REPURCHASE OF OWN SHARES

Ahlstrom Corporation

STOCK EXCHANGE ANNOUNCEMENT

September 27, 2011

Date: September 27, 2011
Exchange transaction: Buy
Share class: AHL1V
Amount: 2000
Average price /share: 12.6786 EUR
Highest price /share: 12.7000 EUR
Lowest price /share: 12.5000 EUR
Total price: 25,357.20 EUR

The shares held by Ahlstrom Corporation on September 27, 2011
AHL1V            23,605

Ahlstrom Corporation

On behalf of Ahlstrom           

Pasi Väisänen

EVLI BANK PLC