VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 31.7.2015 SHARE REPURCHASE 31.7.2015 In the Helsinki Stock Exchange Trade date 31.7.2015 Bourse trade BUY Share VAIAS Amount 2 100 shares Total cost 50 319,15 EUR Average price/ share 23,9615 EUR Highest price/ share 23,97 EUR Lowest price/ share 23,80 EUR Vaisala Corporation now holds a total of 90 100 shares including the shares repurchased on 31.7.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1942982]