| Coffeenation Ltd | Hospitality | 2024 |
| Cofsna LLP | | 2009 |
| Cognitive Compliance Limited | Professional & scientific | 2026 |
| Cojabepo Productions Limited | Arts & recreation | 2023 |
| Coldwell and Sons Ltd | Real estate | 2025 |
| Collectum Ltd | Wholesale & retail | 2025 |
| Collier Knight Watts LLP | | 2003 |
| Colne Holdings (2) Limited | Extraterritorial | 2025 |
| Colne Holdings Limited | Extraterritorial | 2025 |
| Colosseo EAS Ltd | Professional & scientific | 2025 |
| Colour Code Powder Coating Limited | Manufacturing | 2010 |
| Colour Refurb Manchester Limited | Construction | 2021 |
| Colourful Movements Limited | Manufacturing | 2020 |
| Combemill Limited | Real estate | 1962 |
| Combined Medical Services Limited | Health & social care | 2021 |
| Combined S D Services Ltd | Education | 2021 |
| Comedy Stitch Productions CIC | Education | 2020 |
| Comfihomes Ltd | Households | 2020 |
| Comfort Autos Ltd | Wholesale & retail | 2016 |
| Comfort for YOU Limited | Real estate | 2025 |
| Comfort Investments Ltd | Real estate | 2018 |
| Commercial Auto House Van Centre Ltd | Wholesale & retail | 2026 |
| Commercial Circle Group Limited | Professional & scientific | 2019 |
| Commercial Coatings Nationwide Ltd | Construction | 2019 |
| Commercial Investment Nominees Ltd | Extraterritorial | 2002 |
| Commercial Project Solutions Ltd | Professional & scientific | 2024 |
| Commercial Properties (Northern) Limited | Real estate | 2012 |
| Commercial Property Marketing Limited | Real estate | 2024 |
| Commercial Quantity Solutions Limited | Professional & scientific | 2023 |
| Commfy Limited | Wholesale & retail | 2025 |
| Commit NO Nuisance Limited | Arts & recreation | 1997 |
| Commonhall Properties Limited | Professional & scientific | 2007 |
| Community Doosti (Friendship) CIC | Education | 2021 |
| Community Futures Trust CIC | Professional & scientific | 2012 |
| Community Kitchen (Manchester) Ltd | Other services | 2018 |
| Community Shopping Ltd | Wholesale & retail | 2023 |
| Community Sports Vision CIC | Arts & recreation | 2022 |
| Community Upskilling CIC | Education | 2024 |
| Como America - UK Ltd | Other services | 2020 |
| Como UK Ltd | Wholesale & retail | 2016 |
| Company Setups Group Ltd | Other services | 2017 |
| Compass Education Service Ltd | Education | 2024 |
| Competition Consultancy Ltd | Professional & scientific | 2024 |
| Composecure UK, Ltd. | Professional & scientific | 2025 |
| Computer Talk Technology Limited | Information & communication | 2001 |
| Computer World (MCR) Ltd | Information & communication | 2019 |
| Comtech UK Holdings Limited | Financial services | 2020 |
| Conbord Ltd | Wholesale & retail | 2026 |
| Concept Haus Ltd | Hospitality | 2024 |
| Concept Leisure Ltd | Financial services | 2019 |
| Concerva Limited | Financial services | 2001 |
| Concierge First Ltd | Administrative & support | 2025 |
| Concord Realty Ltd | Real estate | 2022 |
| Condor Trading Ltd | Extraterritorial | 2013 |
| Conductix-Wampfler Ltd | Manufacturing | 1978 |
| Conex Cars Ltd | Administrative & support | 2016 |
| Confidence Academy Ltd | Education | 2020 |
| Cong. D'Satmar Limited | Education | 2011 |
| Congolese Diaspora Next Generation Community Interest Company | Education | 2025 |
| Connaught Properties Manchester Ltd | Extraterritorial | 2024 |
| Connect Accommodation Ltd | Real estate | 2026 |
| Connect Care Enterprise Limited | Transport & logistics | 2018 |
| Connect Careuk Ltd | Administrative & support | 2022 |
| Connect Institute Ltd | Information & communication | 2025 |
| Connect International Resources Limited | Education | 2014 |
| Connected in the Community Ltd | Education | 2025 |
| Connecticut Group Ltd | Real estate | 2026 |
| Connection Estates Ltd | Real estate | 2025 |
| Connectionuk Ltd | Wholesale & retail | 2025 |
| Connex Properties Ltd | Real estate | 2016 |
| Connex Services Limited | Information & communication | 2019 |
| Connolly Property Management Limited | Professional & scientific | 2004 |
| Connolly Scaffolding Limited | Construction | 2002 |
| Conscious Made Ltd | Professional & scientific | 2024 |
| Consort Group Ltd | Administrative & support | 2021 |
| Construction D&G Limited | Construction | 2025 |
| Consul Talent Ltd | Administrative & support | 2025 |
| Consultant for YOU Ltd | Professional & scientific | 2018 |
| Consultant Nominees Limited | Extraterritorial | 2006 |
| Consulting Psychotherapy Ltd | Information & communication | 2024 |
| Continuing Care Solutions Limited | Health & social care | 2016 |
| Contract Group Ltd | Real estate | 2021 |
| Contract Nominees Limited | Extraterritorial | 2005 |
| Contracting Services (GB) 1 Limited | Information & communication | 2001 |
| Control Dominate Submit Ltd | Manufacturing | 2026 |
| Controlshare Limited | Real estate | 1987 |
| Convalescent Retreat Limited | Health & social care | 2018 |
| Convene Cyber Ltd | Information & communication | 2024 |
| Conway Crescent Ltd | Real estate | 2019 |
| Conwy RD Challenger Limited | Extraterritorial | 2021 |
| Cook and Baker Limited | Hospitality | 2012 |
| Cookie Family Foods Ltd | Manufacturing | 2026 |
| Cooking UP Amazing Trips Ltd | Information & communication | 2024 |
| Cooks of London Ltd | Wholesale & retail | 2023 |
| Cookson Hotels LLP | | 2011 |
| Cookson Properties LLP | | 2011 |
| Cool Cloud Consulting Ltd | Professional & scientific | 2020 |
| Coolbrook Technologies Ltd. | Professional & scientific | 2023 |
| Coolmed Limited | Wholesale & retail | 2017 |
| Coolwhite Ltd | Extraterritorial | 2013 |