Artists' Index
| Artist | Group | Instrument/Role |
| Shigeru Kan-no | Piano | |
| Jozef Kapustka | Piano | |
| John Kenny | Trumpet | |
| John Kersey | Celeste, Harpsichord, Organ, Piano, Repetiteur | |
| Prema Kesselman | Flute | |
| adam khan | Guitar | |
| Amit Khaneja | Tenor (voice) | |
| Angela Jia Kim | Piano | |
| Michelle Kim | Piano | |
| Wonkak Kim | Clarinet | |
| Björn Kleiman | Violin | |
| Tim Kliphuis | Violin | |
| Henning-Arfst Klocke | Tenor (voice) | |
| Rudolf Koelman | Violin | |
| Randall Kohl | Composer, Guitar | |
| Kevin Komisaruk | Organ | |
| Tzvetan Konstantinov, CEO | Piano | |
| Spyros Kontos | Oboe | |
| Marcin Kopeć | Baritone (voice) | |
| Pavel Kopecky | Composer | |
| Aglaia Koras | Piano | |
| Jens Korndoerfer | Organ | |
| Slavko Kovacic | Clarinet | |
| Ko Ku |
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