Announcement pursuant to Securities Act Chapter 2, Section 10

May 5, 2008

F-Secure Corporation has been informed today by Osuuspankkikeskus Osk (identity 0242522-1) that OPK’s proportion of holding and voting rights is below one-twentieth (1/20). 

1. The company: F-Secure Corporation

2. The date of change in holding: May 5, 2008

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

Totally 6,258,511 shares; 4.03% of voting rights and share capital.

4. Shareholder:

Shareholders and their share of voting rights and of share capital.

OPK’s proportion of holding and voting rights 
0743962-2
Shares 

of capital

of  votes

Pohjola Vakuutus Oy
1458359-3

200.000 0,129 % 0,129 %

A-Vakuutus Oy
1715947-2

25.000 0,016 % 0,016 %

OP-Delta
1102395-3

2.494.930 1,608 % 1,608 %

OP-Focus
1753298-6

1.244.424 0,802 % 0,802 %

OP-Pohjola Pienyhtiöt
1960678-2

400.000 0,258 % 0,258 %

OP-Suomi Pienyhtiöt
1753300-6

1.894.157 1,221 % 1,221 %

Total

6.258.511 4,034 % 4,034 %