F-Secure Corporation STOCK EXCHANGE ANNOUNCEMENT 24.9.2010 SHARE REPURCHASE 24.9.2010 In the Helsinki Stock Exchange Trade date 24.9.2010 Bourse trade BUY Share FSC1V Amount 2.000 shares Total cost 4.400,00 EUR Average price/ share 2,2000 EUR Highest price/ share 2,20 EUR Lowest price/ share 2,20 EUR F-Secure Corporation now holds a total of 2.810.698 shares including the shares repurchased on 24.9.2010. On behalf of F-Secure Corporation Nordea Bank Finland Plc Petri Simberg Julius Summanen