| CKW Management Services Ltd | Financial services | 2023 |
| Clan Mcneil Properties Ltd | Real estate | 2020 |
| Clark & SON Building & Roofing Limited | Construction | 2002 |
| Clarke OIL (Holdings) Limited | Financial services | 2018 |
| Clarke OIL Limited | Wholesale & retail | 2007 |
| Clarks Motor Solutions Limited | Wholesale & retail | 2014 |
| Class Creative Ltd | Information & communication | 2009 |
| Classic Bike Shop Limited | Wholesale & retail | 2010 |
| Classic Engine Workshop Limited | Wholesale & retail | 2019 |
| Classic Kitchens (Redditch) Limited | Wholesale & retail | 1996 |
| Classic UK Fried Chicken Ltd | Hospitality | 2025 |
| Classroom to Playroom Limited | Other services | 2013 |
| Claujhon Trans Ltd | Transport & logistics | 2019 |
| Claverdon Village Nursery Limited | Education | 2001 |
| Clean Exteriors Limited | Administrative & support | 2022 |
| Clear Car Credit Ltd | Wholesale & retail | 2014 |
| Clear Direction Consulting Ltd | Water & waste | 2025 |
| Clear Trace Training & Solutions Ltd | Administrative & support | 2025 |
| Clearsight MED Tech Limited | Professional & scientific | 2011 |
| Cleartorque Automotive Ltd | Administrative & support | 2026 |
| Clearview Windscreens Ltd | Wholesale & retail | 2011 |
| Clement Cleaning Chemicals Ltd | Wholesale & retail | 2025 |
| Clements & Co Roofing Limited | Construction | 2018 |
| Clever Brick Property Limited | Real estate | 2025 |
| Clever Energy (Midlands) Limited | Construction | 2023 |
| Clews Investments Ltd | Real estate | 2019 |
| CLICK-2-ORDER Ltd | Wholesale & retail | 2009 |
| Clifford Springs Limited | Manufacturing | 2010 |
| Climate 22 Air Conditioning Limited | Construction | 2007 |
| Climatically Advanced Vehicle Engineering Limited | Professional & scientific | 2009 |
| Clintos Exhibitions Ltd | Real estate | 2025 |
| Clive Campion & SON (Redditch) Ltd | Construction | 2023 |
| Clive Campion & SON Limited | Construction | 2017 |
| Cloud Chaser Collective Ltd | Wholesale & retail | 2025 |
| Clout Model Management Ltd | Other services | 2020 |
| Club Kayaks Limited | Professional & scientific | 2010 |
| Clubbish Limited | Wholesale & retail | 2018 |
| Clubwell Ltd | Wholesale & retail | 2017 |
| Cluer HR Solutions Limited | Professional & scientific | 2011 |
| Clyde House Management Company Limited | Extraterritorial | 1996 |
| CMK Recruitment Ltd | Information & communication | 2024 |
| CMS Auto Services (Midlands) Limited | Wholesale & retail | 2011 |
| Cmvk Properties Limited | Real estate | 2022 |
| CN Homes Ltd | Real estate | 2022 |
| Coachedbyashlee Ltd | Arts & recreation | 2023 |
| Coats Consultancy Limited | Professional & scientific | 2023 |
| Coats Recruitment Limited | Administrative & support | 2023 |
| Cobra Compressed Air Limited | Manufacturing | 2010 |
| Cobra Elite Fitness Ltd | Wholesale & retail | 2024 |
| Cobra Replica Club UK Limited | Other services | 1998 |
| Coco and Knots Limited | Administrative & support | 2016 |
| Cocos Canine Spa Ltd | Other services | 2025 |
| Codie Flooring Specialists Limited | Construction | 2023 |
| Coffeemotive Ltd | Hospitality | 2014 |
| Cognalign Consultancy & Training Ltd | Professional & scientific | 2025 |
| Cold Cuts Music Limited | Information & communication | 2022 |
| Coleman Comms Limited | Information & communication | 2020 |
| Collingwood Rigby LLP | | 2009 |
| Colmore AA Holdings Limited | Financial services | 2021 |
| Colmore AS Holdings Limited | Financial services | 2021 |
| Colmore IB Holdings Ltd | Financial services | 2020 |
| Colmore Insurance Brokers Ltd | Financial services | 2014 |
| Colosseum K9 Ltd | Administrative & support | 2018 |
| Colossus Engineering Ltd | Professional & scientific | 2026 |
| Colour Correction Limited | Wholesale & retail | 2020 |
| Colourful Life Foundation | Professional & scientific | 2011 |
| Coltech Systems Ltd | Professional & scientific | 2015 |
| Combat Pilot Ltd | Extraterritorial | 2014 |
| Comfort Stud Landscaping Projects Ltd | Administrative & support | 2018 |
| Commander Technologies Limited | Information & communication | 2026 |
| Commercial Fleet Services Ltd | Wholesale & retail | 2026 |
| Commercial Logic Ltd | Professional & scientific | 2026 |
| Communitev Charging Limited | Construction | 2025 |
| Community Diabetes & Wellness CIC | Health & social care | 2025 |
| Commxl Limited | Information & communication | 2021 |
| COMPAS75 Limited | Transport & logistics | 2015 |
| Compass Financial Services Ltd | Financial services | 2020 |
| Compass Rose Cars Ltd | Wholesale & retail | 2022 |
| Complete Cladding Solutions Ltd | Construction | 2019 |
| Complete Heating Bathroom & Tile Ltd | Extraterritorial | 2015 |
| Complete Parts Limited | Extraterritorial | 1985 |
| Complete Plastics Limited | Extraterritorial | 2002 |
| Complygate Limited | Information & communication | 2018 |
| Compound Collective Ltd | Health & social care | 2024 |
| Compressed Air Energy Solutions Ltd | Manufacturing | 2024 |
| Compressed Air Engineering (Redditch) Ltd | Manufacturing | 2010 |
| Compression Limited | Administrative & support | 2011 |
| Compton Road Limited | Construction | 2020 |
| Concentric Argentina Limited | Manufacturing | 2014 |
| Concentric Engineering Limited | Extraterritorial | 1956 |
| Concentric Overseas Limited | Financial services | 1976 |
| Concentric Pumps Limited | Manufacturing | 1999 |
| Concentric Tipton Limited | Extraterritorial | 1997 |
| Concentric US Finance 2 Limited | Financial services | 2013 |
| Concentric VFP Limited | Extraterritorial | 2005 |
| Concrete Floor Products Limited | Manufacturing | 2018 |
| Concrete Grind and Polish Ltd | Construction | 2025 |
| Conditioned Air Projects Limited | Construction | 2005 |
| Confidence Wills Franchise Limited | Professional & scientific | 2020 |
| Connecta Systems Limited | Construction | 2002 |