PSI Withdraws about 1.8 Percent of Shares

Share buy-back continues depending on market situation

Berlin, 20 January 2009 – Based on the resolution by the Annual General Meeting on 25 April 2008, the Executive Board of PSI AG has decided on and initiated the retraction of 212,870 own shares. This corresponds to about 1.76 percent of the present subscribed capital. Thereby the PSI AG subscribed capital is reduced from 31,008,947.20 Euros (corresponding to 12,112,870 no-par shares with a calculated nominal value of 2.56 Euros) to 30,464,000.00 (corresponding to 11,900,000 no-par shares with a calculated nominal value of 2.56 Euros). PSI bought back a total of 211,116 own shares at an average value of 3.17 Euros in the fourth quarter of 2008.

With the retraction of the shares the result per share will be further improved. In view of the good liquidity, the well-running operational business and the very good cash flow from operating activities, PSI will buy back additional shares should the stock market again go through a weak period and will possibly also withdraw these shares.

PSI AG develops and integrates complete solutions, on the basis of its own software products, for the management of energy networks (electricity, gas, oil, heat, water), cross-company production management (metals, automotive, mechanical engineering, logistics) and infrastructure management for telecommunications, transport and safety. PSI was founded in 1969 and employs 1,100 persons in the group.