STONESOFT OYJ : 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

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

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