Ahlstrom - Changes in company's own shares

REPURCHASE OF OWN SHARES

Ahlstrom                                                    
STOCK EXCHANGE ANNOUNCEMENT                                 
23 September 2011                                           
REPURCHASE OF OWN SHARES                                    
Date:                                 23 September 2011     
Exchange transaction:                 Buy                   
Share class:                          AHL1V                 
Amount:                                            2000     
Average price /share:                           12,3942  EUR
Highest price /share:                           12,4700  EUR
Lowest price /share:                            12,1000  EUR
Total price:                                   24788,40  EUR
The shares held by (COMPANY NAME) on  23 September 2011     
AHL1V                                             21005     
Ahlstrom                                                    
On behalf of Ahlstrom                                       
Pasi Väisänen                                               
EVLI BANK PLC