Ahlstrom Corporation STOCK EXCHANGE ANNOUNCEMENT 03 March 2010 REPURCHASE OF OWN SHARES Date: 03 March 2010 Exchange transaction: Buy Share class: AHL1V Amount: 3200 Average price /share: 12.18780 EUR Highest price /share: 12.25000 EUR Lowest price /share: 12.18000 EUR Total price: 39000.96 EUR The shares held by Ahlstrom Corporation on 03 March 2010 AHL1V 49014 AHLSTROM CORPORATION On behalf of Ahlstrom Corporation Pasi Väisänen EVLI BANK PLC