Sonova Holding AG: Sonova announces changes to its Board of Directors Sonova announces changes to its Board of Directors Stäfa (Switzerland), February 11, 2021 - Sonova Holding AG, a leading provider of hearing solutions, announces today that its Board of Directors has nominated Greg Behar and Roland Diggelmann as new Board members for election at the next Annual General Meeting (AGM) in June 2021. At the same time, Beat Hess, Vice Chair and member of the Board of Directors since 2012, will retire from his position for age reasons. In addition, Michael Jacobi will not stand for re-election a...