| Claremont (Sunningdale) Management Company Limited | Administrative & support | 2007 |
| Clarity for Growth Limited | Professional & scientific | 2025 |
| Clarks Security Gates Ltd | Administrative & support | 2012 |
| Cleft Financial Services Limited | Professional & scientific | 2018 |
| Clevedon Developments Limited | Professional & scientific | 1973 |
| Clevedon Investment Limited | Extraterritorial | 1948 |
| Client Centric Estate Solutions Ltd | Other services | 2018 |
| Climb High Ltd | Wholesale & retail | 2023 |
| Clive House Petty France Limited | Real estate | 2025 |
| Cloud Property Services Ltd | Real estate | 2018 |
| CM Spittle Property Services Ltd | Construction | 2013 |
| CMR Team 27 Limited | Wholesale & retail | 2024 |
| CN Assets Limited | Real estate | 2024 |
| CN Finance PLC | Professional & scientific | 2006 |
| CN Nominees Limited | Professional & scientific | 1979 |
| CN Properties Limited | Real estate | 1974 |
| CN Secretarial Limited | Households | 2006 |
| Coaching Difference Ltd | Education | 2026 |
| Coaching Xchange Ltd | Education | 2023 |
| Coastwater Limited | Professional & scientific | 2007 |
| Cobham Joinery Limited | Construction | 2010 |
| Cochlear Europe Limited | Health & social care | 1999 |
| Cochlear Research and Development Limited | Health & social care | 2003 |
| Cocoon Realty Ltd | Real estate | 2022 |
| Coffee & Lounge Limited | Real estate | 2023 |
| Commercio Tech Limited | Information & communication | 2019 |
| Complete Post Production Ltd | Information & communication | 2019 |
| Compton Court (Bexhill) Limited | Administrative & support | 1999 |
| Concept Builders Surrey Ltd | Construction | 2013 |
| Conifer Ventures Limited | Administrative & support | 2016 |
| Connor the Gangsman Limited | Transport & logistics | 2019 |
| Construct Scenery Productions Limited | Information & communication | 2025 |
| Construction Projects Surrey Ltd | Construction | 2024 |
| Convo Zone Limited | Education | 2023 |
| Cool and Collected Ltd | Wholesale & retail | 2025 |
| Cool Electrics Limited | Professional & scientific | 2012 |
| Cooper&Son Roofing Services Ltd | Construction | 2020 |
| Copper Ville Limited | Construction | 2014 |
| Coral Vision Holdings Limited | Financial services | 2018 |
| Coral Vision Limited | Information & communication | 2017 |
| Corfe Bears Limited | Wholesale & retail | 2007 |
| Corhampton Media Limited | Professional & scientific | 2011 |
| Corporate Environmental Built Engineering Services Ltd | Manufacturing | 2003 |
| Corthian Enterprises Limited | Financial services | 2019 |
| Cosmic Rays Ltd | Wholesale & retail | 2024 |
| Country Landscape Contractors Limited | Administrative & support | 2024 |
| Courtlands Manor Road Limited | Administrative & support | 2005 |
| Coworth Construction Ltd | Construction | 2021 |
| Cozyhead Ltd | Wholesale & retail | 2024 |
| CPC Enterprises Limited | Construction | 2018 |
| Craft My Passion Ltd | Construction | 2017 |
| Crafted Futures Ltd | Administrative & support | 2023 |
| Craftline Woodworks Ltd | Construction | 2025 |
| Craggan Consulting Services Limited | Information & communication | 2017 |
| CRC Southeast Ltd | Other services | 2010 |
| Creative Concepts GCB Ltd | Construction | 2013 |
| Creepers Limited | Professional & scientific | 1990 |
| Cresdrive Engineering Limited | Manufacturing | 2003 |
| Cresilience Limited | Professional & scientific | 2024 |
| Crest (Claybury) Limited | Construction | 1986 |
| Crest A2D (Walton Court) LLP | | 2016 |
| Crest Developments Limited | Professional & scientific | 1964 |
| Crest Estates Limited | Professional & scientific | 1962 |
| Crest Homes (Eastern) Limited | Professional & scientific | 1952 |
| Crest Homes (Midlands) Limited | Professional & scientific | 1984 |
| Crest Homes (Nominees NO.2) Limited | Professional & scientific | 1988 |
| Crest Homes (Nominees) Limited | Professional & scientific | 1983 |
| Crest Homes (Northern) Limited | Professional & scientific | 1955 |
| Crest Homes (South East) Limited | Professional & scientific | 1967 |
| Crest Homes (South West) Limited | Professional & scientific | 2004 |
| Crest Homes (South) Limited | Professional & scientific | 1967 |
| Crest Homes (Wessex) Limited | Professional & scientific | 1985 |
| Crest Homes (Westerham) Limited | Professional & scientific | 1967 |
| Crest Homes Limited | Professional & scientific | 2000 |
| Crest Manhattan Limited | Professional & scientific | 1979 |
| Crest Nicholson (Bath) Holdings Limited | Professional & scientific | 2004 |
| Crest Nicholson (Chiltern) Limited | Professional & scientific | 1978 |
| Crest Nicholson (Eastern) Limited | Professional & scientific | 1985 |
| Crest Nicholson (Epsom) Limited | Construction | 2007 |
| Crest Nicholson (Henley-On-Thames) Limited | Construction | 1999 |
| Crest Nicholson (Highlands Farm) Limited | Professional & scientific | 2007 |
| Crest Nicholson (Londinium) Limited | Professional & scientific | 1973 |
| Crest Nicholson (Midlands) Limited | Professional & scientific | 1978 |
| Crest Nicholson (Peckham) Limited | Real estate | 2010 |
| Crest Nicholson (South East) Limited | Professional & scientific | 1967 |
| Crest Nicholson (South West) Limited | Professional & scientific | 1964 |
| Crest Nicholson (South) Limited | Professional & scientific | 1985 |
| Crest Nicholson (Stotfold) Limited | Construction | 2013 |
| Crest Nicholson (Wheatley) LLP | | 2020 |
| Crest Nicholson Bioregional Quintain Limited Liability Partnership | | 2006 |
| Crest Nicholson Developments (Chertsey) Limited | Professional & scientific | 2003 |
| Crest Nicholson Holdings PLC | Professional & scientific | 2009 |
| Crest Nicholson Operations Limited | Construction | 1974 |
| Crest Nicholson Pension Trustee Limited | Professional & scientific | 2017 |
| Crest Nicholson PLC | Professional & scientific | 1972 |
| Crest Nicholson Projects Limited | Professional & scientific | 1963 |
| Crest Nicholson Properties Limited | Professional & scientific | 1956 |
| Crest Nicholson Regeneration Limited | Professional & scientific | 1969 |
| Crest Nicholson Residential (London) Limited | Professional & scientific | 2000 |
| Crest Nicholson Residential (Midlands) Limited | Professional & scientific | 1960 |