Top Sonova execs resign after investigation

STAFA, SWITZERLAND—The hearing aid industry was rocked by the unexpected resignations of the three top executives of the Sonova Group, the world’s largest manufacturer of hearing aids. Sonova, parent company of Phonak, Unitron, and Lyric, announced on March 30 that Valentin Chapero, the CEO, and Oliver Walker, the CEO, had tendered their resignations, and that…

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