| CPA Communications Limited | Information & communication | 2025 |
| CPC Energy Ltd | Professional & scientific | 2024 |
| CPC IB Limited | Financial services | 2026 |
| CPC Investments Ltd | Real estate | 2025 |
| CPH Management Consultants Limited | Professional & scientific | 2021 |
| Cpit Consulting Limited | Information & communication | 2024 |
| CPM Entertainment Ltd | Arts & recreation | 2025 |
| CPO Investments Limited | Financial services | 2025 |
| Cpower 247 Ltd | Professional & scientific | 2011 |
| Cpower Energy Limited | Administrative & support | 2015 |
| Cppvasi Ltd | Transport & logistics | 2023 |
| CPS Electricals Ltd | Transport & logistics | 2003 |
| CPT Trading Limited | Information & communication | 2025 |
| Cptek Ltd | Extraterritorial | 2023 |
| Crab Town Beverage Limited | Hospitality | 2025 |
| Crab Town Functions Limited | Hospitality | 2025 |
| Crab Town Properties Limited | Real estate | 2025 |
| Crab Town Rooms Limited | Hospitality | 2025 |
| Craft Holdings Limited | Financial services | 2023 |
| Crafted Builds Ltd | Construction | 2022 |
| Craftways Limited | Manufacturing | 2003 |
| Craig Fowlie and Associates Ltd | Other services | 2019 |
| Craig Whitnall Ltd | Administrative & support | 2012 |
| Craiglegalconsulting Ltd | Professional & scientific | 2026 |
| Craigs Plumbing & Heating Limited | Professional & scientific | 2022 |
| Craiston Consultants Ltd | Professional & scientific | 2009 |
| Cram Duplication Ltd | Manufacturing | 2021 |
| Cram Investments Limited | Real estate | 2025 |
| Cranberry Systems Limited | Other services | 2016 |
| Cranesbill Close Limited | Real estate | 2024 |
| Cranfield Philips Ltd | Professional & scientific | 2017 |
| Cranmer & Holdstock Contracts Ltd | Construction | 2005 |
| Cranmer Installations Ltd | Construction | 2015 |
| Crate Ideas Limited | Real estate | 2019 |
| Crawford Drake Wealth Management Limited | Professional & scientific | 2007 |
| Crawford Mental Health Consultancy Limited | Health & social care | 2022 |
| Crawshay Property Ltd | Real estate | 2016 |
| CRE 8 Tive Construction Ltd | Construction | 2008 |
| Creasey Drainage Ltd | Construction | 2024 |
| Create Accounts Limited | Professional & scientific | 2018 |
| Create-Aspire Ltd | Professional & scientific | 2024 |
| CREATE2CONVERT Ltd | Professional & scientific | 2022 |
| Createfut Cards Ltd | Manufacturing | 2025 |
| Creationsoft Limited | Information & communication | 2024 |
| Creativa Ltd | Construction | 2024 |
| Creative 3D Solutions Ltd | Manufacturing | 2024 |
| Creative Brick Cutters Limited | Construction | 2015 |
| Creative by Design Ltd | Extraterritorial | 2025 |
| Creative Care (East Midlands) Holdings Limited | Financial services | 2012 |
| Creative Care (East Midlands) Limited | Health & social care | 2005 |
| Creative Care Options Limited | Health & social care | 2014 |
| Creative Contracts Colchester Limited | Construction | 2020 |
| Creative FRY Ltd | Professional & scientific | 2025 |
| Creative Imperative Limited | Education | 2012 |
| Creative Reyes Properties and Investments Limited | Real estate | 2021 |
| Creative Sparks Workshop Ltd | Education | 2023 |
| Creativepower Ltd | Information & communication | 2015 |
| Credas Services Ltd | Professional & scientific | 2016 |
| Credit Vibe Finance Limited | Financial services | 2016 |
| Creditonline UK Ltd | Information & communication | 2020 |
| Creed Automotive Ltd | Wholesale & retail | 2025 |
| Creighton Media Ltd | Information & communication | 2025 |
| Cremaaa Ltd | Hospitality | 2018 |
| Cremaaa Properties Ltd | Real estate | 2025 |
| Creole Ltd | Professional & scientific | 2016 |
| Crescendo FX Limited | Arts & recreation | 2013 |
| Crescent Moon Wine Bar Ltd | Hospitality | 2024 |
| Crescent View (13-24) Limited | Real estate | 2003 |
| Crescent View (High Road) Management Limited | Households | 2000 |
| Cresford Group Limited | Financial services | 2019 |
| Crest Apparel Limited | Wholesale & retail | 2026 |
| Crest Carpentry Limited | Construction | 2022 |
| Crest Computer Services Limited | Information & communication | 2003 |
| Crest Designs Bocking Ltd | Administrative & support | 2017 |
| Crestgrant Limited | Real estate | 1985 |
| Crestie Shack Ltd | Wholesale & retail | 2025 |
| Crestmoor Limited | Other services | 2024 |
| Crewseas Management Limited | Administrative & support | 2018 |
| CRH Electrical Limited | Construction | 2010 |
| Crihana DAN Transport Ltd | Transport & logistics | 2022 |
| Crills Limited | Real estate | 2022 |
| Crime Concern UK Limited | Administrative & support | 2007 |
| Cringlobal Ltd | Information & communication | 2024 |
| Crisol Lifesciences Limited | Professional & scientific | 2025 |
| Crisp Digital Limited | Wholesale & retail | 2002 |
| Crisp Installations Limited | Construction | 2025 |
| Cristal Financial Advice Limited | Financial services | 2021 |
| Croft Systems Limited | Administrative & support | 2008 |
| Croitoru Ltd | Other services | 2019 |
| Croker Cleaning Services Ltd | Administrative & support | 2026 |
| Croome Beverage Ltd | Hospitality | 2025 |
| Croome Functions Ltd | Hospitality | 2025 |
| Croome Properties Ltd | Real estate | 2025 |
| Croome Rooms Ltd | Hospitality | 2025 |
| Crop Development Services Limited | Agriculture & fishing | 2012 |
| Croquet Gardens RS Ltd | Real estate | 2018 |
| Crosby & Barnard Properties Ltd | Construction | 2026 |
| Crosbys Building Contractors Ltd | Construction | 2016 |
| Cross Border Solutions Limited | Financial services | 2016 |
| Cross Country Carriers Limited | Administrative & support | 1995 |