| Coach House Investment Managers Limited | Financial services | 2013 |
| Coach House Investments (NO.2) LLP | | 2015 |
| Coach House Investments (NO.3) LLP | | 2017 |
| Coach House Lending (NO. 3) Limited Partnership | | 2014 |
| Coach House Lending (NO.2) Limited Partnership | | 2014 |
| Coach House Lending (NO.4) Limited Partnership | | 2015 |
| Coach House Lending Limited Partnership | | 2013 |
| Coach House Litigation (NO 3) GP Limited | Financial services | 2017 |
| Coach House Litigation (NO 3) LP | | 2016 |
| Coach House Litigation GP Limited | Financial services | 2017 |
| Coach House Services Limited | Financial services | 2017 |
| Coach House Settlement (NO 2) Limited Partnership | | 2017 |
| Coach House Settlement (NO 3) GP Limited | Financial services | 2017 |
| Coach House Settlement (NO 3) Limited Partnership | | 2017 |
| Coach House Settlement (NO 4) GP Limited | Financial services | 2020 |
| Coach House Settlement (NO 4) Limited Partnership | | 2020 |
| Coach House Settlement (NO 5) GP Limited | Financial services | 2020 |
| Coach House Settlement (NO 5) Limited Partnership | | 2020 |
| Coach House Settlement LP | | 2017 |
| Coach House SETTLEMENT(NO6) Limited Partnership | | 2021 |
| Cobalt and Stone Ltd | Professional & scientific | 2022 |
| Cobham Farms LLP | | 2010 |
| Cocobanana Lifestyle Ltd | Wholesale & retail | 2018 |
| Cocohuts UK Limited | Construction | 2021 |
| Code Deity Ltd | Wholesale & retail | 2022 |
| Coffee Bar SO16 Limited | Other services | 2020 |
| Coffee LAB Academy Limited | Hospitality | 2013 |
| Coffee LAB the Square Limited | Hospitality | 2017 |
| Cokochik | Professional & scientific | 2016 |
| Cold Harbour Events Limited | Hospitality | 2014 |
| Coldpress GB Limited | Manufacturing | 2025 |
| Coldpress Group Limited | Energy | 2014 |
| Coleman Scaffolding Ltd | Construction | 2026 |
| Colin Channer Agricultural Contractor Limited | Agriculture & fishing | 2012 |
| Colin Morris & Associates Ltd | Information & communication | 2015 |
| Collective Shift Consulting Limited | Professional & scientific | 2021 |
| Collingbourne Wealth Management Ltd | Financial services | 2005 |
| Collins and Jarvis Limited | Real estate | 2012 |
| Colts Bay Residents Limited | Households | 1994 |
| Comcap 1 Limited | Financial services | 2015 |
| Comcap 2 Limited | Financial services | 2015 |
| Comcap 3 Limited | Financial services | 2015 |
| Comcap Haywards Heath Ltd | Real estate | 2018 |
| Commerce Supply and Servicing Limited | Professional & scientific | 2004 |
| Commercial & Specialist Cleaning Ltd | Administrative & support | 2023 |
| Commercial Maths Consulting Ltd | Information & communication | 2021 |
| Common Rider Ltd | Wholesale & retail | 2021 |
| Communicast Ltd | Information & communication | 2016 |
| Communication Generation Ltd. | Information & communication | 2014 |
| Community Action Hampshire | Other services | 1996 |
| Community for Serenity CIC | Education | 2025 |
| Compact Lifting Services Limited | Construction | 2019 |
| Company Avenue Road Holdings Ltd | Real estate | 2020 |
| Compass Marketing UK Limited | Professional & scientific | 2016 |
| Compass Software Limited | Information & communication | 2017 |
| Compassion Mastery Ltd | Health & social care | 2019 |
| Complete Commercial Fitouts Ltd | Construction | 2015 |
| Composite Boatworks Limited | Manufacturing | 2019 |
| Compton and Shawford Sports and Community Club Limited | Arts & recreation | 2025 |
| Compton Asset Holdings Limited | Financial services | 2026 |
| Concept 1ST Limited | Professional & scientific | 2019 |
| Concerto Television Limited | Information & communication | 2022 |
| Concrete 247 Limited | Construction | 2023 |
| Concrete Wellies Ltd | Construction | 2020 |
| Concretepost Investments Limited | Administrative & support | 2019 |
| Concursys Limited | Professional & scientific | 2026 |
| Conder Midlands Limited | Professional & scientific | 1956 |
| Conformitas Consulting Limited | Administrative & support | 2011 |
| Congburn Estates Land Profits Ltd | Real estate | 2024 |
| Conkers Inns Ltd | Hospitality | 2025 |
| Connaught Square Winchester RTM Company Limited | Households | 2020 |
| Connect Interactive Ltd | Information & communication | 2017 |
| Connect TV Limited | Information & communication | 2010 |
| Connex Fibre Limited | Information & communication | 2022 |
| Connex Hotels and Events Limited | Administrative & support | 2015 |
| Consilia Capital Ltd | Financial services | 2012 |
| Consilis Limited | Professional & scientific | 2022 |
| Constellation Search Limited | Administrative & support | 2022 |
| Constrall Ltd | Construction | 2024 |
| Construction by Hand Limited | Construction | 2023 |
| Consub Construction Limited | Professional & scientific | 2022 |
| Consult Cleo Limited | Administrative & support | 2021 |
| Contented Panda Ltd | Hospitality | 2024 |
| Contextful Limited | Professional & scientific | 2021 |
| Continuum Control Limited | Financial services | 2024 |
| Continuum Ltd | Professional & scientific | 2003 |
| Continuum Property Limited | Real estate | 2024 |
| Contour Orthodontists E Ltd | Health & social care | 2022 |
| Contrast Recovery & Wellness Ltd | Arts & recreation | 2026 |
| Control Union (UK) Limited | Professional & scientific | 1973 |
| Conversation Guide Technologies Ltd | Education | 2025 |
| Converse Technology Limited | Professional & scientific | 2007 |
| Cook Academy Limited | Education | 2007 |
| Coolever Ltd | Administrative & support | 2017 |
| Coombe Garage Tyres Limited | Extraterritorial | 2009 |
| Cooper Trustees Limited | Extraterritorial | 2012 |
| Copoco Ltd | Wholesale & retail | 2021 |
| Copperwood and Stone Ltd | Construction | 2009 |
| Copy & TV Ltd | Other services | 2013 |
| Copy Right Communications Limited | Professional & scientific | 2025 |