VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 16.10.2015 SHARE REPURCHASE 16.10.2015 In the Helsinki Stock Exchange Trade date 16.10.2015 Bourse trade BUY Share VAIAS Amount 200 shares Total cost 4.683,92 EUR Average price/ share 23,4196 EUR Highest price/ share 23,54 EUR Lowest price/ share 23,31 EUR Vaisala Corporation now holds a total of 155 799 shares including the shares repurchased on 16.10.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1959447]