| CCI Delivery Ltd | Transport & logistics | 2019 |
| CCM Research Limited | Extraterritorial | 2018 |
| CCM Technologies Limited | Professional & scientific | 2011 |
| CCM X Limited | Extraterritorial | 2017 |
| CCS Consulting & Advisory Service Ltd | Professional & scientific | 2022 |
| CD Telco Limited | Information & communication | 2014 |
| CDB Residential Ltd | Real estate | 2024 |
| CDI Investment Limited | Construction | 2021 |
| CDJ Aviation Ltd | Transport & logistics | 2024 |
| CDV Consulting Limited | Professional & scientific | 2017 |
| CEB Mans LLP | | 2023 |
| CEC Marketing Services Ltd | Professional & scientific | 2015 |
| Cecure Intelligence Limited | Information & communication | 2019 |
| Cedars Contract Cleaning Ltd | Administrative & support | 2018 |
| Cedarwood Enterprises Ltd | Extraterritorial | 2018 |
| Cede Consulting Limited | Information & communication | 2018 |
| Cedrus Capital Ltd | Financial services | 2021 |
| Ceesay Limited | Health & social care | 2017 |
| CEH Enterprises Limited | Professional & scientific | 2015 |
| Celsius Economics Ltd | Information & communication | 2010 |
| Celtic Willow Limited | Hospitality | 2021 |
| Celtronics Limited | Professional & scientific | 1973 |
| Cely Prosperity Company Limited | Health & social care | 2011 |
| Cementd Ltd | Administrative & support | 2021 |
| Centaur Strip & Blast Services Limited | Manufacturing | 2013 |
| Centimany Limited | Professional & scientific | 2008 |
| Centra Heating Plumbing & Drainage Ltd | Construction | 2025 |
| Centre CAB Rentals Ltd | Administrative & support | 2025 |
| Cerney Garage Ltd | Wholesale & retail | 2015 |
| Cerney Holdings Ltd | Real estate | 2019 |
| Certad Ltd | Administrative & support | 2016 |
| Certaris Ltd | Information & communication | 2026 |
| Certhia Consulting Limited | Administrative & support | 2015 |
| Certifiedrepairs Limited | Wholesale & retail | 2025 |
| Certus Cleaning Ltd | Administrative & support | 2013 |
| CET Tyres Ltd | Other services | 2024 |
| Cetel Computing Limited | Information & communication | 2025 |
| Cetronic Power Solutions Limited | Manufacturing | 2002 |
| Ceutica Limited | Manufacturing | 2021 |
| CF Chippy Limited | Hospitality | 2022 |
| CFE Precision Limited | Manufacturing | 2023 |
| CFL (Furniture) Ltd | Other services | 2021 |
| Cfrunza Ltd | Transport & logistics | 2017 |
| CH Project Support Ltd | Professional & scientific | 2012 |
| CH3F STATI0N Ltd | Hospitality | 2020 |
| Chace Recruitment Limited | Administrative & support | 2023 |
| Chain Check Ltd | Professional & scientific | 2026 |
| Chain Vision Consulting Ltd | Information & communication | 2025 |
| Chalau Limited | Wholesale & retail | 2021 |
| Chalkhill Blue Ltd | Professional & scientific | 2015 |
| Chalkhills Swindon Limited | Real estate | 1997 |
| Challen Consultants Ltd | Professional & scientific | 2016 |
| Challis BIM Solutions Limited | Professional & scientific | 2025 |
| Chama Limited Liability Company Ltd | Health & social care | 2019 |
| Chamberlain Close Management Limited | Real estate | 2024 |
| Champion Holdway and Thomson Limited | Professional & scientific | 1986 |
| Champion Star LLP | | 2025 |
| Champions of Small Business Ltd | Administrative & support | 2016 |
| Chandler Roofing (WB) Limited | Construction | 2022 |
| Chandra Kamini Films Ltd. | Wholesale & retail | 2017 |
| Change Dynamics Ltd | Administrative & support | 2014 |
| Change Unlimited Ltd | Professional & scientific | 2025 |
| Changelivesnotoknives Limited | Education | 2023 |
| Changes Hairdressers Limited | Other services | 2019 |
| Changescope Ltd | Professional & scientific | 2019 |
| Changma Ltd | Real estate | 2025 |
| Channel Velocity Limited | Information & communication | 2025 |
| Channelview Consulting Ltd | Information & communication | 2013 |
| Chaordic Solutions Limited | Professional & scientific | 2011 |
| Chaotic Change Limited | Professional & scientific | 2012 |
| Chapel Corner Management Limited | Real estate | 2022 |
| Chappells Estate Agents Ltd | Real estate | 2015 |
| Chapter Eight Traffic Solutions Limited | Construction | 2014 |
| Character Classics Vehicles Limited | Transport & logistics | 2006 |
| Characters Limited | Administrative & support | 2005 |
| Chariadmin Ltd | Other services | 2014 |
| Charisma Blinds UK Limited | Manufacturing | 1998 |
| Charlbury Farm Stables Limited | Arts & recreation | 2026 |
| Charlbury Farms (Hinton) Limited | Agriculture & fishing | 1961 |
| Charles Anthony Investments Limited | Real estate | 2020 |
| Charles Harding Estate Agents Limited | Real estate | 2004 |
| Charles Harding Group Limited | Financial services | 2023 |
| Charles Harding Investments Ltd | Real estate | 2025 |
| Charles Harding Management Limited | Real estate | 2023 |
| Charles Harding Property Ltd | Real estate | 2024 |
| Charles JAQ Ltd | Transport & logistics | 2024 |
| Charles Walton Estimating Limited | Professional & scientific | 2015 |
| Charlie Edwards Ltd | Arts & recreation | 2024 |
| Charlie Langton Limited | Arts & recreation | 2011 |
| Charlie Papa Sierra Limited | Other services | 2020 |
| Charlie’S Fast Food Co Ltd | Hospitality | 2023 |
| Charlton Court (Gloucester BP) Management Limited | Real estate | 2007 |
| Charm Exclusive Limited | Wholesale & retail | 2014 |
| Charminster Close Freehold Ltd | Households | 2016 |
| Charmogen Ltd | Information & communication | 2011 |
| Charnwood Court Ltd | Real estate | 2017 |
| Chase My Snail Limited | Information & communication | 2008 |
| Chase Your Dream Parties & Events Ltd | Administrative & support | 2022 |
| Chaston Holdings Ltd | Financial services | 2025 |
| Chatterton Fencing Ltd | Construction | 2016 |