Publishers – K
- Kahnt
- Kalmus (Alfred)
- Kalmus (Edwin)/Luck's Music
- Kameleon-Editions
- Karthause-Schmülling
- Kavepe Music
- KCZB
- KDM Verlag
- Kendall/Hunt Publishing Co
- Kendor Music Inc.
- Kenyon
- Kerrs Music
- Keveren Music Press
- Kevin Mayhew
- Key Music
- Keys-Experts Verlag
- Kikkerland
- King's Music
- Kingsway Publications
- Kinmor
- Kirklees Music
- Kjos Music Company
- Klarinetschool Paula Crasborn-Mooren
- Klarus Musikverlag
- Klavarskribo
- Kleinerts Musikforlag
- Kliment Musikverlag
- Knight Edition
- Koala Publications
- Koch Universal Music
- Kodály Institute
- Koen De Wolf
- Kompositor International
- Könemann Music Budapest
- Kossack
- Kral Verlag
- Krijt en Penseel
- Kuhlman
- Kunstfactor
- Kunzelmann
- Kyle Craig Publishing
