Lone Pine Capital LLC and its subsidiaries hold 4.660% of Sonova Holding AG

Stäfa (Switzerland), 08.06.2011 - According to the article 20 of the Swiss Stock Exchange Act, Sonova Holding AG announces that Lone Pine Capital LLC and its subsidiaries¹, 2 Greenwich Plaza, Greenwich, 06830, Connecticut, USA, hold 3,099,647 registered shares with a par value of CHF 0.05 as of June 1, 2011 due to sale of securities. This corresponds to 4.660% of total capital and voting rights.

Contact person at Lone Pine Capital LLC: Jeffrey Wechselblatt, phone: +1 203 618 7826, fax: +1 203 552 3826.

¹Subsidiaries of Lone Pine Capital LLC:

Lone Cypress, Ltd.

2 Greenwich Plaza, Greenwich, Connecticut 06830

United States of America

Lone Spruce, L.P.

2 Greenwich Plaza, Greenwich, Connecticut 06830

United States of America

Lone Balsam, L.P.

2 Greenwich Plaza, Greenwich, Connecticut 06830

United States of America

Lone Sequoia, L.P.

2 Greenwich Plaza, Greenwich, Connecticut 06830

United States of America

Lone Kauri, Ltd.

2 Greenwich Plaza, Greenwich, Connecticut 06830

United States of America

Lone Cascade, L.P.

2 Greenwich Plaza, Greenwich, Connecticut 06830

United States of America

Lone Monterey Master Fund, Ltd.

2 Greenwich Plaza, Greenwich, Connecticut 06830

United States of America

Lone Sierra, L.P.

2 Greenwich Plaza, Greenwich, Connecticut 06830

United States of America

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