VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 23.7.2015 SHARE REPURCHASE 23.7.2015 In the Helsinki Stock Exchange Trade date 23.7.2015 Bourse trade BUY Share VAIAS Amount 1 000 shares Total cost 24 000,00 EUR Average price/ share 24,0000 EUR Highest price/ share 24,00 EUR Lowest price/ share 24,00 EUR Vaisala Corporation now holds a total of 82 674 shares including the shares repurchased on 23.7.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1940929]