| Callglide Limited | Information & communication | 2016 |
| Cambiar Leadership Ltd | Professional & scientific | 2025 |
| Cambridge Diagnostics (UK) Limited | Wholesale & retail | 2013 |
| Camille Properties Ltd | Real estate | 2023 |
| Camille Restaurant Limited | Hospitality | 2023 |
| Camille Toscano Ltd | Other services | 2023 |
| Camp Financial Consulting Ltd | Professional & scientific | 2026 |
| Camuz Property Ltd | Real estate | 2025 |
| Candr Media Group Limited | Information & communication | 2020 |
| Candr Media Group Newco Limited | Information & communication | 2023 |
| Cannaregio Trading Limited | Real estate | 2025 |
| Canopy Digital Group Ltd | Information & communication | 2025 |
| Cape Consulting Limited | Professional & scientific | 2022 |
| Capital Security and Protection Limited | Construction | 2014 |
| Car and Watch Competitions Limited | Arts & recreation | 2026 |
| Car-Concierge-Uk Ltd | Wholesale & retail | 2020 |
| Cara (Strategy) Consulting Ltd | Professional & scientific | 2021 |
| Cardwell Investment Technologies UK Limited | Financial services | 2008 |
| Care 2B Stable Ltd | Health & social care | 2025 |
| Care Campaign for the Vulnerable Limited | Health & social care | 2018 |
| Care Home Property Services Limited | Administrative & support | 2017 |
| Carecamp Limited | Wholesale & retail | 1995 |
| Carehive Recruitment Ltd | Administrative & support | 2023 |
| Carlton Homes (Southern) Limited | Construction | 2006 |
| Carnival Relocations Limited | Extraterritorial | 2009 |
| Carol Montpart Studio Limited | Professional & scientific | 2018 |
| Caron French Limited | Real estate | 2012 |
| Carpet Bird Ltd | Administrative & support | 2021 |
| Carrick Residential Properties Limited | Real estate | 2025 |
| Carrington Residential Limited | Construction | 2001 |
| Carrot Consulting Limited | Professional & scientific | 2026 |
| Carrus Properties Limited | Construction | 2012 |
| Carter’S Plastering Ltd | Construction | 2023 |
| Cartoon Effects Ltd | Professional & scientific | 2016 |
| Carty Surveying Ltd | Professional & scientific | 2014 |
| Case Elite Education Ltd | Professional & scientific | 2025 |
| Caselton-Clark Ltd | Administrative & support | 2007 |
| Casson Coaching & Consulting Limited | Professional & scientific | 2016 |
| Castle Cruising Company Limited | Transport & logistics | 1997 |
| Castle Garden Construction Limited | Other services | 2015 |
| Castle Glass & Windows Limited | Construction | 2006 |
| Castlemore Homes Bucklesham Limited | Construction | 2021 |
| Castlemore Homes Caldecote Limited | Construction | 2024 |
| Castlemore Homes Group Limited | Financial services | 2021 |
| Castlemore Homes Haddenham Limited | Construction | 2021 |
| Castlemore Homes Limited | Construction | 2020 |
| Catchup TV Limited | Information & communication | 2013 |
| Catlip Holdings Limited | Other services | 1958 |
| Causeway Software Holdings Limited | Information & communication | 2013 |
| Causeway Technologies Holdings Limited | Information & communication | 2013 |
| Causeway Technologies Limited | Information & communication | 2000 |
| CBS Developments Ltd | Real estate | 2023 |
| CCL A1 Unit Ltd | Real estate | 2026 |
| CCL Group Holdings Ltd | Financial services | 2026 |
| CCM & Sons Limited | Real estate | 2022 |
| Cedar House Mitcham Limited | Real estate | 2020 |
| Cedar Properties Management Limited | Real estate | 2006 |
| Ceedoo Digital Limited | Professional & scientific | 2017 |
| Ceemea Management Services Ltd | Professional & scientific | 2019 |
| Celectro Limited | Professional & scientific | 2016 |
| Central Joinery Services Limited | Manufacturing | 1981 |
| Central Support Technologies Limited | Information & communication | 1995 |
| CFS Advisory Ltd | Information & communication | 2017 |
| CGX Group Ltd | Information & communication | 2022 |
| Chainbrick Limited | Hospitality | 2001 |
| Chalfont Accountants Ltd | Professional & scientific | 2014 |
| Chalfont Construction Limited | Construction | 2017 |
| Chalfont Crafts & Design Ltd | Manufacturing | 2019 |
| Chalfont Decor Ltd | Professional & scientific | 2025 |
| Chalfont Electrical Services Limited | Construction | 2007 |
| Chalfont Energy Solutions Ltd | Construction | 2021 |
| Chalfont Exploration Ltd | Professional & scientific | 2016 |
| Chalfont Heights Roads Committee Limited | Households | 2009 |
| Chalfont Home & Hobby Store Ltd | Wholesale & retail | 2013 |
| Chalfont Mews Management Company Limited | Real estate | 2008 |
| Chalfont Park Sports Association Limited | Arts & recreation | 1999 |
| Chalfont Products Limited | Wholesale & retail | 1991 |
| Chalfont Property Investment Limited | Households | 2022 |
| Chalfont Shutters Ltd | Professional & scientific | 2025 |
| Chalfont Stores Limited | Wholesale & retail | 2018 |
| Chalfont Trading Ltd | Wholesale & retail | 2021 |
| Chalfont Trees Ltd | Administrative & support | 2021 |
| Chalfonts Consulting Limited | Professional & scientific | 2007 |
| Chambers Psychology Ltd | Health & social care | 2022 |
| Chaney Lifts Limited | Manufacturing | 2002 |
| Chaney Properties Limited | Real estate | 2024 |
| Chapter Consulting Limited | Professional & scientific | 2023 |
| Chapter Two Productions Ltd | Information & communication | 2011 |
| Charles Berkshire Group Ltd | Real estate | 2023 |
| Charlotte Holmes Ltd | Other services | 2018 |
| Charmouth Lodge Residents Association Limited | Professional & scientific | 1961 |
| Charnwood Property Services Ltd | Real estate | 2023 |
| Charter One Group Limited | Professional & scientific | 1998 |
| Charterhouse Mercantile Properties Limited | Real estate | 1987 |
| Chatswood Consulting Limited | Information & communication | 2017 |
| Chef ZHU Ltd | Hospitality | 2016 |
| Chelsea Paris Limited | Manufacturing | 2011 |
| Chem Arrow Europe Limited | Manufacturing | 2013 |
| Chenda Trading Ltd | Wholesale & retail | 2025 |
| Chequers Hotel Operations Ltd | Hospitality | 2024 |