Repurchase of own shares

Ahlstrom Corporation STOCK EXCHANGE RELEASE 9.12.2010 at 17.30 CET
Date: 09 December 2010      
Exchange transaction: Buy    
Share class:    AHL1V
Amount:           2500   
Average price /share:  14.7426           EUR
Highest price /share:   14.8000           EUR
Lowest price /share:   14.7200           EUR
Total price:      36856.50         EUR
The shares held by Ahlstrom Corporation on 09 December 2010    
AHL1V 148458           
AHLSTROM CORPORATION                       
On behalf of Ahlstrom Corporation                
Teemu Koivisto