Labels – M
Labels: Magdalen - MPS Records
- Magdalen
- Magpie Records
- Maguelone
- Major Classics
- Malachite
- Malibran
- Manitoba Chamber Orchestra
- Marc Aurel
- Marco Polo
- Marcophon
- Mariinsky
- Mark Records
- Marlboro Recording Society
- Marquis
- Marsyas
- Massimo Giordano
- Masterclass
- Masterclass Media Foundation
- Masters Brass Nagoya
- Masterworks
- Masterworks Broadway
- Material
- Mats Bergstrom Musik
- Mawson and Wareham Music
- Maya Recordings
- McMaster Records
- MDG
- MDR KLASSIK
- Medici Arts
- Medici Classics
- Medici Masters
- Megadisc
- Melba Recordings
- Melodiya
- Membran
- Memoria
- Memorial University
- Memory Lane
- Menuetto Classics
- Mercury
- Mercury Living Presence
- Meridian
- Metier
- Metronome
- Metropolis Group
- Metropolitan Opera
- Meyer Media
- Mezhdunarodnaya Kniga Musica
- MG Music
- Michael Blake Edition
- Michael Nyman Records
- Michael Storrs Music
- MicroFest Records
- Micropress Music
- Mignarda
- Milan
- Milken Archive Digital
- Minabel
- MinMax
- Mirare
- MMB
- MMG
- MN Records
- Mode
- Modesty Music
- Monograph
- Montaigne
- Monthabor Music
- Monument Records
- Moochin About
- Morrison Music Trust
- Moscow State Conservatory
- Moshi Moshi Records
- Motette
- Mótettukór Hallgrímskirkju
- Move Records
- Movieplay
- Mozartiana Classics
- MPR
- MPS Records
Labels: MRC - Myto
- MRC
- MSO Classics
- MSR Classics
- MTG Music
- Multisonic
- Münchner Philharmoniker
- Music & Arts
- Music & Media
- Music Agents Red Label
- Music Brokers
- Musica Ficta
- Musica Omnia
- Musica Rediviva
- Musica Sveciae
- Musical Concepts
- Musicanova
- Musicaphon
- Musicians Showcase
- MusicMasters
- Musiepoca
- Musik Museum
- Musique en Wallonie
- Musiques à la Chabotterie
- Musiques Suisses
- muso
- MV Cremona
- MVE
- Myricae Classics
- Myrios
- Myto