Maecenas Music

classical

Maria Forte Music Services

popular

Marionet Music

Marsden Music Publishing Company

popular

Maxwood Music Ltd

popular

Mbop Publishing Ltd

popular

Mcasso Music Production Ltd

popular

Mediatracks Music Library

library

Mel Bay Music Ltd

popular, classical

Menace Music Ltd

popular

Mere Folk

popular

Meriden Music

classical

Micropress Music

classical

Modrana Music Publishers Ltd

classical

Moggie Music Ltd

popular

Moncur Street Music Ltd

popular

MPL Communications Ltd

popular

Mulberry Music Ltd

popular

Multiplay Music Ltd

popular

Music by Design Ltd

popular

Music Exchange (Manchester) Ltd

Music Haven

classical

Music Manic Publishers

popular, library

Music Sales Ltd

popular, classical

MusT

classical

Mute Song Ltd

popular