Directors’ Dealings | 17 April 2007 16:42

DGAP-DD: QSC AG 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 Last name: Ruberg First name: David Function: Member of an administrative or supervisory body Information about the transaction with duty of notification Description of the financial instrument: QSC shares ISIN of the financial instrument: DE0005137004 Type of transaction: Exercise of Convertible Bonds Date: 10.04.2007 Price: 1.00 Currency: EUR No. of items: 10000 Total amount traded: 10000.00 Place: Explanation for publication: Sale of shares within the framework of the 2002 stock option program Information about the company with duty of publication Issuer: QSC AG Mathias-Brüggen-Str. 55 50829 Köln Germany ISIN: DE0005137004 WKN: 513700 Index: TecDAX End of Director’s Dealings Notification (c)DGAP 17.04.2007 The registration of this notification was carried out on http://www.dd-meldung.de or http://www.directors-dealings.de ID 1999