F-SECURE CORPORATION STOCK EXCHANGE RELEASE August 27, 2008 10.15 am Subscription of F-Secure shares with F-Secure 2002 warrants A total of 15,000 F-Secure shares were subscribed for with the A1/A2 warrants, total of 17,000 F-Secure shares were subscribed for with the B1/B2/B3 warrants and the total of 66,774 F-Secure shares were subscribed for with the C1/C2/C3 warrants attached to the F-Secure 2002 Warrant Plan. The issue of the 2002 Warrant Plan was approved by the Annual General Meeting on March 27, 2002, respectively. In aggregate the number of shares was increased by 98,774. The corresponding increase in the share capital was registered in the Finnish Trade Register on August 27, 2008. F-Secure received as subscription price a total amount of EUR 131,138.40, which will be recorded in the fund for company's distributable equity. As a result of the registering the total number of shares is 155,301,612. The holders of the new shares are entitled to all shareholders' rights from the registration day. The Company has submitted an application for the new shares to be listed on the Helsinki Exchanges together with the other Company shares. The trading with the new shares will commence on August 28, 2008. The subscription period for the A1 warrants began on 1 November 2003, for the A2 and B1 warrants on 1 November 2004, for the B2 warrants on 1 November 2005 and for the B3, C1 and C2 warrants on 1 November 2006 and for the C3 warrants on 1 November 2007 of the F-Secure 2002 Warrant Plan, respectively. F-Secure Corporation Taneli Virtanen CFO Additional information: F-Secure Corporation Taneli Virtanen, CFO tel. 358 9 2520 5655 DISTRIBUTION Helsinki Exchanges Main media