold Insulation Supplies Ltd | Wholesale & retail | 2024 |
| Cotton Securities Holdings Limited | Financial services | 2023 |
| Cottonage Limited | Wholesale & retail | 2015 |
| Counterpoise Limited | Administrative & support | 2004 |
| Country Barn Estates Ltd | Construction | 2023 |
| Country Paving & SON Ltd | Construction | 2025 |
| County Pharmacy Limited | Wholesale & retail | 1971 |
| County Sports & Schoolwear Ltd | Wholesale & retail | 2023 |
| County Sports Hagley Limited | Wholesale & retail | 2005 |
| Courtside P Ltd | Arts & recreation | 2025 |
| Courtyard Escapes Ltd | Information & communication | 2020 |
| Courtyardworcester Ltd | Hospitality | 2020 |
| Cove Residential Care Ltd | Health & social care | 2025 |
| Coven Chippy Ltd | Hospitality | 2026 |
| Coven Metals Ltd | Wholesale & retail | 2014 |
| Cowdy Consulting Limited | Professional & scientific | 2024 |
| Coyne Associates Ltd | Extraterritorial | 2014 |
| CPF Properties Ltd | Real estate | 2022 |
| Cpima Limited | Real estate | 2022 |
| CPK ( Midlands ) Limited | Manufacturing | 2005 |
| CPW Consultants Limited | Information & communication | 2020 |
| CR8 UK Limited | Construction | 2025 |
| Craddock Brewery Ltd | Hospitality | 2013 |
| Craddock's Good Intent CIC | Hospitality | 2019 |
| Cradley Property Developments Limited | Households | 1927 |
| Cradley Town Football & Social Club Limited | Arts & recreation | 2018 |
| Craft Bars Inc. Limited | Hospitality | 2026 |
| Craftlogic Systems Limited | Information & communication | 2025 |
| Crafty Wings Limited | Hospitality | 2025 |
| Craving Box Bites Ltd | Hospitality | 2026 |
| Creatif Concepts Ltd | Administrative & support | 2014 |
| Creative Active Lives CIC | Education | 2019 |
| Creative Corridors Ltd | Professional & scientific | 2022 |
| Creative Education Consultancy Limited | Professional & scientific | 2014 |
| Creative Gardening Solutions Ltd | Administrative & support | 2011 |
| Creative Orbit Ltd | Arts & recreation | 2019 |
| Credenda Properties Limited | Hospitality | 2009 |
| Cresco Land and Developments Limited | Real estate | 2026 |
| Cresthold Commerce Ltd | Transport & logistics | 2021 |
| Cretan Ltd | Hospitality | 2022 |
| Crimson Letters Limited | Arts & recreation | 2019 |
| Crofter Homes Limited | Construction | 2010 |
| Cromox UK Limited | Wholesale & retail | 2024 |
| Croppers (Hair Design) Limited | Other services | 1977 |
| Cross Street Holdings Limited | Real estate | 2025 |