| CND Promotions Ltd | Professional & scientific | 2023 |
| CNI Security Solutions Limited | Information & communication | 2025 |
| CNP Peret Ltd | Transport & logistics | 2019 |
| Coalition Presents Limited | Arts & recreation | 2005 |
| Coalport Consultants Ltd | Professional & scientific | 2025 |
| Cobal Ltd | Other services | 2019 |
| Cobra Seats Holding Limited | Professional & scientific | 2009 |
| Cobra Seats Limited | Manufacturing | 1978 |
| Coco & AVO Ltd | Wholesale & retail | 2021 |
| Cocoa TAN Ltd | Other services | 2021 |
| Code Labx Ltd | Information & communication | 2019 |
| Coded Mind Clothing Ltd | Manufacturing | 2022 |
| Codemakr Software Limited | Information & communication | 2013 |
| Codextensions Ltd | Information & communication | 2019 |
| Codfather Telford Ltd | Wholesale & retail | 2024 |
| Codsall Community Nursery Limited | Health & social care | 2021 |
| Cody Jones Ltd | Administrative & support | 2016 |
| Coffee at NO 67 Ltd | Hospitality | 2025 |
| Coffee Escape Limited | Hospitality | 2025 |
| Coffee Logistics Limited | Wholesale & retail | 2002 |
| Coffee MUG Ltd | Hospitality | 2025 |
| Coffee on the Cobbles Ltd | Hospitality | 2026 |
| Coglyn Properties Limited | Real estate | 2024 |
| Cogmic Search Limited | Professional & scientific | 2024 |
| Cognition IT Asset Management Limited | Information & communication | 2023 |
| COJ Ltd | Transport & logistics | 2019 |
| Colada Group Ltd | Information & communication | 2018 |
| Cold Blooded Ltd | Wholesale & retail | 2025 |
| Cold Formed Consulting Ltd | Construction | 2025 |
| Coleman 1967 Limited | Extraterritorial | 2014 |
| Coleman Estates Ltd | Real estate | 1999 |
| Colemore Investments Limited | Real estate | 2022 |
| COLLAB365 Limited | Information & communication | 2021 |
| Collabco Ltd | Information & communication | 2008 |
| Collard Repro Limited | Manufacturing | 1991 |
| Collectivenex Ltd | Other services | 2023 |
| Collectmywaste Ltd | Water & waste | 2008 |
| College Trainer Ltd | Education | 2020 |
| Colour ME Bright Limited | Education | 2025 |
| Colours by MAT Limited | Wholesale & retail | 2017 |
| Columbus Twenty Seven Limited | Administrative & support | 2010 |
| Comaza Ltd | Other services | 2019 |
| Combicert Ltd | Construction | 2019 |
| Come to Fruition Holdings Ltd | Financial services | 2022 |
| Comfort Displacement Limited | Construction | 2019 |
| Comfort Sustainability Limited | Construction | 2010 |
| Comfyride Private Hire Ltd | Transport & logistics | 2024 |
| Commax Healthcare Solutions Ltd | Health & social care | 2026 |
| Commercial Assistance Ltd | Administrative & support | 2022 |
| Commercial Laundry Sales & Maintenance Limited | Other services | 2002 |
| Common Cultured Ltd | Wholesale & retail | 2023 |
| Commsway Rigging Limited | Information & communication | 2021 |
| Community Space Asset Management | Administrative & support | 2018 |
| Communitysync Ltd | Other services | 2023 |
| Company Select (UK) Limited | Professional & scientific | 2008 |
| Company Select Business Services Limited | Extraterritorial | 2020 |
| Company Select Limited | Extraterritorial | 2021 |
| Comparethewhey.Co.Uk Ltd | Professional & scientific | 2021 |
| Compelling Media Ltd | Information & communication | 2016 |
| Competitors Companion Limited | Arts & recreation | 2000 |
| Complete Development Group Ltd | Construction | 2014 |
| Complete Diagnostics Limited | Wholesale & retail | 2019 |
| Complex Care Group Ltd | Public administration | 2020 |
| Comply Express Limited | Professional & scientific | 2019 |
| Compomotive International Limited | Wholesale & retail | 1980 |
| Component Developments Limited | Manufacturing | 2000 |
| Composed Consulting Ltd | Professional & scientific | 2023 |
| Comprehensive Industrial Supplies Limited | Administrative & support | 2003 |
| Computer Therapy Ltd | Information & communication | 2008 |
| Concept Service Group Limited | Construction | 2020 |
| Concise Content Limited | Information & communication | 2023 |
| Concorde Auto Recovery Ltd | Wholesale & retail | 2025 |
| Concorde Logistics Ltd | Transport & logistics | 2025 |
| Concorde Tyres Ltd | Wholesale & retail | 2021 |
| Concorde UK Investments Ltd | Real estate | 2024 |
| Condor Mobile Co Ltd | Hospitality | 2025 |
| Conexis Limited | Professional & scientific | 2005 |
| Connect Consultancy (Shropshire) Limited | Professional & scientific | 2015 |
| Connect Hygiene Products Ltd | Manufacturing | 2013 |
| Connect Living Limited | Real estate | 2021 |
| Connect Psychological Services Limited | Health & social care | 2014 |
| Connected Mobiles Limited | Wholesale & retail | 2021 |
| Connexinet Limited | Information & communication | 2005 |
| Connexis Limited | Information & communication | 1997 |
| Connies Cakes Ltd | Manufacturing | 2026 |
| Conquerx Limited | Information & communication | 2012 |
| Conroy Property Limited | Real estate | 2024 |
| Consco Limited | Information & communication | 2025 |
| Conservatherm Solutions Ltd | Other services | 2016 |
| Constancia Holdings Limited | Information & communication | 2026 |
| Constancia Trading Limited | Information & communication | 2026 |
| Construction Consultative Solutions Ltd | Professional & scientific | 2020 |
| Contract Services (Wolverhampton & Wrekin) Limited | Administrative & support | 1996 |
| Conveyancing First Limited | Professional & scientific | 2003 |
| Cooga Ltd | Manufacturing | 2012 |
| Cooke and Millward Limited | Information & communication | 2018 |
| Cooksey Digital Ltd | Information & communication | 2026 |
| Cool Rummings Limited | Wholesale & retail | 2021 |
| Coolbridge Freight Services Ltd | Transport & logistics | 2025 |
| Cooper and Sage Investments Ltd | Real estate | 2023 |