VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 9.11.2015 SHARE REPURCHASE 9.11.2015 In the Helsinki Stock Exchange Trade date 9.11.2015 Bourse trade BUY Share VAIAS Amount 1 020 shares Total cost 24.833,43 EUR Average price/ share 24,3465 EUR Highest price/ share 24,40 EUR Lowest price/ share 24,30 EUR Vaisala Corporation now holds a total of 173 484 shares including the shares repurchased on 9.11.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1965598]