VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 30.10.2015 SHARE REPURCHASE 30.10.2015 In the Helsinki Stock Exchange Trade date 30.10.2015 Bourse trade BUY Share VAIAS Amount 1 000 shares Total cost 24.648,00 EUR Average price/ share 24,6480 EUR Highest price/ share 24,70 EUR Lowest price/ share 24,50 EUR Vaisala Corporation now holds a total of 165 264 shares including the shares repurchased on 30.10.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1963062]