Siegfried: Mandatory Convertible Bond Completely Converted

Zofingen, May 6, 2011 -- Siegfried issued a 5% mandatory convertible bond due 2011 on April 26, 2010. All outstanding notes of the original issue amount of 80 million Swiss Francs were converted by the maturity date, May 5, 2011. Consequently, Siegfried Holding AG’s issued share capital now amounts to 3,800,000 registered shares at a par value of two Swiss Francs.

For further information:

Peter Gehler, Head Corporate Center

peter.gehler@siegfried.ch

Tel. +41 (0)62 746 11 48

Mobile +41 (079) 416 41 16

Fax +41 (0)62 746 11 03

Siegfried Holding AG

Untere Brühlstrasse 4

CH-4800 Zofingen

Tel. +41 (0)62 746 11 11

Fax +41 (0)62 746 11 03

www.siegfried.ch

About Siegfried

Active in Life Science markets, the Siegfried Group is a global manufacturer of pharmaceutical products with produc- tion facilities located in Switzerland, Malta and the USA. At the end of 2010, Siegfried employed approximately 700 employees and achieved annual sales of CHF 314 million. Siegfried Holding AG is listed on the Swiss Exchange in Zurich (SIX: SFZN).

Siegfried is active in both the primary and secondary production of drugs. The company develops and manufactures active pharmaceutical ingredients for the research-based pharmaceutical industry as well as the corresponding inter- mediate steps and standard products, and provides development and production services for drugs in finished dos- age forms.

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