| Castle Land and Development (West Sussex) Ltd | Real estate | 2006 |
| Castle Street Clinic Limited | Health & social care | 1994 |
| Castlebrick Ltd. | Real estate | 2003 |
| Catalan Limited | Wholesale & retail | 1998 |
| Catalyst Corporate Development Limited | Wholesale & retail | 1989 |
| Category One Property Ltd | Real estate | 2020 |
| Catersales Ltd | Wholesale & retail | 1998 |
| Catherine Stanley Limited | Health & social care | 2004 |
| Cator Estate (Beckenham) Limited | Extraterritorial | 1991 |
| Cator Estate (Roads) Limited | Professional & scientific | 1990 |
| CC Banstead Ltd | Hospitality | 2017 |
| CCX Limited | Administrative & support | 2008 |
| Cddcuk Ltd | Professional & scientific | 2008 |
| CE IT Consultancy Services UK Ltd | Information & communication | 2013 |
| Cedar Business Services (UK) Limited | Professional & scientific | 1989 |
| Cedar Court Residents Management Company Limited | Real estate | 1980 |
| Cedar House (Epsom) Management Company Limited | Households | 2022 |
| Cedar Oak Healthcare Services Ltd | Health & social care | 2019 |
| Cedars Propco Limited | Households | 2017 |
| Cedarwood Property Investments Limited | Construction | 2012 |
| Ceegees Couture Ltd | Manufacturing | 2024 |
| Celebrity YOU Limited | Wholesale & retail | 2020 |
| Celia Court Management Co. Limited | Households | 1963 |
| Celsius Heating Ltd | Manufacturing | 2007 |
| Celtic Contractors Limited | Construction | 1995 |
| Cennox ATM Parts Ltd | Information & communication | 1993 |
| Central Cleaning Services (Surrey) Limited | Administrative & support | 2004 |
| Central Places Consult Ltd | Professional & scientific | 2024 |
| Centrelore Limited | Manufacturing | 1976 |
| Centro Property Services Limited | Professional & scientific | 1990 |
| Centro Residential Sales and Lettings Limited | Real estate | 2005 |
| CGA Dynamics Ltd | Information & communication | 2005 |
| CGH Advisory Ltd | Professional & scientific | 2024 |
| CGS Photographers Limited | Professional & scientific | 2007 |
| CGW Properties Limited | Real estate | 2007 |
| Chaaya Holdings 1 Ltd | Real estate | 2018 |
| Chaaya Holdings 2 Ltd | Real estate | 2018 |
| Chaaya Holdings 3 Ltd | Real estate | 2018 |
| Chaldon Mead Management Company Limited | Households | 2015 |
| Chalmed Limited | Administrative & support | 2006 |
| Chamberhill Limited | Construction | 1990 |
| Champion Solutions Limited | Wholesale & retail | 2005 |
| Chapel Grove Management Company Limited | Households | 1995 |
| Chapel Street Guildford Limited | Real estate | 2006 |
| Charingwood Limited | Real estate | 2006 |
| Charis Holdings Ltd | Other services | 2017 |
| Charles Mitchell,Limited | | 1922 |
| Charlotteville Jubilee Trust Limited | Health & social care | 2002 |
| Charnia Resources Limited | Administrative & support | 2006 |
| Chartcare International (UK) Limited | Other services | 2007 |
| Charterhouse Enterprises Limited | Other services | 1990 |
| Charton Manor Farm Limited | Agriculture & fishing | 1998 |
| Chartwell 1 Lettings Limited | Real estate | 2019 |
| Chartwell Properties Limited | Real estate | 1999 |
| Chartwood Place Residents Association Limited | Households | 1999 |
| Chase Plastering & Decorating Service Limited | Construction | 2003 |
| Chasing Ceylon Ltd | Information & communication | 2018 |
| Chateau Enterprises Ltd | Wholesale & retail | 1996 |
| Chatham Court Property Management Limited | Households | 2004 |
| Chaucer Management (1997) Ltd | Professional & scientific | 1996 |
| Chauffeur Class London Ltd | Transport & logistics | 2015 |
| Chauffeur Direct Limited | Extraterritorial | 2005 |
| Cheam Accident Repairs Ltd | Wholesale & retail | 2003 |
| Cheam Car Wash Ltd | Administrative & support | 2023 |
| Cheam Scaffolding Limited | Construction | 2005 |
| Cheam Village Pharma Limited | Extraterritorial | 2023 |
| Checkmedal Limited | Education | 1992 |
| Checkultra Limited | Professional & scientific | 1991 |
| Cheer Project Management Services Limited | Information & communication | 2017 |
| Chelmvale Limited | Professional & scientific | 1976 |
| Chelsea Bridge Wharf (C South) Limited | Professional & scientific | 2005 |
| Chelsea Bridge Wharf Car Park Limited | Extraterritorial | 2003 |
| Chelsea Windows Limited | Construction | 2002 |
| Cherry Tree Consultants Limited | Professional & scientific | 2015 |
| Cherrybank Consulting Limited | Professional & scientific | 2019 |
| Cherryoak Limited | Construction | 1974 |
| Chertsey BOY Limited | Real estate | 2018 |
| Chertsey BOY Management Limited | Real estate | 2019 |
| Cherukuri Homes Ltd | Real estate | 2022 |
| Chesterman Ltd | Information & communication | 1987 |
| Chestnut Court Management Company (Richmond) Limited | Households | 2006 |
| Chic DRY Cleaners Limited | Other services | 2007 |
| Chic Living Limited | Hospitality | 2019 |
| Child's Play Nursery School Limited | Health & social care | 1987 |
| Children of Colour Limited | Health & social care | 2003 |
| Childtalk Solutions Ltd | Health & social care | 2006 |
| Chilli Nights Limited | Hospitality | 2003 |
| Chillipas' Foods Limited | Hospitality | 2021 |
| Chipsmiths Limited | Hospitality | 1998 |
| Chivic London Limited | Information & communication | 2004 |
| CHM Associates Limited | Extraterritorial | 2007 |
| Chobham Car Spares Limited | Water & waste | 2001 |
| Chobham Smile Dental Practice Ltd | Professional & scientific | 2007 |
| Choc Treat Ltd | Wholesale & retail | 2019 |
| Choi's WOK Ltd | Hospitality | 2006 |
| Choiceco Limited | Hospitality | 1990 |
| Choisya Limited | Real estate | 2023 |
| CHR Metals Limited | Professional & scientific | 2000 |
| Chris Baron Music Limited | Arts & recreation | 2003 |
| Chris Tizzard Architectural Limited | Professional & scientific | 2004 |