VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 18.6.2015 SHARE REPURCHASE 18.6.2015 In the Helsinki Stock Exchange Trade date 18.6.2015 Bourse trade BUY Share VAIAS Amount 300 shares Total cost 6 933,00 EUR Average price/ share 23,1100 EUR Highest price/ share 23,11 EUR Lowest price/ share 23,11 EUR Vaisala Corporation now holds a total of 65 819 shares including the shares repurchased on 18.6.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1929680]