Stonesoft - Company Announcement

STONESOFT CORPORATION: NOTIFICATION PURSUANT TO CHAPTER 9, SECTION 10 OF THE FINNISH SECURITIES MARKET ACT

Stonesoft Corporation Stock Exchange Release 6 May 2013 at 14.42 pm

STONESOFT CORPORATION: NOTIFICATION PURSUANT TO CHAPTER 9, SECTION 10 OF THE
FINNISH SECURITIES MARKET ACT

Stonesoft Corporation has received the following notification on 6 May 2013:

NOTIFICATION OF A CHANGE IN SHAREHOLDING PURSUANT TO CHAPTER 9, SECTION 5 OF THE
FINNISH SECURITIES MARKET ACT

1. Issuer of the shares

Stonesoft Corporation, business identity code 0837548-0.

2. Name of the shareholder subject to notification obligation

Shareholder Mr. Ilkka Hiidenheimo.

3. Reason for the notification

McAfee Suomi Funding LLC launched today 6 may 2013 a voluntary public tender
offer ("Tender Offer") for all shares and option rights in Stonesoft
Corporation. Pursuant to the Tender Offer Mr. Ilkka Hiidenheimo has irrevocably
and unconditionally undertaken to accept the Tender Offer.

At  the moment Mr. Hiidenheimo's share of  the total number of shares and voting
rights  exceeds 15 per cent (3/20). The acceptance period under the Tender Offer
is  expected to commence  on or about  21 May 2013 and to  run for approximately
three (3) weeks, unless the offer period is extended. Should the Tender Offer be
completed  Mr.  Hiidenheimo's  share  of  the  total number of shares and voting
rights will come down to 0 per cent.

4. Mr. Hiidenheimo's existing shareholding and voting rights

+----------------+-------------------+----------------------+------------------+
|Number of shares|% of total number  |Number of voting      |% of total number |
|                |of shares          |rights                |of voting rights  |
+----------------+-------------------+----------------------+------------------+
|10 417 400      |16,25 %            |10 417 400            |16,25 %           |
+----------------+-------------------+----------------------+------------------+


5. Mr. Hiidenheimo's total shareholding if the Tender Offer shall be completed

+----------------+--------------------+--------------------+-------------------+
|Number of shares|% of total number of|Number   of   voting|%  of  total number|
|                |shares              |rights              |of voting rights   |
+----------------+--------------------+--------------------+-------------------+
|0               |0                   |0                   |0                  |
+----------------+--------------------+--------------------+-------------------+

The percentages have been calculated in proportion to the total number of shares
registered  at the Trade Register  on 6 May 2013 and the  total number of voting
rights related to them, i.e. 64,090,482 shares and voting rights.

Helsinki, 6 May 2013

ILKKA HIIDENHEIMO

For further information, please contact:
Mikael Nyberg, CFO, Stonesoft Corporation
Tel. +358 9 476 711
E-mail: mikael.nyberg@stonesoft.com

Distribution:
NASDAQ OMX Helsinki Ltd
Main media
www.stonesoft.com


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