| Cherrymind Ltd | Information & communication | 2024 |
| Cherryrule Limited | Real estate | 1979 |
| Cherwell HK Limited | Financial services | 2015 |
| Chesdon Investment Limited | Real estate | 2019 |
| Cheshire Sports Engineering Ltd | Professional & scientific | 2024 |
| Chesnoiu Interiors Ltd | Construction | 2020 |
| Chespark Limited | Real estate | 2018 |
| Chess Architecture & Development Limited | Construction | 2001 |
| Chess Business Group Limited | Administrative & support | 2018 |
| Chess Communications Limited | Administrative & support | 2001 |
| Chess Engage Limited | Professional & scientific | 2020 |
| Chess for Life Ltd | Education | 2022 |
| Chess Homes Developments Ltd | Construction | 2019 |
| Chess Homes Limited | Construction | 2002 |
| Chess Land Limited | Professional & scientific | 2021 |
| Chess Properties Limited | Extraterritorial | 2022 |
| Chess Property Services (London) Ltd | Financial services | 2008 |
| Chesswood Court (Rickmansworth) Residents Association Limited | Real estate | 1994 |
| Chester Hyde Limited | Real estate | 2016 |
| Chetan Srikrishna Limited | Agriculture & fishing | 2017 |
| Chey Rose Limited | Real estate | 2019 |
| Chez TOI Limited | Real estate | 2017 |
| CHG Capital Ltd | Professional & scientific | 2017 |
| CHG1 Limited | Professional & scientific | 2013 |
| Chhaya Care Limited | Administrative & support | 2023 |
| Chhayani Ventures Ltd | Administrative & support | 2024 |
| CHI KRI Classes Limited | Health & social care | 2013 |
| CHI KRI Limited | Other services | 2003 |
| Chic Derma Limited | Health & social care | 2025 |
| Chicabella Ltd | Wholesale & retail | 2024 |
| Chick N Run Co Ltd | Hospitality | 2026 |
| Chicken and Cevapi Limited | Hospitality | 2019 |
| Chicken Cafreal Piri Piri Ltd | Hospitality | 2022 |
| Chicken Hub (Harrow) Ltd | Hospitality | 2025 |
| Chicken Roost Ltd | Hospitality | 2022 |
| Chicken Village Ltd | Hospitality | 2018 |
| Chidra Limited | Real estate | 2021 |
| Chief Grips Ltd | Information & communication | 2010 |
| Chiha Limited | Construction | 2025 |
| Chika Ltd | Administrative & support | 2009 |
| Chikchak Sushi & Noodles Limited | Hospitality | 2020 |
| Chikku Consultancy Limited | Health & social care | 2020 |
| Child and Adolescent Psychiatry Consultation Ltd | Health & social care | 2023 |
| Children Making a Change Ltd | Education | 2013 |
| Chill Produce Ltd | Wholesale & retail | 2025 |
| Chilli LDN Ltd | Professional & scientific | 2022 |
| Chiltern Business Investments Ltd | Real estate | 2016 |
| Chiltern Development Limited | Construction | 2021 |
| Chiltern Greenspace Ltd | Real estate | 2020 |
| Chiltern London Limited | Construction | 1985 |
| Chiltern Orthopaedics Ltd | Health & social care | 2019 |
| Chilton Care Homes Ltd. | Real estate | 1997 |
| Chilton Home Improvements Limited | Construction | 2016 |
| Chilton Roofing & Guttering Limited | Construction | 2025 |
| Chilton Tree Care Limited | Agriculture & fishing | 2025 |
| Chimaero Limited | Manufacturing | 2018 |
| Chimedale Limited | Information & communication | 2009 |
| Chimely Limited | Professional & scientific | 2021 |
| Chimewood Limited | Hospitality | 2001 |
| Chimsons Limited | Wholesale & retail | 1977 |
| Chin Chin Choo Ltd | Hospitality | 2023 |
| Chinatown Bakery Limited | Administrative & support | 2012 |
| Chinco Consultancy Limited | Health & social care | 2011 |
| Chinese Buffet HUT Ltd | Hospitality | 2025 |
| Chinthapalli Limited | Health & social care | 2011 |
| Chip Group Holdings Limited | Administrative & support | 2020 |
| Chip Systems Limited | Information & communication | 1994 |
| Chipperfield Investments Limited | Real estate | 2017 |
| Chippindale Plant Limited | Administrative & support | 1949 |
| Chira Luxe Ltd | Wholesale & retail | 2020 |
| Chirantan Infosys Limited | Information & communication | 2001 |
| Chirithoti Consulting Limited | Professional & scientific | 2017 |
| Chiroton Limited | Other services | 2007 |
| Chiston Ltd | Real estate | 2005 |
| Chisty Law Chambers Limited | Professional & scientific | 2017 |
| Chisty Welfare Ltd | Health & social care | 2022 |
| Chisun Limited | Health & social care | 2023 |
| Chiswell Investment Limited | Other services | 2021 |
| Chiswick Arts Ltd | Education | 2022 |
| Chivers Construction Ltd | Construction | 2021 |
| Chixter Pizza Stop Limited | Hospitality | 2018 |
| CHL Property Management Ltd | Administrative & support | 2016 |
| Chlia Consulting Ltd. | Administrative & support | 2019 |
| Chloe Campbell (Director) Limited | Information & communication | 2019 |
| Chlt Limited | Hospitality | 2024 |
| CHM Global Limited | Transport & logistics | 2023 |
| Chochkov Logistic Ltd | Transport & logistics | 2022 |
| Choice Consultancy London Limited | Administrative & support | 2012 |
| Choice Pride Health Limited | Health & social care | 2016 |
| Chokshi Limited | Health & social care | 2011 |
| Chola Builders Ltd | Construction | 2024 |
| Chopada Enterprise Limited | Wholesale & retail | 2025 |
| Chopped Herring Records Limited | Arts & recreation | 2018 |
| Chopra Catering Limited | Hospitality | 2016 |
| Chord Travel Limited | Administrative & support | 2026 |
| Chota PRA Ltd | Hospitality | 2023 |
| Chotai Limited | Health & social care | 2021 |
| Chotalia Engineering Limited | Construction | 2016 |
| Chowdrin Ltd | Real estate | 2025 |
| Chris Brown Structural Engineering Limited | Professional & scientific | 2008 |