VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 16.6.2015 SHARE REPURCHASE 16.6.2015 In the Helsinki Stock Exchange Trade date 16.6.2015 Bourse trade BUY Share VAIAS Amount 1 500 shares Total cost 35 608,05 EUR Average price/ share 23,7387 EUR Highest price/ share 23,86 EUR Lowest price/ share 23,60 EUR Vaisala Corporation now holds a total of 63 440 shares including the shares repurchased on 16.6.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1928930]