| Cozycrazee Limited | Wholesale & retail | 2024 |
| CP Elite Services Ltd | Professional & scientific | 2023 |
| CP Property Services Ltd | Construction | 2021 |
| CPC Civils Group Limited | Financial services | 2004 |
| CPC Civils Limited | Construction | 1997 |
| CPC District Heating Limited | Construction | 2018 |
| CPF Limited | Hospitality | 1992 |
| CPG Linings Limited | Construction | 2007 |
| Cpio Limited | Information & communication | 1990 |
| CPL Groundworks Group Limited | Construction | 2023 |
| CPL Groundworks Limited | Construction | 2013 |
| Cppt Services Limited | Financial services | 2002 |
| CPR (Midlands) Limited | Construction | 2016 |
| Cptruths Limited | Wholesale & retail | 2024 |
| CQI Holdings Limited | Financial services | 2020 |
| CQI Limited | Wholesale & retail | 1999 |
| Craddock Metal Recycling Limited | Water & waste | 2006 |
| Craig Jones Enterprises Limited | Administrative & support | 2015 |
| Cranfield Tunnelling Limited | Construction | 2006 |
| Cranford Grange (Smethwick) Management Company Limited | Households | 2017 |
| Cranmore Convenience PVT Ltd | Wholesale & retail | 2018 |
| Cranmore Garage (Solihull) Ltd | Wholesale & retail | 2013 |
| Cranmore Park Ltd | Wholesale & retail | 2002 |
| Cranmore Retail Ltd | Wholesale & retail | 2026 |
| Crawford Electrical Solutions Limited | Construction | 2023 |
| Crawford Services Group Ltd | Financial services | 2025 |
| Cray Financial Limited | Professional & scientific | 2010 |
| Craydon Ltd | Administrative & support | 2022 |
| CRB Maintenance Services Ltd | Construction | 2025 |
| CRB Property Group Ltd | Real estate | 2026 |
| CRE8 Fitness Studio Limited | Arts & recreation | 2018 |
| CRE8 Health & Wellness Ltd | Arts & recreation | 2021 |
| CRE8TIVE Productions Ltd | Arts & recreation | 2020 |
| Creamedup Ltd | Wholesale & retail | 2026 |
| Create Jobs Limited | Information & communication | 2021 |
| Createfuture Limited | Real estate | 2001 |
| Createinvest Ltd | Financial services | 2017 |
| Createinvest Portfolio Ltd | Real estate | 2017 |
| Createinvest Services Ltd | Real estate | 2018 |
| Creation Building Services Ltd | Construction | 2019 |
| Creation Financial Services Limited | Financial services | 1973 |
| Creations by Cloud Nine Ltd | Other services | 2020 |
| Creative Cloud Consulting Ltd | Information & communication | 2015 |
| Creative Dental Solutions Limited | Health & social care | 2021 |
| Creative Idea Limited | Professional & scientific | 1991 |
| Creative IT Consultants Ltd | Information & communication | 2018 |
| Creative Landscapes and Surfacing Ltd | Construction | 2020 |
| Creaton Engineering Limited | Manufacturing | 1982 |
| Creaton Holdings Limited | Financial services | 2018 |
| Creator Haus Limited | Wholesale & retail | 2025 |
| Creators Theatre Company CIC | Arts & recreation | 2021 |
| Credit AI Limited | Information & communication | 2022 |
| Credit Risk Insurance Services Ltd | Financial services | 2002 |
| Credo Electrical Ltd | Construction | 2019 |
| Crendon Group Limited | Manufacturing | 2020 |
| Crendon Timber Engineering Limited | Manufacturing | 1986 |
| Creou Limited | Information & communication | 2011 |
| Crescent Press Limited | Manufacturing | 1997 |
| Crescent Property Holdings Ltd | Real estate | 2019 |
| Crescent(H-In-A)Management Limited(The) | Households | 1967 |
| Cressingham Properties Limited | Real estate | 1950 |
| Cresswick Dulwich Limited | Real estate | 2022 |
| Cresswick Limited | Real estate | 2016 |
| Cresswick Mottingham Limited | Real estate | 2023 |
| Crest Couriers Ltd | Transport & logistics | 2017 |
| Crest Law Group Limited | Professional & scientific | 2025 |
| Crestbay Solutions Limited | Information & communication | 2004 |
| Crestbuild Limited | Other services | 2017 |
| Crestview Dental Ltd | Health & social care | 2025 |
| CRF Driveways Ltd | Construction | 2026 |
| Cricketers Green Management Company Limited | Real estate | 2016 |
| Criss Cross Castles Ltd | Arts & recreation | 2022 |
| Cristiean Limited | Information & communication | 2024 |
| Crockart Commercial Consulting Limited | Professional & scientific | 2026 |
| Croftgreen Limited | Other services | 1997 |
| Crompton Holdings Limited | Professional & scientific | 2000 |
| Crompton Technology Group Limited | Manufacturing | 1969 |
| Cronus Solutions Limited | Information & communication | 2007 |
| Cross & Craig Associates Limited | Professional & scientific | 1998 |
| Cross Electrics & Security Ltd | Construction | 2019 |
| Cross Roads Service Station Limited | Wholesale & retail | 1969 |
| Crossed Over | Other services | 2008 |
| Crossley Court (Coventry) Limited | Households | 1963 |
| Crowden Drive Limited | Households | 2014 |
| Crown & Bezel Watches Limited | Wholesale & retail | 2025 |
| Crown Architectural Aluminium (UK) Limited | Extraterritorial | 2008 |
| Crown Cars Solihull Ltd | Transport & logistics | 2010 |
| Crown Freehold Limited | Households | 2016 |
| Crowned Beauty Limited | Other services | 2026 |
| Crownpower Limited | Wholesale & retail | 2000 |
| Croy Education Services Ltd | Education | 2020 |
| CRR Partners Ltd | Information & communication | 2021 |
| Crystabyte Ltd | Information & communication | 2021 |
| Crystal Horizon Group Ltd | Administrative & support | 2026 |
| Crystal Property Holdings Limited | Extraterritorial | 2015 |
| Crystal River Limited | Wholesale & retail | 1997 |
| Crystal Smile Professional Limited | Health & social care | 2025 |
| CS00 Ltd | Arts & recreation | 2014 |
| CSC Associates Ltd | Real estate | 2023 |
| CSF Developments Ltd | Real estate | 2026 |