Subscription of F-Secure shares with directed offering

Helsinki, Finland - December 2, 2005

The Board of Directors of F-Secure Corporation have executed, based on the authorization given by the Annual General Meeting of Shareholders on 23 March 2005, the share offering directed to the shareholders of Rommon Oy. This directed offering has been a partial payment of the acquisition price according to the acquisition agreement. A total of 791,806 F-Secure shares were subscribed for with price of EUR 1.894403427 per share.

In aggregate the number of shares was increased by 791,806. The corresponding increase in the share capital, in total EUR 7,918.06 was registered in the Finnish Trade Register on December 2, 2005. As a result of the increase, the share capital of F-Secure currently is EUR 1,547,118.18 and the total number of shares is 154,711,818.

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 December 5, 2005.

F-Secure Corporation

Risto Siilasmaa
President & CEO

Additional information:

F-Secure Corporation
Taneli Virtanen, CFO
tel.358 9 2520 5655

DISTRIBUTION
Helsinki Exchanges
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