| Cafe-Spa Limited | Wholesale & retail | 2013 |
| Caffreys Holdings Limited | Financial services | 2017 |
| Cali Raya Revell Ltd | Extraterritorial | 2025 |
| Calico Property Developments Limited | Construction | 2014 |
| Calver Mill Management Company Limited | Households | 2000 |
| Cambrai Ltd | Administrative & support | 2022 |
| Cambrian Concepts Ltd | Hospitality | 2005 |
| Camchanan Ltd | Information & communication | 2023 |
| Can-Land Music Limited | Information & communication | 2021 |
| Candid OWL Limited | Manufacturing | 2020 |
| Caphane Properties Limited | Real estate | 2015 |
| Capital Compactors Limited | Manufacturing | 2000 |
| Capital Specialist Solutions Ltd | Construction | 2013 |
| Capitan Gate Company Limited | Professional & scientific | 2021 |
| Capitan Group Limited | Manufacturing | 2019 |
| Car Hypermarkets Limited | Wholesale & retail | 2000 |
| Cardentity Ltd | Wholesale & retail | 2000 |
| Care 1775 Limited | Administrative & support | 2021 |
| Carl MAN Ltd | Arts & recreation | 2026 |
| Carpe Diem SB Limited | Real estate | 2017 |
| Carpe Diem Systems Limited | Information & communication | 1996 |
| Carpet Care Midlands Limited | Administrative & support | 2015 |
| Carriage Co. (Droitwich) Limited | Wholesale & retail | 2001 |
| Carryfair Limited | Extraterritorial | 1997 |
| Carthago Tax Limited | Administrative & support | 2017 |
| Carwis Consulting Ltd | Health & social care | 2018 |
| Casa MK Ltd | Real estate | 2025 |
| Castillo Investments Ltd | Financial services | 2019 |
| Catch a Falling Star Limited | Administrative & support | 2016 |
| Catford Consultancy Ltd | Professional & scientific | 2023 |
| CB Properties (Management) Limited | Real estate | 1997 |
| CC Cuisine Limited | Hospitality | 2023 |
| Ccfb Ltd | Arts & recreation | 2023 |
| CDS Care Homes Ltd | Health & social care | 2026 |
| CED Electrical Contracts Ltd | Construction | 2017 |
| Central Safety Limited | Real estate | 1982 |
| Century Commercial Lighting Limited | Administrative & support | 2009 |
| Century Commercial Property Limited | Administrative & support | 2014 |
| Century Lighting Holdings Limited | Administrative & support | 2010 |
| Century Lighting Ltd | Manufacturing | 2001 |
| Century Property Holdings (Midlands) Limited | Administrative & support | 2014 |
| Century Residential Property Limited | Administrative & support | 2014 |
| Cepha Controls Limited | Manufacturing | 1996 |
| Certus (UK) Associates Holdings Limited | Professional & scientific | 2013 |
| CF Alloys Ltd | Financial services | 2024 |
| CH Convenience Limited | Wholesale & retail | 2019 |
| CH Kitchens and Bedrooms Ltd | Construction | 2022 |
| Chai Utilities Limited | Wholesale & retail | 2000 |
| Chalford Cakes LLP | | 2022 |
| Chamberlaine Properties Ltd | Construction | 2013 |
| Chambers Construction Limited | Construction | 2014 |
| Chambers Premier Developments Limited | Real estate | 2018 |
| Chamomile Cottage Ltd | Hospitality | 2024 |
| Champo Ventures Limited | Professional & scientific | 2024 |
| Chankraze Ltd | Administrative & support | 2024 |
| Characteristic Limited | Arts & recreation | 2004 |
| Charie Limited | Financial services | 2019 |
| Charles Norman,Limited | Real estate | 1912 |
| Charlister Limited | Administrative & support | 2015 |
| Chase Plumbing & Property Maintenance Ltd | Other services | 2016 |
| Chase Training Solutions Limited | Education | 2021 |
| Chawson Community Barn CIC | Other services | 2025 |
| Chemi-Kal Limited | Extraterritorial | 2018 |
| Cheriton Place Urology Ltd | Health & social care | 2025 |
| Cherox (JW) Precision Engineering Company Limited | Manufacturing | 2006 |
| Chess P H Limited | Financial services | 2015 |
| Chester COX Property Investments Limited | Real estate | 2021 |
| Cheviot Medical Services Ltd | Health & social care | 2025 |
| China Mini Market (Birmingham) Limited | Wholesale & retail | 2014 |
| Chinese Zodiac Limited | Extraterritorial | 2004 |
| CHO TIM Investment Limited | Construction | 2018 |
| Chris Imray Cold Ventures Ltd | Health & social care | 2021 |
| Christopher Charles Properties Limited | Real estate | 2010 |
| Christos Kitsis Ltd | Health & social care | 2018 |
| Chrysalis Performance Limited | Professional & scientific | 2008 |
| Chrysos Prospero Limited | Information & communication | 2014 |
| Churston Court Inn Limited | Hospitality | 2021 |
| Cirrus MSP Limited | Information & communication | 2024 |
| Cirrus VIP Limited | Information & communication | 2024 |
| City Hand Car Wash Limited | Administrative & support | 2010 |
| Cityserve Holdings Limited | Administrative & support | 2021 |
| Cityserve Mechanical Limited | Administrative & support | 2015 |
| Cityserve Projects Limited | Administrative & support | 2022 |
| CJ Environmental Ltd | Agriculture & fishing | 2026 |
| CJW Rentals Limited | Administrative & support | 2019 |
| CKD Holdings Limited | Financial services | 2025 |
| Clarence Park Health Suite Limited | Arts & recreation | 2015 |
| Clarke-Hill Productions Limited | Information & communication | 2003 |
| Clarkson Autoradiators Limited | Wholesale & retail | 1987 |
| Classic and Modern Bikes Limited | Wholesale & retail | 2009 |
| Classic Brit Drama Tours Ltd | Administrative & support | 2015 |
| Classic Developments.Co.Uk Limited | Professional & scientific | 2006 |
| Claw Collective Ltd | Information & communication | 2014 |
| Clear Brew West Midlands South Limited | Administrative & support | 2023 |
| Clear Focus Health Limited | Health & social care | 2026 |
| Clear Guide Ltd | Health & social care | 2014 |
| Clearaway Limited | Water & waste | 2013 |
| Cleario Ltd | Water & waste | 2026 |
| Clearpath Mortgages and Protection Ltd | Financial services | 2025 |
| Clearpath Technology Limited | Information & communication | 2015 |