| Capclose ENT Ltd | Water & waste | 2025 |
| Capco Palmer Steels Limited | Wholesale & retail | 1984 |
| Capcroft Properties Ltd | Real estate | 2019 |
| Cape Breton Ltd | Construction | 2020 |
| Cape Hill Cosmetics Ltd | Wholesale & retail | 2019 |
| Cape Hill Homes Ltd | Construction | 2021 |
| Cape Range Surveys Limited | Administrative & support | 2005 |
| Capecita Ltd | Health & social care | 2022 |
| Capehill Company Ltd | Hospitality | 2021 |
| Capel Developments Limited | Real estate | 1960 |
| Capella Properties Limited | Real estate | 2021 |
| Capelli's (Birmingham) Ltd | Other services | 2013 |
| Capi.Three Company Limited | Real estate | 2020 |
| Capilano Limited | Real estate | 2020 |
| Capital 390 Ltd | Real estate | 2020 |
| Capital Brothers Ltd | Transport & logistics | 2024 |
| Capital Citi Group Limited | Transport & logistics | 2023 |
| Capital City Group Ltd | Wholesale & retail | 2021 |
| Capital Cleaners Birmingham Limited | Administrative & support | 2025 |
| Capital Complete Solutions - Inspections Limited | Real estate | 2023 |
| Capital Complete Solutions - Maintenance Limited | Real estate | 2022 |
| Capital Complete Solutions Limited | Real estate | 2021 |
| Capital Concrete & Screeds Ltd | Wholesale & retail | 2017 |
| Capital Construction & Design Ltd | Construction | 2021 |
| Capital Corporation (Holdings) Limited | Extraterritorial | 1991 |
| Capital DC Ltd | Professional & scientific | 2020 |
| Capital Dynamics Clean Energy and Infrastructure III LP | | 2015 |
| Capital Dynamics Clean Energy and Infrastructure LP | | 2011 |
| Capital Dynamics European Co-Investment Fund LP | | 2007 |
| Capital Dynamics Mid-Market Direct IV, LP | | 2015 |
| Capital Dynamics Mmdiv UK Ltd | Financial services | 2018 |
| Capital Dynamics Mmdv UK Ltd | Financial services | 2021 |
| Capital Dynamics Red Rose Infrastructure 2 LP | | 2014 |
| Capital Dynamics Sscp Limited | Financial services | 2019 |
| Capital E & U Ltd | Financial services | 2018 |
| Capital Enhancement Corporation Ltd | Administrative & support | 2017 |
| Capital Enterprise WM Limited | Administrative & support | 2015 |
| Capital Fruit Traders Limited | Wholesale & retail | 2026 |
| Capital Furnishings Limited | Wholesale & retail | 2014 |
| Capital Group (PVT) Ltd | Hospitality | 2024 |
| Capital Group Property Limited | Real estate | 2018 |
| Capital Group Services Limited | Construction | 2017 |
| Capital Haulage Limited | Transport & logistics | 2020 |
| Capital Healthcare Limited | Health & social care | 2020 |
| Capital House Estates Ltd | Real estate | 2023 |
| Capital Integration Systems UK Limited | Information & communication | 2022 |
| Capital Investments (Midlands) Ltd | Real estate | 2016 |
| Capital Karts Star City Limited | Arts & recreation | 2023 |
| Capital Letters Limited | Manufacturing | 1998 |
| Capital Links Consulting Ltd | Professional & scientific | 2025 |
| Capital Management CFP Ltd | Professional & scientific | 2006 |
| Capital MG Ltd | Professional & scientific | 2024 |
| Capital Motors & Hires Ltd | Wholesale & retail | 2026 |
| Capital Outsourcing Group (UK) Limited | Financial services | 2006 |
| Capital Outsourcing Group Food Limited | Administrative & support | 2008 |
| Capital Outsourcing Group Limited | Administrative & support | 2006 |
| Capital Outsourcing Limited | Extraterritorial | 2019 |
| Capital Pharma Limited | Administrative & support | 2016 |
| Capital Properties & Investments Ltd | Real estate | 2005 |
| Capital Property Ventures Ltd | Real estate | 2015 |
| Capital Rise Holdings Ltd | Construction | 2024 |
| Capital Sparkys Ltd | Construction | 2021 |
| Capital Sterling Limited | Financial services | 2019 |
| Capital-Property-Inspections Limited | Real estate | 2017 |
| Capitalcore Ventures Limited | Real estate | 2024 |
| Capitalise Holdings Ltd | Financial services | 2024 |
| Capitalistbook Accountant Limited | Professional & scientific | 2016 |
| Capitax & Co (Tax Consultants) Ltd. | Professional & scientific | 2002 |
| Capitax Financial Services Ltd. | Professional & scientific | 2019 |
| Capitax Property Services Ltd. | Administrative & support | 2008 |
| Capitax Wills & Estates Ltd | Other services | 2026 |
| Capitol Cinemas Limited | Arts & recreation | 2018 |
| Capitol Property Investments Ltd | Real estate | 2024 |
| Capitol W.B.C. Management Limited | Administrative & support | 2016 |
| Caplor Energy Limited | Energy | 2001 |
| Capo DI Moda Ltd | Wholesale & retail | 2024 |
| Capobrid Technologies Ltd | Wholesale & retail | 2021 |
| Capoeira SOL C.I.C. | Education | 2026 |
| Cappella Chaplaincy Ltd | Health & social care | 2024 |
| Cappfinity Limited | Information & communication | 2009 |
| Cappuccino Coffee Machine Company Limited(The) | Manufacturing | 1985 |
| Capri Clean Cleaning Company Ltd | Administrative & support | 2025 |
| Capri Property Automation Ltd | Construction | 2022 |
| Capri Property Management Ltd | Real estate | 2017 |
| Capricorn Coating Services Limited | Manufacturing | 2002 |
| Capricorn Construction (Building Services) Ltd | Construction | 2026 |
| Capricorn Performance Ltd | Wholesale & retail | 2023 |
| Capricorn Wholesale Supplies Limited | Hospitality | 2011 |
| Capshore Partners | Financial services | 2017 |
| Capsmart Trading Limited | Hospitality | 2013 |
| Capstart Property Limited | Hospitality | 2015 |
| Capstone Hats Ltd | Manufacturing | 2024 |
| Capstone Security Ltd | Hospitality | 2021 |
| Capsule Events Limited | Arts & recreation | 2010 |
| Capsule UK Limited | Arts & recreation | 2002 |
| Captain COD Limited | Hospitality | 1999 |
| Captain Development Group Ltd | Professional & scientific | 2026 |
| Captain Hook Ltd | Hospitality | 2023 |
| Captain Johns Ltd | Hospitality | 2026 |
| Captain Kandy Weston-Super-Mare Limited | Wholesale & retail | 2022 |