VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 7.10.2015 SHARE REPURCHASE 7.10.2015 In the Helsinki Stock Exchange Trade date 7.10.2015 Bourse trade BUY Share VAIAS Amount 4 000 shares Total cost 93.040,47 EUR Average price/ share 23,2601 EUR Highest price/ share 23,30 EUR Lowest price/ share 23,24 EUR Vaisala Corporation now holds a total of 146 324 shares including the shares repurchased on 7.10.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1957495]