| M3 Macmil Music | United States | — | Original Production |
| Machine Shop Recordings | — | — | — |
| Mad Science Recordings | United States | — | — |
| Mad Science Records | United States | — | Original Production |
| Madeindizuit | France | — | Production |
| Maghz Records | — | January 10, 2021 | Production |
| Magic Calm | Germany | — | Original Production |
| Magma | France | 2011 | Production |
| Magnum Publishing | France | — | — |
| Main 2 Maitre Productions | France | July 1, 2006 | Imprint |
| Maison Closed | France | March 18, 2014 | Production |
| Makaveli | United States | — | Imprint |
| Makaveli Records | United States | — | Bootleg Production |
| Make It or Break It Videos | — | — | Bootleg Production |
| Make It Rain Records | Canada | December 15, 2016 | Imprint |
| Makhno | France | — | Production |
| MalykMusic | United Kingdom | October 10, 2020 | Original Production |
| Mandril Musique | — | March 26, 2019 | Imprint |
| Mass Appeal | United States | 2014 | — |
| Mass Appeal Records | — | — | — |
| Massive Rockerz Entertainment Music Publishing | — | May 12, 2014 | Publisher |
| Maximo Group Network | — | April 25, 2012 | Publisher |
| Maxximize Records | — | — | — |
| Maybach Music Group | — | — | — |
| Mekslow Inc. | France | — | Production |
| Mello Music Group | — | 2007 | Original Production |
| Mellotron Records | — | — | Imprint |
| Melodiya | — | — | — |
| Melting Pot Music | — | — | Original Production |
| Memoir Music | Netherlands | — | Original Production |
| Menace Records | France | — | Original Production |
| Menart Records | — | — | — |
| Meow Gang Soul Co. | — | December 2, 2022 | Distributor |
| Mercury Records | United States | 1945 | Imprint |
| Metahood Records | France | July 13, 2022 | — |
| Metal Mind Productions | — | — | — |
| Mezoued Records | France | January 16, 2009 | — |
| MG Records | France | — | Production |
| Mic Theory Records | United States | — | Original Production |
| Midget Records | United Kingdom | — | Original Production |
| Midnight Glow | — | 2023 | Original Production |
| Milfhunter Records | — | March 1, 2014 | Distributor |
| Milfranc Suisse | Switzerland | 2015 | Production |
| Militant Muzik | — | January 10, 2001 | Original Production |
| Millennium Jazz Music | United Kingdom | 2003 | Original Production |
| Million Entertainement | — | 2025 | Original Production |
| Mis Associés | France | — | Production |
| Misère Records | France | — | Original Production |
| Mix Records | — | — | Production |
| MKK | — | 2016 | Production |
| MNRK Music Group | — | — | — |
| Mo Thugs Records | United States | — | — |
| Mo Wax | United Kingdom | 1992 | Original Production |
| Mod Joe Records | — | October 21, 2020 | Original Production |
| Modern Records | — | — | — |
| MoneyHouse LLC | — | — | Publisher |
| Moneyicegangent | United States | April 23, 2015 | Distributor |
| Monstercat | — | July 1, 2011 | Original Production |
| Motown | United States | September 1959 | Original Production |
| Mpiima Music Records | — | February 20, 2020 | Distributor |
| Murdafunk | — | — | Imprint |
| Music for Nations | — | — | — |
| Music From the Corner | United Kingdom | — | Original Production |
| Music High Court | United States | August 24, 2017 | Imprint |
| Music Online Mafia Inc. | United States | March 4, 2016 | Production |
| Music That Moves | — | — | Original Production |
| Musica Studios | — | — | — |
| Musicgenre | — | — | Original Production |
| Mutombo Records | — | 2020 | Original Production |
| Muzikos herojai | — | December 7, 2017 | Publisher |
| Máximo Records | — | February 10, 2012 | Publisher |