| Chennai Silks Emporium Ltd | Wholesale & retail | 2020 |
| Cherokee Chief Limited | Real estate | 2015 |
| Cherwell Limited | Information & communication | 2015 |
| Cheshire Hotel Trading Ltd | Hospitality | 2020 |
| Chess Projects Ltd | Real estate | 2011 |
| Chest Stores Ltd | Wholesale & retail | 2014 |
| Chester Events Limited | Administrative & support | 2024 |
| Chester ROW Management Limited | Real estate | 2002 |
| Chetan Enterprise Limited | Construction | 2025 |
| Chhaya Group Limited | Manufacturing | 2024 |
| CHI RHO Services CMF Ltd | Construction | 2020 |
| Chiapetti Properties Ltd | Real estate | 2019 |
| Chicck N Joy Ltd | Hospitality | 2024 |
| Chicco Nero Ltd | Wholesale & retail | 2020 |
| Chicken & Dough Ltd | Hospitality | 2025 |
| Chicken Crew Limited | Wholesale & retail | 2025 |
| Chicken Done Different Franchise Ltd | Professional & scientific | 2026 |
| Chicken Done Different Holding Ltd | Financial services | 2026 |
| Chicken Done Different INT Ltd | Professional & scientific | 2026 |
| Chicken Done Different Ltd | Hospitality | 2026 |
| Chicky's Piri Piri Ltd | Hospitality | 2025 |
| Chico Traders Ltd | Wholesale & retail | 2017 |
| Chief Commerce Ltd | Wholesale & retail | 2022 |
| Chigwell Operations Ltd | Construction | 2024 |
| Children Sports League Ltd | Education | 2020 |
| Chillo Piro Ltd | Hospitality | 2023 |
| Chimpsky Records Limited | Information & communication | 2016 |
| Chin WAG International Limited | Professional & scientific | 2022 |
| China Democracy Party UK Committee CIC | Other services | 2024 |
| China UK Culture Travel Ltd | Administrative & support | 2024 |
| Chine Master Limited | Hospitality | 2025 |
| Chinese Medicine Centre (London) Limited | Health & social care | 2009 |
| Chinimpex Limited | Wholesale & retail | 2004 |
| Chipatel Limited | Hospitality | 2025 |
| Chitragupta Services Ltd | Professional & scientific | 2015 |
| Chiu's Properties Ltd | Real estate | 2021 |
| Chocolate Kizomba Ltd | Administrative & support | 2025 |
| Choice Box Limited | Wholesale & retail | 2002 |
| Choice Construction Enterprise Limited | Construction | 2018 |
| Choka Limited | Health & social care | 2022 |
| Chop Chop London Ltd | Wholesale & retail | 2017 |
| Chotyniec Limited | Wholesale & retail | 2015 |
| Chowpaati Ltd | Manufacturing | 2024 |
| CHP UK Enterprise Limited | Wholesale & retail | 2011 |
| CHR Motors Ltd | Wholesale & retail | 2025 |
| Chrillia Properties Limited | Real estate | 2016 |
| Chris Blake (Butchers) Limited | Wholesale & retail | 1982 |
| Chris Hayes Limited | Administrative & support | 2007 |
| Chris NWL Construction Ltd | Construction | 2021 |
| Chrisstransport Ltd | Transport & logistics | 2023 |
| Christopher Mathew Ltd | Professional & scientific | 2018 |
| Chrome Clouds Ltd | Wholesale & retail | 2018 |
| CHS Group London Limited | Construction | 2018 |
| Chuc. Ltd | Wholesale & retail | 2021 |
| Chunky's Stroopwafels Ltd | Hospitality | 2022 |
| Churchill Gardens Amenity Limited | Real estate | 1985 |
| Churros Buenos Ltd | Hospitality | 2022 |
| Chutty Collections Limited | Wholesale & retail | 2025 |
| CI Wembley Services Ltd | Administrative & support | 2022 |
| Ciao L Manufacturing Limited | Manufacturing | 2025 |
| Cibo Di'Roma Ltd | Hospitality | 2023 |
| Cibt Construction Ltd | Professional & scientific | 2016 |
| Cidmar Limited | Professional & scientific | 1957 |
| Ciiir Limited | Extraterritorial | 2023 |
| Cinematic Tales Ltd | Information & communication | 2019 |
| Cinemax London Limited | Information & communication | 2013 |
| Cinnamon Food to Go Ltd | Hospitality | 2021 |
| Cinnamon Hospitality Ltd | Hospitality | 2022 |
| Ciobotariu Ltd | Construction | 2014 |
| Cipherstack Ltd | Professional & scientific | 2026 |
| Circle 5 International Limited | Transport & logistics | 1993 |
| Circle Arts Limited | Professional & scientific | 2020 |
| Circumcision Limited | Health & social care | 2012 |
| Cirrus Consulting Services Ltd | Professional & scientific | 2021 |
| Citadel Cons Ltd | Construction | 2020 |
| CITI2CITI Limited | Transport & logistics | 2024 |
| Citrine Legal Limited | Professional & scientific | 2024 |
| City Building Initiative Ltd | Other services | 2023 |
| City DRY Cleaners Ltd | Other services | 2025 |
| City Frame Works Ltd | Construction | 2024 |
| City Living LDN Limited | Real estate | 2017 |
| City Living Short LET Limited | Real estate | 2019 |
| City Restaurants Assets Ltd | Other services | 2021 |
| City Restaurants Franchise Ltd | Other services | 2021 |
| City Restaurants Group Ltd | Hospitality | 2021 |
| City Restaurants IP Ltd | Other services | 2021 |
| City VH Ltd | Construction | 2025 |
| City Wise Accountants Ltd | Professional & scientific | 2010 |
| CITY24 Ltd | Construction | 2019 |
| Citygate Marketing Limited | | 1987 |
| Cityspeed Limited | Hospitality | 1998 |
| CJ Excellent Security Ltd | Administrative & support | 2026 |
| CJ Maintance Ltd | Construction | 2026 |
| CJT Limited | Professional & scientific | 2025 |
| CKC Garage Ltd | Wholesale & retail | 2020 |
| Ckrs Home Care Ltd | Health & social care | 2026 |
| Cladmax Limited | Construction | 2016 |
| Clamik Ltd | Construction | 2020 |
| Clarity Assets Ltd | Construction | 2024 |
| Clarity Finance Limited | Financial services | 2005 |