VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 9.7.2015 SHARE REPURCHASE 9.7.2015 In the Helsinki Stock Exchange Trade date 9.7.2015 Bourse trade BUY Share VAIAS Amount 1 000 shares Total cost 22 974,61 EUR Average price/ share 22,9746 EUR Highest price/ share 23,10 EUR Lowest price/ share 22,71 EUR Vaisala Corporation now holds a total of 75 379 shares including the shares repurchased on 9.7.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1936405]