VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 8.6.2015 SHARE REPURCHASE 8.6.2015 In the Helsinki Stock Exchange Trade date 8.6.2015 Bourse trade BUY Share VAIAS Amount 250 shares Total cost 6 187,50 EUR Average price/ share 24,7500 EUR Highest price/ share 24,75 EUR Lowest price/ share 24,75 EUR Vaisala Corporation now holds a total of 60 540 shares including the shares repurchased on 8.6.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1927091]