F-SECURE CORPORATION STOCK EXCHANGE RELEASE September 2, 2009 Subscription of F-Secure shares with F-Secure 2005 warrants A total of 54,625 F-Secure shares were subscribed for with the A warrants attached to the F-Secure 2005 Warrant Plan. The issue of the 2005 Warrant Plan was approved by the Annual General Meeting on March 23, 2005. In aggregate the number of shares was increased by 54,625. The corresponding increase in the share capital was registered in the Finnish Trade Register on September 2, 2009. F-Secure received as subscription price a total amount of EUR 74,290.00, which will be recorded in the fund for company's distributable equity. As a result of the registering the total number of shares is 156,825,032. 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 September 3, 2009. The subscription period for the 2005 A warrants began on March 3, 2008. F-Secure Corporation Taneli Virtanen CFO Additional information: F-Secure Corporation Taneli Virtanen, CFO tel. 358 9 2520 5655 DISTRIBUTION Helsinki Exchanges Main media