Information concerning the intent of a Group Merger of Rücker Aktiengesellschaft onto ATON Engineering AG and the request of ATON to carry out a procedure to exclude the minority shareholders ('Umwandlungsrechtlicher Squeeze Out')

Ad hoc announcement according to § 15 WpHG

Information concerning the intent of a Group Merger of Rücker Aktiengesellschaft (Rücker) onto ATON Engineering AG (ATON) and the request of ATON to carry out a procedure to exclude the minority shareholders ('Umwandlungsrechtlicher Squeeze Out')

ATON has informed Rücker today of the intent to merge Rücker as transferring entity onto ATON in order to simplify the group structure and proposed to enter in negotiations concerning a merger agreement.

ATON has requested that in connection with the merger the remaining shareholders (minority shareholders) of Rücker in accordance with § 62 subparagraph 5 sentence 1 UmwG in conjunction with §§ 327a ff. AktG (squeeze out merger) should be excluded. A draft of the merger agreement will contain a respective clause.

ATON confirms to own about 90.04% of the share capital of Rücker and to be main shareholder in the meaning of § 62 subparagraph 5 sentence 1 UmwG.

The Executive Board of Rücker plans to enter into negotiations with ATON concerning the conclusion of a merger agreement in which connection it is intended to squeeze out the minority shareholders of ATON.

Wiesbaden, May 3, 2013

The Executive Board