| CP Transportation Services Limited | Transport & logistics | 2005 |
| CP West COM Limited | Construction | 2022 |
| CPB Lift Services Limited | Construction | 2025 |
| CPB Properties Ltd | Real estate | 2019 |
| CPB Third Sector Consulting Limited | Professional & scientific | 2025 |
| Cpce Limited | Administrative & support | 2020 |
| CPE 2007 Ltd | Construction | 2007 |
| Cpie Limited | Administrative & support | 2014 |
| CPL International UK Limited | Transport & logistics | 2024 |
| CPW Locksmiths Limited | Administrative & support | 2026 |
| Cpyett Limited | Professional & scientific | 2025 |
| Cquaresma Ltd | Wholesale & retail | 2023 |
| Crabtree and Crabtree Wellbeing Limited | Health & social care | 2019 |
| Cracco EN Limited | Hospitality | 2012 |
| Crackin Games Ltd | Manufacturing | 2025 |
| Crackles Sport Limited | Arts & recreation | 2024 |
| Cracknell Properties Limited | Real estate | 2004 |
| Cracknell Risk Consulting Limited | Financial services | 2022 |
| Crafted Conservation Ltd | Wholesale & retail | 2024 |
| Crafted Crystals Ltd | Wholesale & retail | 2024 |
| Crafted Cultures International Limited | Manufacturing | 2019 |
| Crafted Media Ltd | Information & communication | 2008 |
| Craftflair Limited | Wholesale & retail | 2024 |
| Craftsphere Limited | Wholesale & retail | 2024 |
| Craig Family Holdings Limited | Real estate | 2016 |
| Craig Risby Carpentry Limited | Manufacturing | 2018 |
| Crane Limited | Manufacturing | 1908 |
| Crane Pension Trustee Company (UK) Limited | Financial services | 2010 |
| Crane SC Holdings Limited | Professional & scientific | 2010 |
| Cranmer Cliff Gardens Management Company Limited | Households | 2005 |
| Crarae Ltd | Financial services | 2023 |
| Crascall Studio Limited | Professional & scientific | 2006 |
| Crave Ltd | Other services | 2022 |
| Craven Crafts & Candles Ltd | Wholesale & retail | 2024 |
| Crawford Estates (Suffolk) Limited | Extraterritorial | 2022 |
| Crawley Mortgage Solutions Ltd | Other services | 2018 |
| Crazy Turk Ltd | Wholesale & retail | 2019 |
| Crda Consultancy Limited | Transport & logistics | 2020 |
| CRE8 Theatre Productions CIC | Arts & recreation | 2022 |
| Creador UK Ltd | Information & communication | 2018 |
| Crease & Fold Technology (UK) Limited | Manufacturing | 2003 |
| Create Hair Limited | Other services | 2019 |
| Create Pathways CIC | Education | 2026 |
| Creating Impact Limited | Professional & scientific | 2020 |
| Creation Insight Limited | Professional & scientific | 2018 |
| Creative Building Designs Ltd | Professional & scientific | 2018 |
| Creative Building Services (Suffolk) Ltd | Construction | 2022 |
| Creative Business Coaching Ltd | Professional & scientific | 2024 |
| Creative Capital Consultancy Ltd | Professional & scientific | 2021 |
| Creative Computing Club Community Interest Company | Education | 2014 |
| Creative Cure Ltd | Professional & scientific | 2020 |
| Creative Diversity Living Ltd | Health & social care | 2023 |
| Creative Home-Works Ltd | Construction | 2012 |
| Creative Paving (East Anglia) Limited | Administrative & support | 2014 |
| Creative Resource and Projects Ltd | Wholesale & retail | 2019 |
| Creative Volcano Limited | Professional & scientific | 2013 |
| Creator Quest Ltd | Education | 2022 |
| Creatorlink Group Ltd | Professional & scientific | 2026 |
| Credco Limited | Construction | 2003 |
| Credo Living Limited | Construction | 2021 |
| Creed Property Investments Ltd | Administrative & support | 2025 |
| Creed SSH Management Ltd | Administrative & support | 2025 |
| Creeting 123 Limited | Extraterritorial | 1965 |
| Creightive Ltd | Administrative & support | 2017 |
| Crescent Developments UK Limited | Real estate | 2007 |
| Creskeld Ventures Limited | Other services | 2021 |
| Cressec Ltd | Information & communication | 2025 |
| Cresswell Capital Leasehold Limited | Real estate | 2023 |
| Cresswell Capital Ltd | Real estate | 2021 |
| Crestview Consulting Limited | Administrative & support | 2025 |
| Crew Property Group Limited | Financial services | 2021 |
| Crew Property Investments Limited | Real estate | 2019 |
| Crew Rental Limited | Administrative & support | 2025 |
| Crewmare Ltd | Transport & logistics | 2024 |
| Crichton Property Consultants Limited | Professional & scientific | 2017 |
| Crichton Property Limited | Professional & scientific | 2014 |
| Cridor Trans Ltd | Transport & logistics | 2023 |
| Crimp N FIX Limited | Financial services | 2021 |
| Crimp N FIX Properties Ltd | Real estate | 2023 |
| Cris Consultancy Group Limited | Professional & scientific | 2017 |
| Crisis Response for Youth Ltd | Health & social care | 2026 |
| Crisp Engineering Limited | Manufacturing | 2004 |
| Crisps Paramount Garage Limited | Wholesale & retail | 2004 |
| Cristi TUR Ltd | Transport & logistics | 2019 |
| Cristian M Ltd | Transport & logistics | 2018 |
| CRISTIAN1991 Ltd | Transport & logistics | 2025 |
| Critical Sector Resourcing CIC | Administrative & support | 2019 |
| CRJ Property Services Limited | Real estate | 2017 |
| Croatia Online Ltd | Information & communication | 2006 |
| Crobit Ltd | Information & communication | 2017 |
| Croft Medical Ltd | Health & social care | 2019 |
| Crofters Contracting Ltd | Professional & scientific | 2023 |
| Crofthill Properties Ltd | Real estate | 2023 |
| Cromer Studios Ltd | Real estate | 2019 |
| Crompton Security South Limited | Administrative & support | 2024 |
| Crosby Landscape Horticulture Ltd | Agriculture & fishing | 2010 |
| Cross Border Claims Limited | Information & communication | 2002 |
| Cross Country Growth Partners Limited | Other services | 2025 |
| Cross Culture Safeguarding Limited | Other services | 2025 |
| Crossfire Consultancy Limited | Professional & scientific | 2017 |