| COMWAT-106 Limited Partnership | | 2020 |
| Comworld Ltd | Wholesale & retail | 2015 |
| CON & Tran Limitd Limited | Construction | 2023 |
| CON Construction and Gardening Limited | Construction | 2025 |
| Conaghan Auto Centre Limited | Wholesale & retail | 2012 |
| Concatenate Technology Ltd | Administrative & support | 2021 |
| Concentric Birmingham Limited | Manufacturing | 1960 |
| Concentric Lovell Limited | Professional & scientific | 1957 |
| Concentricus UK Limited | Real estate | 2020 |
| Concentrique Ltd | Construction | 2017 |
| Concept Care & Consultancy Services Ltd | Health & social care | 2013 |
| Concept Care Limited | Administrative & support | 2022 |
| Concept Coders Limited | Information & communication | 2001 |
| Concept Energy Ltd | Construction | 2024 |
| Concept Estates UK Limited | Real estate | 2005 |
| Concept Financial Services Ltd | Professional & scientific | 2022 |
| Concept Foods and Events Limited | Hospitality | 2020 |
| Concept Forward Limited | Professional & scientific | 2003 |
| Concept Hair & Beauty Ltd | Other services | 2010 |
| Concept Homes (Birmingham) Ltd | Real estate | 2008 |
| Concept Jewellers UK Limited | Wholesale & retail | 2021 |
| Concept Mouldings Limited | Manufacturing | 1989 |
| Concept Project Line Limited | Administrative & support | 2008 |
| Concept Resourcing Limited | Administrative & support | 2008 |
| Concept Restorations Limited | Wholesale & retail | 2016 |
| Concept Service Solutions Ltd | Construction | 2025 |
| Concept Services (Htts) Limited | Professional & scientific | 2017 |
| Concept Shading Solutions Ltd. | Wholesale & retail | 2008 |
| Conceptpad Limited | Professional & scientific | 2019 |
| Concepts and Solutions Ltd | Wholesale & retail | 2020 |
| Concepts by Maddox Ltd | Wholesale & retail | 2026 |
| Concor Renu Limited | Wholesale & retail | 2014 |
| Concord House Management Company Limited | Households | 2005 |
| Concord Housing Group Ltd | Real estate | 2019 |
| Concorde Freight Ltd | Transport & logistics | 2020 |
| Concordia International Ltd | Information & communication | 2015 |
| Concordia Investments Limited | Real estate | 2007 |
| Concours Plating Ltd | Manufacturing | 2018 |
| Concrete Accounts Ltd | Professional & scientific | 2023 |
| Concrete Care Specialists Ltd | Construction | 2025 |
| Concrete Compare Ltd | Administrative & support | 2023 |
| Concrete Corrosion Tech Ltd | Manufacturing | 2021 |
| Concrete Pump Hire West Midlands Ltd | Administrative & support | 2021 |
| Concrete Repair and Grouting Limited | Wholesale & retail | 1984 |
| Concrete Transport Association Limited | Professional & scientific | 2025 |
| CONCRETE35 Ltd | Construction | 2026 |
| Concurrent Engineering Limited | Information & communication | 1991 |
| Concurrent Synergies Ltd | Information & communication | 2014 |
| Condati Medical Ltd | Health & social care | 2026 |
| Conde & Conde Ltd | Real estate | 2023 |
| Conde Taylor Limited | Administrative & support | 2016 |
| Condor Software Limited | Information & communication | 2022 |
| Conductive Music C.I.C. | Information & communication | 2014 |
| Conewood Consulting Ltd. | Professional & scientific | 2016 |
| Conexus Engineering Consultancy Ltd | Professional & scientific | 2025 |
| Conference Aston Limited | Hospitality | 2000 |
| Conference Solutions Limited | Professional & scientific | 1997 |
| Conferred Ltd | Information & communication | 2022 |
| Confiable Solutions Ltd | Transport & logistics | 2024 |
| Conficiens Limited | Information & communication | 2022 |
| Confidence Investments Ltd | Wholesale & retail | 2019 |
| Confidence Property Management Ltd | Real estate | 2023 |
| Confident & Calm Therapy and Coaching Limited | Health & social care | 2017 |
| Confidents Denture Clinic Limited | Health & social care | 2011 |
| Configure Housing Limited | Real estate | 2024 |
| Conform Developments Limited | Construction | 2000 |
| Conformita Consultancy Ltd | Other services | 2010 |
| Congo Connect Limited | Extraterritorial | 2019 |
| Congolese Community of Birmingham CIC | Education | 2026 |
| Congolese Engineers Network Association CIC | Professional & scientific | 2022 |
| Congrave Way Residents Management Company Limited | Households | 2022 |
| Congreve Roofing Limited | Construction | 2011 |
| Conifer Court Freeholders Limited(The) | Households | 1987 |
| Conifers Day Nursery KN Limited | Health & social care | 2022 |
| Conigital Ltd | Information & communication | 2015 |
| Conihaircandy Ltd | Wholesale & retail | 2024 |
| Conker Financial Solutions Limited | Professional & scientific | 2026 |
| Conlon Development Limited | Construction | 2019 |
| Conn Industry Conn Ltd | Construction | 2023 |
| Connacht Limited | Construction | 2002 |
| Connaire Contractors Ltd | Construction | 2018 |
| Connaught Plant Hire Limited | Construction | 1999 |
| Connaught Resourcing Limited | Administrative & support | 2003 |
| Connect 1 Property Ltd | Real estate | 2026 |
| Connect and Learn Limited | Education | 2025 |
| Connect AV Ltd | Administrative & support | 2025 |
| Connect BD Limited | Wholesale & retail | 2019 |
| Connect Care & Support Limited | Health & social care | 2015 |
| Connect Deliver Limited | Transport & logistics | 2022 |
| Connect Digital Consulting Group Ltd | Information & communication | 2023 |
| Connect Digital Solutions Limited | Information & communication | 2008 |
| Connect Engagement Ltd | Administrative & support | 2019 |
| Connect Executive Cars Limited | Transport & logistics | 2015 |
| Connect House Ltd | Real estate | 2023 |
| Connect Housing Limited | Health & social care | 2024 |
| Connect HR Legal Limited | Administrative & support | 2020 |
| Connect PDI Limited | Administrative & support | 2011 |
| Connect Van Vista Logistics Ltd | Transport & logistics | 2024 |
| Connect Zone Limited | Wholesale & retail | 2026 |
| Connectdba Limited | Information & communication | 1996 |