VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 13.8.2015 SHARE REPURCHASE 13.8.2015 In the Helsinki Stock Exchange Trade date 13.8.2015 Bourse trade BUY Share VAIAS Amount 2 000 shares Total cost 49 822,00 EUR Average price/ share 24,9110 EUR Highest price/ share 25,00 EUR Lowest price/ share 24,80 EUR Vaisala Corporation now holds a total of 102 415 shares including the shares repurchased on 13.8.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1945524]