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Casia Publishing Company
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Casio
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CD Sheet Music
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Centerstream Publications
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Century Music
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Chant du Monde
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Chanterelle
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Chappell
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Charles Colin Publishing
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Cherry Classics Music
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Cherry Lane Music
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Chester Music
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Chocolate Cake Productions
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Chordbuddy Media
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Choristers Guild
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Christina de Beus
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Christopher Wiggins
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Chronicle Books
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Cimarron Music Press
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Classical Vocal Reprints
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Claude T. Smith Publications
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Cloud Microphones
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Colgrass Music
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Colla Voce Music
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Collins Drama
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Collins Music
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Colne Edition
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Columbia Music Company
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Combre
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Comus Edition
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Concordia Publishing House
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Consolidated Music Publishers
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Contemporary A Cappella Publishing
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Conway Editions
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Cool Jazz
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Cor Publishing
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Corda Music Publications
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Country Music Hall of Fame
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Countryside Music
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CPI
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Crabtree Music Publications
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Cramer Music
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Cranz
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Creative Concepts
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Criterion
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Cross Harp Press
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Curnow Music
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Currency Press
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Curwen Edition
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CVLS