VAISALA CORPORATION STOCK EXCHANGE ANNOUNCEMENT 3.11.2015 SHARE REPURCHASE 3.11.2015 In the Helsinki Stock Exchange Trade date 3.11.2015 Bourse trade BUY Share VAIAS Amount 1 000 shares Total cost 24.644,00 EUR Average price/ share 24,6440 EUR Highest price/ share 24,77 EUR Lowest price/ share 24,35 EUR Vaisala Corporation now holds a total of 167 264 shares including the shares repurchased on 3.11.2015. On behalf of Vaisala Corporation NORDEA BANK FINLAND PLC Janne Sarvikivi Julius Summanen [HUG#1963838]