| Macdonald & Muir LimitedEdinburgh, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1936 |
| Mace LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1989 |
| Macfarlane's LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1988 |
| Macintyre Scott & Co LtdEdinburgh, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1933 |
| MacWineServicesUnited Kingdom · macwineservices.com · checked 13 Oct 2026 | | – | 40 | France, Austria, SpainCoteaux Champenois, Chablis | –Premium (producers) | 33% | – |
| Madame F LimitedLondon, United Kingdom · UKmadamef.com · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2024 |
| Made In Oldstead LtdYork, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2020 |
| Madeera Wines LtdEmsworth, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2019 |
| Madeira London LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2015 |
| Maharaja Drinks Emporium LimitedOxford, United Kingdom · UKmaharajadrinks.com · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2022 |
| Maidenhead Wine Company LimitedMaidenhead, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2002 |
| Mail Boxes Etc LtdWarwick, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1995 |
| Maison Estelle LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2017 |
| Maison Ferrand UK LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2015 |
| Maison Maurice LtdGravesend, United Kingdom · UKmaisonmaurice.co.uk · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 1977 |
| Maisons Marques et Domaines LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1985 |
| Majestic International Freight Forwarding LtdDover, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1991 |
| Majestic Wine Warehouses LtdWatford, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1981 |
| Majik Wine LtdLincoln, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| Malcouk LtdWinchester, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2006 |
| Mallams LtdKidlington, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1997 |
| Malta Tourism AuthorityRicasoli, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2022 |
| Maltby & Greek Wholesale LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2013 |
| Maltravers Jam LimitedBognor Regis, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| Mama's Way LimitedReading, United Kingdom · UKmamasway.co.uk · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2020 |
| Mamba Logistics LimitedStoke D'Abernon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| Mammafiore UK LimitedLondon, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Manchester Tennis & Racquet Club LimitedSalford, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2016 |
| Mandarin Oriental Hyde ParkLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1996 |
| Mangia Mangia LtdLondon, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Mangrove Global LimitedWoodford Green, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2013 |
| Manicomio LimitedEdgware, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2000 |
| Manley Wines UK LimitedRichmond, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Mann Fine Wine LtdChorley, United Kingdom · UKmannfinewine.com · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| Manor Park Drinks LtdChislehurst, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2014 |
| Maramia LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2007 |
| Marani Wines LtdLondon, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Marathon Food LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1986 |
| Marble & Granite Services LtdHigh Wycombe, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2010 |
| Marc Cain GMBHUnited Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Marcato Direct LimitedLoughborough, United Kingdom · UKmarcatodirect.co.uk · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2014 |
| Maree Wine LtdWellingborough, United Kingdom · UKmareewine.com · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2025 |
| Maremma LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2017 |
| Margetts Fund Management LimitedBirmingham, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2001 |
| Margiotta LimitedNewbridge, United Kingdom · UKmargiotta.co.uk · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 1979 |
| Maria Khan LtdLondon, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Marinaged Wines LtdLondon, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Marion Trading LimitedBirmingham, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2018 |
| Mark Thompson Lifesciences LtdBishop Auckland, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2015 |
| Market Vendr LimitedGrimsby, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2012 |