Micronas successfully completes share offering (031212)

Embargoed / not for release in the United States, Canada, Japan or Australia

Micronas announces today that the total offering size has been fixed at 4,150,000 registered shares and that its Rights Offering and Global Offering were priced at CHF 53.00 per registered share (CHF 1 nominal value each). In the Rights Offering, approximately 2.2 million registered shares were subscribed for by existing shareholders, while 1.9 million registered shares were offered in the Global Offering. In addition, Micronas has granted Credit Suisse First Boston an over-allotment option to purchase an additional 455,000 registered shares. This option may be exercised at any time within 30 days after the first trading date.

After the capital increase, the share capital of Micronas amounts to CHF 31,072,480 divided into 31,072,480 shares with a nominal value of CHF 1 each (or CHF 31,527,480 divided into 31,527,480 shares if the over-allotment option is exercised in full).

The payment and settlement date is on Wednesday, December 17, 2003.

The new shares will be fungible with the currently outstanding registered shares of Micronas and will be eligible for trading on the SWX Swiss Exchange as of Friday, December 12, 2003. Application has also been made for the new shares to be listed in the Prime Standard segment (TecDAX) in Frankfurt.

Credit Suisse First Boston is acting as lead manager and bookrunner of the Rights Offering and the Global Offering.

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, December 12, 2003 Micronas Semiconductor Holding AG