| Cotswold and Severn Surgical Limited | Health & social care | 2012 |
| Cotswold Barn Ltd | Hospitality | 2022 |
| Cotswolds Automotive Co Limited | Wholesale & retail | 2019 |
| Cotteridge Healthcare Ltd | Real estate | 2022 |
| Cotteridge Trading Ltd | Transport & logistics | 2026 |
| Cotton Brics Limited | Real estate | 2025 |
| Cottonmoon Ltd | Manufacturing | 2022 |
| Cottrill Enterprises Limited | Professional & scientific | 2011 |
| Counselling, Transpersonal and Alternative Practitioners UK Ltd | Health & social care | 2021 |
| Counterflow Limited | Manufacturing | 1989 |
| Counterplas Limited | Manufacturing | 1990 |
| Countrywide Carriers Ltd Ltd | Transport & logistics | 2025 |
| County Air Ambulance Trading Limited | Arts & recreation | 2012 |
| County Air Ambulance Trust | Health & social care | 1995 |
| County Saddlery Limited | Manufacturing | 1994 |
| Courier 4 Sameday Ltd | Transport & logistics | 2024 |
| Courier Events Limited | Other services | 2023 |
| Courier Fast Limited | Transport & logistics | 2025 |
| Courier House U.K. Ltd | Transport & logistics | 2025 |
| Course Connect Ltd | Education | 2019 |
| Courtyard Motors Limited | Extraterritorial | 2014 |
| Covely Ltd | Wholesale & retail | 2017 |
| Coven Trading Limited | Other services | 2022 |
| Covenant of GOD World Outreach Church Ltd | Other services | 2023 |
| Covo Consulting Ltd | Real estate | 2025 |
| COW Home Ltd | Wholesale & retail | 2022 |
| COW Sanctuary and Eco Village Ltd | Other services | 2021 |
| COX and Plant (Projects) Ltd | Manufacturing | 2016 |
| COX and Plant Limited | Manufacturing | 2012 |
| COX and Plant Products Limited | Manufacturing | 1974 |
| Coziness Creations Ltd | Manufacturing | 2026 |
| Cozy Home Developments Limited | Real estate | 2025 |
| Cozynest Housing Ltd | Real estate | 2025 |
| CP Financial Consultancy Ltd | Professional & scientific | 2025 |
| CP Topco 23 Limited | Transport & logistics | 2023 |
| CPC West Midlands Ltd | Education | 2025 |
| CPM Contracting Limited | Construction | 2013 |
| Cpm(Midlands) Limited | Construction | 2017 |
| CPS25 Ltd | Manufacturing | 2025 |
| CPT Properties Limited | Real estate | 2018 |
| CPT Property Limited | Construction | 2018 |
| CQC Pro Limited | Professional & scientific | 2025 |
| CR Cloud Consulting Limited | Information & communication | 2026 |
| Crabb Investments Limited | Real estate | 1955 |
| Crabtree & Co Holdings Limited | Real estate | 2026 |
| Crackhill Consulting Limited | Information & communication | 2019 |
| Craddock Engineering Limited | Manufacturing | 1992 |
| Craddock Holdings Limited | Manufacturing | 2014 |
| Craft Cutz Ltd | Other services | 2026 |
| Crafterchris Ltd | Wholesale & retail | 2024 |
| Craig & Derricott Holdings Limited | Professional & scientific | 2012 |
| Craig & Derricott Limited | Manufacturing | 1944 |
| Craig Projects Limited | Construction | 2016 |
| Crane Scales Limited | Extraterritorial | 2010 |
| Crankedrue Ltd | Wholesale & retail | 2024 |
| Cranmer Court Walsall Freehold Company Limited | Households | 2025 |
| Crarecreut Ltd | Wholesale & retail | 2024 |
| Craspad Ltd | Wholesale & retail | 2024 |
| Cratchtone Ltd | Wholesale & retail | 2024 |
| Cravelton Ltd | Wholesale & retail | 2012 |
| Crazfinmer Ltd | Transport & logistics | 2024 |
| Cream & Browne Lifestyle Limited | Wholesale & retail | 2004 |
| Create a Home Ltd | Construction | 2022 |
| Creating Choice | Health & social care | 2017 |
| Creative Canvas 2024 Ltd | Manufacturing | 2024 |
| Creative Diversity Residential Care Ltd | Health & social care | 2010 |
| Creative Fabrications (Walsall) Limited | Manufacturing | 2023 |
| Creative Generation Ltd | Extraterritorial | 2020 |
| Creative Kitchens & Interiors Ltd | Manufacturing | 2025 |
| Creative Lifts Ltd | Construction | 2018 |
| Creative Mama Media Ltd | Professional & scientific | 2024 |
| Creative Medical Training Limited | Education | 2023 |
| Creative Support Solutions Limited | Hospitality | 2014 |
| Creb Choc Ltd | Hospitality | 2025 |
| Crescent Gate Limited | Administrative & support | 2025 |
| Crescentia Academy Ltd | Professional & scientific | 2020 |
| Crescentia Ltd | Professional & scientific | 2013 |
| Cresco Innovation Ltd | Professional & scientific | 2009 |
| Crestacre Chiropractic Clinic Limited | Health & social care | 2018 |
| Crestage Limited | Real estate | 2016 |
| Crewchurn Ltd | Transport & logistics | 2024 |
| Criativo Limited | Professional & scientific | 2016 |
| Cricket Close LLP | | 2017 |
| Crimblefest Limited | Wholesale & retail | 2020 |
| Crisnik Building Ltd | Construction | 2023 |
| Crispol Interiors Ltd | Construction | 2013 |
| Crispy World Ltd | Hospitality | 2025 |
| Criss Beauty Ltd | Other services | 2020 |
| Crisstar Spedition Ltd | Transport & logistics | 2021 |
| Crisstar Transport Ltd | Transport & logistics | 2025 |
| Critical Analysis Ltd | Information & communication | 2018 |
| CRM Art Ltd | Administrative & support | 2023 |
| Croft Bridles Walsall Ltd | Manufacturing | 2012 |
| Croft News Limited | Information & communication | 2015 |
| Croft Pharmacy Limited | Wholesale & retail | 2025 |
| Croft Residence Ltd | Households | 2023 |
| Croidfloor Ltd | Administrative & support | 2024 |
| Cromwell Truck Rental Limited | Professional & scientific | 1992 |
| Cromwell Truck Sales Limited | Professional & scientific | 1992 |
| Crosby House Limited | Real estate | 2024 |