VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 9.5.2016 SHARE REPURCHASE 9.5.2016 In the Helsinki Stock Exchange Trade date 9.5.2016 Bourse trade BUY Share VAIAS Amount 350 shares Total cost 8.774,00 EUR Average price/ share 25,0686 EUR Highest price/ share 25,10 EUR Lowest price/ share 25,00 EUR Vaisala Corporation now holds a total of 199 509 shares including the shares repurchased on 9.5.2016. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#2010907]