| Cleanco Ventures LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2019 |
| Coastal Delight Fine Food and Drinks UK LimitedCrawley, United Kingdom · UKcoastaldelight.co.uk · checked 28 Oct 2026 | UK | 1 | – | – | – | – | 2021 |
| Comojo LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1993 |
| Compass Contract Services LtdRubery, Birmingham, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1987 |
| Consolidated Contractors International LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1985 |
| Constantine LimitedUnited Kingdom · UKconstantinewines.com · checked 28 Oct 2026 | UK | 1 | – | – | –Premium (producers) | 12% | 1969 |
| Consulate General of the Czech RepublicPraha, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2023 |
| Content Liverpool LtdLiverpool, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2018 |
| Cook Industries LtdPlymouth, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2014 |
| Coravin UK LtdIpswich, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2021 |
| Cork & Vine Company LtdIlfracombe, United Kingdom · UKcorkandvine.shop · checked 28 Oct 2026 | UK | 1 | – | – | –Value (producers) | 14% | 2023 |
| Corking Wines LimitedYork, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2003 |
| Cornwallis LimitedTipton, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1986 |
| Coroin LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2004 |
| Cosmetic Doctor At Work LtdMarylebone, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2004 |
| Cosmicplanet LtdCambridge, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2025 |
| Cosmos Catering LtdBasildon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2016 |
| Cotoyon Direct LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2025 |
| Craft Clubs LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2015 |
| Craigfield LtdWickford, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2011 |
| Cranstons Quality Butchers LtdCumbria, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1928 |
| Credit Suisse InternationalLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1990 |
| Crest Jmt Leather LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2009 |
| Crowthorne Hi-Tec ServicesFleet, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1986 |
| Crozier Scott LtdWarrington, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2019 |
| Ctc Europe.com LtdAddlestone, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1999 |
| Cyprofood LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2007 |
| Cyrano LtdBraintree, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1998 |
| D F Warehouses LtdCrawley, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1972 |
| D and M Winchester LtdElgin, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2004 |
| D e Bespoke LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2015 |
| Da Rocchio Ristorante Italiano LtdLeeds, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2007 |
| Daniel Carnio LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2018 |
| Daniel Thwaites PLCBlackburn, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1897 |
| Danliv Leisure LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2019 |
| Datatek LtdManchester, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2011 |
| David Shuttle LtdBeaconsfield, United Kingdom · UKdavidshuttle.com · checked 28 Oct 2026 | UK | 1 | – | – | – | – | 1984 |
| Davies Group LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2008 |
| Davies Turner PLCColeshill, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1890 |
| Davis Polk & Wardwell London LLPNew York, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2022 |
| Days & Years LtdWembley, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2025 |
| Dcu LtdWinchester, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2017 |
| De Montfort Fine Art LtdLichfield, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1989 |
| Deakin and Francis LimitedBirmingham, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1919 |
| Dear Productions LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2018 |
| Debonair Building Maintenance LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2014 |
| Deep Fresh Drinks LimitedLeeds, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2019 |
| Delivering Happiness LimitedWokingham, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2016 |
| Dellavita LtdNorthampton, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2025 |
| Denbies Wine Estate LimitedDorking, United Kingdom · UKdenbies.co.uk · checked 28 Oct 2026 | UK | 1 | – | – | – | – | 2015 |