F-Secure Corporation ANNOUNCEMENT 21.12.2010 SHARE REPURCHASE 21.12.2010 In the Helsinki Stock Exchange Trade date 21.12.2010 Bourse trade BUY Share FSC1V Amount 20.000 shares Total cost 40.790,00 EUR Average price/ share 2,0395 EUR Highest price/ share 2,05 EUR Lowest price/ share 2,03 EUR F-Secure Corporation now holds a total of 3.287.313 shares including the shares repurchased on 21.12.2010. On behalf of F-Secure Corporation Nordea Bank Finland Plc Petri Simberg Julius Summanen