VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 23.6.2015 SHARE REPURCHASE 23.6.2015 In the Helsinki Stock Exchange Trade date 23.6.2015 Bourse trade BUY Share VAIAS Amount 1 200 shares Total cost 28 235,70 EUR Average price/ share 23,5298 EUR Highest price/ share 23,60 EUR Lowest price/ share 23,39 EUR Vaisala Corporation now holds a total of 68 019 shares including the shares repurchased on 23.6.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1930788]