| Castle Gate Park Management Company Limited | Professional & scientific | 1999 |
| Castle Hill 127 Ltd | Wholesale & retail | 2009 |
| Castle Home Solutions (Dudley ) Ltd | Other services | 2025 |
| Castle Meadows Developments Ltd | Real estate | 2025 |
| Castle Piza Ltd | Hospitality | 2025 |
| Castle Polishing & Chrome Plating Limited | Manufacturing | 2002 |
| Castle Resin Floors Limited | Construction | 2020 |
| Castle Security Systems & Networking Ltd | Administrative & support | 2015 |
| Castle Solicitors Limited | Professional & scientific | 2016 |
| Castle View Sales & Lettings Limited | Real estate | 2026 |
| Castlecroft Heating Plumbing and GAS Services Limited | Construction | 2013 |
| Catbells Day Nurseries Ltd | Education | 2018 |
| Causeway Bay Properties Limited | Real estate | 2021 |
| Causeway Goods Limited | Wholesale & retail | 2020 |
| Cawekach Services Ltd | Administrative & support | 2023 |
| CB Local Ltd | Wholesale & retail | 2024 |
| Cb's Clean Team Limited | Administrative & support | 2024 |
| Ccastle Ltd | Wholesale & retail | 2026 |
| CCG Haven Ltd | Real estate | 2026 |
| CCG IT Services Ltd | Information & communication | 2024 |
| CCG Online Services Limited | Information & communication | 2010 |
| CCL Education Ltd | Education | 2024 |
| CCM Management Ltd | Hospitality | 2023 |
| Ccmj Holdings and Investments Ltd | Financial services | 2025 |
| Ccmj Software Ltd | Information & communication | 2014 |
| CCP (London) Properties Limited | Real estate | 2017 |
| CCS Consulting Services Limited | Professional & scientific | 2023 |
| CDJ Logistics Ltd | Transport & logistics | 2023 |
| Cebron Motors Limited | Professional & scientific | 2008 |
| CED Holdings 2022 Ltd | Financial services | 2022 |
| CED Property Services Ltd | Real estate | 2011 |
| Cedar Mews (Tipton) Management Company Limited | Households | 2002 |
| Celtlight Limited | Construction | 1990 |
| Central Axle Services (Midlands) Limited | Wholesale & retail | 1993 |
| Central Birmingham Imaging Solutions Ltd | Health & social care | 2016 |
| Central BMS Solutions Limited | Construction | 2023 |
| Central Cars Dudley Limited | Transport & logistics | 2023 |
| Central Kindling and Logs Limited | Wholesale & retail | 2025 |
| Central Minds Ltd | Health & social care | 2025 |
| Central Shutters & Doors Limited | Manufacturing | 2006 |
| Centre Storage Ltd | Real estate | 2026 |
| Centricore Solutions Ltd | Information & communication | 2005 |
| Century Recycling Services Limited | Water & waste | 2009 |
| Ceylonia Limited | Hospitality | 2025 |
| CF Consultancy Services Ltd | Professional & scientific | 2016 |
| CFC and Ribs Ltd | Hospitality | 2024 |
| CFH Group Ltd | Financial services | 2019 |
| CFP Composites Limited | Other services | 2007 |
| CG Automation Limited | Professional & scientific | 2018 |
| CG Prop Services Ltd | Construction | 2019 |
| CG Property Ventures Ltd | Real estate | 2026 |
| CGD 1938 Ltd | Real estate | 2025 |
| Cgkp Enterprises Ltd | Wholesale & retail | 2024 |
| CH2 Home Care Limited | Public administration | 2025 |
| Chachas Roti Junction Ltd | Hospitality | 2023 |
| Chadgate Limited | Hospitality | 2017 |
| Challec Ltd | Wholesale & retail | 2015 |
| Challenge Academy CIC | Education | 2016 |
| Challon Investments | Real estate | 2015 |
| Changing Rooms (Dudley) Limited | Wholesale & retail | 2008 |
| Chapel Logistics Ltd | Transport & logistics | 2013 |
| Chapters Associates Ltd | Professional & scientific | 2015 |
| Charlecote 1969 Limited | Extraterritorial | 2015 |
| Charles Advertising Limited | Professional & scientific | 1982 |
| Charles Winston Housing Ltd | Real estate | 2020 |
| Charlesworths Silver Limited | Wholesale & retail | 2013 |
| Chartway Industrial Services Limited | Other services | 1992 |
| Chase Auto Repairs Limited | Wholesale & retail | 2003 |
| Chasegate Holdings Ltd | Financial services | 2023 |
| Chasegate Property Ltd | Real estate | 2023 |
| Chatha Property Investments Limited | Extraterritorial | 2013 |
| CHC Contract & Specialist Cleaning Services Ltd | Administrative & support | 2025 |
| Checketts Properties Limited | Real estate | 2013 |
| Chella Care Ltd | Health & social care | 2023 |
| Chella Homes Limited | Real estate | 2023 |
| Chelsea & Mayfair Limited | Households | 2026 |
| Chemicrest Limited | Wholesale & retail | 1985 |
| Chequers House Ltd | Professional & scientific | 2024 |
| Cherrytree International Limited | Hospitality | 2016 |
| Chestnut Healthcare Limited | Wholesale & retail | 2014 |
| Chez Teteh Grocery Limited | Wholesale & retail | 2026 |
| Chez Teteh Ltd | Wholesale & retail | 2021 |
| Chick a Filla Ltd | Hospitality | 2024 |
| Chik'N'Dip Ltd | Hospitality | 2025 |
| Childcare Activities Ltd | Wholesale & retail | 2025 |
| Chill Cart Ltd | Wholesale & retail | 2025 |
| Chiro Plus Ltd | Health & social care | 2002 |
| Chivward Estates Limited | Real estate | 2016 |
| Choicecare 2000 Limited | Health & social care | 1998 |
| Choleigh Larrissa Limited | Administrative & support | 2024 |
| Chowkhal 7 Ltd | Construction | 2024 |
| Chris Owen Properties Ltd | Real estate | 2026 |
| Chris Peacock Gardens Ltd | Other services | 2016 |
| Chris Plant Utilities Ltd | Energy | 2019 |
| Chris Roberts Video Production and Training Limited | Information & communication | 2015 |
| Chroma Paint & Decor Ltd | Construction | 2024 |
| Chuks Services Ltd | Health & social care | 2020 |
| Chuksng Properties Ltd | Real estate | 2025 |
| Church Food Store Ltd | Wholesale & retail | 2019 |
| Churchill Forest Nursery Limited | Administrative & support | 2004 |