T. Rowe Price Associates holds less than 3% of Sonova Holding AG

Staefa (Switzerland), March 5, 2013 - According to the article 20 of the Swiss Stock Exchange Act, Sonova Holding AG announces that T. Rowe Price Associates, Inc., 100 East Pratt Street, Baltimore, MD 21202 USA, holds less than 3% of total capital and voting rights as of February 27, 2013 due to a sale of shares.

Contact person at T. Rowe Price Associates:

Ryan Nolan, Vice President & Legal Counsel, T.Rowe Price Associates, Inc.

100 East Pratt Street

Baltimore, MD 21202 USA

Phone: +1 410 345 6618, Fax: +1 410 345 20 35

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