| Chaffinch Asset Management Limited | Real estate | 2018 |
| Charltons Heating & Plumbing Ltd | Construction | 2017 |
| Chartts Ltd | Construction | 2024 |
| Checkmate Central LLP | | 2006 |
| Checkmate Consulting LLP | | 2006 |
| Checkmate Lifting LLP | | 2006 |
| Checkmate Limited | Financial services | 2020 |
| Checkmate Management Services Limited | Professional & scientific | 1974 |
| Checkmate Seaenergy Limited | Professional & scientific | 2007 |
| Checkmate Trustees Limited | Administrative & support | 2021 |
| Checkmate UK Limited | Manufacturing | 1976 |
| Chemworth Ltd | Wholesale & retail | 2013 |
| Cherished Services Limited | Administrative & support | 2025 |
| Cherry Garden Nursery Ltd | Wholesale & retail | 2015 |
| Chesterfield WT Consultants EOT Limited | Financial services | 2026 |
| Chesterfield WT Consultants Ltd | Professional & scientific | 2010 |
| Church Mews (Sissinghurst) Management Company Limited | Households | 2016 |
| Cians Cards Ltd | Wholesale & retail | 2026 |
| Clare Langdon Interiors Ltd | Manufacturing | 2018 |
| Clarity IT Ltd | Construction | 2017 |
| Clark & Hanson Construction Kent Ltd | Construction | 2025 |
| Clarke's Glazing Limited | Construction | 2016 |
| Claygate Aviation Limited | Financial services | 2023 |
| Claygate Farms (Spratsbourne) Limited | Agriculture & fishing | 2021 |
| Claygate Limited | Real estate | 2015 |
| Cleaning Magic Ltd | Administrative & support | 2019 |
| Clearops Consulting Ltd | Professional & scientific | 2026 |
| Click for Carers Ltd | Administrative & support | 2025 |
| Climate Wines Limited | Wholesale & retail | 2025 |
| Cobalt Asset Management LLP | | 2013 |
| Cobb Alexander Limited | Health & social care | 2005 |
| Cockpit Communications Ltd | Wholesale & retail | 2020 |
| Coffee-Boys Coffee Limited | Manufacturing | 2020 |
| Colossal Roofing Ltd | Construction | 2018 |
| Command AV Limited | Information & communication | 2019 |
| Community Active CIC | Arts & recreation | 2026 |
| Company Data Storage Limited | Administrative & support | 2001 |
| Comsoft Direct Limited | Information & communication | 1993 |
| Conditor Property Enhancements Limited | Construction | 2026 |
| Conditor Property Investments Ltd | Real estate | 2025 |
| Condor ASL Ltd | Transport & logistics | 2021 |
| Conin Records Limited | Information & communication | 2022 |
| Connect 27 Limited | Construction | 2015 |
| Connect Tech Limited | Administrative & support | 2018 |
| Connectorly Limited | Information & communication | 2023 |
| Connolly Leather Limited | Manufacturing | 2021 |
| Coopers Creative Ltd | Construction | 2026 |
| Coppings Properties Limited | Real estate | 2004 |
| Coram Consult Ltd | Professional & scientific | 2015 |
| Core Beauty Group Limited | Wholesale & retail | 2026 |
| Cortec (MRS) Ltd | Water & waste | 2018 |
| Cosgrove Building Limited | Construction | 2019 |
| Counselling in Practice Limited | Education | 2015 |
| Countrywise Agencies Limited | Wholesale & retail | 2019 |
| Courir Ltd | Real estate | 2001 |
| Courtlands Property Limited | Real estate | 2023 |
| Coverseal by Alfresco Pools Ltd | Extraterritorial | 2021 |
| Coxeter Consulting Ltd | Professional & scientific | 2020 |
| Cranbrook Auction Rooms Limited | Wholesale & retail | 1998 |
| Cranbrook Education Ltd | Education | 2024 |
| Cranbrook Golf Club Limited | Real estate | 1969 |
| Cranbrook Iron Ltd | Manufacturing | 2019 |
| Cranbrook Rugby and Cricket Club Limited | Arts & recreation | 2016 |
| Cranbrook School Academy Trust | Education | 2011 |
| Cranbrook Sports Club | Arts & recreation | 2016 |
| Cranbrook Tyre & Performance Limited | Wholesale & retail | 2016 |
| Cranbrook Vets Limited | Professional & scientific | 2025 |
| Crane House Gardens Management Limited | Households | 2001 |
| Crane Interactive Ltd | Information & communication | 2017 |
| Craneheath Securities Limited | Professional & scientific | 1997 |
| Creative Outdoor Rooms Ltd | Other services | 2015 |
| Crookes Consultancy Services Limited | Professional & scientific | 2012 |
| Crouch Design Ltd | Construction | 2015 |
| Crowngate Developments Limited | Construction | 1999 |
| Crownpost Management Ltd | Agriculture & fishing | 2024 |
| Crucible Commodities Advisory UK Ltd | Professional & scientific | 2021 |
| Crucible Investments LLP | | 2025 |
| Crusader Leasing Limited | Wholesale & retail | 1994 |
| Cunningham Gardens Ltd | Administrative & support | 2021 |
| Currency Point Ltd | Professional & scientific | 2024 |
| Cushion Covers Ltd | Wholesale & retail | 2025 |
| CUT 2 the Chase Productions Limited | Information & communication | 2007 |
| CX74 Limited | Information & communication | 2025 |
| D P Hyder Contractors Ltd | Manufacturing | 2025 |
| D&L Property Group Ltd | Real estate | 2022 |
| D.M. Spreyer Holdings Limited | Financial services | 2020 |
| Daccapo Pizzeria Ltd | Hospitality | 2023 |
| Daisies in Bloom Limited | Wholesale & retail | 2016 |
| Daisyjames Property Partnership Limited | Real estate | 2017 |
| Damax CRG Limited | Construction | 2019 |
| DAN Goldsmith Photography Limited | Professional & scientific | 2005 |
| Daniel LEE Investments Limited | Information & communication | 2016 |
| Darrach Limited | Professional & scientific | 2008 |
| Dashfield Coaching and Development Limited | Administrative & support | 2004 |
| David Deakins Limited | Construction | 2002 |
| David Huskisson Associates Limited | Administrative & support | 1993 |
| David Joseph Consulting Limited | Professional & scientific | 2007 |
| David Joseph Consulting Management Ltd | Real estate | 2026 |
| Davis (Hawkhurst) Limited | Professional & scientific | 1986 |
| Dayspring Enterprises Limited | Wholesale & retail | 2004 |