VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 7.8.2015 SHARE REPURCHASE 7.8.2015 In the Helsinki Stock Exchange Trade date 7.8.2015 Bourse trade BUY Share VAIAS Amount 331 shares Total cost 8 149,48 EUR Average price/ share 24,6208 EUR Highest price/ share 24,70 EUR Lowest price/ share 24,50 EUR Vaisala Corporation now holds a total of 99 965 shares including the shares repurchased on 7.8.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1944409]