Preliminary percentage of subscription rights exercised in Infineon’s capital increase is 96.7 percent

Neubiberg, Germany – August 3, 2009 – Infineon Technologies AG reports the preliminary percentage of subscription rights exercised in the announced capital increase. With this figure currently standing at 96.7 percent, presumably at least 322 million shares will be issued to holders of subscription rights at a subscription price of Euro 2.15 per share. The gross proceeds from the capital increase will presumably amount to at least Euro 692 million. The remaining shares, up to approximately 15 million (less any additional shareholders’ subscription declarations received in the course of the day), can be subscribed by a fund managed by Apollo Global Management LLC. This corresponds to approximately 1.4 percent of Infineon’s increased share capital totaling Euro 2.173 billion, assuming the capital increase is fully placed. Infineon expects the decision of the Apollo-managed fund no later than during the afternoon tomorrow. Infineon expects trading in the shares issued through the exercise of subscription rights to begin on the Frankfurt Stock Exchange on Friday, August 7, 2009. Disclaimer Infineon Technologies AG has filed a registration statement (including a prospectus) with the U.S. Securities and Exchange Commission (“SEC”) for the offering to which this communication relates. Before you invest, you should read that registration statement (including the prospectus) for more complete information about Infineon and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov or on Infineon’s website at www.infineon.com by clicking “Investor”. Alternatively, Infineon will arrange to send you the prospectus if you request it by calling +49-89-234-26655 or emailing investor.relations@infineon.com. In Germany, this publication constitutes neither a prospectus, nor an offer to sell nor a solicitation of an offer to buy securities of Infineon, and it is not a substitute for the prospectus. The offer of shares of Infineon in Germany is being made solely by means of, and on the basis of, a securities prospectus. An investment decision regarding the publicly offered securities of Infineon in Germany should only be made on the basis of the securities prospectus. A securities prospectus which has been approved by the German Federal Financial Supervisory Authority has been published and is available free of charge on Infineon’s website (www.infineon.com).

About Infineon Infineon Technologies AG, Neubiberg, Germany, offers semiconductor and system solutions addressing three central challenges to modern society: energy efficiency, communications, and security. In the 2008 fiscal year (ending September), the company reported sales of Euro 4.3 billion with approximately 29,100 employees worldwide in continuing operations. With a global presence, Infineon operates through its subsidiaries in the U.S. from Milpitas, CA, in the Asia-Pacific region from Singapore, and in Japan from Tokyo. Infineon is listed on the Frankfurt Stock Exchange (ticker symbol: IFX) and in the USA on the over-the-counter market OTCQX International Premier (ticker symbol: IFNNY).