| Chumchak Ltd | Wholesale & retail | 2025 |
| Chung SZE Property Limited | Real estate | 2020 |
| Chung Ying 121 Limited | Hospitality | 2026 |
| Chung Ying Cantonese Restaurant Limited | Hospitality | 1985 |
| Chung Ying Erdington Limited | Hospitality | 2023 |
| Chungs SA2 Limited | Administrative & support | 2018 |
| Chungs Swansea Ltd | Hospitality | 2026 |
| Chunky Chips Limited | Hospitality | 2002 |
| Chunri Outlet Ltd | Wholesale & retail | 2024 |
| Chuoshrix Ltd | Administrative & support | 2021 |
| Church Converts Limited | Real estate | 2025 |
| Church Court (CS Stourbridge) RTM Company Limited | Households | 2020 |
| Church Court (PR Stourbridge) RTM Company Limited | Households | 2020 |
| Church Court TMC Limited | Households | 2023 |
| Church Green Residents Ltd | Professional & scientific | 2024 |
| Church Hill Auto’S Limited | Wholesale & retail | 2022 |
| Church Hill Heritage Ltd | Construction | 2019 |
| Church Meadows (Salford Priors) Management Company Limited | Real estate | 2019 |
| Church of Birmingham Limited | Health & social care | 2023 |
| Church Road Freeholders Limited | Households | 2004 |
| Church Road Moseley Limited | Administrative & support | 2009 |
| Church Road Surgery Ltd | Health & social care | 2026 |
| Church Street (Pensnett) Management Company Limited | Households | 2019 |
| Church Street Chippy Ltd | Hospitality | 2025 |
| Church Street Consultants Ltd | Professional & scientific | 2018 |
| Church Street Practice (Midlands) Ltd | Health & social care | 2018 |
| Church View (Birmingham) Ltd | Construction | 2024 |
| Churchcentral Trust | Other services | 2006 |
| Churchgate Property Group Ltd | Real estate | 2021 |
| Churchgate Property Services Limited | Hospitality | 2007 |
| Churchill Blue Limited | Professional & scientific | 2025 |
| Churchill Business Finance Limited | Financial services | 2000 |
| Churchill Computer Solutions Limited | Information & communication | 1990 |
| Churchill Control Systems Limited | Construction | 1996 |
| Churchill Mews Freehold (NO. 2) Limited | Households | 2022 |
| Churchill North Properties Limited | Real estate | 2022 |
| Churchill Plumbing and Heating (Midlands) Limited | Construction | 2007 |
| Churchills of London Limited | Wholesale & retail | 2021 |
| Churchstoke Homes Ltd | Construction | 2020 |
| Churchstone Developments Limited | Real estate | 2011 |
| Churi Box Ltd | Wholesale & retail | 2025 |
| Churt Solutions Limited | Professional & scientific | 2005 |
| Chusbadidi Limited | Professional & scientific | 2023 |
| Chuskaah Limited | Wholesale & retail | 2023 |
| Chuski Ltd | Hospitality | 2024 |
| CHW Projects Ltd | Real estate | 2026 |
| Chxco Club Limited | Other services | 2021 |
| Chxco Holdings Limited | Financial services | 2021 |
| CHY Trading Limited | Wholesale & retail | 2020 |
| CI Concept Building Ltd | Construction | 2021 |
| CI Earlsdon Ltd | Hospitality | 2020 |
| CI Play Limited | Arts & recreation | 2024 |
| CI4 Consulting Limited | Information & communication | 2016 |
| CIA Estates Ltd | Real estate | 2025 |
| Ciaea International Exchange Ltd | Education | 2024 |
| Ciao Frankie Ltd | Wholesale & retail | 2026 |
| Ciaostar Global Limited | Information & communication | 2021 |
| Ciaro Ltd | Wholesale & retail | 2023 |
| CIB Electrical Services Ltd | Construction | 2014 |
| Cibaria UK Limited | Hospitality | 2024 |
| Ciboldmere Ltd | Hospitality | 2020 |
| CIC One | Financial services | 2019 |
| CIC Two | Financial services | 2019 |
| Cicada Mediterranean Treasures Ltd | Wholesale & retail | 2024 |
| Cicero Group UK Ltd | Education | 2025 |
| Cicione Ltd | Transport & logistics | 2017 |
| CID Digital Services Ltd | Wholesale & retail | 2021 |
| CIE Europe Limited | Administrative & support | 2012 |
| Cieax Limited | Other services | 2025 |
| Ciel Asset Management Limited | Real estate | 2015 |
| Ciel Properties (Asset Management) LLP | | 2015 |
| Ciel Property Holdings Limited | Real estate | 2015 |
| Ciel Store Ltd | Wholesale & retail | 2023 |
| CIF Transport Ltd | Transport & logistics | 2017 |
| Cigar Tech Limited | Manufacturing | 2024 |
| Cigs 4 U Limited | Wholesale & retail | 2015 |
| Cileamington Ltd | Hospitality | 2020 |
| Cilk Group Ltd | Wholesale & retail | 2023 |
| Cima Care (Burton) Ltd | Health & social care | 2019 |
| Cimh Ltd | Health & social care | 2015 |
| Cimi AI Ltd | Information & communication | 2025 |
| Cimme Limited | Information & communication | 2015 |
| Cinch Constructions Ltd | Construction | 2025 |
| Cincinnati Milling Machines Limited | Professional & scientific | 1970 |
| Cincinnato Limited | Construction | 2022 |
| Cinco Brands Ltd | Wholesale & retail | 2018 |
| Cinco Group Ltd | Hospitality | 2026 |
| Cinder Fuel Services Limited | Wholesale & retail | 2017 |
| Cindy Assets Limited | Real estate | 2018 |
| Cindy Hair Limited | Other services | 2026 |
| Cindygear Ltd | Wholesale & retail | 2025 |
| Cine Events Ltd | Information & communication | 2023 |
| Cine Star Ltd | Professional & scientific | 2015 |
| Cinematic Views Ltd | Information & communication | 2024 |
| Cinematic Visuals Ltd | Information & communication | 2025 |
| Cinero Group Ltd | Mining & quarrying | 2026 |
| Cineture Films Limited | Information & communication | 2016 |
| Cineture Limited | Information & communication | 2015 |
| Cinnacare (Midlands) Ltd | Wholesale & retail | 2026 |
| Cinnamon Aitch Limited | Manufacturing | 2002 |