| Chaps Electrical Services Ltd | Construction | 2019 |
| Charles Hunt (Holdings) Ltd | Real estate | 2016 |
| Charlotte Bell Consulting Services Ltd | Professional & scientific | 2024 |
| Charlton Investment Properties Limited | Real estate | 2018 |
| Charnwood Place (Rothley) Management Company Ltd | Households | 2019 |
| Charter House Residents Management Company Limited | Households | 2003 |
| Charter Place (Lichfield) Management Company Limited | Households | 2007 |
| Chase Goffs Oak Limited | Construction | 2026 |
| Chase JV Ltd | Real estate | 2019 |
| Chase Pest Control Ltd | Administrative & support | 2012 |
| Chatsworth Mews Management Company Limited | Households | 2004 |
| CHE Pasta Ltd | Manufacturing | 2019 |
| Cheadle Park Limited | Households | 1991 |
| Cheddleton Way Management Company (2005) Limited | Households | 2004 |
| Chells Neighbourhood Centre Management Limited | Construction | 1991 |
| Chelmer Auto Repair Services Ltd | Extraterritorial | 2021 |
| Chelmer Motor Engineers Limited | Wholesale & retail | 2014 |
| Chelmerfields (Chelmsford) Management Company Limited | Households | 1988 |
| Chelsea Fields Management Company Limited | Households | 1996 |
| Cheltenham Limited | Administrative & support | 2004 |
| Chequers Apothecary Limited | Extraterritorial | 2026 |
| Cherry Grove Maintenance Limited | Administrative & support | 2025 |
| Cherry Orchards (PH 1) Management Company Limited | Households | 2006 |
| Cherry Tree House Management Limited | Households | 1988 |
| Cheshire Meat Company (Trafford Park) Limited | Wholesale & retail | 1973 |
| Cheshunt F.C. Limited | Arts & recreation | 2015 |
| Cheshunt Landscapes Limited | Administrative & support | 2010 |
| Chesters Wood Management Company Limited | Households | 2001 |
| Chestnut Court (Winslow) Management Company Limited | Households | 2006 |
| Chestnut Mead Management Limited | Households | 1987 |
| Cheviots Management (Mitcham) Limited(The) | Households | 1986 |
| Chiazza Investment Ltd | Real estate | 2022 |
| Chilcote Management Limited | Households | 1985 |
| Chiltern Place Management Company Limited | Households | 2005 |
| Chilworth Park (Haddenham) Management Company Limited | Households | 2013 |
| Chimney Smart Limited | Extraterritorial | 2026 |
| Chipps Consultancy Ltd | Financial services | 2024 |
| Chips Building Management Company Limited | Households | 2009 |
| Chirp Communications Limited | Professional & scientific | 2013 |
| CHM Owners Limited | Households | 2020 |
| Choisya Accountants Limited | Professional & scientific | 2021 |
| Chorley G 1 Management Company Limited | Households | 2011 |
| Chris D’Arcy Travel Counsellor Limited | Administrative & support | 2019 |
| Chris Waight Consultancy Ltd | Professional & scientific | 2020 |
| Christabel and Sylvia (Manchester) Management Limited | Households | 2005 |
| Christchurch Estates Limited | Real estate | 1979 |
| Christiana Aesthetics and Beauty Limited | Other services | 2025 |
| Christopher Daniels (Lofts) Limited | Construction | 2012 |
| Christopher's Property Management Ltd | Real estate | 2018 |
| Chrysalis Coaching Limited | Professional & scientific | 2001 |
| Church Gardens Management Company Limited | Households | 2022 |
| Church Hollow (Purfleet) Management Company Limited | Households | 2004 |
| Church View (Leyland) Management Company Limited | Households | 2011 |
| Churchfield Cars Limited | Transport & logistics | 2020 |
| Churchill Place (Sevenoaks) Management Company Limited | Households | 2000 |
| Cinar Food & Wine Limited | Wholesale & retail | 2014 |
| Cinar Food Store Limited | Wholesale & retail | 2014 |
| Citicoms Voice and Data Limited | Information & communication | 2013 |
| City Capital Markets Limited | Other services | 2008 |
| City Fields (East Wakefield) Management Company Limited | Households | 2020 |
| City Group Contractors Ltd | Construction | 2023 |
| City Heights Apartments (Leicester) Management Company Limited | Households | 2020 |
| City Reach Apartments Limited | Households | 1997 |
| Cityscape Steel Erectors Limited | Construction | 2026 |
| CJ8 Developments Ltd | Real estate | 2022 |
| Cjebuild Ltd | Construction | 2019 |
| CK Autos - Carey & Kyprianou Ltd | Wholesale & retail | 2025 |
| Claddagh Ltd | Administrative & support | 2016 |
| Clarence Fields Management Company Limited | Households | 2019 |
| Clark & Mccarthy Limited | Construction | 2021 |
| Clarkes (Hillingdon) Management Company Limited | Households | 1986 |
| Clarkson Developments Ltd | Construction | 2018 |
| Classique Conservation Ltd | Construction | 2020 |
| Claude Lyons Limited | Manufacturing | 2023 |
| Clayton Grange Management Company Limited | Households | 2005 |
| Clear Peak Vantage Ltd | Professional & scientific | 2026 |
| Clear Vision Window Cleaning Solutions Ltd | Administrative & support | 2024 |
| Clearstream Residents Association Limited | Households | 1983 |
| Clegg Electrical Ltd | Construction | 2026 |
| Clements Wharf Residents Management Company Limited | Households | 2006 |
| Clementsbury Management Company Limited | Households | 2001 |
| Cleta Petunia Studio Ltd | Manufacturing | 2023 |
| Cleve House Freehold Limited | Households | 1998 |
| Click 'N' Lick Ltd | Wholesale & retail | 2017 |
| Clickexpose Ltd | Administrative & support | 2023 |
| Clik 4 Print Limited | Information & communication | 2013 |
| Clippers Reach (Grays) Management Company Limited | Households | 2001 |
| Clock Tower (Wolverhampton) Management Company Limited | Households | 2020 |
| Clockhouse Nursery Limited | Agriculture & fishing | 2005 |
| Clocktower Lodge Limited | Hospitality | 2007 |
| Clocktower Management Company (Liverpool) Limited | Real estate | 2017 |
| Clonboy Limited | Wholesale & retail | 1976 |
| Clothing Partner Ltd | Manufacturing | 2023 |
| Cloudforce IT Ltd | Information & communication | 2013 |
| Clovelly Court (West Drayton) Management Company Limited | Households | 2014 |
| CLP Financial Solutions Ltd | Financial services | 2024 |
| CLS Contracts Limited | Construction | 2010 |
| CLT Media Limited | Professional & scientific | 2021 |
| CMD25 Ltd | Transport & logistics | 2026 |
| Cmgs Solutions Limited | Financial services | 2013 |