| Coppage Estates Ltd | Real estate | 2024 |
| Copper Beech Holdings Limited | Financial services | 2019 |
| Copper Beech Kitchen Ltd | Hospitality | 2024 |
| Coppernickle Ltd | Households | 2021 |
| Coppice Property Ltd | Real estate | 2025 |
| Core HSE Advisory Ltd | Professional & scientific | 2026 |
| Core Programme Management Solutions Ltd | Professional & scientific | 2022 |
| Core Supplements Ltd | Wholesale & retail | 2025 |
| Coreerp Solutions Ltd | Administrative & support | 2023 |
| Corereach Limited | Professional & scientific | 2024 |
| Cork Media and Marketing Ltd | Professional & scientific | 2026 |
| Corlata Ltd | Transport & logistics | 2020 |
| Cornelio Ecom Ltd | Wholesale & retail | 2022 |
| Cornell Iron Works Ltd | Manufacturing | 2015 |
| Cornerstone Authentic Care Ltd | Health & social care | 2020 |
| Cornerstone Connect Trading Limited | Transport & logistics | 2011 |
| Cornerstone Haulage Ltd | Transport & logistics | 2015 |
| Cornerstone Properties (Hinckley) Ltd | Real estate | 2026 |
| Corporate Media Supplies Limited | Administrative & support | 1992 |
| Corrplast Plastering Limited | Construction | 2021 |
| Cosmoline Ltd | Manufacturing | 2021 |
| Costelyno Limited | Transport & logistics | 2017 |
| Cosy Conservatory Conversions Ltd | Construction | 2026 |
| Cosy Times Stoves and Fireplaces Limited | Construction | 2022 |
| COSY4U Ltd | Real estate | 2025 |
| Cotton Coaches Ltd | Transport & logistics | 2024 |
| Cotton Commercials Ltd | Wholesale & retail | 2019 |
| Country Crafts Joinery Ltd | Manufacturing | 2020 |
| County a Limited | Wholesale & retail | 2003 |
| Courtesy Stars Limited | Hospitality | 2022 |
| COV Ltd | Information & communication | 2013 |
| Cove Bathrooms Ltd | Construction | 2026 |
| Coventry Car Sales Ltd | Wholesale & retail | 2015 |
| Coventry Cleaning Club Ltd | Administrative & support | 2025 |
| Coventry Collets Limited | Manufacturing | 2007 |
| Coventry Horseboxes Limited | Manufacturing | 2026 |
| Coventry Motor Factors Limited | Wholesale & retail | 2016 |
| Coventry Plumbing & Heating Supplies (Nuneaton) Limited | Wholesale & retail | 2010 |
| Coventry Sliding Wardrobes Ltd | Construction | 2013 |
| Coventry Worldwide Logistics Limited | Transport & logistics | 2017 |
| Covnetics Limited | Professional & scientific | 2010 |
| COW Lees Care Home Ltd | Health & social care | 2013 |
| CP Property Improvements Ltd | Construction | 2025 |
| Cpaintin Ltd | Manufacturing | 2026 |
| Cphp Ltd | Real estate | 2015 |
| Craftsman Properties Ltd | Real estate | 2025 |
| Craig Brown (Construction) Limited | Construction | 2020 |
| Craigsophie Limited | Extraterritorial | 2014 |
| Crane Pro Limited | Manufacturing | 2009 |
| Craven Streams Limited | Other services | 1987 |
| Crawford Collets Ltd | Manufacturing | 2022 |
| CRE8 Music Education Ltd | Education | 2011 |
| Creative Asset Holdings Limited | Real estate | 2026 |
| Creative Finish Ltd | Construction | 2025 |
| Creative Freight Limited | Transport & logistics | 2015 |
| Creative Holdings and Capital Ltd | Financial services | 2026 |
| Creative Media Communications Limited | Administrative & support | 1995 |
| Creative Nails Beauty Ltd | Other services | 2025 |
| Creative Property Services Limited | Households | 2024 |
| Creativescript Web Design Limited | Professional & scientific | 2020 |
| Creaton Construction Limited | Construction | 2013 |
| Crisan Spedition Ltd | Transport & logistics | 2019 |
| Criss ANA Services Ltd | Transport & logistics | 2020 |
| Cristi&Ela Limited | Transport & logistics | 2013 |
| Cristiano Transport Ltd | Transport & logistics | 2020 |
| Criterion Design Concepts Limited | Professional & scientific | 2004 |
| Croft Car Rental Ltd | Administrative & support | 2020 |
| Croft Car Sales Limited | Wholesale & retail | 2019 |
| Crona Ltd | Wholesale & retail | 2025 |
| Cropside Limited | Transport & logistics | 2022 |
| Cross Counties Couriers Ltd | Transport & logistics | 2023 |
| Crowhill Consulting Limited | Professional & scientific | 2014 |
| Crowhill Quality Butchers Limited | Wholesale & retail | 2003 |
| Crowlands Properties Ltd | Real estate | 2005 |
| Crown (Plant & Haulage) Limited | Transport & logistics | 2021 |
| Crown Aggregates Ltd | Mining & quarrying | 2017 |
| Crown Bazaar Ltd | Wholesale & retail | 2023 |
| Crown Landscaping & Fencing Ltd | Administrative & support | 2025 |
| Crown Ridge Roofing Ltd | Construction | 2026 |
| Crown Waste Limited | Water & waste | 2004 |
| Crown Waste Management Limited | Water & waste | 2004 |
| Crownfix Roofing & Guttering Ltd | Construction | 2025 |
| Crucial Transport Ltd | Transport & logistics | 2022 |
| Crystal Taxis Limited | Transport & logistics | 2018 |
| CS Plumbing Ltd Ltd | Construction | 2026 |
| CS Soft Services Limited | Administrative & support | 2025 |
| CSA Midlands Limited | Households | 2022 |
| CSL Industrial Roofing & Cladding Ltd | Construction | 2024 |
| CSL Industrial Roofing Services Limited | Construction | 2000 |
| CSM Homes Ltd | Construction | 2021 |
| CTJ Repairs Limited | Wholesale & retail | 2016 |
| Cumfi-It Ltd | Other services | 2012 |
| Cuneo Fine Arts Limited | Wholesale & retail | 2022 |
| Curriculum on Camera Ltd | Education | 2017 |
| Curry POT NUN Ltd | Hospitality | 2024 |
| Currykits Ltd | Manufacturing | 2025 |
| Curtains Made to Measure Ltd | Manufacturing | 2025 |
| Custodian Properties Ltd | Real estate | 2018 |
| Custom Roofing Solutions Ltd | Construction | 2025 |
| Customer Whisperers Limited | Professional & scientific | 2007 |