Stock exchange release

PERLOS CORPORATION SUSPECTED OF NEGLECTING ITS DUTY OF DISCLOSURE

21 September 2007, 15:02 EEST

Fortum Corporation has today been informed about suspicions concerning an alleged delay in Perlos Corporation's profit warning in the turn of the year 2002-2003. The public prosecutor has decided to prosecute Fortum Corporation's CEO Mikael Lilius and certain other members of the Board of Directors of Perlos Corporation in 2002-2003 for having neglected the disclosure duty of the company. Lilius was a member of the Board of Directors of Perlos Corporation from the year 1997 to 2003. Lilius denies the charges as groundless. Fortum Corporation Maria Romantschuk SVP, Corporate Communications Distribution: Helsinki Stock Exchange Key media