Publishers – M
Publishers: M-Disc - MorningStar Music Publishers
- M-Disc
- M. Baron Company
- M.P. Belaieff
- Maecenas Music
- Magnasoft Publications
- Maker's Press, The
- Maleham Publishing
- Manhattan Beach Music
- Manners McDade
- Mannheim Steamroller
- Mannheimer Musikverlag
- Mansarda Sintra
- Manual De Falla Ediciones
- Manufacturing Waltons
- Mapa Mundi
- Margun Music
- Mark Foster Music
- Mark Wessels Publications
- Martin & Co Guitars
- Martin Schmid Blechbläsernoten
- Maruka Music
- Mascot Music
- Masquerade Music
- Masterclass Music
- Matador
- Matthias Hohner
- Maurice River Press
- Max Eschig
- Max Hieber Musikverlag
- Mayas Music
- Mayfair Montgomery Publishing
- MBI Publishing Company
- MCA Music
- McCoy's Horn Library
- MCS
- McTier Music
- MDH Musikverlag
- Medaillon Music
- Mega Pop
- Megido Publications
- Mel Bay Publications
- Mela Music
- Melos Musik
- MEM Publications
- MenaceJimenez Publications
- Menschenkinder Verlag
- Meredith Music
- Meridian Publishing
- Merion Music
- Merseburger Verlag
- Metro Gnome Music
- Metropol Verlag
- Metropolis Music Publications
- Michael Bellmann Musikverlag
- Michael Daugherty Music
- Michlbauer Harmonikawelt
- Microsillon
- Mieroprint Musikverlag
- Migdal Publishing
- Mighty Bright
- Milford Trust
- Mimast
- Mimram Music
- Mirasound BV
- Missing Method
- Missy Raines
- Misterioso Editions
- Mitropa Music
- Mixta Music Publishing
- MK Publishing
- MKT Musikit
- ML Associates
- Moden Piano School Axel Kemper-Moll
- Modern Drummer Publications
- Modern Part Songs (Bosworth)
- Molenaar
- Moncur
- Montague Music Publishing
- Montem Music
- MorningStar Music Publishers
Publishers: Morton Gould - Musikverlag Ortus
- Morton Gould
- Mosch Musikverlag
- Möseler Verlag
- Mountain Peak Music
- MPL Communications
- MT Trust
- MTI
- Mülirad-Verlag
- Müller & Schade
- Multitude of Voyces
- Mundo Arts
- Murphy Method
- Music Box Publications
- Music Bridge Publications
- Music Company
- Music Exchange
- Music Factory
- Music for Kids
- Music Garden
- Music Ireland
- Music Marvels
- Music Minus One
- Music Notables
- Music Partner
- Music Plaza (Bos Agy)
- Music Sales
- Music Sales Furtados
- Music Score
- Music Vault
- Music70
- Musica Baltica
- Musica Practica
- 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
- Musikforlag Cantando
- Musikk-Husets Forlag
- Musikverlag Abel
- Musikverlag Alexander Mayer
- Musikverlag Andrea Wiegand
- Musikverlag Andrea Wiegand
- Musikverlag Andreas Josephs
- Musikverlag Art Syrinx
- Musikverlag Bauer
- Musikverlag Bernd Katzbichler
- Musikverlag Bernhard Geiger
- Musikverlag Bruno Uetz
- Musikverlag Bühler + Edition Tenare
- Musikverlag C.F. Schmidt
- Musikverlag Chili Notes
- Musikverlag Cornelia Schaborak
- Musikverlag Dali
- Musikverlag Frank
- Musikverlag Franz Suppan
- Musikverlag Goldbach Baumbach
- Musikverlag H. H. - Hubert Hoche
- Musikverlag Hafner
- Musikverlag Harald Burger
- Musikverlag Hildner
- Musikverlag Hochstein
- Musikverlag Holzschuh
- Musikverlag Horst Rapp
- Musikverlag Josef Preissler
- Musikverlag Karl Edelmann
- Musikverlag Leuckart
- Musikverlag Maltzahn
- Musikverlag Mendieta
- Musikverlag Notensender
- Musikverlag Olli Hinke
- Musikverlag Ortus
Publishers: Musikverlag Rainer Schottstädt - Mystic Publishing
- Musikverlag Rainer Schottstädt
- Musikverlag Raisch
- Musikverlag Ralf Jung
- Musikverlag Renk
- Musikverlag Richard Stegmann
- Musikverlag Scherbacher
- Musikverlag Schwenk
- Musikverlag Seebach Records
- Musikverlag Siegfried Rundel
- Musikverlag Steer
- Musikverlag Synergon
- Musikverlag Tatzer
- Musikverlag Thomas Erler
- Musikverlag Varner
- Musikverlag Violaviva
- Musikverlag Vogt & Fritz
- Musikverlage Hans Gerig KG
- Musikverlags Zaunschirm
- Musikwissenschaftlicher Verlag Wien
- Musix
- MusT
- Mute Song
- Múzicas Editions
- Muziekschool Niwigi
- Muziekuitgeverij De Orgelpijp
- Muziekuitgeverij IZIS
- Muziekuitgeverij Wagenaar
- Muzika
- MXR
- Mystic Publishing
