VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 15.10.2015 SHARE REPURCHASE 15.10.2015 In the Helsinki Stock Exchange Trade date 15.10.2015 Bourse trade BUY Share VAIAS Amount 450 shares Total cost 10.650,02 EUR Average price/ share 23,6667 EUR Highest price/ share 23,70 EUR Lowest price/ share 23,60 EUR Vaisala Corporation now holds a total of 155 599 shares including the shares repurchased on 15.10.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1959212]