Vaisala - Changes in company's own shares

SHARE REPURCHASE 22.5.2012

Helsinki, Finland, 2012-05-22 17:30 CEST (GLOBE NEWSWIRE) -- 

Vaisala Corporation       ANNOUNCEMENT       22.5.2012
SHARE REPURCHASE  22.5.2012                           
In the Helsinki Stock Exchange                        
Trade date                       22.5.2012            
Bourse trade              Buy                         
Share                     VAIAS                       
Amount                               1.000  Shares    
Total cost                       15.175,00  EUR       
Average price/ share               15,1750  EUR       
Highest price/ share                 15,20  EUR       
Lowest price/ share                  15,15  EUR       
Vaisala Corporation now holds a total of 17.000 shares
including the shares repurchased on 22.5.2012.        
On behalf of Vaisala Corporation                      
Nordea Bank Finland Plc                               
Petri Simberg             Julius Summanen