Publishers – K
- Kahnt
- Kalmus (Alfred)
- Kalmus (Edwin)
- Kalymi Music
- Kameleon-Editions
- Karthause-Schmülling
- Kavepe Music
- Kawohl Verlag
- KCZB
- KDM Verlag
- Kendor Music Inc.
- Kensington Music
- Kenyon
- Kerrs Music
- Keveren Music Press
- Kevin Mayhew
- Key Music
- Keys-Experts Verlag
- Kidsocado
- Kikkerland
- Kingsway Publications
- Kirklees Music
- Kjos Music Company
- Klarus Musikverlag
- Klavarskribo
- Klavierzwerge Deutschland
- Kleinerts Musikforlag
- Kliment Musikverlag
- Knight Edition
- Knöpferl
- Koala Publications
- Koch Universal Music
- Kodály Institute
- Koen De Wolf
- Kompositor International
- Könemann Music Budapest
- Korea Institute of Piano Pedagogy
- Kossack
- Kral Verlag
- Krijt en Penseel
- Kuhlman
- Kunstfactor
- Kunzelmann
- Kyle Craig Publishing
