VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 19.10.2015 SHARE REPURCHASE 19.10.2015 In the Helsinki Stock Exchange Trade date 19.10.2015 Bourse trade BUY Share VAIAS Amount 2 341 shares Total cost 54.464,77 EUR Average price/ share 23,2656 EUR Highest price/ share 23,50 EUR Lowest price/ share 23,22 EUR Vaisala Corporation now holds a total of 158 140 shares including the shares repurchased on 19.10.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1959873]