Stock exchange release

Fortum's stake in Lenenergo increases

29 September 2005, 17:06 EEST

Fortum Corporation STOCK EXCHANGE RELEASE 29 September 2005

Fortum's stake in Lenenergo increases Fortum's shareholding in Russian power company OAO Lenenergo is increased by 0.4 percentage points of voting shares. This is a result of Fortum's buy out offer of July 29th 2005 made to all shareholders of common shares of Lenenergo. Fortum received 2,699,259 common shares, and currently owns altogether 230 million common shares of the company. Total amount paid by Fortum is approximately 81 million RUR (approximately 2.4 MEUR at the current exchange rate) with the offer price of RUR 30 (approximately 0.87 EUR) per share. Fortum Corporation Carola Teir-Lehtinen Senior Vice President, Corporate Communications For more information: Tapio Kuula, Senior Vice President, +358 10 452 4112 Irina Grave, Vice President, +7 812 449 8384 Distribution: Helsinki Stock Exchange Key media