| CC Zealey Ltd | Real estate | 2020 |
| Cccf Restaurants Limited | Extraterritorial | 2017 |
| CCL Tool and Plant Hire Limited | Administrative & support | 2021 |
| CCS Furniture Ltd | Wholesale & retail | 2024 |
| CCS Home Improvements Ltd | Construction | 2025 |
| CD Consulting Solutions Limited | Professional & scientific | 2024 |
| CD1 Transport Ltd | Other services | 2017 |
| CDM Property Improvements Ltd | Construction | 2014 |
| CDP Global Limited | Administrative & support | 2011 |
| Cdscds Limited | Professional & scientific | 2010 |
| Cdstay Ltd | Hospitality | 2025 |
| CDT Developments Ltd | Real estate | 2023 |
| Cduk Catering Limited | Hospitality | 2016 |
| Cebox Ltd | Transport & logistics | 2019 |
| CEC Property Group Ltd | Real estate | 2019 |
| Cedar Audit Limited | Professional & scientific | 2003 |
| Cedar Business Support Services Ltd | Administrative & support | 2018 |
| Cedar Coaching Limited | Extraterritorial | 2011 |
| Cedar Creative Ltd | Professional & scientific | 2010 |
| Cedar Homes (Midlands) Limited | Construction | 2020 |
| Cedar Oaks Consulting Limited | Professional & scientific | 2026 |
| Cedar Property Management (Midlands) Ltd | Professional & scientific | 2010 |
| Cedar R + D Ltd | Professional & scientific | 2013 |
| Cedar Sport Ltd | Professional & scientific | 2010 |
| Cedar Tree Care Home Ltd | Health & social care | 2007 |
| Cedarscape Limited | Manufacturing | 2010 |
| Ceedaris Ltd | Administrative & support | 2022 |
| Cegax Ltd | Professional & scientific | 2018 |
| Ceilings and Floors Ltd | Real estate | 2021 |
| Cejku Property Ltd | Real estate | 2023 |
| Celanese Canada Holdings Limited | Financial services | 2020 |
| Celanese Emulsions Limited | Professional & scientific | 1939 |
| Celanese Emulsions Pension Plan Trustees Limited | Financial services | 2004 |
| Celanese Holdings UK 4 LP | | 2020 |
| Celanese Mercury Holdings UK Limited | Professional & scientific | 2021 |
| Celanese Polymer Products UK Limited | Wholesale & retail | 2022 |
| Celanese Production UK Limited | Manufacturing | 2006 |
| Celanese Sales UK Limited | Wholesale & retail | 1997 |
| Celanese Services UK Limited | Administrative & support | 1997 |
| Celebrant Services Ltd | Other services | 2024 |
| Celebration Properties Limited | Real estate | 2000 |
| Celeste (Eco) Ltd | Agriculture & fishing | 2021 |
| Celestia Stones Limited | Wholesale & retail | 2025 |
| Celestial Homez Limited | Real estate | 2023 |
| Celex Casting Ltd | Administrative & support | 2003 |
| Cellfix'D Ltd | Other services | 2020 |
| Cello Recycling Ltd | Water & waste | 2013 |
| Celtic Assets Limited | Real estate | 2024 |
| Celtic Autoparts Ltd | Wholesale & retail | 2008 |
| CEM84 Limited | Wholesale & retail | 2024 |
| CEMN4 Ltd | Real estate | 2025 |
| Cenata Limited | Information & communication | 2017 |
| Cencomit Limited | Information & communication | 2023 |
| Cenomax Investments Ltd | Real estate | 2023 |
| Centari Education Limited | Information & communication | 2025 |
| Centari Holdings Limited | Financial services | 2025 |
| Centaur Success Unip Ltd | Construction | 2023 |
| Centaurus Collection Ltd | Financial services | 2022 |
| Centerpoint Estates Limited | Real estate | 2023 |
| Centra Ltd | Professional & scientific | 2020 |
| Central Education and Training | Education | 1995 |
| Central Felt Roofing Services Limited | Construction | 2011 |
| Central Fencing Limited | Construction | 2020 |
| Central Helicopters Limited | Transport & logistics | 2005 |
| Central Hide & Skin Company Limited | Manufacturing | 1995 |
| Central Inspection UK Ltd | Professional & scientific | 2023 |
| Central Management Solutions Ltd | Other services | 2023 |
| Central Motor Group Ltd | Wholesale & retail | 2025 |
| Central Motor Sport Ltd | Manufacturing | 2018 |
| Central Studios Ltd | Arts & recreation | 2014 |
| Central Tiling Midlands Ltd | Construction | 2023 |
| Central TPS LLP | | 2010 |
| Central Turbos Limited | Wholesale & retail | 2002 |
| Central Vanz & Trux Ltd | Wholesale & retail | 2007 |
| Central Wills Limited | Professional & scientific | 2024 |
| Centro Place Investments Limited | Administrative & support | 2004 |
| Centro Place Management Limited | Real estate | 2007 |
| Centro West Management Company Limited | Households | 2007 |
| Centurion Place (Kibworth) Management Company Limited | Households | 2018 |
| Centurion Way Management Company (NO.1) Limited | Real estate | 2004 |
| Century Racing Club Limited | Arts & recreation | 2024 |
| Cera Elevate Limited | Health & social care | 2002 |
| Cerestrial LLP | | 2023 |
| Ceri Hand Limited | Arts & recreation | 2021 |
| Cert-Ain Certification Limited | Education | 2014 |
| Certified Retail Group Ltd | Wholesale & retail | 2016 |
| Certified Solutions Group Ltd | Administrative & support | 2021 |
| Cerv Ltd | Professional & scientific | 2017 |
| Cetec Europe Limited | Manufacturing | 2010 |
| Cetus Group Limited | Professional & scientific | 2021 |
| Ceylon Care Ltd | Administrative & support | 2024 |
| Ceylon Cleaners Limited | Administrative & support | 2025 |
| Ceylon Constructions Ltd | Construction | 2025 |
| Cezar Transport Ltd | Transport & logistics | 2014 |
| CF Consulting Ltd | Professional & scientific | 2021 |
| Cfprogram Limited | Wholesale & retail | 2021 |
| CG Innovation Ltd | Wholesale & retail | 2021 |
| CGD Stays 46 Ltd | Hospitality | 2026 |
| Cgdg Consultancy Limited | Administrative & support | 2023 |
| CGH NON Destructive Testing Services Ltd | Professional & scientific | 2026 |