Ilmarinen Mutual Pension Insurance Company’s holding in F-Secure exceeds 5 %

Announcement pursuant to Securities Act Chapter 2, Section 10

Stock Exchange Announcement
October 15, 2008 at 4.30 pm

F-Secure Corporation has today been informed by Ilmarinen Mutual Pension Insurance Company (register number 0107638-1) that the holding of Ilmarinen in F-Secure exceeds one-twentieth (1/20) and is at the present 5.36%.

1. The company: F-Secure Corporation

2. The date of change in holding: October 15, 2008

3. Exact proportion of voting rights and share capital in F-Secure Corporation:

Totally 8,320,479 shares; 5.36% of voting rights and share capital.

4. Shareholder: Ilmarinen Mutual Pension Insurance Company

F-Secure Oyj
Taneli Virtanen
CFO

For more information, please contact: F-Secure Corporation
Mervi Pohjoisaho, IR tel. +358 40 535 8989