Micronas will in future purchase shares for its stock option program on the stock exchange (0529)

The Board of Directors of Micronas Semiconductor Holding AG has resolved the following amendment to its stock option program: shares to be delivered based on options granted after January 1, 2006, will not anymore be made available from the conditional capital but purchased on the stock exchange.

Micronas Semiconductor Holding AG therefore intends to buy each year around 300 000 of its registered shares (ISIN: CH0012337421) on the SWX Swiss Exchange.

The Micronas Group is a leading independent supplier of innovative, application-specific semiconductor solutions for consumer and automotive electronics. Its shares are listed on the SWX Swiss Exchange and on the Prime Standard segment (TecDax) in Frankfurt.

Zurich, October 31, 2005