| Cambridge Knowledge Ltd | Professional & scientific | 2021 |
| Cameron Mcinnes Property Limited | Real estate | 2014 |
| Cameron Publicity and Marketing Ltd | Professional & scientific | 2013 |
| Campbell & Lilly Ltd | Real estate | 2023 |
| Canal Street Research Limited | Professional & scientific | 2019 |
| Cancerscan UK Ltd | Health & social care | 2023 |
| Candoo Associates Limited | Professional & scientific | 2016 |
| Candour Partners Ltd | Information & communication | 2024 |
| Canopygods Ltd | Manufacturing | 2022 |
| CAP ET AL Limited | Professional & scientific | 2013 |
| Capelevel Limited | Transport & logistics | 1994 |
| Capital Developments Limited | Construction | 2001 |
| Capital Group Office Solutions Limited | Professional & scientific | 2025 |
| Capitas (UK) Limited | Professional & scientific | 2013 |
| Capitas Leasing Limited | Professional & scientific | 2007 |
| Capitas Vehicle Finance Limited | Extraterritorial | 2007 |
| Capnal Limited | Manufacturing | 2015 |
| Capsid Ltd | Manufacturing | 2024 |
| Capstar Advisers Limited | Professional & scientific | 2012 |
| Capstar Associates Limited | Professional & scientific | 2012 |
| Capstar Communications Limited | Professional & scientific | 2013 |
| Capstar Partners UK Limited | Extraterritorial | 2014 |
| Captive Imagination Limited | Manufacturing | 2013 |
| Car Sales Surrey Ltd | Wholesale & retail | 2026 |
| Care and Health Law Ltd | Administrative & support | 2026 |
| CARE4MILKTEETH Limited | Health & social care | 2013 |
| Carefree Caretree Ltd | Wholesale & retail | 2025 |
| Carelog AI Limited | Information & communication | 2025 |
| Carennect Ltd | Administrative & support | 2023 |
| Carers With Care Properties Limited | Real estate | 2016 |
| Caribou Digital (UK) Limited | Information & communication | 2014 |
| Caribou Digital Limited | Information & communication | 2014 |
| Caribou Group Limited | Financial services | 2025 |
| Caribou Skills Development C.I.C. | Information & communication | 2023 |
| Carlton Neurodevelopmental Services Ltd | Health & social care | 2025 |
| Carlton Psychology Limited | Health & social care | 2012 |
| Carlton Yard Limited | Households | 2015 |
| Carneysweeney Ltd | Professional & scientific | 2019 |
| Carpet & Flooring (Farnborough) Limited | Wholesale & retail | 2012 |
| Carr Engineering Limited | Extraterritorial | 1993 |
| Carrera Four S Limited | Professional & scientific | 2022 |
| Carriages Cafe 2024 Limited | Hospitality | 2024 |
| Carrington (1953) Limited | Professional & scientific | 1953 |
| Carrington Roofing & Construction Ltd | Construction | 2020 |
| Carstens & Robinson Ltd. | Professional & scientific | 2014 |
| Carter and Co Productions Limited | Information & communication | 2016 |
| Carter Brothers Properties Limited | Real estate | 1964 |
| Carter's Landscaping and Construction Limited | Construction | 2026 |
| Carto Graphics Limited | Administrative & support | 2008 |
| Cartref Property Limited | Real estate | 2016 |
| Carvalet.Co.Uk Limited | Professional & scientific | 2013 |
| Casa Kirasa Limited | Real estate | 2023 |
| Casa Lyndy Limited | Real estate | 2023 |
| Casa Padel Ltd | Arts & recreation | 2024 |
| Cascaidr CIC | Other services | 2017 |
| Case Station Central and South America Limited | Administrative & support | 2018 |
| Case Station India Limited | Information & communication | 2014 |
| Caspip Limited | Construction | 2016 |
| Cassara Limited | Real estate | 2012 |
| Castello Limited | Hospitality | 2022 |
| Castle Entertainment Limited | Information & communication | 2019 |
| Castle Heights Court Limited | Households | 1992 |
| Castle LEA Management Ltd | Real estate | 2016 |
| Castle Productions (Farnham) Limited | | 1989 |
| Castle Street Freehold Limited | Real estate | 2012 |
| Castle Street Properties Limited | Real estate | 2019 |
| Castlekemp Ltd | Manufacturing | 2011 |
| Castleton Dental Practice Ltd | Health & social care | 2011 |
| Castleton Residential Properties Limited | Real estate | 2021 |
| Catally Limited | Professional & scientific | 2020 |
| Catalyst Psychotherapy and Counselling Services Ltd | Administrative & support | 2008 |
| Catch Telecom Limited | Information & communication | 2006 |
| Cathcart Financial Planning Limited | Financial services | 2017 |
| Catherine Court Management Company (Farnham) Limited | Households | 2010 |
| Cauliflower Group Limited | Manufacturing | 2007 |
| Causeway Planning Limited | Professional & scientific | 2022 |
| Cave Adsum Ltd | Professional & scientific | 2010 |
| CAW Clinical Workforce Advisory Limited | Professional & scientific | 2026 |
| Cayen Services LLP | | 2012 |
| Cayenelle Ltd | Information & communication | 2025 |
| CBF Taxation Services Limited | Administrative & support | 2017 |
| CC Communications & Events Limited | Administrative & support | 2014 |
| CCB Legal Ltd | Professional & scientific | 2026 |
| Ccss Ltd - Chappell Change Solutions and Services Limited | Professional & scientific | 2016 |
| CCW Inimitable Limited | Professional & scientific | 2018 |
| CEA Nrswa Ltd | Construction | 2018 |
| Cedar Studios Ltd | Manufacturing | 2019 |
| Cedardale Arboricultural Specialists Limited | Agriculture & fishing | 2014 |
| Cedric Coiffeur Limited | Other services | 2024 |
| Celeritas Applied Technologies Limited | Professional & scientific | 2025 |
| Cellarat Productions Limited | Information & communication | 2009 |
| Celsius Commercial Refrigeration Limited | Manufacturing | 2022 |
| Central Systems Installations Limited | Information & communication | 1983 |
| Centre for Finance, Innovation and Technology | Other services | 2023 |
| Centurion Litigation Ltd | Professional & scientific | 2025 |
| Cerato Limited | Information & communication | 2016 |
| CGV Transport Consultants Limited | Professional & scientific | 2024 |
| Chain Capital Technologies Ltd | Information & communication | 2024 |
| Chalet Gardens (Bordon) Residents Limited | Households | 1991 |
| Chalet Hill (Bordon) Residents Limited | Households | 1988 |