Data
- Act Entertainment AG Basel
- Festival Strings Lucerne
- argovia philharmonic
- GC Events Sagl
- Migros-Kulturprozent-Classics
- swiss classics gmbh / Lucerne Chamber Circle
- Good News Productions AG Glattpark
- Maya Classics
- Furler Productions
- Konzertbüro Augsburg GmbH
- ANDO Music Productions GmbH
- Act Entertainment AG Basel