| Cherry Vegas Ltd | Wholesale & retail | 2026 |
| Cherry Wood Property Limited | Real estate | 2024 |
| Chew Valley Limited | Other services | 2004 |
| Chichester Court (Hope Cove) Limited | Hospitality | 1997 |
| Chinese Antiques Limited | Wholesale & retail | 2023 |
| Chocolate Treat Club Limited | Extraterritorial | 2015 |
| Chris Watts Building & Maintenance Limited | Construction | 2003 |
| Chucks Wood Ltd | Agriculture & fishing | 2023 |
| Church-Ford Mortgages Ltd | Financial services | 2021 |
| Cider Barn Projects Ltd | Financial services | 2026 |
| City Liner Ltd | Financial services | 2018 |
| Cityforum Limited | Administrative & support | 1991 |
| Civil Engineering Estimating Services Limited | Professional & scientific | 2025 |
| Civils Store Group Limited | Financial services | 2020 |
| Civils Store Limited | Wholesale & retail | 2012 |
| CL Traditional Masonry Ltd | Construction | 2017 |
| Clifton Block Management Ltd | Real estate | 2015 |
| Clifton Canvas Developments Limited | Manufacturing | 1997 |
| Clifton Harmony Limited | Real estate | 2016 |
| Climate Fintech Limited | Other services | 2019 |
| Coastholme Holiday Park Limited | Administrative & support | 2015 |
| Coastview Limited | Professional & scientific | 1986 |
| Cognique Limited | Professional & scientific | 2007 |
| Coiner Ltd | Information & communication | 2025 |
| Coldharbour Farm Solar Park Limited | Energy | 2015 |
| Colin Brown Crop Care Limited | Administrative & support | 2008 |
| Community Art Chapel CIC | Arts & recreation | 2024 |
| Community Bloom Ltd | Professional & scientific | 2024 |
| Community Habitat Limited | Professional & scientific | 2019 |
| Company Formation Services Limited | Information & communication | 2017 |
| Conlin HV Jointing & Fibre Ltd | Information & communication | 2026 |
| Consumer Buyers (Finance) Limited | Extraterritorial | 1973 |
| Consumer Buyers Limited | Wholesale & retail | 1971 |
| Cookin Pixels Limited | Information & communication | 2023 |
| Coole Knight Developments Ltd | Real estate | 2024 |
| Cosmic Shapes Ltd | Professional & scientific | 2024 |
| Cottage TDL 2020 Ltd | Real estate | 2006 |
| Country Oak Furniture Ltd | Manufacturing | 2004 |
| Court Farm Barns Limited | Construction | 2024 |
| Covesea Renewables Limited | Energy | 2025 |
| Coward DJ Ltd | Hospitality | 2023 |
| Craigo Glenskinno Renewables Limited | Energy | 2024 |
| Craneking Limited | Construction | 2013 |
| Cranmore Tower Foundation Limited | Real estate | 2015 |
| Crannog Steele Limited | Construction | 2015 |
| Creations of Avalon Ltd | Manufacturing | 2025 |
| Crusader Windows (Wessex) Limited | Construction | 2002 |
| Crystal Fresh Limited | Wholesale & retail | 2003 |
| Curb Appeal - LEE Tuxford Ltd | Administrative & support | 2022 |
| Custom Idea Ltd | Professional & scientific | 2006 |
| D E Floors Ltd | Construction | 2022 |
| D&C Elevators Limited | Manufacturing | 2012 |
| D. Stacey & SON Limited | Wholesale & retail | 2010 |
| D.T. Service and Trading Ltd | Construction | 2024 |
| Dacre Capital Advisors LLP | | 2011 |
| Daedalus Development Company Limited | Construction | 2021 |
| Daedalus Waterfront Management Company Limited | Real estate | 2026 |
| Dalmandel Ltd | Health & social care | 2017 |
| Damson Park Associates Limited | Real estate | 2016 |
| Dartmouth Castle Tearooms Ltd | Hospitality | 2016 |
| Data Standards Limited | Information & communication | 2002 |
| David a Graham Associates Limited | Administrative & support | 2006 |
| Davis-Weaver Landscaping Limited | Administrative & support | 2017 |
| DCF Motors Ltd | Wholesale & retail | 2025 |
| DCM Property & Events Management Ltd | Households | 2026 |
| Dcypher Limited | Information & communication | 2026 |
| DDC Management Co Ltd | Construction | 2022 |
| Dean Street Farm Estate Management Limited | Real estate | 2021 |
| Dean Street Farm Management Limited | Real estate | 2021 |
| Debbie Bellinger School of Dance Limited | Arts & recreation | 2013 |
| Delamore Renewables Limited | Energy | 2025 |
| Della Valle Architects Ltd | Professional & scientific | 2010 |
| Dengie Solar Park Limited | Energy | 2022 |
| Dentanet Ltd | Health & social care | 2021 |
| Detox Retreats Ltd | Other services | 2006 |
| Dexicon Consulting Ltd | Information & communication | 2018 |
| Dibble Agri Ltd | Agriculture & fishing | 2023 |
| Dogdaddies Ltd. | Other services | 2015 |
| Doulting Stone Quarry Limited | Mining & quarrying | 2018 |
| Dragonflies and Swallows Limited | Extraterritorial | 2013 |
| Drama Direct Limited | Education | 2008 |
| Drawing Matters Limited | Wholesale & retail | 1997 |
| Dream Weavers Collective CIC | Professional & scientific | 2024 |
| Drumclune Renewables Limited | Energy | 2025 |
| Druston Limited | Construction | 2023 |
| DRY Paws International Ltd | Health & social care | 2016 |
| DS Electrical Installations (SW) Ltd | Construction | 2022 |
| Dsimai Ltd | Professional & scientific | 2024 |
| Dugan Global Consultancy Ltd | Professional & scientific | 2025 |
| Dulcote Limited | Extraterritorial | 2011 |
| Durston Construction Ltd | Construction | 2003 |
| Dw.Dg.Son Limited | Health & social care | 2022 |
| E & S Plant and Machinery Limited | Wholesale & retail | 2022 |
| E.R.K. Investment Limited | Financial services | 2014 |
| EAT for Health Limited | Education | 2019 |
| Eco Food Creations Ltd | Agriculture & fishing | 2020 |
| Ecophoria Ltd | Financial services | 2024 |
| Eden Grove Management Company Limited | Households | 1977 |
| Eggman Global Ltd | Information & communication | 2021 |
| Electro Chemical Propulsion CME Limited | Manufacturing | 2025 |