Ahlstrom Corporation STOCK EXCHANGE ANNOUNCEMENT 09 March 2010 REPURCHASE OF OWN SHARES Date: 09 March 2010 Exchange transaction: Buy Share class: AHL1V Amount: 6800 Average price /share: 12.40000 EUR Highest price /share: 12.40000 EUR Lowest price /share: 12.40000 EUR Total price: 84320.00 EUR The shares held by Ahlstrom Corporation on 09 March 2010 AHL1V 61800 AHLSTROM CORPORATION On behalf of Ahlstrom Corporation Teemu Koivisto EVLI BANK PLC