| Canol Coffee Ltd | Hospitality | 2026 |
| Canolfan Cyfrifiadurol Datrys Computer Centre Ltd | Manufacturing | 1988 |
| Canoole Marketing Ltd | Professional & scientific | 2025 |
| Canopy CBI Ltd | Financial services | 2020 |
| Canopy Finco Limited | Administrative & support | 2024 |
| Canopy Inc Limited | Information & communication | 2026 |
| Canopy Topco Limited | Administrative & support | 2024 |
| Canplt Global Limited | Wholesale & retail | 2024 |
| Cans London Ltd | Wholesale & retail | 2025 |
| Cansford Associates Limited | Professional & scientific | 2005 |
| Cansford Laboratories Limited | Health & social care | 2010 |
| Cantal Ltd | Real estate | 2008 |
| Canteen Social Limited | Hospitality | 2017 |
| Canter Golf Limited | Arts & recreation | 2015 |
| Canterbury Trade Limited | Wholesale & retail | 2021 |
| Cantina Workwear Limited | Wholesale & retail | 2025 |
| Canton 126 Property Limited | Real estate | 2026 |
| Canton Auto Ltd | Wholesale & retail | 2019 |
| Canton Construction Limited | Construction | 2000 |
| Canton Court Flats 69-77 Management Company Limited | Households | 2013 |
| Canton Curry House Ltd | Hospitality | 2024 |
| Canton Discount Limited | Wholesale & retail | 2012 |
| Canton European Shop Ltd | Wholesale & retail | 2019 |
| Canton Food Store Ltd | Wholesale & retail | 2022 |
| Canton Health Clinic Ltd | Health & social care | 2022 |
| Canton Mobiles Dealer Limited | Wholesale & retail | 2017 |
| Canton MOT & Service Station Ltd | Wholesale & retail | 2026 |
| Canton Optical Ltd | Wholesale & retail | 2010 |
| Canton Pizza Limited | Hospitality | 2025 |
| Canton Shop Limited | Wholesale & retail | 2025 |
| Canton Tea Co. Limited | Wholesale & retail | 2007 |
| Canton Tyre Services Ltd | Wholesale & retail | 2026 |
| Canuta Property Company Limited | Real estate | 2002 |
| Canveo Limited | Information & communication | 2020 |
| Canware Limited | Wholesale & retail | 2022 |
| CAP Energy Solutions Limited | Wholesale & retail | 2020 |
| CAP Journey Limited | Professional & scientific | 2024 |
| CAP Solar Partners Limited | Wholesale & retail | 2020 |
| Cap-X Venture Partners Ltd | Information & communication | 2025 |
| Capalekh Ltd | Wholesale & retail | 2025 |
| Capara Construction Ltd | Construction | 2019 |
| Caparison Guitar Co. Ltd | Wholesale & retail | 2011 |
| Cape Engineering Ltd | Professional & scientific | 2025 |
| Cape Services Ltd | Construction | 2022 |
| Cape Shareholder Trustee Limited | Administrative & support | 2024 |
| Capella Trade Ltd | Wholesale & retail | 2025 |
| Capello Barbers Bristol Ltd | Other services | 2023 |
| Capello Barbers Ltd | Other services | 2020 |
| Capello Barbers Pontcanna Ltd | Other services | 2023 |
| Capester Limited | Wholesale & retail | 2022 |
| Capex Global Solution Ltd | Information & communication | 2025 |
| Capilo Crew Limited | Administrative & support | 2025 |
| Capita Security Limited | Administrative & support | 2001 |
| Capital 1 EMI Ltd | Financial services | 2020 |
| Capital Academy of Gymnastics Limited | Arts & recreation | 2026 |
| Capital Academy of Sport Limited | Arts & recreation | 2011 |
| Capital Air Conditioning (Wales) Limited | Energy | 2011 |
| Capital Apartments Ltd. | Real estate | 2002 |
| Capital Asset Partners Ltd | Wholesale & retail | 2019 |
| Capital Brilliance Group Ltd | Public administration | 2025 |
| Capital Care Homes Limited | Health & social care | 2005 |
| Capital Care Solutions Ltd | Transport & logistics | 2012 |
| Capital Chippy Limited | Hospitality | 2025 |
| Capital Cleaning Cardiff Limited | Administrative & support | 2021 |
| Capital Coins Ltd | Information & communication | 2017 |
| Capital Communications Limited | Information & communication | 2012 |
| Capital Conversions Limited | | 1980 |
| Capital Drug Development Ltd | Professional & scientific | 2020 |
| Capital Equities Limited | Construction | 2019 |
| Capital Events Management Ltd | Arts & recreation | 2008 |
| Capital Fire Protection Limited | Other services | 2005 |
| Capital Fish Bar Cardiff Ltd | Hospitality | 2018 |
| Capital Foods UK Limited | Wholesale & retail | 2025 |
| Capital Funding & Partners Ltd | Financial services | 2024 |
| Capital Gain Investments Limited | Real estate | 2017 |
| Capital Guaranteed Rent Ltd | Administrative & support | 2016 |
| Capital Guarding Limited | Administrative & support | 2019 |
| Capital Holder | Financial services | 2014 |
| Capital Homes Elsenham 2018 Limited | Households | 2018 |
| Capital Human Resources Limited | Administrative & support | 2005 |
| Capital International Incorporation Ltd | Information & communication | 2024 |
| Capital Labour Solutions Ltd | Construction | 2025 |
| Capital Law & People Limited | Administrative & support | 1985 |
| Capital Law Holdings Limited | Financial services | 2024 |
| Capital Law Limited | Professional & scientific | 2006 |
| Capital Law LLP | | 2006 |
| Capital Law Nominees Limited | Professional & scientific | 1998 |
| Capital Law Solicitors Limited | Extraterritorial | 2009 |
| Capital Link Group Limited | Information & communication | 2020 |
| Capital London Logistics Ltd | Wholesale & retail | 2025 |
| Capital Management 1992 Ltd | Professional & scientific | 2014 |
| Capital Marketing Solutions Ltd | Information & communication | 2020 |
| Capital Mini Gym CIC | Arts & recreation | 2022 |
| Capital MOT & Service Ltd | Wholesale & retail | 2021 |
| Capital People Consultants Limited | Professional & scientific | 2000 |
| Capital Polishers Ltd. | Construction | 2007 |
| Capital Property Solutions Cardiff Limited | Construction | 2018 |
| Capital Quarter (Western Courtyard) Cardiff Management Limited | Real estate | 2017 |
| Capital Sheet Metal Limited | Manufacturing | 2011 |
| Capital Tyres Cardiff Ltd | Wholesale & retail | 2024 |