| Colorbible Limited | Information & communication | 2017 |
| Colour-Pro Powder Coatings Limited | Manufacturing | 2010 |
| Coloursource Limited | Wholesale & retail | 1998 |
| Colton Harper Ltd | Information & communication | 2019 |
| Coltrac Limited | Administrative & support | 2008 |
| Comberton Mansions Limited | Households | 1994 |
| Comcomcon Ltd | Information & communication | 2024 |
| Commercial Case Supplies Limited | Manufacturing | 1965 |
| Commercial Construction Consulting Ltd | Professional & scientific | 2023 |
| Commercial Office Interiors Limited | Construction | 2018 |
| Commercial Vehicle Repairs Ltd | Wholesale & retail | 2012 |
| Community Boost CIC | Health & social care | 2015 |
| Community for Reconciliation | Education | 1986 |
| Compact E.V. Limited | Administrative & support | 2022 |
| Compact Fork Trucks Limited | Administrative & support | 2002 |
| Compact Manufacturing Limited | Manufacturing | 2003 |
| Company of Hong Limited | Arts & recreation | 2021 |
| Compass Cricket Limited | Arts & recreation | 2018 |
| Compass Design Services Ltd | Information & communication | 2023 |
| Competitive Edge Marketing Solutions Limited | Professional & scientific | 2020 |
| Complete Caterers Limited | Hospitality | 2009 |
| Complete Drywall Interiors Ltd | Construction | 2016 |
| Complete Healthcare Solutions (Midlands) Limited | Financial services | 2003 |
| Complete Property Management Limited | Real estate | 2011 |
| Complete Refreshment Solutions Ltd | Wholesale & retail | 1999 |
| Complete Vending Services Limited | Extraterritorial | 1999 |
| Comsafe Safety Consulting (UK) Ltd | Professional & scientific | 2023 |
| Concept Display Systems (South West) Limited | Manufacturing | 1992 |
| Concise Investments Limited | Administrative & support | 1957 |
| Connect Electrical Services (Bromsgrove) Ltd | Construction | 2013 |
| Connected Services Ltd | Construction | 2015 |
| Connolly Builders Limited | Construction | 1993 |
| Conrad Davies Building Services Limited | Construction | 2010 |
| Consilium Commercial Leadership Limited | Professional & scientific | 2015 |
| Constantia Pictures Limited | Arts & recreation | 2015 |
| Contemporary Construction Solutions Limited | Construction | 2025 |
| Contemporary Group Midlands Limited | Construction | 2025 |
| Contemporary Homes (Stoulton) Limited | Construction | 2026 |
| Contemporary Homes Midlands Limited | Construction | 2025 |
| Contemporary Planning Solutions Limited | Construction | 2025 |
| Content Control Ltd | Information & communication | 2025 |
| Contraband Supps Ltd | Manufacturing | 2025 |
| Contract Flooring Solutions Limited | Construction | 2005 |
| Contracy Supply Ltd | Administrative & support | 2019 |
| Controlaccount Ltd | Administrative & support | 1992 |
| Conyak Productions Limited | Arts & recreation | 2022 |
| Cook and Associates Limited | Arts & recreation | 1999 |
| Cool Brilliant Distribution Company Limited | Professional & scientific | 2019 |
| Coolgame (UK) Ltd | Wholesale & retail | 2006 |
| Coombe Beinn Ltd | Professional & scientific | 2025 |
| Coomo UK Limited | Manufacturing | 2021 |
| Coopers Transport Ltd | Transport & logistics | 2019 |
| Copertura Productions Limited | Information & communication | 2022 |
| COR Love Ltd | Information & communication | 2025 |
| Core Assets Children's Services Limited | Extraterritorial | 2012 |
| Core Assets CSR Limited | Extraterritorial | 2009 |
| Core Assets Fostering Limited | Extraterritorial | 2012 |
| Core Financial Services Ltd | Financial services | 2005 |
| Corey Cameron Carl O’Leary Limited | Professional & scientific | 2022 |
| Corinthian Trade Limited | Wholesale & retail | 2026 |
| Cornus Business Services Ltd | Professional & scientific | 2021 |
| Corylus Consultancy Ltd | Information & communication | 2014 |
| Cosiie Limited | Wholesale & retail | 2025 |
| Cosy Stay Holiday Lets Ltd | Real estate | 2025 |
| Cotswold Collectibles Ltd | Wholesale & retail | 2005 |
| Cotteridge Properties Limited | Real estate | 2017 |
| Cottrill Transport Limited | Transport & logistics | 1947 |
| Counties Developments Limited | Real estate | 2000 |
| Counties Property Limited | Real estate | 2019 |
| Counties Residential Limited | Real estate | 2019 |
| Country House Renovations Limited | Construction | 2005 |
| Countryside Sales & Service Limited | Wholesale & retail | 2024 |
| Countryside Units Limited | Administrative & support | 2012 |
| County Safety Services Limited | Administrative & support | 1993 |
| Coupe Developments Ltd | Financial services | 2023 |
| Courtyard Developments (Bromsgrove) Limited | Construction | 2000 |
| Courtyard Management (Bromsgrove) NO 2 Limited | Professional & scientific | 2003 |
| Coversure Midlands Limited | Financial services | 2003 |
| Covertxt Servicing Ltd | Other services | 2019 |
| Covertxt UK Limited | Other services | 2014 |
| Cowl and Flues Installations Ltd | Professional & scientific | 2022 |
| COX Medical Services Limited | Health & social care | 2002 |
| CP & LH Limited | Real estate | 2017 |
| CP Ceilings & Partitions Limited | Administrative & support | 2016 |
| CPH Games UK Limited | Education | 2016 |
| CR Rigging Ltd | Administrative & support | 2015 |
| Craddock Cycles Limited | Manufacturing | 2014 |
| Crafted Homes (Midlands) Ltd | Construction | 2024 |
| Craftykin Limited | Wholesale & retail | 2022 |
| Crane Building & Construction Ltd | Construction | 2021 |
| Crazy Auntie ANN Limited | Information & communication | 2026 |
| Create Blue Limited | Professional & scientific | 2016 |
| Creative Cuts Productions Ltd | Arts & recreation | 2022 |
| Creatix Graphic SD Ltd | Professional & scientific | 2020 |
| Crescent Chancery Management Limited | Real estate | 2001 |
| Crew ME Limited | Administrative & support | 2007 |
| Cripteach Colouration Limited | Information & communication | 2025 |
| Criteria Hub Ltd | Information & communication | 2015 |
| Cronin Wealth Management Ltd | Financial services | 2016 |
| Crossroads Garage (LYE) Ltd | Wholesale & retail | 2020 |