| Coupes and Convertibles Limited | Wholesale & retail | 2004 |
| Coventry Crane Hire Limited | Extraterritorial | 2013 |
| Cowley Ludlow Investments Limited | Financial services | 2025 |
| Cpl@Jlrengineeringltd Limited | Manufacturing | 2017 |
| Cradley Demolition & Waste Services Limited | Construction | 2016 |
| Cradley Enterprise Centre Limited | Real estate | 2010 |
| Cradley Play Limited | Education | 2026 |
| Cradley Self Store Limited | Real estate | 2023 |
| Cradley Town Football Club Limited | Extraterritorial | 2003 |
| Craig Brooker Maintenance Limited | Construction | 2013 |
| Craigs Couriers Limited | Transport & logistics | 2026 |
| Crainstallations Limited | Manufacturing | 2015 |
| Crantonbridge Real Estate Limited | Real estate | 2018 |
| Crcj Solutions Limited | Transport & logistics | 2019 |
| Create a Future Ltd | Education | 2001 |
| Creativ Worx Limited | Professional & scientific | 2016 |
| Creativation Community Ventures CIC | Education | 2010 |
| Creative Digital Life Limited | Information & communication | 2022 |
| Creative Health Innovations Limited | Extraterritorial | 2021 |
| Creators Wealth Club Ltd | Wholesale & retail | 2025 |
| Creedpoint (Portugal) Limited | Real estate | 2013 |
| Creedpoint Limited | Real estate | 1988 |
| Cremin Construction Limited | Construction | 2011 |
| Cricket Stumps Limited | Arts & recreation | 2026 |
| Cromwell Court (Stepaside) Management Company Limited | Households | 1993 |
| Crosland Cutters Group Limited | Financial services | 2019 |
| Cross Street Properties Limited | Real estate | 2014 |
| Crossflatts Properties Limited | Real estate | 2023 |
| Crotel Limited | Professional & scientific | 2004 |
| Crotel Management Limited | Real estate | 1980 |
| Crow Engineering Services Ltd | Professional & scientific | 2007 |
| Crowd Pull Ltd | Professional & scientific | 2024 |
| Crown Jules Ventures Ltd. | Real estate | 2017 |
| Crown Property Developments Limited | Construction | 2022 |
| Crownworks 9 Ltd | Real estate | 2019 |
| Crsw Buildings Limited | Real estate | 2025 |
| Crtms Ltd | Construction | 2025 |
| Crystal - Heart Lettings Ltd | Administrative & support | 2018 |
| CS Electrical Limited | Construction | 2018 |
| Csaba Ltd | Transport & logistics | 2017 |
| CTB Civil Engineering Ltd | Construction | 2019 |
| CTS Design Limited | Professional & scientific | 2011 |
| Cubicle Solutions Limited | Manufacturing | 2005 |
| Cuebalm Limited | Manufacturing | 2026 |
| Cult of Oak Limited | Manufacturing | 2021 |
| Cundy Industrial Supplies Limited | Wholesale & retail | 2025 |
| Currellmeyer Ltd | Professional & scientific | 2025 |
| Curzon Retail Exhibition and Marketing Limited | Administrative & support | 2012 |
| Custom Technology Solutions Limited | Administrative & support | 1996 |
| Customeric Consulting LLP | | 2019 |
| Cutter & Co Limited | Professional & scientific | 2010 |
| Cutter Business Services Limited | Administrative & support | 2024 |
| Cutthroat Studios Ltd | Wholesale & retail | 2017 |
| Cutwood (UK) Ltd | Manufacturing | 2014 |
| CV35MH Consulting Limited | Administrative & support | 2025 |
| Cvmcp Consulting Limited | Professional & scientific | 2016 |
| Cyanti Limited | Manufacturing | 2010 |
| Cyber & Cobb @ Shell Corner Limited | Hospitality | 2023 |
| Cyber Sharp I.T Limited | Information & communication | 2017 |
| Cyberfreak Software Limited | Information & communication | 2025 |
| Cyclax Limited | Manufacturing | 1994 |
| Cyrus Investments SME Ltd | Wholesale & retail | 2023 |
| D & P VPP Ltd | Extraterritorial | 2009 |
| D Abdo TM Ltd | Construction | 2022 |
| D and a Complete Services Ltd | Construction | 2018 |
| D K Lifestyles Ltd | Extraterritorial | 2021 |
| D M Horan Limited | Hospitality | 2026 |
| D M Services (Midlands) Limited | Administrative & support | 2003 |
| D N Surveyors Limited | Administrative & support | 2009 |
| D T B Holdings Limited | Financial services | 2016 |
| D W Utilities Midland Limited | Construction | 2025 |
| D&D Davies Ltd | Professional & scientific | 2016 |
| D.B.V. Construction Limited | Construction | 2016 |
| D.C.P. Roofing Ltd | Construction | 2021 |
| D.O Flooring Ltd | Construction | 2013 |
| D.T.S. Computer Print Limited | Information & communication | 1978 |
| D44 Enterprise Limited | Financial services | 2025 |
| DAB Investment Group Limited | Real estate | 2021 |
| Dagar Tools Limited | Wholesale & retail | 1986 |
| Dahab Accommodations Ltd | Real estate | 2021 |
| DAK Land and Assets Ltd | Real estate | 2026 |
| Dalbury Property Group Ltd | Real estate | 2019 |
| Dalforth Consulting Ltd. | Administrative & support | 2023 |
| Dance-X-Treme Limited | Education | 2010 |
| Dancers Hirewear Limited | Wholesale & retail | 2022 |
| Dancers Limited | Wholesale & retail | 1936 |
| Daneways Limited | Construction | 1999 |
| Daniel-Scott Recruitment Ltd | Administrative & support | 2020 |
| Danny P Property Ltd | Real estate | 2024 |
| Danopher Limited | Real estate | 2016 |
| Dansam Group Limited | Real estate | 2026 |
| Danyal Recovery Ltd | Transport & logistics | 2025 |
| Darren Byng Limited | Other services | 2024 |
| Dartash Limited | Manufacturing | 2025 |
| Datacom Vehicle Power Control Systems Ltd | Wholesale & retail | 2015 |
| Datanet Services Ltd | Information & communication | 2025 |
| DAU Consulting Ltd | Professional & scientific | 2019 |
| Dave's Autocare (Holdings) Ltd | Financial services | 2013 |
| Dave's Autocare Ltd | Wholesale & retail | 2013 |
| Davenports Brewery Limited | Manufacturing | 2009 |