| Creative Technics Ltd | Manufacturing | 2020 |
| Creatos Media Ltd | Information & communication | 2018 |
| Credit Hire Consultants Limited | Professional & scientific | 2017 |
| Credo Associates Limited | Information & communication | 2013 |
| Creekside Boatyard Limited | Manufacturing | 1970 |
| Crf-I Limited | Administrative & support | 2014 |
| CRG Short Term Rentals Ltd | Hospitality | 2026 |
| CRJ Property Developers Ltd | Financial services | 2022 |
| Croft Consulting Limited | Professional & scientific | 2006 |
| Croft Direct Ltd | Wholesale & retail | 2018 |
| Crown Computing Group Limited | Other services | 2017 |
| Crown Computing Limited | Information & communication | 1987 |
| Crown Couriers Limited | Transport & logistics | 1992 |
| Crown Fabrications & Installations Ltd | Manufacturing | 2008 |
| Crown Mail Limited | Transport & logistics | 2013 |
| Crown Management Consultancy Ltd | Professional & scientific | 2026 |
| Crown SDS Limited | Information & communication | 2021 |
| Crown Superior Enterprises Ltd | Wholesale & retail | 2021 |
| Crowned Creations Limited | Wholesale & retail | 2025 |
| Crucial COG Limited | Professional & scientific | 2019 |
| CRW Electrical Services Limited | Construction | 2019 |
| Crypto Saving Expert Limited | Professional & scientific | 2023 |
| Crystal Business Finance Group Ltd | Financial services | 2024 |
| Crystal Business Finance Limited | Financial services | 2007 |
| Crystal Flame Ltd | Manufacturing | 2020 |
| Crystal Mortgages Limited | Financial services | 2002 |
| Crystal Property Finance Limited | Financial services | 2024 |
| Crystal Specialist Group Limited | Financial services | 2018 |
| Crystal Water Technology Ltd | Water & waste | 2017 |
| CS Electrical Solutions (Midlands) Limited | Construction | 2025 |
| CS Trans Ltd | Transport & logistics | 2014 |
| CSH Carpentry Ltd | Construction | 2024 |
| CSH Construction & Building Maintenance Ltd | Construction | 2025 |
| CSL Surfacing Limited | Construction | 2025 |
| Cswood Ltd | Information & communication | 2011 |
| CT Allsopp Ltd | Manufacturing | 2023 |
| CTD Technical Services Limited | Professional & scientific | 2026 |
| Cubitt Real Time Systems Limited | Administrative & support | 2006 |
| Cudos Creative Limited | Professional & scientific | 2013 |
| Cudos Holdings Limited | Professional & scientific | 2023 |
| Culture Code Ltd | Arts & recreation | 2023 |
| Culture Woods Consulting Ltd | Professional & scientific | 2023 |
| Curated Escapes Travel Limited | Administrative & support | 2025 |
| Current Legal Recruitment Limited | Administrative & support | 2026 |
| Curry Yard Ltd | Hospitality | 2025 |
| Custom Body Repair Ltd | Wholesale & retail | 2020 |
| CWS Skip Hire Ltd | Water & waste | 2024 |
| CX Asia Ltd | Professional & scientific | 2025 |
| Cyber Galaxy Ltd | Information & communication | 2013 |
| Cyber Rebels Ltd | Information & communication | 2025 |
| Cybernetica Solutions Limited | Information & communication | 2020 |
| Cylinder Rebores Group Ltd | Professional & scientific | 2025 |
| Cync Holding Limited | Information & communication | 2025 |
| D & a Engineering Services Limited | Professional & scientific | 2020 |
| D & a Machine Tools Limited | Manufacturing | 2017 |
| D & M Electrical Ltd | Construction | 2025 |
| D & P Property Partners Ltd | Real estate | 2024 |
| D & P Retail Limited | Wholesale & retail | 2025 |
| D & S Blinds Ltd | Wholesale & retail | 2008 |
| D & S Stores Limited | Wholesale & retail | 2019 |
| D & T Barr Properties Ltd | Construction | 2016 |
| D & T Prestige Developments Limited | Construction | 2021 |
| D B Hose (Midlands) Limited | Manufacturing | 2008 |
| D C Lewis Ltd | Construction | 2022 |
| D Clarke Groundworks & Surfacing Ltd | Construction | 2016 |
| D Griffiths Electrical Services Limited | Energy | 2009 |
| D H M Groundworks Limited | Construction | 2025 |
| D Hill GAS Limited | Construction | 2003 |
| D K Lewis Limited | Wholesale & retail | 2006 |
| D K Payroll Solutions Ltd | Professional & scientific | 2012 |
| D L Cleaning Services (UK) Ltd. | Other services | 2012 |
| D L Domestic Services Limited | Administrative & support | 2021 |
| D M T Roofing Services Limited | Construction | 2020 |
| D R C Property Limited | Construction | 2009 |
| D Taylor Carpentry Limited | Manufacturing | 2026 |
| D W Fleet Services Limited | Manufacturing | 2013 |
| D&D Property Ventures Ltd | Real estate | 2024 |
| D&T Property Group Ltd | Real estate | 2026 |
| D-Costa Sharks Ltd | Wholesale & retail | 2026 |
| D. S Auto Electrics Ltd | Professional & scientific | 2020 |
| D.A.D Electrical Services Ltd | Construction | 2024 |
| D.H. Alldridge & Sons Limited | Construction | 2003 |
| D.L. Haynes Groundworks Ltd | Construction | 2004 |
| D.S. Prosystems Limited | Information & communication | 1997 |
| DA Comps Ltd | Wholesale & retail | 2021 |
| DAB Online Limited | Wholesale & retail | 2022 |
| Dabble Trading Limited | Wholesale & retail | 2022 |
| Daemon Fire & Security Limited | Construction | 1985 |
| Daft COW Ltd | Information & communication | 2025 |
| DAL Heating & Air Conditioning Ltd | Extraterritorial | 2016 |
| Dalco Construction & Land Ltd | Construction | 2026 |
| Dale House Holding Limited | Health & social care | 2019 |
| Dalton Plastering Ltd | Construction | 2009 |
| DAN Hemingway Coaching Ltd | Education | 2018 |
| Dana Car LOT Ltd | Wholesale & retail | 2025 |
| Danceology Limited | Arts & recreation | 2011 |
| Dane Waldron Logistics Limited | Transport & logistics | 2017 |
| Danebay Limited | Wholesale & retail | 1995 |
| Danery Meadow Park Ltd | Hospitality | 2025 |
| Daniel Impact Ltd | Transport & logistics | 2021 |