VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 28.7.2015 SHARE REPURCHASE 28.7.2015 In the Helsinki Stock Exchange Trade date 28.7.2015 Bourse trade BUY Share VAIAS Amount 326 shares Total cost 7 683,62 EUR Average price/ share 23,5694 EUR Highest price/ share 23,57 EUR Lowest price/ share 23,52 EUR Vaisala Corporation now holds a total of 87 700 shares including the shares repurchased on 28.7.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1941826]