| Cgjg Limited | Administrative & support | 2014 |
| CGL Group Ltd | Hospitality | 2026 |
| CGS Berkshire Care and Security Ltd | Administrative & support | 2017 |
| CH Probate Services Ltd | Professional & scientific | 2024 |
| CH Supplies and Services Ltd | Professional & scientific | 2022 |
| CHA2GP Ltd | Health & social care | 2025 |
| Chahal Holdings Group Ltd | Real estate | 2025 |
| Chalfont Investment Limited | Construction | 2018 |
| Chalkstring Limited | Information & communication | 2017 |
| Challen & Son's Limited | Agriculture & fishing | 2012 |
| Challenge Training and Consulting Ltd | Professional & scientific | 2024 |
| Challis Maritime Securities Limited | Wholesale & retail | 2013 |
| Chalvey Mini Market Ltd | Wholesale & retail | 2025 |
| Chandlers Quay (Phase 2) Residents Association Limited | Households | 1999 |
| Chandlers Quay (Phase II) Management Company Limited | Real estate | 2006 |
| Change Maker Academy Training Ltd | Information & communication | 2025 |
| Changing Faces Cosmetics Ltd | Administrative & support | 2018 |
| Channahemies Limited | Health & social care | 2024 |
| Chapman Commercial Ltd | Professional & scientific | 2025 |
| Chapman Draper Estates Ltd | Real estate | 2025 |
| Chariot Chauffeurs Ltd | Transport & logistics | 2024 |
| Charis Mwauras Limited | Real estate | 2026 |
| Charissa Care Ltd | Health & social care | 2022 |
| Charity for ST Joseph's Missionary Society (Generalate) | Professional & scientific | 1950 |
| Charlemagne Capital Holdings Ltd | Information & communication | 2016 |
| Charles Bond Associates Limited | Administrative & support | 2025 |
| Charles Potter Property Limited | Real estate | 2018 |
| Charlesforte Solutions Limited | Professional & scientific | 2013 |
| Charlie’S Weld Ltd | Professional & scientific | 2024 |
| Chart and Design Films Limited | Information & communication | 2017 |
| Charterneed Limited | Administrative & support | 2009 |
| Chartland Close Management Limited | Households | 2025 |
| Chase Cocoa Consulting Ltd | Professional & scientific | 2023 |
| Chase Management Services Limited | Professional & scientific | 2018 |
| Chatomatic AI Limited | Other services | 2025 |
| Chauhan and Clark Ltd | Real estate | 2023 |
| Chawla Consultants Limited | Real estate | 2000 |
| Chawla Properties Ltd | Real estate | 2024 |
| CHB Group Limited | Financial services | 1989 |
| CHB P H R Limited | Financial services | 1991 |
| CHB Products Limited | Professional & scientific | 1973 |
| Chef Paul Ltd | Hospitality | 2019 |
| CHEFMIKEY01 Ltd | Professional & scientific | 2025 |
| Chelsea Accounting Limited | Professional & scientific | 2021 |
| Chelsea Pitch Owners PLC | Arts & recreation | 1993 |
| Chemical Manufacture and Refining Limited | Professional & scientific | 1990 |
| Chemico Group Limited | Wholesale & retail | 2021 |
| Chemin Trading UK Limited | Wholesale & retail | 2018 |
| Chertsey Properties Limited | Real estate | 2004 |
| Chester Energy Storage Limited | Energy | 2024 |
| Chestnut Contracting Ltd | Administrative & support | 2013 |
| Chevrton Company Limited | Wholesale & retail | 2024 |
| CHI Beauty Ltd | Other services | 2025 |
| Chic Smile Dental Clinic Limited | Health & social care | 2017 |
| Chicago I Bidco Limited | Financial services | 2020 |
| Chiefs Digital Media Ltd | Professional & scientific | 2019 |
| Chilbridge Limited | Financial services | 2025 |
| Chilli-Bob PR Ltd | Professional & scientific | 2020 |
| Chiltern Homes (Berkshire) Ltd | Construction | 2021 |
| Chiltern Hub Consulting Limited | Professional & scientific | 2024 |
| Chiltern Investment Group Ltd | Real estate | 2025 |
| Chiltern Manor Close RES. Assoc. (Taplow) Limited | Real estate | 1995 |
| Chiltern UK Properties Limited | Real estate | 2021 |
| Chingford Technical Coatings Limited | Manufacturing | 1980 |
| Chiplogic Technologies Limited | Information & communication | 2014 |
| Chisholm Properties U.K. Limited | Real estate | 1997 |
| Chiswick Skips Limited | Water & waste | 2013 |
| Chloe Adele Design Limited | Professional & scientific | 2016 |
| Chloe Leibowitz Coaching Limited | Other services | 2023 |
| Choco Coffee Limited | Hospitality | 2019 |
| Choicewatch Limited | Professional & scientific | 1987 |
| Choose Fruit Ltd | Wholesale & retail | 2020 |
| Choose Vaping Ltd | Wholesale & retail | 2019 |
| Chor Bazaarr Restaurants Ltd | Real estate | 2023 |
| Chris Carey Property Services Limited | Real estate | 2017 |
| Chris Hall Leisure Services Limited | Arts & recreation | 2014 |
| Chris LEE Trojan Training Limited | Health & social care | 2013 |
| Chrisalis Consulting Limited | Administrative & support | 2009 |
| Christen Forster Limited | Wholesale & retail | 2007 |
| Christian Drywall Ltd | Construction | 2026 |
| Christie Balmoral Ltd | Manufacturing | 2025 |
| Christine Ingram Gardens M. C. Limited | Administrative & support | 2007 |
| Christopher Ward (London ) Holdings Limited | Wholesale & retail | 2014 |
| Christopher Ward London Limited | Manufacturing | 2004 |
| Christopher Wicks Limited | Wholesale & retail | 2005 |
| Christopher Wren Limited | Construction | 1978 |
| Chrysanthemum Hospitality Services Limited | Wholesale & retail | 2025 |
| CHT Properties LLP | | 2013 |
| Churchward Consulting Limited | Professional & scientific | 2024 |
| Chutney Jacks Maidenhead Restaurants Ltd | Other services | 2018 |
| Chwe Acupuncture Ltd | Other services | 2025 |
| CI Consultancy Ltd | Financial services | 2012 |
| CI Projects Limited | Construction | 2022 |
| Ciao Fabrics by Hilary Ltd | Manufacturing | 2018 |
| CIM Direct Limited | Extraterritorial | 1991 |
| CIM Enterprises Ltd | Other services | 2004 |
| CIM Holdings Limited | Extraterritorial | 1991 |
| Cinarbro Limited | Wholesale & retail | 2021 |
| Cineav Holding UK Ltd | Financial services | 2022 |
| Cinq Stars Hides Genuine Leather UK Limited | Wholesale & retail | 2024 |