A List Music Ltd

A Songs (Anglo Plugging Music)

popular

Accorder Music Ltd

popular

Alan Simmons Music

classical

Alarcon Music Limited

popular

Alex Tronic Music Publishing

Alfred Publishing Co (UK) Ltd

popular, classical

All-Media Music Ltd

popular

Amphonic Music Ltd

library

Anglia Music Company

popular

Angus Publications

popular

Annie Reed Music Ltd

popular

Ariel Music

classical

Artful Production Music

library

Ashley Mark Publishing Company - A Division of Summerfield Musical Instruments Ltd

popular, classical

Associated Board of the Royal Schools of Music (Publishing) Ltd

classical

Associated Music International Ltd

popular

Asterisk Music

Astute Music Ltd

Audio Network plc

popular, classical