| Cdata Limited | Information & communication | 2023 |
| CDF Homes Limited | Real estate | 2013 |
| CDI Trans Ltd | Transport & logistics | 2024 |
| CDM Automotive Ltd | Wholesale & retail | 2021 |
| CDM Logistics Ltd | Transport & logistics | 2024 |
| CDU Digital Ltd | Information & communication | 2013 |
| Cedar Dental Care II Limited | Health & social care | 2021 |
| Ceeq Design Ltd | Manufacturing | 2020 |
| Celisac Ltd | Information & communication | 2025 |
| CEM Leisure Limited | Professional & scientific | 2018 |
| CEM Organisation Limited | Administrative & support | 2012 |
| Centerprise International Limited | Manufacturing | 1983 |
| Centerprise Intl Holdings Limited | Manufacturing | 2010 |
| Centillion Surfaces Limited | Construction | 2007 |
| Central Moving Solutions Ltd | Administrative & support | 2024 |
| Centralsquare Market Ltd | Wholesale & retail | 2024 |
| Centre of Dental Excellence Ltd | Health & social care | 2012 |
| Centrex Consultants Ltd | Wholesale & retail | 2013 |
| Centring Global Trade Ltd | Wholesale & retail | 2022 |
| Centurion Decorating Limited | Construction | 2016 |
| Certo Software Limited | Information & communication | 2016 |
| CET Inc. Limited | Professional & scientific | 2020 |
| Cevv Ltd | Construction | 2024 |
| CF Belle Beau Limited | Other services | 2022 |
| CF Flash Ltd | Professional & scientific | 2016 |
| CFG Capital Limited | Real estate | 2024 |
| CG Brickwork Ltd. | Construction | 2018 |
| Chace Associates Ltd | Information & communication | 2010 |
| Chaiidhaba Limited | Hospitality | 2019 |
| Chaitali's Kitchen Ltd | Hospitality | 2023 |
| Chambers Tree Management Limited | Agriculture & fishing | 2022 |
| Chamling Properties Ltd | Real estate | 2025 |
| Champion Build Limited | Construction | 2007 |
| Champion Homes Limited | Construction | 1983 |
| Chandelle Travel Limited | Administrative & support | 2006 |
| Chandler Project Management Limited | Construction | 2026 |
| Chandlerhp LLP | | 2016 |
| Channel Comms Ltd | Information & communication | 1999 |
| Channel Communication Services Ltd | Information & communication | 1999 |
| Channel Edge Ltd | Information & communication | 2019 |
| Channel IP Limited | Information & communication | 2008 |
| Channel Play Limited | Information & communication | 2019 |
| Channel Toy (UK) Limited | Wholesale & retail | 1992 |
| Chanvan Publishing Limited | Wholesale & retail | 2019 |
| Chapel Court (Basingstoke) Management Limited | Professional & scientific | 2010 |
| Chapel Lodge Care Limited | Health & social care | 2010 |
| Chapter Stay Ltd | Real estate | 2019 |
| Charan IT Services Limited | Information & communication | 2012 |
| Chariots London Limited | Wholesale & retail | 2009 |
| Charis Training and Practice Ltd | Professional & scientific | 2009 |
| Charkat Project Management Limited | Information & communication | 2004 |
| Charlie Bubear Ltd | Professional & scientific | 2022 |
| Charlie Creak Media Ltd | Information & communication | 2025 |
| Charlie Howes Services Ltd | Construction | 2023 |
| Charlotte Mcdonald Sports Massage Limited | Other services | 2019 |
| Charlottes House Limited | Wholesale & retail | 1997 |
| Charlton Grace Limited | Real estate | 2004 |
| Charsley & Warren Limited | Construction | 2000 |
| Charterhouse Inventory Ltd. | Other services | 2013 |
| Chas. a. Blatchford & Sons Holdings Limited | Financial services | 2017 |
| Chase Armitage Ltd | Arts & recreation | 2011 |
| Chase Buchanan UK USA Ltd | Financial services | 2023 |
| Chatha Oakmont Ltd | Real estate | 2024 |
| Chatstar Ltd | Health & social care | 2025 |
| Cheam Consulting Ltd | Professional & scientific | 2011 |
| Cheap Street 42 Ltd | Hospitality | 2025 |
| Cheddar Ltd | Professional & scientific | 2021 |
| Cheli KO Choli Limited | Wholesale & retail | 2025 |
| Chelsea Cabins Limited | Wholesale & retail | 2025 |
| Chemrecruit Limited | Administrative & support | 2014 |
| Chennai Express Limited | Hospitality | 2018 |
| Chequers Estate Agents (Basingstoke) Ltd | Real estate | 2014 |
| CHEQUERS4SCAFFOLDING Ltd | Construction | 2016 |
| Chequp Limited | Extraterritorial | 2022 |
| Cherry Lofts Designs Ltd | Construction | 2024 |
| Cherry Roofline & Cladding Ltd | Construction | 2024 |
| Cherry Rose Investments Limited | Administrative & support | 2011 |
| Chester & Co Estates Ltd | Real estate | 2025 |
| Chester Barrett Limited | Information & communication | 2021 |
| Chestnut Lodge Farm Limited | Administrative & support | 2006 |
| Chestonellie Services Limited | Administrative & support | 2020 |
| Chialton & Co Ltd | Information & communication | 2019 |
| Chic MEX Kebab Limited | Hospitality | 2020 |
| Chicasi Limited | Health & social care | 2014 |
| Chicca Time Limited | Wholesale & retail | 2026 |
| Child Focused Solutions Ltd | Health & social care | 2021 |
| Child Law Partnership Ltd | Professional & scientific | 2005 |
| Child Rehab Ltd | Health & social care | 2010 |
| Chillistick Ltd | Manufacturing | 2011 |
| Chilton Marlowe Ltd | Professional & scientific | 2025 |
| Chineham Consulting Limited | Financial services | 2009 |
| Chinnylyn Limited | Real estate | 2025 |
| Chipsolver.Ai Ltd | Wholesale & retail | 2025 |
| Chiro Development Ltd | Health & social care | 2005 |
| Chirum Ltd | Health & social care | 2014 |
| Chisa Health Care Limited | Health & social care | 2014 |
| Chiswell & Co Ltd | Real estate | 2012 |
| Chloelouisebeauty Ltd | Wholesale & retail | 2024 |
| Chobe Investments UK Limited | Real estate | 2025 |
| Choccabox Limited | Manufacturing | 2019 |