| Centennial Three Limited | Construction | 2025 |
| Centennial Two Limited | Construction | 2025 |
| Center of Pakistani Studes Ltd | Administrative & support | 2025 |
| Centili Limited | Administrative & support | 2012 |
| Central Mall Limited | Real estate | 2021 |
| Centralink Group Ltd | Transport & logistics | 2025 |
| Centre of Management and Development Ltd | Professional & scientific | 2009 |
| Centre Stage Dance and Drama Ltd | Education | 2020 |
| Centremark Contracting Ltd | Construction | 2005 |
| Centrepoint Vitality Ltd | Health & social care | 2026 |
| Centurian Solutions Limited | Information & communication | 2014 |
| Centurion Gold Ltd | Wholesale & retail | 2018 |
| Century Media 360 Limited | Information & communication | 2022 |
| Century Recruitment Ltd | Administrative & support | 2011 |
| Ceramics and Bathrooms Ltd | Wholesale & retail | 2025 |
| Ceramika Services Ltd | Construction | 2023 |
| Ceramix and Bathrooms Ltd | Wholesale & retail | 2025 |
| Ceredata Limited | Information & communication | 2019 |
| Certainity Limited | Information & communication | 2017 |
| Certified Care Services Ltd | Administrative & support | 2020 |
| Certified Law & Arbitration Academy Ltd | Education | 2017 |
| Certified Teachers Academy Ltd | Education | 2024 |
| Ceylon Boutique Ltd | Wholesale & retail | 2024 |
| Ceylon Imperial Ltd | Wholesale & retail | 2026 |
| Cftuk Limited | Transport & logistics | 2024 |
| CG Procurement Ltd | Hospitality | 2024 |
| Cgar 1999 Ltd | Hospitality | 2025 |
| CGH Prima Limited | Real estate | 2017 |
| Cgnk 101 Ltd | Hospitality | 2025 |
| Cgnk 130 Ltd | Hospitality | 2025 |
| CGU Psychiatry Ltd | Health & social care | 2025 |
| CH 92 Ltd | Hospitality | 2024 |
| Ch.C.P Ltd | Transport & logistics | 2018 |
| Chaarstar Limited | Wholesale & retail | 2025 |
| Chademunhu Enterprises Ltd | Professional & scientific | 2019 |
| Chaffins Heating and Plumbing Ltd | Construction | 2014 |
| Chahal Haulage Ltd | Transport & logistics | 2017 |
| Chahal KMP Ltd | Transport & logistics | 2023 |
| Chahal Sweet Centre Ltd | Hospitality | 2008 |
| Chahat Limited | Transport & logistics | 2026 |
| Chai Chenak Limited | Hospitality | 2023 |
| Chai Green Glasgow Limited | Hospitality | 2025 |
| Chai Kitchen Ltd | Hospitality | 2023 |
| Chai Mast Ltd | Hospitality | 2024 |
| Chai Mast Southall Limited | Hospitality | 2025 |
| Chaii Experts Woking Ltd | Hospitality | 2024 |
| Chain PVT Limited | Real estate | 2022 |
| Chakauya Ltd | Public administration | 2026 |
| Chakra Homes Ltd | Real estate | 2024 |
| Chakra Homes Management Ltd | Hospitality | 2025 |
| Chakreiki Ltd | Health & social care | 2021 |
| Chalcott House Ltd. | Professional & scientific | 2008 |
| Chalet Homes Ltd | Real estate | 2021 |
| Chalfont House Denham Limited | Real estate | 2024 |
| Chalvey Autos Ltd | Wholesale & retail | 2020 |
| Chalvey Autos South East Ltd | Wholesale & retail | 2022 |
| Chalvey Development Limited | Households | 1967 |
| Chalvey Local Limited | Wholesale & retail | 2012 |
| Chalvey OFF Licence Ltd | Wholesale & retail | 2019 |
| Chalvey Supported Living Ltd | Health & social care | 2021 |
| Chama Properties Limited | Real estate | 2024 |
| Chama Technologies Ltd | Information & communication | 2024 |
| Chambers Roofing Ltd | Construction | 2025 |
| Chameleon Consulting (Healthcare) Limited | Health & social care | 2013 |
| Champion Constructor Limited | Construction | 2018 |
| Champsforlife Ltd | Extraterritorial | 2024 |
| Chana Assets Ltd | Financial services | 2024 |
| Chana Housing Limited | Real estate | 2022 |
| Chancery Leasing Ltd | Administrative & support | 2018 |
| Chandra Infra Limited | Real estate | 2022 |
| Chandéor Cosmetics Ltd | Wholesale & retail | 2026 |
| Changebeat Limited | Extraterritorial | 2007 |
| Channel Heat Systems Ltd | Construction | 2026 |
| Channel Islands Express Ltd | Transport & logistics | 2015 |
| Chaospilots Limited | Information & communication | 2004 |
| Chapchap Couriers Ltd | Transport & logistics | 2021 |
| Chaplin Court Residents Management Co Ltd | Households | 2021 |
| Chapman Recruitment Ltd | Administrative & support | 2017 |
| Chapman Steelwork Fabrication Limited | Construction | 2014 |
| Chapmans Steel Fabrication Solutions Ltd | Manufacturing | 2020 |
| Charcoal Daddy Slough Ltd | Wholesale & retail | 2023 |
| Charcoal Lebanese Limited | Hospitality | 2013 |
| Charda Punjab Ltd | Construction | 2025 |
| Chardi Engineering Ltd | Construction | 2018 |
| Charis MC Ltd | Hospitality | 2020 |
| Charisgrace Limited | Health & social care | 2023 |
| Charishta UK Limited | Hospitality | 2024 |
| Charles Clothing Company Ltd | Wholesale & retail | 2024 |
| Charles Prestigio Limited | Wholesale & retail | 2025 |
| Charleston Building Company Ltd | Construction | 2014 |
| Charlie's Angels Aesthetics and Beauty Ltd | Other services | 2022 |
| Charllie's Ltd | Other services | 2022 |
| Chart Ltd | Real estate | 2007 |
| Charter H & C Limited | Administrative & support | 2007 |
| Charterfield Capital Partners Limited | Professional & scientific | 2010 |
| Charteris Management Ltd | Professional & scientific | 2013 |
| Charters Advisory Ltd | Administrative & support | 2025 |
| Charters Associates Ltd | Professional & scientific | 2021 |
| Charters Group Holdings Ltd | Financial services | 2025 |
| Charzam Limited | Wholesale & retail | 2026 |