VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 21.7.2015 SHARE REPURCHASE 21.7.2015 In the Helsinki Stock Exchange Trade date 21.7.2015 Bourse trade BUY Share VAIAS Amount 1 000 shares Total cost 23 135,60 EUR Average price/ share 23,1356 EUR Highest price/ share 23,20 EUR Lowest price/ share 23,00 EUR Vaisala Corporation now holds a total of 80 918 shares including the shares repurchased on 21.7.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1940272]