VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 10.11.2015 SHARE REPURCHASE 10.11.2015 In the Helsinki Stock Exchange Trade date 10.11.2015 Bourse trade BUY Share VAIAS Amount 1 500 shares Total cost 36.654,00 EUR Average price/ share 24,4360 EUR Highest price/ share 24,50 EUR Lowest price/ share 24,30 EUR Vaisala Corporation now holds a total of 174 984 shares including the shares repurchased on 10.11.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1965939]