| Cantertech Limited | Other services | 2014 |
| CAP EX Associates Ltd | Professional & scientific | 2025 |
| Capaball Limited | Administrative & support | 2011 |
| Cape (INS) Services Limited | Financial services | 2020 |
| Cape Hill Properties Ltd | Real estate | 2020 |
| Cape Warwick Ltd | Manufacturing | 1991 |
| Cape's Building Services Ltd | Construction | 2022 |
| Capelin Financial Management Limited | Financial services | 2002 |
| Capelin Holdings Ltd | Professional & scientific | 2015 |
| Capelin Limited | Real estate | 2007 |
| Capital Nest Homes Limited | Real estate | 2025 |
| Capital Plumbing Services Ltd | Construction | 2020 |
| Capital Sound Hire Limited | Extraterritorial | 1989 |
| Capital Superhighway Ltd | Financial services | 2013 |
| Capital Wealth Partners Limited | Professional & scientific | 2014 |
| Capp Headwear Ltd | Wholesale & retail | 2025 |
| Capri Newco UK Limited | Manufacturing | 2026 |
| Capricorn Blinds Limited | Manufacturing | 1998 |
| Capricorn Contracts Limited | Extraterritorial | 2010 |
| Capricorn Shading Group Limited | Financial services | 2010 |
| Captain Curtain Ltd | Other services | 2016 |
| Captain K9 Ltd | Other services | 2022 |
| Capture Creation Limited | Administrative & support | 2025 |
| Capz Central Ltd | Manufacturing | 2025 |
| Car Auction Buying Service Limited | Wholesale & retail | 2021 |
| Car Consultants Ltd | Wholesale & retail | 2024 |
| Car Dealer Manager Ltd | Wholesale & retail | 2019 |
| Caramay Limited | Wholesale & retail | 2020 |
| Carbon Neutral Investments Ltd | Financial services | 2022 |
| Cardano Enterprise Ltd | Financial services | 2025 |
| Cardiosport Ltd | Health & social care | 2022 |
| Care Affair Solihull Ltd | Health & social care | 2018 |
| Care Centred Plus Ltd | Education | 2026 |
| Care Certification Scheme Limited | Education | 2025 |
| Care Character Limited | Administrative & support | 2019 |
| Care Compliance Consultancy Limited | Education | 2010 |
| Care Recruitment Solutions Limited | Administrative & support | 2010 |
| Care Scheme Limited | Public administration | 2025 |
| CARE4NOW Ltd | Public administration | 2019 |
| Career Recruitment Moves Ltd | Administrative & support | 2008 |
| Careersix Limited | Information & communication | 2023 |
| Carehub WM Ltd | Real estate | 2026 |
| Carflipco Ltd | Wholesale & retail | 2025 |
| Carl Lawrence Carpentry and Field Solutions Ltd | Manufacturing | 2025 |
| Carla Hull Legal Services Limited | Extraterritorial | 2011 |
| Carla Hull Solicitors Limited | Professional & scientific | 2008 |
| Carleton House (Shirley) Limited | Real estate | 2020 |
| Carleton House (Solihull) LLP | | 2012 |
| Carlin Cleaning Services Ltd | Administrative & support | 2024 |
| Carlington Home Improvements Limited | Construction | 2004 |
| Carlton Associates (2003) Limited | Education | 2003 |
| Carlton Landbank Limited | Professional & scientific | 2005 |
| Carly F Consultancy Ltd | Health & social care | 2022 |
| Carnaby Place C711 Limited | Real estate | 2022 |
| Carnatic Music Circle Limited | Education | 2018 |
| Caroline Bramley Designs Ltd | Professional & scientific | 2016 |
| Caroline Mcgonigle Administration Services Limited | Administrative & support | 2006 |
| Carpenter Communications Limited | Professional & scientific | 2026 |
| Carpet Print Europe Limited | Wholesale & retail | 2015 |
| Carpet Print Ltd | Manufacturing | 2007 |
| Carr & Smith (Builders) Limited | Construction | 1980 |
| Carrington Packaging Limited | Professional & scientific | 1957 |
| Carry Cosy Ltd | Wholesale & retail | 2025 |
| Carsten Astheimer Limited | Professional & scientific | 2009 |
| Carter Daniel Limited | Professional & scientific | 2019 |
| Cartersons Limited | Administrative & support | 2003 |
| Cartmell Recruitment Ltd | Professional & scientific | 2021 |
| Cartovo Ltd | Wholesale & retail | 2023 |
| Carwaze Ltd | Wholesale & retail | 2024 |
| Carworx Solihull Ltd | Other services | 2017 |
| Casa Celva Ltd | Wholesale & retail | 2023 |
| Casa DI Tiles Limited | Wholesale & retail | 2025 |
| Casa Interiors Ltd | Wholesale & retail | 2025 |
| Casa Rube Limited | Real estate | 2021 |
| Casavivant Limited | Other services | 2018 |
| Cascade Computer Consultancy Limited | Information & communication | 1999 |
| Casey & Co Properties Limited | Real estate | 2021 |
| Casey Brothers & SON Limited | Construction | 2020 |
| Cash Kangaroo Limited | Extraterritorial | 2013 |
| Cash Management Services Limited | Professional & scientific | 2013 |
| Cashmere Palette Ltd | Hospitality | 2022 |
| Cashtech Limited | Professional & scientific | 2023 |
| Caspaland Ltd | Professional & scientific | 2022 |
| Caspian Cash&Carry Limited | Wholesale & retail | 2010 |
| Cass Bros' Developments Ltd | Construction | 2022 |
| Cass Bros' Limited | Construction | 2011 |
| Casserley Construction Limited | Construction | 2019 |
| Casserley Services Limited | Professional & scientific | 2018 |
| Cassidy Group (Norris House) LLP | | 2019 |
| Castesuton Ltd | Construction | 2019 |
| Castle Care Dental Practice Limited | Real estate | 2010 |
| Castle Central Limited | Administrative & support | 2017 |
| Castle Driver Training Ltd | Education | 2024 |
| Castle Lane Cafe Limited | Hospitality | 2023 |
| Castle Vale Pharma Ltd | Wholesale & retail | 2022 |
| Castlebourne Homes (Polzeath) Ltd | Construction | 2016 |
| Castlebourne Homes (Rock) Ltd | Construction | 2016 |
| Castlebourne Homes Ltd | Construction | 2015 |
| Catalyst AMC Ltd | Information & communication | 2011 |
| Cataract Solutions Ltd | Health & social care | 2016 |