| Countrylarge Estates Limited | Financial services | 2015 |
| Countrylarge Limited | Construction | 2010 |
| Countrylarge Portfolio Limited | Real estate | 2014 |
| Countrylarge Properties Limited | Real estate | 2017 |
| Countryman Defence Limited | Manufacturing | 2005 |
| Countrypride Ltd | Wholesale & retail | 2018 |
| Countrystar Limited | Real estate | 2022 |
| Countrywise Properties Ltd | Real estate | 2025 |
| County Carpets Leeds Limited | Wholesale & retail | 2018 |
| County Commercials Yorkshire Ltd | Wholesale & retail | 2025 |
| County Estates Holdings Limited | Real estate | 2021 |
| County Guards Limited | Administrative & support | 2020 |
| County Roofing Services Ltd | Construction | 2021 |
| County Scaffolding Services Limited | Construction | 1987 |
| County Surfacing Contractors Ltd | Construction | 2025 |
| Coupling Services Limited | Manufacturing | 2009 |
| Couplings International Ltd | Manufacturing | 2022 |
| Courageous Work Ltd | Professional & scientific | 2025 |
| COURIER2 Ltd | Transport & logistics | 2025 |
| COURIERCC85 Ltd | Transport & logistics | 2024 |
| Courierkln Ltd | Transport & logistics | 2025 |
| Couriers Delivery by ADI Limited | Transport & logistics | 2025 |
| Couriers Delivery by CAP Limited | Transport & logistics | 2025 |
| Court Barton (Clifford) Management Company Limited | Real estate | 2006 |
| Courtesan Beauty Ltd | Wholesale & retail | 2024 |
| Courtshill Limited | Real estate | 1987 |
| Courtvale Limited | Administrative & support | 1987 |
| Courtyard Developments Ltd | Real estate | 1995 |
| Cousins & Whalley Ltd | Health & social care | 2024 |
| Cousins Property Holdings Ltd | Real estate | 2018 |
| Couture Events by Nadia Limited | Arts & recreation | 2019 |
| Cova Construction Ltd | Real estate | 2025 |
| Cove Collections Ltd | Manufacturing | 2025 |
| Cove Financial Planning (Leeds) Limited | Financial services | 2023 |
| Cove Financial Planning Limited | Extraterritorial | 2024 |
| Coveena Properties Limited | Households | 2023 |
| Coventryutil Limited | Households | 2025 |
| Cover Guard UK Ltd | Administrative & support | 2019 |
| Coverings Ltd | Professional & scientific | 2019 |
| Covers 33 Vinyl Records Ltd | Wholesale & retail | 2024 |
| Coversure Insurance Services (Bradford) Limited | Financial services | 2013 |
| Covertek Limited | Manufacturing | 2018 |
| Covvi Limited | Professional & scientific | 2017 |
| COW Hold Limited | Wholesale & retail | 2012 |
| Cowabconsulting Limited | Professional & scientific | 2021 |
| Cowabgroup Limited | Professional & scientific | 2021 |
| Cowboys Takeaway Limited | Hospitality | 2025 |
| Cowie Consultancy Services Limited | Professional & scientific | 2016 |
| Cowl Ltd | Manufacturing | 2012 |
| Cowling Consultants Limited | Information & communication | 2023 |
| Cowling Court Management Limited | Households | 2005 |
| Cowling Rawnsley Financial Solutions Limited | Financial services | 2004 |
| Cowspace Limited | Transport & logistics | 2019 |
| COX & Flight Financial Solutions Ltd | Financial services | 2021 |
| COX Automotive Europe Limited | Administrative & support | 2025 |
| COX Automotive EV Battery Solutions Limited | Financial services | 2022 |
| COX Automotive UK Limited | Other services | 1996 |
| Coyle Homes Ltd. | Administrative & support | 2022 |
| Coyle Plant and Groundworks Ltd | Construction | 2023 |
| Coyne Property Maintenance Limited | Construction | 2012 |
| Coyotoes Recruitment Ltd | Administrative & support | 2025 |
| Coze Creative Limited | Administrative & support | 2017 |
| Cozy Box Limited | Wholesale & retail | 2024 |
| Cozy Companion Ltd | Wholesale & retail | 2021 |
| Cozy Home Furniture Ltd | Wholesale & retail | 2025 |
| Cozy Livin Company Ltd | Wholesale & retail | 2025 |
| Cozy Weave Ltd | Wholesale & retail | 2025 |
| CP Foundations Ltd | Construction | 2024 |
| CP Hypnotherapy Training Leeds Ltd | Education | 2024 |
| CP Painting & Decorating Ltd | Construction | 2024 |
| CP ROE Associates Ltd | Professional & scientific | 2020 |
| CP Secure Ltd | Construction | 2023 |
| CP Venue Consulting Ltd | Professional & scientific | 2018 |
| CP Viability Limited | Professional & scientific | 2016 |
| CPC Training Provider Ltd | Education | 2012 |
| Cpce Services Limited | Construction | 2025 |
| CPG Security Ltd | Administrative & support | 2018 |
| CPH Light Haulage Ltd | Transport & logistics | 2006 |
| CPI Corporate Solutions Ltd. | Wholesale & retail | 2001 |
| CPJ Medical Limited | Health & social care | 2014 |
| CPL Project Delivery Solutions Limited | Information & communication | 2025 |
| Cpmcp & Family Investments LLP | | 2024 |
| CPR (Leeds) Limited | Real estate | 2016 |
| CPR Bar Co Ltd | Hospitality | 2025 |
| CPR Business Management Ltd | Professional & scientific | 2020 |
| CPR Manufacturing Limited | Manufacturing | 2000 |
| CPR Realisations Limited | Construction | 1988 |
| Cprime Limited | Information & communication | 1998 |
| Cpubs White Swan Ltd | Hospitality | 2026 |
| CPV2025 Limited | Administrative & support | 2025 |
| CPX Consulting Limited | Professional & scientific | 2024 |
| CPX Electrical Ltd | Construction | 2024 |
| CQC Medisolutions Limited | Other services | 2025 |
| Cquent Ltd | Information & communication | 2023 |
| CR Architecture Ltd | Professional & scientific | 2025 |
| CR Risk & Compliance Ltd | Professional & scientific | 2020 |
| CR0BAR Limited | Information & communication | 2010 |
| Crabbers Limited | Real estate | 2017 |
| Crabtree & Hill Group Limited | Financial services | 2021 |
| Crabtree & Hill Limited | Construction | 2001 |