| Coach Collins Ltd | Health & social care | 2024 |
| Coach Events Services Ltd | Transport & logistics | 2015 |
| Coach PUB Company Ltd | Hospitality | 2022 |
| Coach RUI Ltd | Other services | 2025 |
| Coaches Vault Football Limited | Arts & recreation | 2025 |
| Coaches Vault Limited | Education | 2025 |
| Coaching and Training Centre Limited | Administrative & support | 2013 |
| Coaching LAB Limited | Arts & recreation | 2021 |
| Coachworld Ltd | Information & communication | 2026 |
| Coaknaldo Ltd | Real estate | 2025 |
| Coalescent Limited | Information & communication | 2020 |
| Coast and Bounty Ltd | Wholesale & retail | 2024 |
| Coast and Country Fencing Ltd | Construction | 2024 |
| Coast Architecture Limited | Professional & scientific | 2016 |
| Coast Furnishings Ltd | Other services | 2014 |
| Coast Massages Limited | Other services | 2024 |
| Coastal Accountants Limited | Professional & scientific | 2010 |
| Coastal Cars Southampton Limited | Transport & logistics | 2022 |
| Coastal Cooling Limited | Professional & scientific | 2018 |
| Coastal Curios Ltd | Wholesale & retail | 2024 |
| Coastal Private GP and Aesthetics Ltd | Health & social care | 2022 |
| Coastal Property Warsash Ltd | Real estate | 2025 |
| Coastal Security Installations Ltd | Administrative & support | 2014 |
| Coasters to Coasters Care Limited | Health & social care | 2021 |
| Coastline Access Ltd | Administrative & support | 2021 |
| Coastline Care Group Limited | Administrative & support | 2023 |
| Coastline Carpentry & Joinery Ltd | Construction | 2017 |
| Coastline Facilities Support Services Limited | Construction | 2018 |
| Coates Golf Ltd | Wholesale & retail | 2025 |
| Coates Innovations Ltd | Administrative & support | 2011 |
| Cobbett Court Residents Association (NO 2) Limited | Households | 2000 |
| Cobden Court Management Limited | Professional & scientific | 1982 |
| Cobeat Limited | Arts & recreation | 2023 |
| Cobra Training Limited | Education | 2012 |
| Cockeram Interiors Limited | Manufacturing | 2023 |
| Cocky Anchor (Worcester) Limited | Hospitality | 2023 |
| Cocky Anchor Limited | Hospitality | 2018 |
| Cocky Anchor RRC Limited | Hospitality | 2022 |
| Cocky PUB Co Limited | Hospitality | 2018 |
| Coco & Bella Creative Design Ltd | Information & communication | 2025 |
| Coco Beauty Co (South) Ltd | Other services | 2024 |
| Coco Cocktail Lounge Ltd | Hospitality | 2024 |
| Coco Marine Ltd | Professional & scientific | 2024 |
| Coco Trans Ltd | Transport & logistics | 2025 |
| Coconut Bookkeeping Ltd | Professional & scientific | 2020 |
| Cocoo Holdings Ltd | Wholesale & retail | 2020 |
| COD Almighty Ltd | Hospitality | 2025 |
| Code 9 Management Limited | Financial services | 2016 |
| Code Claws Ltd | Information & communication | 2026 |
| Code Delta Limited | Professional & scientific | 2011 |
| Code Zero Consultancy Ltd | Information & communication | 2025 |
| Code Zero Limited | Manufacturing | 2004 |
| Codearson Ltd | Information & communication | 2025 |
| CODED41 Ltd | Wholesale & retail | 2019 |
| Codename Rcrds Limited | Information & communication | 2022 |
| Codintrans Limited | Transport & logistics | 2016 |
| Coeden Helyg Investments Limited | Real estate | 2017 |
| Coeden Helyg Limited | Real estate | 2017 |
| Coeden Helyg Projects Limited | Real estate | 2021 |
| Coefficient Digital Services Ltd | Information & communication | 2022 |
| Coevis World Ltd | Real estate | 2024 |
| Coffee Creatures Ltd | Manufacturing | 2018 |
| Coffee Mate Ltd | Hospitality | 2025 |
| Coffeecream House UK Limited | Hospitality | 2025 |
| Coffeelogy Limited | Hospitality | 2023 |
| COG Financial Ltd | Financial services | 2023 |
| COG Lettings Limited | Real estate | 2024 |
| Coggins Ultimate Well Being Limited | Other services | 2014 |
| Cognitiva Consultancy Ltd | Professional & scientific | 2021 |
| Cognizant Consultancy Ltd | Other services | 2012 |
| Cogs Group Ltd | Information & communication | 2025 |
| Cogswell Leisure Limited | Hospitality | 2017 |
| Cohab Investments Ltd | Real estate | 2024 |
| Cohesion Marketing UK Ltd | Extraterritorial | 2025 |
| Coilmaster Limited | Professional & scientific | 1994 |
| Coin Drop Theatre Ltd | Arts & recreation | 2023 |
| Cokeham Ltd | Wholesale & retail | 2000 |
| Col's Campers Ltd. | Extraterritorial | 2024 |
| Colborn Risk Management Limited | Professional & scientific | 2016 |
| Cold Coffee Ltd | Wholesale & retail | 2013 |
| Cold Coffee Retail Ltd | Manufacturing | 2018 |
| Cold CUT Systems Limited | Public administration | 2019 |
| Cold Water Cruising Limited | Transport & logistics | 2021 |
| Cole Carpentry and Construction Ltd | Administrative & support | 2018 |
| Colebrook Holdings Limited | Real estate | 1947 |
| Colehill Pharmacy Limited | Administrative & support | 1992 |
| Colehill Property Ltd | Real estate | 2025 |
| Coleman Cross Associates Limited | Administrative & support | 2008 |
| Coleman Trading Limited | Wholesale & retail | 2004 |
| Colemans 78 Ltd | Real estate | 2023 |
| Coleridge Management Company Limited | Households | 1987 |
| Coles Design & Construction Ltd | Construction | 2025 |
| Coles Plumbing and Heating Ltd | Construction | 2025 |
| Colibri Dorado Ltd | Information & communication | 2024 |
| Colin Francis Warburg | Extraterritorial | 2024 |
| Colin Read Associates Limited | Professional & scientific | 2025 |
| Colin Steel Engineering Services Ltd | Professional & scientific | 2025 |
| Colin Wylde Ltd | Construction | 2008 |
| Colinette Yarns Limited | Manufacturing | 1988 |
| Collaborative Environmental Advisers (CEA) Limited | Professional & scientific | 2017 |