Vaisala - Changes in company's own shares

SHARE REPURCHASE 21.5.2012

Helsinki, Finland, 2012-05-21 17:37 CEST (GLOBE NEWSWIRE) -- 

Vaisala Corporation       ANNOUNCEMENT       21.5.2012
SHARE REPURCHASE  21.5.2012                           
In the Helsinki Stock Exchange                        
Trade date                       21.5.2012            
Bourse trade              Buy                         
Share                     VAIAS                       
Amount                                 300  Shares    
Total cost                        4.590,00  EUR       
Average price/ share               15,3000  EUR       
Highest price/ share                 15,30  EUR       
Lowest price/ share                  15,30  EUR       
Vaisala Corporation now holds a total of 16.000 shares
including the shares repurchased on 21.5.2012.        
On behalf of Vaisala Corporation                      
Nordea Bank Finland Plc                               
Petri Simberg             Julius Summanen