| Cotex Holdings Ltd | Financial services | 2022 |
| Cotex Insulation Services Ltd | Professional & scientific | 2009 |
| Cotswold Grove Management Company Limited | Households | 2020 |
| Cottmar Limited | Hospitality | 2025 |
| Cotton Legend Limited | Wholesale & retail | 1997 |
| Country Crafters Ltd | Wholesale & retail | 2023 |
| County Drains Leicester Ltd | Administrative & support | 2003 |
| Coupco Trading Ltd | Wholesale & retail | 2011 |
| Couture Hosiery Ltd | Manufacturing | 2026 |
| Coval Cargo Transport Ltd | Transport & logistics | 2025 |
| CPD Commercial Finance Consulting Limited | Financial services | 2005 |
| CPR CIC | Information & communication | 2026 |
| Crafty Corner Limited | Wholesale & retail | 2010 |
| Craighill Distribution Ltd | Transport & logistics | 2010 |
| Crane and Walton LLP | | 2012 |
| Crkt Properties Ltd | Real estate | 2022 |
| Croft Car Boot Limited | Extraterritorial | 2015 |
| Croft Catering Limited | Hospitality | 2012 |
| Cross Stitch UK Ltd | Wholesale & retail | 2020 |
| Crossbourne Construction Limited | Extraterritorial | 1981 |
| Crosspoint Motor Company Ltd | Wholesale & retail | 2005 |
| Crown Line Property Developments Limited | Hospitality | 2005 |
| Crown Wharf Residents’ Management Company Limited | Households | 2025 |
| Crowndale Food Services Limited | Hospitality | 2002 |
| Crowns Commercials & Campers Limited | Wholesale & retail | 2020 |
| Crusher Manganese Steels Limited | Real estate | 2017 |
| Ctsmiles Ltd | Information & communication | 2026 |
| Cube Distribution Limited | Information & communication | 2006 |
| Cubitt Design Ltd | Professional & scientific | 2010 |
| Cumberland Auto Care Limited | Wholesale & retail | 2019 |
| Cumbrian Lodge Hotel Ltd | Hospitality | 2021 |
| Current Innovations Limited | Construction | 2025 |
| Custom Content Limited | Professional & scientific | 2014 |
| Cyber Warder Ltd | Information & communication | 2024 |
| Cyclofix Ltd | Wholesale & retail | 2025 |
| Cyprinus Limited | Administrative & support | 2020 |
| D & DM Bircher Transport Limited | Transport & logistics | 2001 |
| D and C PUB Group Ltd | Hospitality | 2025 |
| D B Wallace Properties Ltd | Real estate | 2024 |
| D Button Electrical Ltd | Manufacturing | 2015 |
| D K Commercial Vehicle Repairs Ltd | Wholesale & retail | 2014 |
| D M Industries Ltd | Extraterritorial | 2021 |
| D N R Mots Ltd | Wholesale & retail | 2024 |
| D Peters Contracting Limited | Construction | 2004 |
| D&S Designs Store Ltd | Wholesale & retail | 2023 |
| D.A.D Engineering Services Ltd | Professional & scientific | 2023 |
| D.I. Zuchowski Transport Ltd. | Administrative & support | 2015 |
| D.S. Electrical (Leicester) Ltd | Construction | 2008 |
| DAC Midlands Properties Limited | Real estate | 2023 |
| Daedalus Aviation (Services) Limited | Other services | 2009 |
| Daedalus Solutions Ltd | Information & communication | 2025 |
| Daffern Building Limited | Real estate | 2021 |
| Dandelion Trade Services Ltd | Construction | 2025 |
| Daniel Dennis Media Ltd | Professional & scientific | 2023 |
| Dansflore Limited | Construction | 2023 |
| Dantech Solutions Ltd | Information & communication | 2023 |
| Darcie Mae's Ltd | Hospitality | 2025 |
| Darlington Property Holdings Ltd | Households | 2017 |
| Darren Tarry Ltd | Construction | 2023 |
| Dasuna Properties Ltd | Real estate | 2025 |
| Dataneo Ltd | Information & communication | 2025 |
| Davenport Cooling Services Limited | Construction | 2020 |
| David Barrs & Company Limited | Construction | 1978 |
| David Hitchcock Limited | Professional & scientific | 2006 |
| David Lloyd Glazing Solutions Ltd | Construction | 2026 |
| David Wilson Estates Limited | Extraterritorial | 1984 |
| David Wilson Homes (Anglia) Limited | Administrative & support | 1979 |
| David Wilson Homes (East Midlands) Limited | Extraterritorial | 1973 |
| David Wilson Homes (Home Counties) Limited | Extraterritorial | 1982 |
| David Wilson Homes (North Midlands) Limited | Extraterritorial | 1982 |
| David Wilson Homes (Northern) Limited | Extraterritorial | 1973 |
| David Wilson Homes (South Midlands) Limited | Extraterritorial | 1983 |
| David Wilson Homes (Southern) Limited | Extraterritorial | 1983 |
| David Wilson Homes (Western) Limited | Extraterritorial | 1979 |
| David Wilson Homes Land (NO 10) Limited | Construction | 2006 |
| David Wilson Homes Land (NO 11) Limited | Construction | 2006 |
| David Wilson Homes Land (NO 13) Limited | Construction | 2006 |
| David Wilson Homes Land (NO 14) Limited | Construction | 2006 |
| David Wilson Homes Land (NO 15) Limited | Construction | 2006 |
| David Wilson Homes Limited | Construction | 1964 |
| David Wilson Homes Services Limited | Extraterritorial | 1979 |
| David Wilson Homes Yorkshire Limited | Construction | 1978 |
| Davies Education Consultancy Ltd | Education | 2026 |
| Dawodu Empire Limited | Wholesale & retail | 2021 |
| Day & Night Care Services Limited | Health & social care | 2019 |
| Dazvac Services Limited | Manufacturing | 2024 |
| DB Furnishings Ltd | Wholesale & retail | 2024 |
| DCA Property Investment Ltd | Real estate | 2016 |
| Deacon Access Solutions Ltd | Construction | 2022 |
| Dean James Building Solutions Limited | Construction | 2022 |
| Decal Delight by MIA Ltd | Manufacturing | 2023 |
| Decorfresh Projects Limited | Construction | 1993 |
| Deeluxe Products Ltd | Wholesale & retail | 2026 |
| Delhi Transport Limited | Transport & logistics | 2023 |
| Dental Interiors Ltd | Construction | 2011 |
| Deol Haulage Ltd | Transport & logistics | 2018 |
| Derby Motor Boat Club Limited(The) | Arts & recreation | 1963 |
| Desirable Car Limited | Wholesale & retail | 2010 |
| Destacada Ltd | Agriculture & fishing | 2013 |
| Devil Delights Ltd | Manufacturing | 2013 |