Joint Supplementary Statement in accordance with Section 27 (1) of the Securities Acquisition and Takeover Act concerning the voluntary public takeover offer (cash offer) by NTT Communications Deutschland GmbH

Integralis AG / Strategic business decision

Ad hoc announcement in accordance with Section 15 of the Securities Trading Act

On September 10 2009 NTT Communications Deutschland GmbH (NTT Com) announced a
change of the public takeover offer to the shareholders of Integralis AG. The change was due
to a lowering of minimum acceptance level to 50 percent plus one share of the diluted
outstanding share basis of 11,175,032 Integralis shares. The acceptance period therefore
extends by another two weeks, until September 25 (24.00 CET).

The Management Board and the Supervisory Board of Integralis AG take the view that the
Amendment removes the last condition of the Offer which has yet to be met and therefore
also removes any potential uncertainties concerning the success and the completion of the
Offer. Therefore, both the Management and Supervisory Boards furthermore recommend
that the shareholders of Integralis AG accept the voluntary public takeover offer (cash offer)
announced by NTT Communications Deutschland GmbH.

Link to the "Joint Supplementary Statement of the Management Board and Supervisory Board"

Contact:
Integralis AG (Investor Relations)
Peter Banholzer
Tel.: +49 89 945 73 178
ir@integralis.com
peter.banholzer@integralis.com
www.integralis.com

About Integralis AG
As a leading international provider of IT security solutions, Integralis offers its customers skilled consulting and bespoke solutions for protecting their critical business processes. Incorporating leading technologies, skills, experience and strategic partnerships, the Integralis product portfolio is targeted at planning, implementing and operating enterprise-wide information security architectures. With its structured methodical and technical
consulting and implementing services, the Integralis consulting team supports customers' IT security projects. Integralis offers its customers multilingual support in the ongoing operation of their security systems all around the world on a 7/24 basis. The range of services comprises a telephone hotline, remote monitoring and administration as well as on-site support. With a global network of branches, Integralis serves a large
number of bluechip companies, government authorities and many national and international enterprises. Integralis AG is listed in Deutsche Börse AG’s Prime Standard. With 511 employees, it generated revenues of EUR 169 million in 2008. Further information on Integralis is available on the Internet at www.integralis.com.