Data
- Act Entertainment AG Basel
- Festival Strings Lucerne
- Pro Senectute Kanton Luzern
- argovia philharmonic
- GC Events Sagl
- Alegria Konzert GmbH
- Good News Productions AG Glattpark
- Culture Communication GmbH
- Euroconcerts Suisse Sarl
- ENCORE! Entertainment AG
- Konzertbüro Augsburg GmbH
- Festival Strings Lucerne - Daniel Dodds