| Coast Technical Services Ltd | Administrative & support | 2010 |
| Coastform Systems Limited | Manufacturing | 1990 |
| Coates Solicitors Limited | Professional & scientific | 2009 |
| Coates's Motor Specialist Ltd | Wholesale & retail | 2025 |
| Cobal (Cranes) Ltd | Manufacturing | 1976 |
| Cobalt Blue Properties Limited | Real estate | 1999 |
| Cobalt Commercial Services Ltd | Professional & scientific | 2025 |
| Coban Pizza Ltd | Hospitality | 2025 |
| Cobb Electrical Ltd | Construction | 2023 |
| Cobdell Limited | Financial services | 1977 |
| Cobden View Hotel Limited | Wholesale & retail | 2005 |
| Cobden View Lessees Limited | Real estate | 2017 |
| Cobnar Management Limited | Households | 1983 |
| Cobra Digital Media Ltd | Information & communication | 2021 |
| Cobra Group Holdings Ltd | Real estate | 2018 |
| Cobra Manufacturing Ltd | Manufacturing | 2021 |
| Cobra Sport Exhausts Ltd | Extraterritorial | 2021 |
| Cobra Sport International Ltd | Administrative & support | 2016 |
| Coby's Cars Ltd | Wholesale & retail | 2023 |
| Cochise Ltd | Professional & scientific | 2020 |
| Cockayne Estates Limited | Real estate | 2015 |
| Cockayne Limited | Agriculture & fishing | 2023 |
| Cocker and Carr Ltd. | Real estate | 2014 |
| Cockerill Investments Limited | Real estate | 2026 |
| Cockney Rebel (Fashions) Limited | Wholesale & retail | 1991 |
| Coco Barber Ltd | Other services | 2024 |
| Coco Inns Ltd | Hospitality | 2026 |
| Coco Pops Music Limited | Arts & recreation | 2015 |
| Coco's Maidenbower Limited | Other services | 2006 |
| Cococo&Co Ltd | Water & waste | 2024 |
| Coconut Technologies Limited | Information & communication | 2020 |
| Cocoon Card Ltd | Information & communication | 2019 |
| COD and Caper Limited | Hospitality | 2016 |
| COD N Batter Limited | Hospitality | 2025 |
| Coda Studios (2020) Limited | Financial services | 2020 |
| Coda Studios (Holdings) Limited | Financial services | 2016 |
| Coda Studios Limited | Professional & scientific | 2003 |
| Codar Ltd | Manufacturing | 2013 |
| Codas Consulting Ltd | Professional & scientific | 2017 |
| Code Nightclub Limited | Hospitality | 2020 |
| Codeatwork Limited | Information & communication | 2010 |
| Codecraft Advisory Limited | Wholesale & retail | 2025 |
| Codecraft Online Limited | Information & communication | 2007 |
| Codeora Ltd | Wholesale & retail | 2025 |
| Codeplan Ltd | Health & social care | 2000 |
| Coders on Caffeine Ltd. | Information & communication | 2013 |
| Codetech Limited | Information & communication | 2013 |
| Codevalent Ltd | Wholesale & retail | 2021 |
| Codstop Limited | Real estate | 2025 |
| Coex Limited | Extraterritorial | 1985 |
| Coexistence Limited | Wholesale & retail | 2025 |
| Cofac LD Ltd | Professional & scientific | 2016 |
| Coffea & Sandwich Bar Limited | Hospitality | 2026 |
| Coffee & Cream Ltd | Hospitality | 2018 |
| Coffee and ALL Ltd | Hospitality | 2025 |
| Coffee BOO Limited | Wholesale & retail | 2026 |
| Coffee Rules 104 Ltd | Hospitality | 2025 |
| Coffee Time South Mall Ltd | Wholesale & retail | 2018 |
| Coffee Tunes Limited | Wholesale & retail | 2024 |
| COG Marketing Ltd | Wholesale & retail | 2003 |
| Cogensa Ltd | Professional & scientific | 2014 |
| Cogne U.K. Limited | Wholesale & retail | 1996 |
| Cognicity AI Ltd | Wholesale & retail | 2025 |
| Cognition Ltd | Administrative & support | 2019 |
| Cohaven Properties Ltd | Real estate | 2026 |
| Coherence & Resonance Limited | Health & social care | 2025 |
| Coherence Digital Limited | Information & communication | 1999 |
| Cojolo Limited | Professional & scientific | 2008 |
| COL Marsh Education Services Ltd | Education | 2023 |
| Colburn Investments Ltd | Real estate | 2018 |
| Cold Works Ltd | Professional & scientific | 2026 |
| Coldwell Lettings Limited | Real estate | 2022 |
| Coldwell Property Solutions Ltd | Construction | 2025 |
| Cole Brothers Ltd | Extraterritorial | 2021 |
| Coleclad Limited | Wholesale & retail | 2009 |
| Coleman Roofing Supplies Limited | Extraterritorial | 1969 |
| Coleshill Estates Limited | Construction | 2014 |
| Coleshill Group Limited | Construction | 2004 |
| Coleshill Land & Developments Limited | Construction | 1988 |
| Coleshill Securities Limited | Real estate | 2014 |
| Coleycoco UK Ltd | Wholesale & retail | 2019 |
| Cole’S Closet Limited | Wholesale & retail | 2024 |
| Coliv Alpha Ltd | Real estate | 2025 |
| Collaborative Accounts Limited | Professional & scientific | 2018 |
| Collaboratus Bibi Ltd | Wholesale & retail | 2021 |
| Collections Insights Limited | Professional & scientific | 2013 |
| Collective Consultancy Services Ltd | Professional & scientific | 2025 |
| COLLECTIVE10 Ltd | Information & communication | 2020 |
| Collegiate (Montessori) Limited | Education | 1980 |
| Collegiate Properties Limited | Real estate | 1993 |
| Colley Road Financial & Retail Ltd | Wholesale & retail | 2012 |
| Collie Creations Ltd | Wholesale & retail | 2021 |
| Collina Properties Limited | Real estate | 2025 |
| Collinature Ventures Ltd | Wholesale & retail | 2026 |
| Collings Family Property Limited | Real estate | 2020 |
| Collins & Sons Engineering Ltd | Construction | 2010 |
| Collins & Sons Property Holdings Limited | Financial services | 2018 |
| Collins Water Products Limited | Wholesale & retail | 2014 |
| Collinson Performance & Training Ltd | Other services | 2018 |
| Collision Care Accident Repair Centre Ltd | Wholesale & retail | 2023 |