Ahlstrom Corporation STOCK EXCHANGE ANNOUNCEMENT 10 February 2010 REPURCHASE OF OWN SHARES Date: 10 February 2010 Exchange transaction: Buy Share class: AHL1V Amount: 6000 Average price /share: 10,99580 EUR Highest price /share: 11,00000 EUR Lowest price /share: 10,95000 EUR Total price: 65974,80 EUR The shares held by Ahlstrom Corporation on 10 February 2010 AHL1V 6000 AHLSTROM CORPORATION On behalf of Ahlstrom Corporation Pasi Väisänen EVLI BANK PLC