Sonova execs quit over share sale

The three top managers at Swiss group Sonova, the world’s biggest hearing aid maker, have quit after a probe into executive share sales ahead of a recent profit warning. Chairman Andy Rihs, chief executive Valentin Chapero and chief financial officer Oliver Walker are all stepping down after executives sold shares or options earlier this month, Sonova said yesterday, sending its shares down 12 per cent. The statement sparked concerns a leadership crisis may hit the company.