Ad hoc announcement according to § 15 WpHG, secunet Security Networks AG: Chairman of the Supervisory Board, Dr Ottenberg, steps down

[Essen, 20 June 2013] Dr Karsten Ottenberg, Chairman of the Supervisory Board at secunet Security Networks AG – a leading German provider of sophisticated IT security and IT security partner to the Federal Republic of Germany – has resigned from his role as Chairman of the Supervisory Board and his seat on the Supervisory Board at secunet Security Networks AG with effect from 19 July 2013. Dr Ottenberg's resignation follows his withdrawal from the Management Board at majority shareholder Giesecke & Devrient GmbH on 30 June 2013.