DGAP-DD: AIXTRON SE english

Notification concerning transactions by persons performing managerial responsibilities pursuant to section 15a of the WpHG Directors' Dealings notification transmitted by DGAP - a company of EquityStory AG. The person with duty of notification is solely responsible for the content of this announcement. --------------------------------------------------------------------------- Details of the person subject to the disclosure requirement Company: SBG Beteiligung GmbH Person performing managerial responsibilities, triggering the disclosure requirement for the legal person Details of the person performing managerial responsibilities Position: Member of an administrative or supervisory body Information about the transaction with duty of notification Description of the financial instrument: Shares ISIN/WKN of the financial instrument: DE000A0WMPJ6 Type of transaction: Sale Date: 23.05.2011 Price: 26.53 Currency: EUR No. of items: 89604 Total amount traded: 2377194.10 Place: Frankfurt außerbörslich / over the counter Information about the company with duty of publication Issuer: AIXTRON SE Kaiserstr. 98 52134 Herzogenrath Deutschland ISIN: DE000A0WMPJ6 WKN: A0WMPJ End of Directors' Dealings Notification (c) DGAP 29.05.2011 DGAP Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases. Media archive at www.dgap-medientreff.de and www.dgap.de ID 13327

Our registered trademarks: AIXACT®, AIXTRON®, Atomic Level Solutions®, Close Coupled Showerhead®, CRIUS®, EXP®, EPISON®, Gas Foil Rotation®, Optacap™, OVPD®, Planetary Reactor®, PVPD®, STExS®, Trijet®