Ahlstrom Corporation STOCK EXCHANGE ANNOUNCEMENT 02 March 2010 REPURCHASE OF OWN SHARES Date: 02 March 2010 Exchange transaction: Buy Share class: AHL1V Amount: 5000 Average price /share: 11.99790 EUR Highest price /share: 12.11000 EUR Lowest price /share: 11.89000 EUR Total price: 59989.50 EUR The shares held by Ahlstrom Corporation on 02 March 2010 AHL1V 45814 AHLSTROM CORPORATION On behalf of Ahlstrom Corporation Pasi Väisänen EVLI BANK PLC