VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 24.6.2015 SHARE REPURCHASE 24.6.2015 In the Helsinki Stock Exchange Trade date 24.6.2015 Bourse trade BUY Share VAIAS Amount 900 shares Total cost 21 252,50 EUR Average price/ share 23,6139 EUR Highest price/ share 23,69 EUR Lowest price/ share 23,50 EUR Vaisala Corporation now holds a total of 68 919 shares including the shares repurchased on 24.6.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1931201]