Ahlstrom Corporation STOCK EXCHANGE ANNOUNCEMENT 04 November 2010 REPURCHASE OF OWN SHARES Date: 04 November 2010 Exchange transaction: Buy Share class: AHL1V Amount: 2000 Average price /share: 14.7294 EUR Highest price /share: 14.7500 EUR Lowest price /share: 14.7100 EUR Total price: 29458.80 EUR The shares held by Ahlstrom Corporation on 04 November 2010 AHL1V 81000 AHLSTROM CORPORATION On behalf of Ahlstrom Corporation Teemu Koivisto EVLI BANK PLC