| Cherubic Holdings Limited | Real estate | 2024 |
| Cherubim Day Nursery Ltd | Education | 2023 |
| Cheshunt Developments Ltd | Construction | 2014 |
| Chessington Engineering Ltd | Administrative & support | 2014 |
| Chester Road (Walton) Management Limited | Households | 2015 |
| Chestnut Fields Woking Residents Management Company Limited | Households | 2024 |
| Chestnut Grange (Felbridge) Management Company Limited | Households | 2021 |
| Chestnut Paving Limited | Construction | 2022 |
| Cheston Management Limited | Households | 2009 |
| Cheval House Limited | Households | 2011 |
| Cheyne Court Residents Association Ltd | Households | 1995 |
| Chez Nous Ltd | Real estate | 2025 |
| Chi-Ify Care Company Limited | Health & social care | 2022 |
| Chicago Pizza and Kebabs Burgers Ltd | Hospitality | 2018 |
| Chicago's Selsdon Ltd | Hospitality | 2019 |
| Chichester Court (Grafham) Limited | Households | 1978 |
| Chick Star Ltd | Hospitality | 2025 |
| Chicken Corner Limited | Hospitality | 2024 |
| Chicken Cottage (Distributions) Limited | Administrative & support | 2006 |
| Chicken Cottage Global Ltd | Hospitality | 2020 |
| Chicken Cottage Holdings Limited | Financial services | 2019 |
| Chicken Cottage IP Limited | Administrative & support | 2020 |
| Chicken Cottage Limited | Administrative & support | 2002 |
| Chicken Cottage Stores Limited | Hospitality | 2021 |
| Chicken Delight Limited | Hospitality | 2019 |
| Chicken Guys Ltd | Wholesale & retail | 2022 |
| Chicken Valley High Street Croydon Ltd | Hospitality | 2023 |
| Chickenco Ltd | Wholesale & retail | 2025 |
| Chicking London Ltd | Hospitality | 2024 |
| Chidinma-Chidozie Anyiam | Extraterritorial | 2024 |
| Chidzik Limited | Information & communication | 2017 |
| Chieveley Estates Limited | Real estate | 2023 |
| Chiga Holdings Limited | Financial services | 2025 |
| Child Rescue Nepal Limited | Extraterritorial | 2012 |
| CHILD1ST Consultancy Limited | Education | 2013 |
| Childcare Happy Days Limited | Health & social care | 2015 |
| Children and Young Adults Development Services CIC | Health & social care | 2024 |
| Children and Young Adults Support Services Ltd | Health & social care | 2025 |
| Children R US Ltd | Health & social care | 2011 |
| Chilforce Ltd | Professional & scientific | 2013 |
| Chilli Chaska Limited | Hospitality | 2023 |
| Chillspace UK LLP | | 2007 |
| Chilly in the Shade Ltd | Other services | 2013 |
| Chiltern Bradshaw Ltd | Administrative & support | 2021 |
| Chiltern Place Residents Management Company Limited | Households | 2014 |
| Chilterns Edge (Pitstone) Residents Management Company Limited | Households | 2016 |
| Chimera (UK) Limited | Other services | 2011 |
| Chimera Bakery Ltd | Manufacturing | 2025 |
| Chimneys Court Management Limited | Households | 1989 |
| China Golden Palace Ltd | Hospitality | 2024 |
| China Red Take Away Ltd | Hospitality | 2018 |
| China WOK 88 Ltd | Hospitality | 2025 |
| Chinaes | Education | 2016 |
| Chinbas Services Ltd | Health & social care | 2022 |
| Chincol Production UK Ltd | Information & communication | 2015 |
| Chinese Ltd | Information & communication | 2023 |
| Chinman Enterprises Limited | Wholesale & retail | 1998 |
| Chinov Ltd | Construction | 2017 |
| Chintamani Software Solutions Limited | Information & communication | 2014 |
| Chinwag Business Development & Marketing Ltd | Other services | 2018 |
| Chiofalo Construction Limited | Real estate | 2021 |
| Chipping Lodge (Romford) Management Company Limited | Households | 2002 |
| Chiron Consultants Ltd | Education | 2015 |
| Chiswick Property Investors Limited | Real estate | 2016 |
| Chivastrans Ltd | Wholesale & retail | 2018 |
| Chi’S Quiet Corner Ltd | Real estate | 2025 |
| Chocolate Brownies (Southern) Limited | Hospitality | 2016 |
| Chogikon Limited | Health & social care | 2019 |
| Choice Brands (UK) Limited | Wholesale & retail | 2006 |
| Choice Hair Place Limited | Information & communication | 2025 |
| Chola Group Ltd | Wholesale & retail | 2025 |
| Cholaz Ltd | Professional & scientific | 2014 |
| Chong Family Global Ltd | Wholesale & retail | 2019 |
| Choose to USE Ltd | Wholesale & retail | 2025 |
| CHOOSE2MOVE Ltd | Real estate | 2024 |
| Choosered Ltd | Information & communication | 2018 |
| Chopper Investments Limited | Real estate | 2021 |
| Chorlton Fold (Eccles) Management Company Limited | Households | 2008 |
| Chorus Gardens Management Company Limited | Households | 2014 |
| Choudhary & Sons Transport Ltd | Transport & logistics | 2021 |
| Choudhury Food Group Limited | Hospitality | 2025 |
| Choudhury Group Ltd | Real estate | 2024 |
| Chris K Electrical Ltd | Administrative & support | 2014 |
| Chris Patch Nutrition & Training LAB Ltd | Arts & recreation | 2020 |
| Chriselli Retail Limited | Wholesale & retail | 2006 |
| Chrisliz Associates Ltd | Information & communication | 1995 |
| Chriss Building Ltd | Construction | 2013 |
| Christ the King Residential Care Homes Limited | Health & social care | 2005 |
| Christchurch House SW2 Limited | Households | 1997 |
| Christchurch Management Company Limited | Households | 1997 |
| Christelle Jewellery Ltd | Wholesale & retail | 2025 |
| Christian Leaders Community Ltd | Other services | 2024 |
| Christie Movie Limited | Information & communication | 2014 |
| Christopher Court Management Limited | Households | 1987 |
| Christopher James Carson Limited | Information & communication | 2024 |
| Chriswills Ltd | Health & social care | 2025 |
| Chroma Capital Ltd | Financial services | 2026 |
| Chroma Investments Ltd | Real estate | 2023 |
| Chrysalis Property Management Ltd | Construction | 2005 |
| Chunkybuzz Ltd | Wholesale & retail | 2018 |