| CJ Pharma Services Ltd | Professional & scientific | 2015 |
| CJ PUB Management Limited | Hospitality | 2024 |
| Cjae Limited | Health & social care | 2016 |
| CJC Pro-Consulting Ltd | Professional & scientific | 2021 |
| Ckbt Lettings Ltd | Extraterritorial | 2019 |
| CL Associates Limited | Professional & scientific | 2019 |
| Clairmont Associates Ltd | Administrative & support | 2026 |
| Clarke IT Solutions Ltd | Information & communication | 2025 |
| Clarkes Crankshaft Limited | Manufacturing | 1990 |
| Claypool Limited | Manufacturing | 2008 |
| Clean Bins Midlands Ltd | Administrative & support | 2025 |
| Clean Slate Entertainment Limited | Information & communication | 2014 |
| Cleanliness at Home Ltd | Administrative & support | 2025 |
| Clear Gutters Ltd | Administrative & support | 2026 |
| Clear Water Events Ltd | Administrative & support | 2010 |
| Clearance Zone UK Ltd | Wholesale & retail | 2025 |
| Clearholt Limited | Transport & logistics | 2025 |
| Clearview Environmental (Midlands) Limited | Administrative & support | 2018 |
| Clearwater Education Limited | Education | 2022 |
| Cledoplumbing Ltd | Construction | 2025 |
| Clent (Halesowen) Limited | Households | 1982 |
| Clent View Antiques & Collectables Ltd | Wholesale & retail | 2026 |
| Cleo Cosmetic Clinic Limited | Health & social care | 2023 |
| Cleobury Energy Solutions Ltd | Professional & scientific | 2019 |
| CLG Market Research UK Ltd | Professional & scientific | 2016 |
| Climtec Ltd | Wholesale & retail | 2025 |
| Clive Lloyd Butchers Limited | Wholesale & retail | 2002 |
| Clor Estate Planning Limited | Professional & scientific | 2009 |
| Cloud Ninjas Ltd | Information & communication | 2015 |
| CLOUD9 Care Staffing Ltd | Health & social care | 2023 |
| Clrvwphmcy Ltd | Wholesale & retail | 2025 |
| Club Autosports Limited | Wholesale & retail | 1989 |
| CM Meats Ltd | Wholesale & retail | 2026 |
| Cmac Computer Systems Limited | Information & communication | 1990 |
| CMJ Developments Limited | Construction | 2025 |
| CN Live Productions Limited | Arts & recreation | 2024 |
| CNC Maintenance Solutions Ltd | Manufacturing | 2019 |
| Coach Hire Plus Ltd. | Information & communication | 2014 |
| Coached by Brooke Ltd | Arts & recreation | 2021 |
| Coast 2 Coast Developments Limited | Construction | 2010 |
| COAST2COAST Land Limited | Extraterritorial | 2015 |
| Coates Associates Ltd | Professional & scientific | 2020 |
| Coates Estates Limited | Real estate | 2020 |
| Cobel Creative Limited | Information & communication | 2023 |
| Coconut Thinking Ltd | Professional & scientific | 2025 |
| Coda Developments Limited | Construction | 2018 |
| Coffee @ Cogs Ltd | Hospitality | 2022 |
| Coldon Limited | | 1986 |
| Colin Barrett Ltd | Extraterritorial | 2023 |
| Collegno Solutions Ltd | Information & communication | 2023 |
| Colour Box Consultants Ltd | Information & communication | 2017 |
| Colour Cubed Holdings Limited | Professional & scientific | 2018 |
| Colt Material Solutions Ltd | Wholesale & retail | 2014 |
| Commercial Finance Insight Limited | Professional & scientific | 2013 |
| Community Action Wyre Forest | Other services | 2000 |
| Community Support Initiatives Ltd | Education | 2010 |
| Community Update Limited | Manufacturing | 2010 |
| Comordo Ltd | Information & communication | 2026 |
| Compass Corporate Solutions Limited | Professional & scientific | 2018 |
| Compassion; Care & Intergrity Ltd | Health & social care | 2018 |
| Comprehensive Access Solutions Ltd | Construction | 2015 |
| Computer Gear Limited | Extraterritorial | 2016 |
| Concept Accountancy Services Limited | Professional & scientific | 2016 |
| Concept Media Limited | Information & communication | 2021 |
| Concepts of Kitchens Ltd | Construction | 2022 |
| Concours Vehicles Limited | Transport & logistics | 2019 |
| Connan Limited | Professional & scientific | 2009 |
| Connect Construction Group Ltd | Construction | 2013 |
| Connect Construction Holdings Ltd | Financial services | 2024 |
| Connect Infrared Limited | Manufacturing | 2024 |
| Connect Services Building Solutions Ltd | Financial services | 2024 |
| Connectwise Ltd | Information & communication | 2008 |
| Connectwise S-K, UK Ltd. | Information & communication | 2014 |
| Connekt Gear Limited | Professional & scientific | 2011 |
| Connex Civils Limited | Construction | 2003 |
| Considerate Care Limited | Health & social care | 2003 |
| Constellation Healthcare Limited | Health & social care | 2022 |
| Construction (Design and Management) Services Limited | Administrative & support | 1990 |
| Construction Alliance Recruitment Limited | Health & social care | 2005 |
| Consulting People Limited | Professional & scientific | 1996 |
| Consumer Unit Television Limited | Information & communication | 1983 |
| Contact Electrical Wholesale Limited | Administrative & support | 2005 |
| Contain IT Limited | Transport & logistics | 2007 |
| Contech Construction Limited | Construction | 1992 |
| Contemporary Brands Limited | Wholesale & retail | 2020 |
| Continuous Process Solutions NO 2 Limited | Professional & scientific | 2016 |
| Contract Lifting Services Limited | Extraterritorial | 2025 |
| Conwin Catering Ltd | Hospitality | 2019 |
| Coombeswood Canal Company Limited | Wholesale & retail | 1990 |
| Coombeswood Canal Trust | Transport & logistics | 2001 |
| Cooper Turner Property Solutions Limited | Real estate | 2024 |
| Copywise Ltd | Wholesale & retail | 2011 |
| Corbett Marquee Services Limited | Administrative & support | 2019 |
| Cordless Cord Limited | Wholesale & retail | 2025 |
| Corlido UK Limited | Professional & scientific | 2024 |
| Cornbow Properties Limited | Construction | 1950 |
| Cosedicasa Private Ltd | Wholesale & retail | 2021 |
| Cosy Nest Homes UK Ltd | Real estate | 2024 |
| Counted Recruitment Ltd | Administrative & support | 2018 |
| County Marquees (Midlands) Limited | Administrative & support | 2022 |