| Cake Inn Redditch Ltd | Wholesale & retail | 2026 |
| Calam Communications Ltd | Professional & scientific | 2015 |
| Calidior Ltd | Wholesale & retail | 2022 |
| Call Line Limited | Transport & logistics | 2011 |
| Callan’S Children Complex Care Company Limited | Public administration | 2025 |
| Callender Bentley Living Limited | Households | 2025 |
| Calvert Software Solutions Limited | Information & communication | 2025 |
| Calyn Consultancy Ltd | Professional & scientific | 2017 |
| CAM Speed Limited | Manufacturing | 2005 |
| Cam's Kitchen at the Arches Ltd | Hospitality | 2025 |
| Camatrix Ltd | Information & communication | 2025 |
| Cambio Support Services Ltd | Construction | 2018 |
| Cambridge Market Intelligence Limited | Information & communication | 1992 |
| Camelot Knight Property Management Ltd | Real estate | 2021 |
| Camiant Limited | Other services | 2017 |
| Camilla Simons Ltd | Professional & scientific | 2017 |
| Camirus Limited | Professional & scientific | 2018 |
| Campbell Norman Ltd | Professional & scientific | 2013 |
| Campden Road Developments Limited | Construction | 2020 |
| Campfires and Stars Limited | Hospitality | 2015 |
| Campion Academy Trust | Education | 2011 |
| Campion Terrace Management Company Limited | Real estate | 2004 |
| Cana Import Limited | Wholesale & retail | 2004 |
| Cancilla Construction Limited | Construction | 2020 |
| Cancilla Holdings Limited | Financial services | 2024 |
| Cancilla Properties Limited | Real estate | 2017 |
| Candansk Ltd | Professional & scientific | 2021 |
| Candy Plug Limited | Wholesale & retail | 2021 |
| Canix Canine Sports Ltd | Arts & recreation | 2018 |
| Canvas Belles Ltd | Administrative & support | 2019 |
| Cape Byron Services Ltd | Professional & scientific | 2018 |
| Cape Road Management Company Limited | Real estate | 2006 |
| CAPE2CAPE Recruitment Limited | Administrative & support | 2023 |
| Capelli-Blaze Limited | Real estate | 1998 |
| Caper Financial Ltd | Professional & scientific | 2025 |
| Capo Consulting Ltd | Professional & scientific | 2015 |
| Captain Valet Ltd | Administrative & support | 2022 |
| Capture Point Limited | Administrative & support | 2008 |
| Car Storage Warwickshire Limited | Transport & logistics | 2022 |
| Car Van Finance Limited | Wholesale & retail | 2002 |
| Carbon Bidco Limited | Financial services | 2020 |
| Carbon Positive Motorsport Ltd | Other services | 2020 |
| Carbon Topco Limited | Financial services | 2020 |
| Carbon Woodcraft Limited | Manufacturing | 2022 |
| Care Supply Hub Ltd | Wholesale & retail | 2023 |
| Care Wave Ltd | Health & social care | 2025 |
| Carline Design Solution Limited | Professional & scientific | 2016 |
| Carlisle Electrical Contractors Ltd | Construction | 2026 |
| Carlo Giorgio Ltd | Wholesale & retail | 2018 |
| Carman Fisher Property Ltd | Real estate | 2021 |
| Carmen Walker Ltd | Other services | 2023 |
| Carolina Leal Hearing Solutions Ltd | Health & social care | 2026 |
| Carpentryee Ltd | Construction | 2024 |
| Carrier Pigeon Enterprises Limited | Financial services | 2020 |
| Carrington Development Advisory Ltd | Professional & scientific | 2026 |
| Carsington Homes Ltd | Construction | 2018 |
| Carsington Pro Ltd | Professional & scientific | 2018 |
| Carsington Properties Ltd | Real estate | 2020 |
| Carter & King Holdings Limited | Real estate | 2021 |
| Carve Limited | Professional & scientific | 2017 |
| CAS 7 Solutions Limited | Real estate | 2016 |
| Casa Care Limited | Health & social care | 2006 |
| Casa ZEN Ltd | Real estate | 2025 |
| Casad Properties Limited | Real estate | 2022 |
| Cash's Apparel Solutions (UK) Limited | Manufacturing | 2013 |
| Casha Ltd | Wholesale & retail | 2009 |
| Cassidy Group (AG) Investments Ltd | Construction | 2019 |
| Cassidy Group (Allesley) Limited | Construction | 2019 |
| Cassidy Group (Arkwright Street) Limited | Construction | 2019 |
| Cassidy Group (Beeston) Ltd | Construction | 2020 |
| Cassidy Group (Bradford) Ltd | Construction | 2018 |
| Cassidy Group (Bristol Street) Ltd | Construction | 2019 |
| Cassidy Group (Holding Co) Ltd | Construction | 2025 |
| Cassidy Group (Holwell Road) Limited | Construction | 2025 |
| Cassidy Group (Hoyle Street) Ltd | Construction | 2018 |
| Cassidy Group (Jubilee Campus) Limited | Construction | 2022 |
| Cassidy Group (London Road) Ltd | Construction | 2018 |
| Cassidy Group (Residential) Limited | Construction | 2012 |
| Cassidy Group (Rugby) Ltd | Construction | 2019 |
| Cassidy Group (ST Chads) Ltd | Construction | 2022 |
| Cassidy Group (Triumph Road) Limited | Construction | 2020 |
| Cassidy Group (UK) Limited | Construction | 2010 |
| Cassidy Group (Wolverhampton) Ltd | Construction | 2018 |
| Cassidy Group Build UP (Endwell Road) Ltd | Real estate | 2025 |
| Cassidy Group Housing Ltd | Construction | 2026 |
| Cassidy Group Investments Ltd | Construction | 2016 |
| Cassidy Group Land and Home Ltd | Construction | 2026 |
| Cassidy Group Management Ltd | Professional & scientific | 2022 |
| Cassidy Group Propco 1 Ltd | Financial services | 2022 |
| Cassidy Group Propco 2 Ltd | Financial services | 2022 |
| Cassidy Group Property Ltd | Construction | 2016 |
| Cassidy Group Strategic Land Ltd | Construction | 2025 |
| Cassidy Homes (Bury) Ltd | Construction | 2026 |
| Cassidy Homes (Earlsdon) Limited | Construction | 2017 |
| Cassidy Homes (Thurlaston) Ltd | Construction | 2025 |
| Cassidy Homes (Wolston) Ltd | Construction | 2025 |
| Cassidy Homes Limited | Construction | 2025 |
| Cassidy Housing Ltd | Construction | 2026 |
| Cassidy Land and Home Ltd | Construction | 2026 |
| Cassidy Rural Homes Limited | Construction | 2015 |