Ahlstrom Corporation STOCK EXCHANGE ANNOUNCEMENT 19 February 2010 REPURCHASE OF OWN SHARES Date: 19 February 2010 Exchange transaction: Buy Share class: AHL1V Amount: 2000 Average price /share: 11,66250 EUR Highest price /share: 11,70000 EUR Lowest price /share: 11,65000 EUR Total price: 23325,00 EUR The shares held by Ahlstrom Corporation on 19 February 2010 AHL1V 27657 AHLSTROM CORPORATION On behalf of Ahlstrom Corporation Pasi Väisänen EVLI BANK PLC