F-Secure Corporation STOCK EXCHANGE ANNOUNCEMENT 31.8.2010 SHARE REPURCHASE 31.8.2010 In the Helsinki Stock Exchange Trade date 31.8.2010 Bourse trade BUY Share FSC1V Amount 20.000 shares Total cost 43.672,60 EUR Average price/ share 2,1836 EUR Highest price/ share 2,19 EUR Lowest price/ share 2,14 EUR F-Secure Corporation now holds a total of 2.785.357 shares including the shares repurchased on 31.8.2010. On behalf of F-Secure Corporation Nordea Bank Finland Plc Petri Simberg Julius Summanen