| Compass Power Solutions Ltd | Energy | 2026 |
| Compassionate Ears Limited | Health & social care | 2018 |
| COMPDOORS2U Ltd | Construction | 2024 |
| Compel Claimops Ltd | Professional & scientific | 2024 |
| Compensation Advice Ltd | Financial services | 2013 |
| Competere Business Consulting Limited | Other services | 2025 |
| Competition LUX UK Ltd | Wholesale & retail | 2020 |
| Complete Claims Management Solutions Ltd | Administrative & support | 2017 |
| Complete Clean Cleaning Services Ltd | Administrative & support | 2024 |
| Complete Coffee & Bakery Limited | Manufacturing | 2023 |
| Complete Commissioning Services Limited | Construction | 2012 |
| Complete Counsel Limited | Professional & scientific | 2015 |
| Complete Dental Solutions UK Ltd | Manufacturing | 2016 |
| Complete Drywall Solutions Limited | Construction | 2025 |
| Complete Facade Systems Limited | Construction | 2018 |
| Complete Flooring Services (NW) Ltd | Construction | 2021 |
| Complete Glazing Solutions Limited | Administrative & support | 2024 |
| Complete Heating Solutions Limited | Other services | 2006 |
| Complete Home Energy Solutions Ltd | Construction | 2011 |
| Complete Home Surveys Ltd | Professional & scientific | 2020 |
| Complete Interior Drylining Ltd | Construction | 2022 |
| Complete Project Consultants Limited | Professional & scientific | 2022 |
| Complete Properties Liverpool Ltd | Real estate | 2021 |
| Complete Property Care Liverpool Ltd. | Construction | 2015 |
| Complete Property Construction Ltd | Construction | 2024 |
| Complete Removals Ltd | Transport & logistics | 2023 |
| Complete Services (Jbnw) Limited | Administrative & support | 2016 |
| Complete Software Services Limited | Information & communication | 2025 |
| Complete Solution Project Management Ltd | Other services | 2018 |
| Complete Tech Solutions (NW) Limited | Information & communication | 2014 |
| Complete Total Safety Limited | Administrative & support | 2002 |
| Complete Ventilation Solutions Ltd | Manufacturing | 2011 |
| Complete Vision UK Ltd | Construction | 2022 |
| Complex Care Choices Limited | Administrative & support | 2023 |
| Complex Innovations Limited | Professional & scientific | 2026 |
| Complex Law Ltd | Professional & scientific | 2009 |
| Complex Reports Limited | Professional & scientific | 2026 |
| Complex Risk Ltd | Professional & scientific | 2026 |
| Complheat Heating & Plumbing Ltd | Construction | 2010 |
| Compliance and Legal Ltd | Administrative & support | 2018 |
| Compliance and Validation Ltd | Administrative & support | 2004 |
| Compliance at Work Limited | Professional & scientific | 2018 |
| Compliance Care Home Solutions Ltd | Administrative & support | 2023 |
| Compliance Chain Limited | Information & communication | 2023 |
| Compliance Education Limited | Professional & scientific | 2015 |
| Compliance Health and Safety Limited | Administrative & support | 2013 |
| Compliance in Construction Limited | Other services | 2016 |
| Compliance Training Solutions Limited | Other services | 2018 |
| Compliant Health and Safety Limited | Administrative & support | 2016 |
| Compliant Management Limited | Professional & scientific | 2008 |
| Compliant Water Solutions Ltd | Water & waste | 2019 |
| Complytag Ltd | Information & communication | 2018 |
| Compos Mentis Medical Ltd | Health & social care | 2023 |
| Compost Works (UK) Ltd | Water & waste | 2019 |
| Compound Best Ltd | Financial services | 2024 |
| Compounding Property Services Limited | Real estate | 2021 |
| Comptute Limited | Professional & scientific | 2002 |
| Compunity Ltd | Arts & recreation | 2025 |
| Computas Limited | Real estate | 2006 |
| Compute Subsea Ltd | Professional & scientific | 2026 |
| Comurph Construction Ltd | Construction | 2025 |
| Comy Ltd | Transport & logistics | 2026 |
| CON ED Limited | Information & communication | 1999 |
| Con-E-Print Ltd | Administrative & support | 2019 |
| Conaty & Co Electrical Services Ltd | Construction | 2024 |
| Conaty Residential Ltd | Real estate | 2023 |
| Concentrates Warehouse Limited | Manufacturing | 2017 |
| Conceo Limited | Professional & scientific | 2023 |
| Concept Compartmentation Services Ltd | Construction | 2017 |
| Concept Digital Security. Ltd | Administrative & support | 2005 |
| Concept Facility Maintenance Limited | Construction | 2013 |
| Concept Plumbing & GAS Ltd | Construction | 2021 |
| Concept World Wide Ltd | Professional & scientific | 2020 |
| Concept-R Liverpool Ltd | Wholesale & retail | 2023 |
| Concert PUB Co Ltd | Hospitality | 2024 |
| Concert Stuff UK Limited | Arts & recreation | 2026 |
| Concierge 1892 Ltd | Administrative & support | 2023 |
| Concierge Co Global Limited | Wholesale & retail | 2025 |
| Concierge Global Services Ltd | Administrative & support | 2026 |
| Concierge NW Limited | Administrative & support | 2020 |
| Concierge Systems Limited | Information & communication | 2023 |
| Concious Caring Needs Ltd | Health & social care | 2023 |
| Concluir Retail Ltd | Construction | 2025 |
| Concrete Harvest Limited | Wholesale & retail | 2025 |
| Concrete Infinity Properties Ltd | Real estate | 2025 |
| Concrete Liverpool Limited | Extraterritorial | 2016 |
| Concrex Construction Ltd | Construction | 2025 |
| Condar Developments Ltd | Real estate | 2002 |
| Condate Construction Limited | Construction | 2020 |
| Condate Limited | Construction | 2020 |
| Condate Northwich Ltd | Construction | 2022 |
| Condemine Pharma Services Ltd | Health & social care | 2026 |
| Condition Surveys Limited | Construction | 2018 |
| Conditioning Just Ltd | Administrative & support | 2019 |
| Condor Discovery Limited | Information & communication | 2023 |
| Conduit Sound Ltd | Arts & recreation | 2024 |
| Condy & Lofthouse Limited | Professional & scientific | 1997 |
| Condy Group Holdings Limited | Professional & scientific | 2020 |
| Confederation of Co-Operative Housing Ltd | Other services | 1996 |
| Confer Associates Limited | Professional & scientific | 2003 |