Publishers – M
Publishers: M-Disc - Music Partner
- M-Disc
- M. Baron Company
- M.P. Belaieff
- Maecenas Music
- Magnasoft Publications
- Maker's Press, The
- Maleham Publishing
- Manners McDade
- Mannheim Steamroller
- Mannheimer Musikverlag
- Manual De Falla Ediciones
- Mapa Mundi
- Margun Music
- Mark Fielding
- Mark Foster Music
- Maruka Music
- Mascot Music
- Masquerade Music
- Masterclass Music
- Masters Music Publications
- Matador
- Matthias Hohner
- Maurice River Press
- Max Eschig
- Max Hieber Musikverlag
- Mayas Music
- Mayfair Montgomery Publishing
- MCA Music
- MCS
- McTier Music
- Medaillon Music
- Megido Publications
- Mel Bay Publications
- Melos Musik
- MEM Publications
- MenaceJimenez Publications
- Meredith Music
- Meridian Publishing
- Merion Music
- Metro Gnome Music
- Metropolis Music Publications
- Michael Daugherty Music
- Microsillon
- Mieroprint Musikverlag
- Migdal Publishing
- Milford Trust
- Mimast
- Mimram Music
- Mirasound BV
- Missy Raines
- Mitropa Music
- Mixta Music Publishing
- MK Publishing
- MKT Musikit
- ML Associates
- Modern Drummer Publications
- Modern Part Songs (Bosworth)
- Molenaar
- Moncur
- Montague Music Publishing
- Montem Music
- MorningStar Music Publishers
- Morton Gould
- Möseler Verlag
- MPL Communications
- MT Trust
- MTI
- Multitude of Voyces
- Mundo Arts
- Murphy Method
- Music Box Publications
- Music Company
- Music Exchange
- Music Factory
- Music Garden
- Music Ireland
- Music Marvels
- Music Minus One
- Music Motivation
- Music Partner
Publishers: Music Sales - Mystic Publishing
- Music Sales
- Music Sales Furtados
- Music Score
- Music Vault
- Music70
- Musica Baltica
- Musica Rara
- Musica Russica
- Musicians Institute Press
- Musicians Publications
- Musiciens entre Guerre et Paix
- Musicland
- Musicom
- Musictek
- Musicworks
- Musik & Theater
- Musik Fabrik
- Musik Verlag Bornmann
- Musik Verlag Rappel
- Musikk-Husets Forlag
- Musikverlag Andrea Wiegand
- Musikverlag Bernhard Geiger
- Musikverlag C.F. Schmidt
- Musikverlag Hafner
- Musikverlag Hildner
- Musikverlag Holzschuh
- Musikverlag Josef Preissler
- Musikverlag Richard Stegmann
- Musikverlag Scherbacher
- Musikverlag Vogt & Fritz
- Musikverlag Wolfgang Grünbauer
- Musikverlage Hans Gerig KG
- Musikwissenschaftlicher Verlag
- Musix
- MusT
- Must Have Books
- Mute Song
- Múzicas Editions
- Muziekschool Niwigi
- Muzika
- My World
- Mystic Publishing