VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 27.7.2015 SHARE REPURCHASE 27.7.2015 In the Helsinki Stock Exchange Trade date 27.7.2015 Bourse trade BUY Share VAIAS Amount 4 000 shares Total cost 95 849,20 EUR Average price/ share 23,9623 EUR Highest price/ share 24,00 EUR Lowest price/ share 23,50 EUR Vaisala Corporation now holds a total of 87 374 shares including the shares repurchased on 27.7.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1941516]