Stonesoft - Company Announcement

ADVANCE INFORMATION ON THE Q1 2013 NET SALES AND OPERATING RESULT

Stonesoft Corporation Stock Exchange Release April 12, 2013 at 3:15 PM

ADVANCE INFORMATION ON THE Q1 2013 NET SALES AND OPERATING RESULT

Stonesoft Corporation's product sales in the first quarter of the year 2013 were
approximately EUR 5.4 million and grew by approximately 9% compared to the
corresponding period in the previous year. The net sales of the quarter were
approximately EUR 9.2 million, corresponding to 12% growth. Operating result was
approximately EUR 2.2 million negative.

The advance information is unaudited and it is not based on an interim report
approved by the Board of Directors.

The company has previously announced:"The company's budgeted net sales for 2013 are MEUR 60 and the net sales target
set in the strategy for the year 2014 is approximately MEUR 90. To support this,
the company will enter several new markets during 2013 and actively develop
partner business.

While the company is aiming for strong growth, the operating profit (EBIT) for
the first quarter of the year is expected to be negative and the operating
profit for the full year to improve compared to the previous year."

The company maintains its guidance for the full year."Our strong investments in growth together with the negative variation between
quarters resulted in a worse operating result than expected, but the full year
still looks strong. The company still aims at 50% growth and MEUR 60 net sales
for the year 2013", stated CEO Ilkka Hiidenheimo.

Stonesoft Corporation's interim report for 1 January - 31 March 2013 will be
published as previously announced on Friday 26 April, 2013. A press conference
for the media, analysts and investors will be held on 26 April at 10:30 am at
the Stonesoft headquarters, street address Itälahdenkatu 22 A, 00210 Helsinki.

Stonesoft Corporation
Ilkka Hiidenheimo
Chief Executive Officer

For further information, please contact:
CFO Mikael Nyberg
Stonesoft Corporation
Tel.+358 9 4767 11

Distribution:
NASDAQ OMX Helsinki Ltd
www.stonesoft.com

[HUG#1692764]